US Pat. No. 9,564,808

ELECTRIC POWER CONVERSION DEVICE

Mitsubishi Electric Corpo...

1. An electric power conversion device comprising a plurality of cell converters connected in cascade, the plurality of cell
converters each including:
a main circuit having a semiconductor switching element and a capacitor;
a drive circuit for driving the semiconductor switching element; and
a self-feeding device for supplying power to the drive circuit by being supplied with power from the main circuit, wherein
to each self-feeding device, a first feed line for supplying power to the drive circuit in the corresponding cell converter
and a second feed line for supplying power to the drive circuit in another cell converter are connected, and

each drive circuit can be supplied with power via the first feed line from the self-feeding device in the corresponding cell
converter, and can be supplied with power via the second feed line from the self-feeding device in the other cell converter.

US Pat. No. 9,048,770

SYNCHRONOUS MACHINE STARTING DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A synchronous machine starting device comprising:
a power conversion unit for converting supplied power into AC power and supplying the AC power to an armature of a synchronous
machine;

an AC voltage detection unit for detecting AC voltage supplied to or generated at the armature of said synchronous machine;
an AC current detection unit for detecting AC current supplied to or generated at the armature of said synchronous machine;
a rotor position detection unit for detecting a rotor position of said synchronous machine, based on said detected AC voltage
and AC current; and

a power conversion control portion for controlling said power conversion unit, based on said detected rotor position,
said rotor position detection unit including:
a timing detection unit for outputting a first position signal indicating a timing at which a value of said detected AC voltage
passes a prescribed reference level;

a feedback operation unit for calculating an error of an estimated phase based on said estimated phase indicating said rotor
position, an estimated rotational speed of the rotor of said synchronous machine, as well as said detected AC voltage and
AC current, updating said estimated phase and said estimated rotational speed based on said calculated phase error, and outputting
a second position signal indicating said updated estimated phase;

a frequency detection unit for detecting a first frequency corresponding to a rotational speed of the rotor of said synchronous
machine at the time of starting of said synchronous machine starting device based on said first position signal, for use as
an initial frequency corresponding to an initial value of said estimated rotational speed; and

a selector circuit for selecting said first position signal or a position signal obtained based on said first position signal,
outputting the selected signal to said power conversion control portion as a signal indicating the rotor position of said
synchronous machine, releasing selection of said first position signal or the position signal obtained based on said first
position signal, and thereafter selecting said second position signal for output to said power conversion control portion
as a signal indicating the rotor position of said synchronous machine.

US Pat. No. 9,322,881

PARTIAL DISCHARGE MEASUREMENT SYSTEM AND PARTIAL DISCHARGE MEASUREMENT METHOD BY REPEATED IMPULSE VOLTAGE

TOSHIBA MITSUBISHI-ELECTR...

1. A partial discharge measurement system based on repeated impulse voltage, the system comprising:
a DC power supply that outputs high voltage as a voltage obtained by multiplying an instruction voltage by a set factor;
a signal generator that generates a pulse signal representing a predetermined pulse width and a predetermined pulse repetition
frequency, and superimposes a period setting signal whose one period includes a pulse supply period and a pulse pause period
following the pulse supply period and the pulse signal on each other to generate a rectangular waveform signal in which a
predetermined number of the pulse signals are generated only in the pulse supply period;

a semiconductor switch that charges a capacitive element with the high voltage from the DC power supply when a voltage value
of the rectangular waveform signal is lower than a preset voltage threshold, while applies an impulse voltage having a peak
value equal to a value of the high voltage from the capacitive element to an object to be measured when the voltage value
of the rectangular waveform signal is equal to or higher than the voltage threshold;

a signal instruction section that outputs, to the signal generator, a square wave instruction signal in which the predetermined
pulse width, the predetermined pulse repetition frequency, and the predetermined number are set;

a voltage instruction section that outputs, to the DC power supply, a voltage instruction signal in which an initial voltage
is set as the instruction voltage in a first period of the rectangular waveform signal and sets in the voltage instruction
signal, in second and subsequent periods, a voltage obtained by adding a predetermined increment voltage lower than the initial
voltage to the instruction voltage in the immediately previous period as the instruction voltage;

a detection signal observation circuit that observes a detection signal based on a partial discharge generated in the object
to be measured to which the impulse voltages are applied;

a partial discharge frequency calculation section that counts the number of inputs of the detection signal on a per period
basis as a partial discharge frequency;

an application voltage signal observation circuit that observes an application voltage signal representing the impulse voltage
to be applied to the object to be measured; and

a voltage value acquiring section that sets, in a period in which the partial discharge frequency first becomes equal to or
more than a specified frequency, a peak value of a voltage represented by the application voltage signal from the application
voltage observation circuit as a partial discharge starting voltage.

US Pat. No. 9,559,612

POWER CONVERSION DEVICE

Mitsubishi Electric Corpo...

1. A power conversion device comprising:
a capacitor series circuit composed of a first smoothing capacitor and a second smoothing capacitor connected in series to
each other; and

a power conversion section including a plurality of semiconductor switching elements and for performing power conversion between
DC power of the capacitor series circuit and AC power,

the power conversion device further comprising:
a first connection line connecting a positive electrode of the capacitor series circuit and a positive electrode of the power
conversion section;

a second connection line connecting a negative electrode of the capacitor series circuit and a negative electrode of the power
conversion section; and

a third connection line connecting in series the first smoothing capacitor and the second smoothing capacitor, wherein
one of the first and second connection lines is composed of two bus bars that are not adjacent to each other and that are
connected in parallel to each other, the other of the first and second connection lines is composed of one bus bar disposed
so as to be adjacent to one of the two bus bars connected in parallel to each other, the third connection line is composed
of one bus bar, and the four bus bars in total are stacked in close contact with one another via insulating layers to form
a stacked bus bar.

US Pat. No. 9,428,832

HEAT EQUALIZER

TOSHIBA MITSUBISHI-ELECTR...

1. A heat equalizer comprising:
a container structure including an outer container with a closed space which is formed in said outer container and in which
a working fluid is held;

heating means placed at a bottom of said outer container; and
a pipe channel in which a material to be heated flows,
said pipe channel including:
a material feed pipe allowing an outside and an inside of said container structure to communicate with each other;
a main header pipe connected to said material feed pipe and extending in a horizontal direction;
branch header pipes branching from said main header pipe and extending in the horizontal direction;
a plurality of riser pipes branching from said branch header pipes and opening at an upper surface of said container structure,
a heater housing tube having one end secured to said outer container and the other end immersed in the working fluid of liquid
state; and

a heater housed in said heater housing tube and having a heat generating portion, wherein
said heat generating portion is placed away from said one end of said heater housing tube that is secured to said outer container.

US Pat. No. 9,197,201

IMPULSE VOLTAGE GENERATION DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. An impulse voltage generation device comprising:
a high voltage generator for generating a high voltage;
a capacitive element;
a signal generator for generating a combined signal that is generated only in a period where supply of a pulse signal is effected
by superimposing a period setting signal whereof one cycle includes a pulse supply period and a pulse idling period subsequent
to the pulse supply period on a pulse signal whose frequency is an impulse repetition frequency higher than the frequency
of the period setting signal and whose amplitude represents a voltage value that is lower than the high voltage value; and

a semiconductor switch for accumulating electric charge on the capacitive element by means of the high voltage from the high
voltage generator when the voltage value of the combined signal is lower than the set gate voltage value, generating an impulse
voltage whose peak value is the value of the high voltage by means of the electric charge that is discharged from the capacitive
element when the voltage value of the combined signal exceeds the set gate voltage value and supplying the impulse voltage
between the first output terminal and the second output terminal where a load is provided.

US Pat. No. 9,438,135

ELECTRIC POWER CONVERTER INCLUDING A STABILIZATION CIRCUIT

TOSHIBA MITSUBISHI-ELECTR...

1. An electric power converter configured to convert DC power to AC power, comprising:
a DC stabilization circuit configured to stabilize a DC voltage from DC power supply; and
an inverter configured to convert the DC voltage stabilized by said DC stabilization circuit to an AC voltage,
said DC stabilization circuit including:
first and second input terminals configured to receive the DC voltage from said DC power supply;
first and second output terminals connected to said inverter;
a smoothing capacitor connected between said first and second input terminals and configured to smooth the DC voltage between
said first and second input terminals;

a saturable reactor connected between said first and second input terminals and said first and second DC output terminals,
and configured to prevent said DC stabilization circuit from oscillating; and

a film capacitor connected between said first and second DC output terminals and configured to supply a ripple current to
said inverter, wherein

said saturable reactor includes a first coil connected between said first DC output terminal and said first input terminal
and a second coil connected between said second input terminal and said second DC output terminal, and

said first and second coils are mutually magnetically coupled.

US Pat. No. 9,350,261

POWER CONVERTER APPARATUS APPLIED TO WIND POWER GENERATION SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A power converter apparatus that is applied to a wind power generation system and converts power generated by a wind power
generator to alternating-current power supplied for a power system, the power converter apparatus comprising:
a system voltage detector configured to detect a system voltage of the power system;
a converter controller configured to be exclusively controlled by an alternating-current detected from the wind power generator,
generate a power instruction value and a gate signal only based on the alternating-current and input the generated gate signal
to a converter that converts the alternating-current to a direct-current:

an inverter controller configured to receive the generated power instruction value from the converter controller; and
an inverter configured to convert the direct-current converted by the converter to the alternating-current power supplied
for the power system,

wherein the inverter controller is configured to control the inverter to stably output power generated by the wind power generator
to the power system based on another power instruction value from a higher level controller and to control an output voltage
of the inverter to stabilize the system voltage of the power system based on an alternating-current voltage instruction value
when the system voltage detected by the system voltage detector is within a preset range having an upper limit and a lower
limit, and configured to control an output current of the inverter such that an active current component and a reactive current
component are those corresponding to a variation rate of the system voltage to stabilize the system voltage of the power system
by use of a voltage drop due to impedance of the power system when the system voltage detected by the system voltage detector
is outside the preset range.

US Pat. No. 9,661,785

POWER CONVERSION APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion apparatus comprising:
a power conversion circuit including a heat source;
a heat pipe cooler in which a refrigerant is enclosed, the heat pipe cooler being provided within the power conversion apparatus
and configured to cool the heat source;

a freeze determiner configured to determine whether the refrigerant is frozen; and
an output limiter configured to limit output of the power conversion circuit when the freeze determiner determines that the
refrigerant is frozen.

US Pat. No. 9,564,827

POWER CONVERSION DEVICE

Mitsubishi Electric Corpo...

1. A power conversion device which is connected between an AC circuit for plural phases and a DC circuit and performs power
conversion between the AC circuit and the DC circuit, the power conversion device comprising:
a first arm and a second arm provided for each phase and having one ends connected in series to each other, wherein
the first arm and the second arm are each composed of one or a plurality of unit cells connected in series to each other,
each unit cell being composed of: a series unit including a plurality of semiconductor switches connected in series to each
other; and a DC capacitor connected in parallel to the series unit, a terminal of the semiconductor switch serving as an output
end of the unit cell,

a connection point between the first arm and the second arm for each phase is connected to a corresponding phase of the AC
circuit,

another one end of the first arm for each phase is connected to a positive side of the DC circuit, and
another one end of the second arm for each phase is connected to a negative side of the DC circuit,
the power conversion device further comprising:
circulating current calculation means for calculating a circulating current component for each phase which circulates between
the respective phases not via the AC circuit and the DC circuit; and

a circulating current control unit for controlling the circulating current component for each phase so as to follow a predetermined
circulating current command value,

the power conversion device thereby suppressing variation in voltages of the DC capacitors among the phases.

US Pat. No. 9,559,557

ROTATING ELECTRICAL MACHINE

Toshiba Mitsubishi-Electr...

1. A rotating electrical machine comprising:
a rotor which is rotatably supported and which has, on its outer circumference, a plurality of convex-shaped salient pole
sections arranged in a circumferential direction;

a stator core which is disposed around the outer circumference of the rotor with an air gap formed therebetween and which
has, on its inner circumference, a plurality of convex-shaped teeth arranged in a circumferential direction, with axial-direction
grooves that are formed on radial-direction inner sides of the teeth and open to radial-direction inner sides and both axial-direction
sides and extend in the axial-direction;

field windings each of which is wound around each of the plurality of the teeth, each of the field windings forming a pole;
and

armature windings each of which is wound around each of the plurality of the teeth so as to be insulated from the field windings,
forming a plurality of poles,

a plurality of conductor rods that are disposed in each of the axial-direction grooves; and
a plurality of conductor connection members that are disposed on each of both sides of axial-direction outer sides of the
rotor, and to each of which axial-direction end portions of a predetermined number of the conductor rods are connected, and
which make up one closed electrical circuit along with a plurality of the conductor rods, wherein

the number of the teeth and the number of the poles formed by the field windings are equal, and
a ratio of the number of the poles formed by the field windings to the number of the poles formed by the armature windings
is equal to a predetermined ratio, and the number of the salient pole sections formed in the rotor is equal to (pf+pa)/2, where pf is the number of the poles formed by the field windings, and pa is the number of the poles formed by the armature windings.

US Pat. No. 9,374,033

THREE-LEVEL POWER CONVERSION APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A three-level power conversion apparatus, comprising:
first and second three-level converters connected in parallel to an AC power supply system, each of which outputs a three
levels direct current;

positive side and negative side DC capacitors connected to the DC link of the three levels;
at least one three-level inverter to convert the DC output of the three levels to an alternating current, to drive an AC motor;
and

converter control means for controlling the first and second three-level converters;
wherein the converter control means has:
first and second reactive current control means for controlling so that reactive portions of input currents of the first and
second three-level converters become a prescribed reactive current reference, respectively;

first and second neutral point voltage fluctuation suppressing means for controlling first and second PWM control means, respectively,
so as to make a difference between voltages applied to the positive side and negative side DC capacitors to be zero; and

active current control means for supplying a prescribed circulating active current from the first three-level converter to
the second three-level converter.

US Pat. No. 9,281,740

POWER CONVERSION APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion apparatus converting DC power supplied from a DC power supply having a first electrode and a second
electrode into AC power for supply to a load, said power conversion apparatus comprising:
an AC terminal for outputting said AC power,
a first DC division capacitor and a second DC division capacitor connected in series between said first electrode and said
second electrode,

a first main switch having a first end coupled to said first electrode of said DC power supply, and a second end coupled to
said load,

a first main diode connected in parallel with said first main switch, so as to have a conducting direction opposite to the
conducting direction of said first main switch,

a second main switch having a first end coupled to a second end of said first main switch, and a second end coupled to said
second electrode of said DC power supply, and provided so as to have a conducting direction identical to the conducting direction
of said first main switch,

a second main diode connected in parallel with said second main switch, so as to have a conducting direction opposite to the
conducting direction of said second main switch,

a first snubber capacitor and a second snubber capacitor,
a first snubber diode and a second snubber diode connected in series between said first snubber capacitor and said second
snubber capacitor,

a protection circuit for causing, when voltage applied to said first snubber capacitor becomes greater than or equal to a
predetermined value or when voltage applied to said second snubber capacitor becomes greater than or equal to a predetermined
value, a charging current formerly flowing from said DC power supply to said first snubber capacitor or said second snubber
capacitor to flow to another current path, and

a control circuit controlling said first main switch and said second main switch to be turned on and off,
said first snubber capacitor provided between an anode of said first main diode and a cathode of said first snubber diode,
said second snubber capacitor provided between a cathode of said second main diode and an anode of said second snubber diode,
said protection circuit including
a transformer, and
a first clamp diode and a second clamp diode connected in parallel with said first main switch and said second main switch,
and provided between said first electrode and said second electrode, so as to have a conducting direction opposite to the
conducting direction of said first main switch and said second main switch,

said transformer including
a first primary winding and a second primary winding connected in series, and
a first secondary winding and a second secondary winding provided corresponding to said first and second primary windings,
respectively,

a connection node of said first primary winding and said second primary winding being connected to said AC terminal, and
a coupling node of a first unit having said first clamp diode and said first secondary winding connected in series and a second
unit having said second clamp diode and said second secondary winding connected in series being connected to a connection
node of said first DC division capacitor and said second DC division capacitor.

US Pat. No. 9,143,049

THREE-LEVEL POWER CONVERSION APPARATUS

MITSUBISHI ELECTRIC CORPO...

1. A three-level power conversion apparatus comprising:
a direct current power supply circuit that has a positive side terminal, a negative side terminal and an intermediate potential
point;

a semiconductor module that is inserted between said positive side terminal and said negative side terminal; and
a bi-directional switch that is inserted between said intermediate potential point and said semiconductor module;
wherein said semiconductor module is composed of:
a first switch element with a collector thereof connected to the positive side terminal of said direct current power supply
circuit, and a diode connected in anti-parallel to said first switch element; and

a second switch element with an emitter thereof connected to the negative side terminal of said direct current power supply
circuit, and a diode connected in anti-parallel to said second switch element;

wherein said bi-directional switch is composed of a series circuit including a third switch element and a fourth switch element
that are connected between a connection point of an emitter of said first switch element and a collector of said second switch
element, and the intermediate potential point of said direct current power supply circuit;

wherein an electric potential of three levels is outputted from an output terminal of said semiconductor module;
wherein said three-level power conversion apparatus further comprises:
a first conductor that makes a connection between the positive side terminal of said direct current power supply circuit and
said first switch element;

a second conductor that makes a connection between the negative side terminal of said direct current power supply circuit
and said second switch element;

a third conductor that makes a connection between the intermediate potential point of said direct current power supply circuit
and said third switch element;

a fourth conductor that makes a connection between said fourth switch element and said connection point; and
a fifth conductor that makes a connection between said third switch element and said fourth switch element;
wherein said third conductor, said fourth conductor and said fifth conductor are electrically separate and coplanar;
wherein said first conductor, said second conductor and said third conductor, said fourth conductor and said fifth conductor
are arranged in a superposed manner on said semiconductor module and said bi-directional switch so that a three-layer wiring
structure is thereby achieved, and

said third conductor, said fourth conductor and said fifth conductor are separate and are arranged between said first and
second conductors, and at the same time, said third conductor, said fourth conductor and said fifth conductor are disposed
between insulating materials to form a close contact structure.

US Pat. No. 9,384,784

DATA SYNCHRONOUS REPRODUCTION APPARATUS, DATA SYNCHRONOUS REPRODUCTION METHOD, AND DATA SYNCHRONIZATION CONTROL PROGRAM

TOSHIBA MITSUBISHI-ELECTR...

1. A data synchronous reproduction apparatus comprising:
an image data storage section configured to store a plurality of image frames on which a monitored object is captured by a
camera, together with a frame period of the image frames, as image data with frame numbers assigned to the image frames in
time series;

a process data storage section configured to store data acquired from the monitored object and including a temporal change,
and an elapsed time from a reference time point, collectively as process data;

an image data reproducer configured to output and reproduce the image data, stored in the image data storage section, on a
monitor, and to output the frame number of the image frame to be reproduced; and

a data synchronous reproduction controller configured to calculate a relative time, from a first frame, of the image frame
corresponding to the frame number outputted from the image data reproducer and to reproduce the image data on the monitor
on the basis of the calculated relative time from the first frame.

US Pat. No. 9,444,287

POWER CONVERSION DEVICE WITH RIPPLE FILTERING

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion device comprising:
a converter configured to convert first AC power into DC power for output to a power supply node;
an inverter configured to convert said DC power supplied from converter through said power supply node into second AC power;
a capacitor connected between said power supply node and a line of reference voltage, wherein
a capacitance value of said capacitor is set at a smaller value than a capacitance value to smooth a voltage of said power
supply node, and

the voltage of said power supply node is a voltage obtained by superimposing, on a DC voltage, a ripple voltage varying sinusoidally
at a frequency twice a frequency of an output voltage of said inverter,

a filter configured to receive the voltage of said power supply node and reject said ripple voltage in the received voltage
to pass a DC voltage component; and

a control circuit configured to control said converter such that said DC voltage component passed through said filter matches
a target voltage,

said filter including:
an extraction circuit configured to extract said ripple voltage from the voltage of said power supply node, and
a subtraction circuit configured to subtract said ripple voltage extracted by said extraction circuit from the voltage of
said power supply node to generate said DC voltage component,

said extraction circuit including;
a coordinate transformation circuit configured to transform a coordinate of the voltage of said power supply node from a stationary
coordinate to a rotating coordinate rotating at the frequency twice the frequency of the Output voltage of said inverter,

a low order filter configured to reject an AC component in the voltage of said power supply node on said rotating coordinate,
and

a coordinate inverse transformation circuit configured to inversely transform the coordinate of an output voltage of said
low order filter from said rotating coordinate to said stationary coordinate to generate said ripple voltage, wherein said
filter is implemented by a digital signal processor (DSP).

US Pat. No. 9,391,465

ELECTRICAL STORAGE DEVICE MANAGEMENT SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. An electrical storage device management system, comprising:
a plurality of rows of electrical storage systems;
a plurality of chargeable/dischargeable electrical storage cells constituting each of said electrical storage systems;
a plurality of switching parts provided in correspondence with said electrical storage systems;
a plurality of temperature sensors provided in correspondence with said electrical storage cells and configured to detect
temperatures of said corresponding electrical storage cells; and

a control part connected to said switching parts and said temperature sensors,
wherein
out of said plurality of rows of electrical storage systems, a first number being more than or equal to two of said electrical
storage systems is set to a charging/discharging operating state, and a second number being more than or equal to two of said
electrical storage systems is set to a non-charging/non-discharging state,

said control part has set therein a first threshold temperature,
said control part is configured to:
(A) monitor the temperatures of said electrical storage cells on the basis of temperature information transmitted from said
temperature sensors; and

when a result of said (A) indicates that the temperature of one of said electrical storage cells has reached said first threshold
temperature in one of said electrical storage systems that is in a charging/discharging operating state,

(B) perform first system switching in which said switching part that is disposed in correspondence with said electrical storage
system that includes said electrical storage cell is controlled, and said electrical storage system is switched from the charging/discharging
operating state to the non-charging/non-discharging state, and

(C) perform second system switching in which one of said switching parts that is disposed in correspondence with one of said
electrical storage systems that is in the non-charging/non-discharging state is controlled, and said electrical storage system
is switched from the non-charging/non-discharging state to the charging/discharging operating state,

said control part has set an operating state switching sequence in which said second number of electrical storage systems
are to be switched from the non-charging/non-discharging state to the charging/discharging operating state during said second
system switching,

every time the temperature of one of said electrical storage cells reaches said first threshold temperature, said control
part performs said first system switching and performs said second system switching in accordance with said operating state
switching sequence, and

the storage system that was switched in said first system switching is newly incorporated into said operating state switching
sequence in the order of said first system switching.

US Pat. No. 9,281,772

CONTROLLER FOR POWER CONVERTER

Toshiba Mitsubishi-Electr...

1. A controller for a power converter configured to drive a motor, the controller comprising:
a current detector configured to detect a current output from the power converter;
a flux vector estimation module configured to estimate a flux vector of the motor based on the current detected by the current
detector;

a torque line calculation module configured to calculate a torque line in a physical model resulting from mathemating a circuit
equivalent to the motor based on the flux vector estimated by the flux vector estimation module, the torque line indicating
a line for obtaining a desired torque in a subsequent control period;

a stator flux command value calculation module configured to calculate a stator flux command value in accordance with a loss;
a voltage command value calculation module configured to calculate a voltage command value based on the torque line calculated
by the torque line calculation module and the stator flux command value calculated by the stator flux command value calculation
module; and

an output voltage controller configured to control an output voltage of the power converter based on the voltage command value
calculated by the voltage command value calculation module.

US Pat. No. 9,090,430

LEAD WIRE PULL-OUT APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A lead wire pull-out apparatus comprising:
a lead reel configured to have a lead wire wound thereon;
two fixed lead bearings fixed at predetermined positions, on which said lead wire pulled out from said lead reel is slidable;
a movable lead bearing arranged between said two fixed lead bearings, said movable lead bearing being movable in a vertical
direction and configured such that a lower portion thereof is able to be in contact with said lead wire; and

a press-down part configured to contact and press down said movable lead bearing,
wherein said press-down part presses down said movable lead bearing by a predetermined pressing-down force to thereby pull
out said lead wire from said lead reel, and then removes said pressing-down force after said lead wire is pulled out,

wherein after said pressing-down force is removed, the press-down part is separated from the movable lead bearing so as to
be out of contact with the movable lead bearing, and

after the press-down part is separated from the movable lead bearing, said lead pull-out apparatus pulls the lead wire from
a side where said lead reel does not exist.

US Pat. No. 9,450,522

FIELD CONTROL DEVICE, METHOD OF FIELD CONTROL, AND SYNCHRONOUS ROTATING MACHINE

TOSHIBA MITSUBISHI-ELECTR...

1. A field control device for a synchronous rotating machine including armature and field windings, the field control device
comprising:
a target operating condition input unit to accept, as inputs, target operating condition demand values including a final-control-quantity
demand value which is a demand value of a final control quantity of the synchronous rotating machine;

a first subtraction unit to subtract, from the final-control-quantity demand value input by the target operating condition
input unit, a final-control-quantity feedback value of the synchronous rotating machine to output a final-control-quantity
deviation;

a final-control-quantity control computation unit to accept, as an input, the final-control-quantity deviation from the first
subtraction unit, to output a field-current correction demand value;

an anticipatory computation unit to output a field-current anticipatory demand value based on the operating condition demand
values input by the target operating condition input unit;

an addition unit to add the field-current correction demand value and the field-current anticipatory demand value to output
a field-current setting value;

a second subtraction unit to subtract, from the field-current setting value, a value of field current flowing through the
field winding to output a field current deviation; and

a field-current regulation device to adjust the field current based on the field current deviation,
wherein the anticipatory computation unit includes:
a dependence characteristic data storage unit to store dependence characteristics which are predicted based on the results
of a no-load test of the synchronous rotating machine; and

a circuit calculation unit to perform a circuit calculation by using the dependence characteristics based on the operating
condition demand values input by the target operating condition input unit to output a field-current anticipatory demand value.

US Pat. No. 9,279,182

APPARATUS FOR FORMING METAL OXIDE FILM, METHOD FOR FORMING METAL OXIDE FILM, AND METAL OXIDE FILM

TOSHIBA MITSUBISHI-ELECTR...

1. A method for forming a metal oxide film, the method comprising:
forming a source solution comprising metal into a mist;
heating a substrate;
supplying the source solution formed into a mist onto a first main surface of the substrate through a first supply path;
supplying ozone onto the first main surface of the substrate; and
supplying hydrogen peroxide through a second path different from the first supply path onto the first main surface of the
substrate,

wherein the method further comprises, in the following order:
preliminarily preparing data showing a relationship among a molar ratio of an amount of the hydrogen peroxide to an amount
of the zinc in the source solution, a carrier concentration of the metal oxide film, and a mobility of the metal oxide film;

determining an amount of the hydrogen peroxide supplied with the data, and
supplying the determined amount of the hydrogen peroxide through the second path onto the first main surface of the substrate,
wherein
the substrate is arranged under atmospheric pressure,
the source solution is converted into a mist by an ultrasonic atomizer,
the metal is zinc, and
wherein the heating is performed at a temperature of 190 to 240° C.

US Pat. No. 9,444,286

UNINTERRUPTIBLE POWER SUPPLY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. An uninterruptible power supply system, comprising:
a plurality of uninterruptible power supply devices which are connected in parallel with respect to a load, and switch between
power supplies supplying power to said load depending on states of said power supplies;

a control unit controlling an operation of switching between said power supplies by said uninterruptible power supply devices;
and

a storage battery connected to the plurality of said uninterruptible power supply devices in common,
said uninterruptible power supply device having
a conversion unit converting AC power of an AC power supply into DC power,
a switching unit switching between the DC power converted by said conversion unit and DC power input from said storage battery,
and

an inversion unit inverting the DC power converted by said conversion unit or the DC power input from said storage battery
into AC power and supplying the power to said load,

said control unit deactivating said conversion unit which does not contribute to supplying a power amount required for said
load, of a plurality of said conversion units.

US Pat. No. 9,255,958

GROUND FAULT DETECTION CIRCUIT

TOSHIBA MITSUBISHI-ELECTR...

1. A ground fault detection circuit for detecting a ground fault in a plurality of loads each connected to a power supply
device, said ground fault detection circuit comprising:
an AC power supply; and
a plurality of resonance circuits connected between at least one current path formed of said plurality of loads and said AC
power supply,

each of said plurality of resonance circuits having a resonance frequency equal to a frequency of said AC power supply;
each of said plurality of loads being connected to one of said plurality of resonance circuits; and
the AC power supply applying a same signal to each of the plurality of resonance circuits.

US Pat. No. 9,252,600

CONNECTION APPARATUS FOR POWER CONVERTER

Toshiba Mitsubishi-Electr...

1. A connection apparatus for a power converter apparatus which comprises power converting units with power converting circuits
configured to convert direct-current power into alternating-current power, a lead-in board configured to receive alternating-current
power output from, the power converting units, and frames configured to mount therein the power converting units, the connection
apparatus comprising:
alternating-current output connecting units provided in the respective frames and configured to connect to output terminals
configured to output alternating-current power of the power converting units;

cables configured to electrically connect the alternating-current output connecting units in the respective frames to the
lead-in board;

a parallel, circuit configured to connect the cables in parallel; and
opening/closing units incorporated in the lead-in board and configured to open and close alternating-current power lines,
the alternating-current power lines connecting the power converting units to the parallel circuit.

US Pat. No. 9,236,769

CONTROL DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A control device in a power conversion device including a plurality of switching elements, said control device controlling
said plurality of switching elements,
a layout of said plurality of switching elements being different for each type of said power conversion device,
said control device comprising:
a signal generation circuit generating a plurality of control signals controlling said plurality of switching elements;
a plurality of output terminals for supplying said plurality of control signals to said plurality of switching elements; and
a switching circuit arranging said plurality of control signals in order in accordance with the type of said power conversion
device and supplying the plurality of control signals to said plurality of output terminals, wherein

said plurality of output terminals are grouped by a predetermined number of output terminals into a plurality of first groups,
and

said plurality of switching elements are grouped by said predetermined number of switching elements into a plurality of second
groups,

said control device further comprises:
a drive circuit provided corresponding to each of the second groups and driving each of the switching elements in a corresponding
one of the second groups; and

a multicore cable connecting said predetermined number of output terminals belonging to each of the first groups and the corresponding
drive circuit.

US Pat. No. 9,423,185

HEAT TRANSFER DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A heat transfer device transferring heat to a piping system through which a fluid flows, comprising:
a high heat conductive heat transfer block surrounding said piping system;
a heat pipe formed in said heat transfer block along an extension direction of said piping system; and
a heating unit applying heat to said heat pipe,
wherein said heat transfer block includes a plurality of divided blocks dividable along the extension direction of said piping
system, and

wherein the heat pipe includes an evacuated and decompressed vacuum space and a wick provided on an inner surface of the vacuum
space, the wick having capillary force.

US Pat. No. 9,153,953

FAULT DETECTION APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A connector that connects in parallel direct-current power supplies connected to an input side and connects the direct-current
power supplies to a circuit on a load side connected to an output side, the connector comprising:
open/close units configured to respectively open/close electric paths located between the direct-current power supplies and
a parallel connection point which connects the direct-current power supplies in parallel;

a reverse-current detector configured to detect a reverse current running through one of the electric paths from the output
side to the input side;

an abnormal current detector configured to detect an abnormal current of a current value that is higher or lower, by a predetermined
value or a predetermined ratio, than an average current value determined based on current values of currents running through
all of the electric paths; and

an opening unit configured to open the open/close unit which opens/closes the electric path where the reverse current is detected,
when the reverse current is detected by the reverse-current detector, and to open the open/close unit which opens/closes the
electric path where the abnormal current is detected, when the abnormal current is detected by the abnormal current detector.

US Pat. No. 9,459,310

INVERTER TEST APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. An inverter test apparatus for use in testing an inverter interconnected with an alternating-current power system, the
apparatus comprising:
a load simulation inverter configured to output alternating-current power; and
an alternating-current power controller configured to control the alternating-current power output from the load simulation
inverter to simulate an alternating-current load of the inverter including performing control to simulate at least one of
inductance, capacitance, or resistance, wherein the alternating-current power controller controls the alternating-current
power output from the load simulation inverter independent of an output from the inverter.

US Pat. No. 9,428,831

HEAT EQUALIZER

TOSHIBA MITSUBISHI-ELECTR...

1. A heat equalizer comprising:
a container structure including a heating block with a flow path formed so that a material to be heated flows in the flow
path, and an outer container in which a working fluid is held, respective upper ends of said heating block and said outer
container being joined to form a hollow portion between said heating block and said outer container;

a material feed pipe allowing an outside of said container structure and said heating block to communicate with each other;
and

heating means placed at a bottom of said outer container, wherein
said flow path includes a first flow path connected to said material feed pipe and extending in a horizontal direction, a
second flow path branching from said first flow path and extending in a vertical direction, and an opening formed by said
second flow path opening at an upper surface of said container structure,

at a bottom surface of said heating block, a plurality of depressions formed by said bottom surface depressed toward an inside
of said heating block and capable of receiving a vaporized working fluid are formed,

said second flow path is placed between said depressions adjacent to each other,
a heater housing tube having one end secured to said outer container and the other end immersed in the working fluid of liquid
state; and

a heater housed in said heater housing tube and having a heat generating portion, wherein
said heat generating portion is placed away from said one end of said heater housing tube that is secured to said outer container.

US Pat. No. 9,295,967

NITROGEN-FREE OZONE GENERATING UNIT

TOSHIBA MITSUBISHI-ELECTR...

1. A nitrogen-free ozone generating unit, comprising:
a nitrogen-free ozone generator comprising a photocatalytic material for generating ozone on a discharge surface and is configured
to generate an ozone gas;

an ozone power source supplying high voltage to said nitrogen-free ozone generator; and
a controller associated with said ozone generator,
wherein:
said controller comprises:
a flow rate detection/adjusting unit comprising a mass flow controller configured to control a raw-material-gas flow rate
supplied to said nitrogen-free ozone generator; and

a pressure detecting/adjusting unit comprising an auto pressure controller configured to automatically control an internal
pressure that is a pressure inside said nitrogen-free ozone generator;

said nitrogen-free ozone generating unit has an integrated structure of said nitrogen-free ozone generator, said ozone power
source, and said controller;

said nitrogen-free ozone generator further comprises:
a high-voltage terminal configured to receive said high voltage from said ozone power source;
a cooling medium inlet/outlet for supplying and discharging a low-temperature cooling medium having a temperature of 15° C.
or less that is obtained from outside;

a high voltage electrode to which said high voltage is applied via said high-voltage terminal and that has at least one primary
surface defined as said discharge surface;

a photocatalyst layer made of said photocatalytic material and provided on said discharge surface side of said high voltage
electrode;

a cooling path part provided in a vicinity of said high voltage electrode and configured to allow circulation of said cooling
medium supplied therein via said cooling medium inlet/outlet;

an accommodating part configured to accommodate therein said high voltage electrode, said photocatalyst layer, and said cooling
path, said cooling medium inlet/outlet being formed in a predetermined constituent surface constituting part of a peripheral
portion of said accommodating part, and said high-voltage terminal being provided to pass through said peripheral portion
of said accommodating part;

a heat insulating layer made of a heat insulating material and formed to cover at least said predetermined constituent surface
of said accommodating part, such that the heat insulating layer directly contacts said predetermined constituent surface;

a raw material gas inlet part for supplying a raw material gas from outside via said flow rate detection/adjusting means;
and

an ozone gas outlet part for outputting a generated ozone gas to outside via said pressure detecting/adjusting means;
said raw material gas inlet part and said ozone gas outlet part are formed in said predetermined constituent surface, and
said high-voltage terminal is formed to pass through said predetermined constituent surface; and

said heat insulating layer is formed to selectively cover and directly contact only said predetermined constituent surface.

US Pat. No. 9,657,880

HEATING DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A heating device comprising:
a heat transfer part which surrounds an object to be heated and transfers heat to said object, said heat transfer part being
of a high thermal conductivity and including a first heat transferring block and a second heat transferring block which surround
said object and a bottom surface of the first heat transferring block being in contact with a top surface of the second heat
transferring block;

a heating section within one of the heat transferring blocks configured to generate heat and heat said heat transferring blocks;
an inner cover disposed to cover an outer periphery of said heat transferring blocks; so as to form a first hollow space between
said inner cover and said heat transferring blocks, the first hollow space enclosing the heating section;

an outer cover disposed to cover an outer periphery of said inner cover so as to form a second hollow space between said outer
cover and said inner cover, the second hollow space enclosing the heating section,

said inner cover including a first inner cover which covers the outer periphery of said first heat transferring block and
is fixed to said first heat transferring block, and a second inner cover which covers the outer periphery of said second heat
transferring block and is fixed to said second heat transferring block, and

said outer cover including a first outer cover which covers the outer periphery of said first inner cover and is fixed to
said first inner cover, and a second outer cover which covers the outer periphery of said second inner cover and is fixed
to said second inner cover; and

a fixation means configured to detachably fix said first outer cover and said second outer cover.

US Pat. No. 9,460,133

DATA MANAGEMENT APPARATUS, DATA MANAGEMENT METHOD AND DATA MANAGEMENT PROGRAM

TOSHIBA MITSUBISHI-ELECTR...

1. A data management apparatus comprising:
an arrangement pattern sampling data generator for generating arrangement pattern sampling data in which process data acquired
from a monitoring target and including a chronological change, and an elapsed time from a reference point of time to a point
of time of the chronological change are associated with each other;

a bit pattern sampling data generator for, each time process data are acquired from the monitoring target, generating bit
pattern sampling data in which a flag indicating a presence or an absence of the chronological change in the process data
acquired from the monitoring target, and the process data acquired from the monitoring target and including the chronological
change are associated with each other;

a storage controller for storing any one of the bit pattern sampling data and the arrangement pattern sampling data, which
requires a smaller storage capacity, into a storage;

a plant control system coupled with the storage and configured to retrieve any one of the stored bit pattern sampling data
and the stored arrangement pattern sampling data from the storage to control a plant including the monitoring target.

US Pat. No. 9,154,049

POWER CONVERSION APPARATUS HAVING A THREE-LEVEL CONVERTER THAT CONVERTS AC VOLTAGE TO DC VOLTAGE HAVING THREE LEVELS

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion apparatus comprising:
a three-level converter converting an AC voltage of an AC power supply into a DC voltage having three levels corresponding
to first to third potentials, said three-level converter including

first to third input terminals,
an output terminal outputting said DC voltage,
said second input terminal being supplied with an intermediate potential of said first to third potentials,
first and second switching semiconductor devices connected in series between said first input terminal and said output terminal,
the first switching semiconductor device connected between the first input terminal and the second switching semiconductor
device and the second switching semiconductor device connected between the first switching semiconductor device and the output
terminal,

first and second freewheeling diodes connected in series between said first input terminal and said output terminal and in
a direction opposite to a direction in which a current flows through said first and second switching semiconductor devices,
the first freewheeling diode connected between the first input terminal and the second freewheeling diode and the second freewheeling
diode connected between the first freewheeling diode and the output terminal,

a first coupling diode having an anode connected to said second input terminal and a cathode connected to a connection node
between said first switching semiconductor device and said second switching semiconductor device, and connected to a connection
node between said first freewheeling diode and said second freewheeling diode,

third and fourth switching semiconductor devices connected in series between said output terminal and said third input terminal,
the third switching semiconductor device connected between the output terminal and the fourth switching semiconductor device
and the fourth switching semiconductor device connected between the third switching semiconductor device and the third input
terminal,

third and fourth freewheeling diodes connected in series between said output terminal and said third input terminal and in
a direction opposite to a direction in which a current flows through said third and fourth switching semiconductor devices,
the third freewheeling diode connected between the output terminal and the fourth freewheeling diode and the fourth freewheeling
diode connected between the third freewheeling diode and the third input terminal, and

a second coupling diode having a cathode connected to said second input terminal and an anode connected to a connection node
between said third switching semiconductor device and said fourth switching semiconductor device, and connected to a connection
node between said third freewheeling diode and said fourth freewheeling diode; and

a control circuit controlling said first to fourth switching semiconductor devices to be switched ON and OFF, wherein
when switching control signals of said first and second switching semiconductor devices from OFF-control to ON-control, said
control circuit controls said first switching semiconductor device to be ON after a lapse of a turn-ON time from when a control
voltage is applied to said second switching semiconductor device, and

when switching the control signals of said first and second switching semiconductor devices from ON-control to OFF-control,
said control circuit controls the control signal of said second switching semiconductor device to be OFF after a lapse of
a turn-OFF time from when a control voltage is applied to said first switching semiconductor device.

US Pat. No. 9,092,026

REMOTE MONITORING APPARATUS

Toshiba Mitsubishi-Electr...

1. A remote monitoring apparatus, comprising:
a plurality of environment sensors which measure placement environment of devices provided inside control equipment as an
object to be monitored, a plurality of physical sensors which measure physical quantities including voltages of the devices
provided inside the control equipment as the object to be monitored, and a wireless communication system which is capable
of transmitting data measured by the environment sensors and the physical sensors to outside of the control equipment; and

a monitoring device comprising another wireless communication system which is provided in a position remote from the control
equipment, and is capable of taking in the data measured by the sensors and obtained through the wireless communication system,
wherein the monitoring device monitors normality of environment of the control equipment based on:

a correlation between changes in the measured data for the placement environment and the measured data for the physical quantities
including the voltages of the devices provided inside the control equipment; and

a pre-stored knowledge base concerning environment standard;
wherein the knowledge base is obtained by determining a degree of influence on the object to be monitored in the placement
environment based on a value which agrees with both a result of an experiment performed in advance by providing environment
noise to typical control equipment, the result of the experiment being expressed numerically, and a result of a simulation
of propagation of the environmental noise.

US Pat. No. 9,615,440

POWER SUPPLY APPARATUS OUTPUTTING ALTERNATING-CURRENT VOLTAGE TO PLASMA GENERATOR

Toshiba Mitsubishi-Electr...

1. A power supply apparatus that outputs an alternating-current voltage to a plasma generator being a capacitive load including
a plurality of discharge cells connected to one another, said power supply apparatus comprising:
an inverter that converts direct-current electric power to alternating-current electric power;
a current-limiting reactor, which is located on an output side of said inverter, consisting of a single winding wire and regulates
a short-circuit current;

a controller that controls an action of said inverter; and
a detection unit that is located on the output side of said inverter and detects a short circuit,
wherein said controller causes said inverter to stop when said detection unit detects said short circuit.

US Pat. No. 9,574,271

METHOD FOR FORMING METAL OXIDE FILM, METAL OXIDE FILM AND APPARATUS FOR FORMING METAL OXIDE FILM

TOSHIBA MITSUBISHI-ELECTR...

1. A method of forming a metal oxide film with a desired mobility, the method comprising:
supplying a misted solution comprising a metallic element and an amount of ethylenediamine sufficient to provide the desired
mobility onto a first main surface of a substrate while heating the substrate,

wherein
the amount of ethylenediamine is determined from a relationship showing change in mobility of the metal oxide film with a
changing ethylenediamine amount but no significant change in carrier concentration of the metal oxide film with the changing
ethylenediamine amount.

US Pat. No. 9,352,939

CRANE OPERATION ASSISTANCE SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A crane operation assistance system for assisting operation of a crane including a movable body capable of hoisting a container
and moving in a horizontal direction, the system comprising:
a scanning-type distance meter mounted on the movable body, the scanning-type distance meter being capable of measuring a
distance and an angle between the scanning-type distance meter and an object under a range of movement of the movable body;
and

a controller that is programmed to:
lower the container into an imaginary containers presence zone that includes a container storage space able to accommodate
the container;

make, based on information measured by the scanning-type distance meter, object height distribution data that is data indicating
a distribution of heights of objects under the range of movement of the movable body; and

revise, if a blind spot for the scanning-type distance meter has occurred in the made object height distribution data, data
of object heights in a zone of the blind spot,

wherein the revised data of the object heights is based on data of an object height at a point that is farthest from the scanning-type
distance meter in the imaginary containers presence zone having an overlap with the zone of the blind spot.

US Pat. No. 9,186,647

OZONE GAS GENERATION UNIT AND OZONE GAS SUPPLY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. An ozone generation unit, comprising:
an ozone generator for generating an ozone gas;
an ozone power source for controlling power to be supplied to the ozone generator;
a controller associated with the ozone generator;
a raw gas supply port for supplying a raw gas from the outside to the ozone generator;
an ozone gas output port for outputting, to the outside, the ozone gas obtained from the ozone generator through at least
part of the controller;

cooling water inlet/outlet ports for supplying and discharging a cooling water obtained from the outside to the ozone generator;
and

a gas pipe integrated block,
wherein
the ozone generation unit is formed as an integrated structure in which the ozone generator, the ozone power source, the controller,
the raw gas supply port, the ozone gas output port, and the cooling water inlet/outlet ports are assembled together,

the controller comprises:
a flow-rate-detector/flow-rate-adjustor comprising a mass flow controller (MFC) for controlling a flow rate of the raw gas
inputted to the ozone generator;

a gas filter for processing the ozone gas outputted from the ozone generator to remove an impurity and a foreign substance;
a pressure-detector/pressure-adjustor comprising an automatic pressure controller (APC) for automatically controlling internal
pressure of the ozone generator; and

ozone concentration detector comprising an ozone concentration meter for detecting an ozone concentration value of the ozone
gas outputted from the ozone generator,

each of the ozone generator, the flow-rate-detector/flow-rate-adjustor, the gas filter, the pressure-detector/pressure-adjustor,
the ozone concentration detector, the raw gas supply port, the ozone gas output port, and the cooling water inlet/outlet ports
is mounted to the gas pipe integrated block in close contact,

the gas pipe integrated block has a three-dimensional structure,
the flow-rate-detector/flow-rate-adjustor, the gas filter, the pressure-detector/pressure-adjustor, and the ozone concentration
detector are arranged on one or more surfaces of the gas pipe integrated block,

the gas pipe integrated block has a plurality of internal pipe paths,
the plurality of internal pipe paths are connected to the ozone generator, the flow-rate-detector/flow-rate-adjustor, the
gas filter, the pressure-detector/pressure-adjustor, the ozone concentration detector, the raw gas supply port, and the ozone
gas output port, to form a raw gas input pipe path and an ozone gas output pipe path,

the raw gas input pipe path extends from the raw gas supply port through the flow-rate-detector/flow-rate-adjustor to the
ozone generator, and

the ozone gas output pipe path extends from the ozone generator through the gas filter, the ozone concentration detector,
and the pressure-detector/pressure-adjustor, to the ozone gas output port.

US Pat. No. 9,093,861

POWER CONVERSION SYSTEM AND UNINTERRUPTIBLE POWER SUPPLY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion system comprising:
a plurality of power conversion devices connected in parallel between a power supply and a load, said plurality of power conversion
devices each converting first power supplied from said power supply into second power and supplying the second power to said
load; and

circuitry configured to select a required number of power conversion devices for converting said first power into said second
power from said plurality of power conversion devices, to cause each of selected power conversion devices to be operated and
to cause each of remaining power conversion devices to be stopped,

said circuitry changing the power conversion devices to be operated in a predetermined cycle such that said plurality of power
conversion devices are identical in operation time to one another and operate in a predetermined sequential order.

US Pat. No. 9,142,940

SWITCHBOARD AND COOLING METHOD THEREOF

Toshiba Mitsubishi-Electr...

1. A switchboard comprising:
boards each including an opening portion which is provided in a ceiling surface and configured to exhaust heat, and an intake
portion which is provided in a lower portion and configured to take in cooling air;

a fan provided to cover the opening portion of a board of the boards and configured to exhaust air in a horizontal direction
to cool the inside of the board; and

a duct configured to supply the cooling air from an opening portion of a board not provided with the fan to the inside of
the board provided with the fan.

US Pat. No. 9,511,401

ENERGY-SAVING DEVICE FOR ROLLING PLANT

TOSHIBA MITSUBISHI-ELECTR...

1. An energy-saving device for a rolling plant, comprising:
a first rolling stand for rolling the material being rolled of a metallic material conveyed on a rolling line;
a second rolling stand arranged on the downstream side of the first rolling stand;
a third rolling stand arranged on the downstream side of the second rolling stand;
a first inter-stand cooling system which is provided between the first rolling stand and the second rolling stand to pour
cooling water onto the conveyed material being rolled;

a second inter-stand cooling system which is provided between the second rolling stand and the third rolling stand to pour
cooling water onto the conveyed material being rolled; and

a controller configured to:
change an operating mode of the rolling plant from a state in which the second rolling stand rolls the material being rolled
and a state in which the second rolling stand does not roll the material being rolled according to a product specification
of the material being rolled; and

prohibit the first inter-stand cooling system from pouring cooling water and permit the second inter-stand cooling system
to pour cooling water in a state in which the first rolling stand and the third rolling stand roll the material being rolled
and the second rolling stand does not roll the material being rolled.

US Pat. No. 9,257,829

GROUNDING APPARATUS

Toshiba Mitsubishi-Electr...

1. A grounding apparatus comprising:
a DC power supply;
a power conditioner configured to receive DC power of the DC power supply through a DC positive bus and a negative bus and
to convert the DC power to AC power;

an AC power system configured to supply the AC power from the power conditioner through an insulated transformer;
a circuit breaker connected to the DC positive bus and the DC negative bus and configured to open a current path between the
DC power supply and the power conditioner;

a ground line connecting the DC positive bus or DC negative bus which is provided between the power conditioner and the circuit
breaker, to ground;

a current detector configured to detect a current flowing in the ground line;
a fuse inserted in series in a part of the ground line and configured not to melt when the current flowing in the ground line
is less than or equal to a current detection level, not destroying the current detector and causing an incomplete grounding
fault; and

a determination device configured to generate an alarm when the current detected by the current detector has a second protection
setting value which is smaller than a protection setting value of the fuse.

US Pat. No. 9,099,937

POWER CONVERTER CAPABLE OF OUTPUTTING A PLURALITY OF DIFFERENT LEVELS OF VOLTAGES

TOSHIBA MITSUBISHI-ELECTR...

1. A power converter comprising:
a group of serial three-level inverters including 2n three-level inverters each capable of outputting three levels of voltages connected in series, n being an integer of 2 or
more; and

a switch circuit for selecting an output from either one of two of said three-level inverters in said group of serial three-level
inverters,

said three-level inverters each including
a first switch element and a second switch element connected in series,
a first charge storage element and a second charge storage element connected in series, and
a third switch element for connecting a first node between said first switch element and said second switch element to a second
node between said first charge storage element and said second charge storage element,

said first switch element and said second switch element being connected in parallel to said first charge storage element
and said second charge storage element,

said three-level inverter being configured to be able to output three levels of voltages by a combination of on states and
off states of said first switch element to said third switch element,

said group of serial three-level inverters including 2n said three-level inverters connected in series by repeated connection of a fourth node between said second switch element
and said second charge storage element in one of said three-level inverters to a fifth node between said first switch element
and said first charge storage element in another of said three-level inverters adjacent to said one of said three-level inverters,

2n-1 said switch circuits being connected to be able to select an output from either one of the two adjacent said three-level inverters
in said group of serial three-level inverters,

when there are two or more said switch circuits, said switch circuit in a following stage being connected to be able to select
an output from either one of two said switch circuits connected in a previous stage, thereby providing one output.

US Pat. No. 9,056,342

ROLLED MATERIAL COOLING CONTROL APPARATUS, ROLLED MATERIAL COOLING CONTROL METHOD, AND ROLLED MATERIAL COOLING CONTROL PROGRAM

TOSHIBA MITSUBISHI-ELECTR...

1. A rolling material cooling control apparatus comprising:
a detail thermal model memory having stored detail thermal models each comprising a mathematical formula using parameters
describing a temperature variation of a rolling material in a prescribed cooling interval;

an influence coefficient calculator configured to take a detail thermal model stored in the detail thermal model memory as
a basis to calculate an influence coefficient as necessary for a control of temperature variation of the rolling material;

a simple cooling pattern calculator configured to take the influence coefficient calculated by the influence coefficient calculator
as a basis to make calculation of a simple cooling pattern in a simplified form of a preferable detail cooling pattern being
necessary for the rolling material to have a preferable material quality;

a detail cooling pattern calculator configured to take a combination of the simple cooling pattern given by calculation at
the simple cooling pattern calculator and the detail thermal model stored in the detail thermal model memory as a basis to
make calculation of a detail cooling pattern of the rolling material in the prescribed cooling interval; and

a cooling controller configured to take the detail cooling pattern given by calculation at the detail cooling pattern calculator
as a basis to control a cooling of the rolling material.

US Pat. No. 9,750,121

POWER SUPPLY APPARATUS

Toshiba Mitsubishi-Electr...

1. A power supply apparatus that outputs an alternating-current voltage to a plasma generator being a capacitive load including
a plurality of discharge cells connected to one another, said power supply apparatus comprising:
an inverter that converts direct-current electric power to alternating-current electric power; and
a transformer located between said inverter and said plasma generator, wherein
a transformer inductance value obtained by combining a magnetizing inductance and a leakage inductance is set such that said
transformer inductance value corresponds to a capacitance value which is a load of said plasma generator,

said power supply apparatus is operated at a working frequency within a resonance frequency range which is obtained by a resonance
frequency expression defined by combining said transformer inductance value and said capacitance value, and

said transformer is set such that said magnetizing inductance is more than five times as great as said leakage inductance,
and said transformer is set such that a calculated inductance value calculated by applying said capacitance value and said
working frequency into said resonance frequency expression is given as said transformer inductance value.

US Pat. No. 9,154,000

UNINTERRUPTIBLE POWER SUPPLY APPARATUS INCLUDING A CONTROL CIRCUIT THAT EXECUTES A FIRST MODE WHEN SUPPLY OF A FIRST AC ELECTRIC POWER FROM A COMMERCIAL AC POWER SUPPLY IS RESUMED AT A TIME OF DISCHARGE END

TOSHIBA MITSUBISHI-ELECTR...

1. An uninterruptible power supply apparatus, comprising:
a converter converting first AC electric power supplied from a commercial AC power supply to DC electric power;
an inverter converting the DC electric power supplied from said converter or a power storage device to second AC electric
power having a commercial frequency;

a DC power supply generating a DC power supply voltage based on said second AC electric power;
a first switch having one terminal receiving said first AC electric power and the other terminal connected to a load;
a second switch having one terminal receiving said second AC electric power and the other terminal connected to said load;
and

a control circuit driven by said DC power supply voltage,
said control circuit having:
a first mode in which said first switch is brought out of conduction, said second switch is brought into conduction, and said
converter and said inverter are operated to supply said second AC electric power to said load;

a second mode in which said first switch is brought out of conduction, said second switch is brought into conduction, operation
of said converter is stopped, and said inverter is operated to supply said second AC electric power to said load;

a third mode in which said first and second switches are brought out of conduction to stop electric power supply to said load,
and the operation of said converter is stopped and said inverter is operated to supply said second AC electric power to said
DC power supply; and

a fourth mode in which said first switch is brought into conduction and said second switch is brought out of conduction to
supply said first AC electric power to said load,

said control circuit
executing said first mode in a normal state in which said first AC electric power is supplied from said commercial AC power
supply;

executing said second mode at the time of power failure in which supply of said first AC electric power from said commercial
AC power supply is stopped;

executing said third mode at the time of discharge end in which an output voltage of said power storage device decreases to
a predetermined voltage during said power failure; and

executing said fourth mode, and thereafter, executing said first mode when supply of said first AC electric power from said
commercial AC power supply is resumed at the time of said discharge end.

US Pat. No. 9,141,122

PHOTOVOLTAIC POWER GENERATION SYSTEM

Toshiba Mitsubishi-Electr...

1. A photovoltaic power generation system comprising:
a photovoltaic array including photovoltaic modules;
a control apparatus configured to display output characteristics of the photovoltaic array and power generating conditions
of the photovoltaic array in synchronization; and

a curve trace apparatus that traces a P-V characteristic diagram from direct-current power (P) calculated based on a direct-current
voltage detection value (V) and a direct current detection value (I), and also traces power generating conditions and an alternating-current
power detection value on the P-V characteristic diagram.

US Pat. No. 9,114,987

OZONE GENERATION SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. An ozone generation system comprising:
an oxygen supply port;
a nitrogen supply port;
an ozone generation apparatus that generates ozone from an inflowing raw material gas; and
a gas flow rate adjustment apparatus, wherein:
oxygen supplied from the oxygen supply port and nitrogen supplied from the nitrogen supply port flow into the gas flow rate
adjustment apparatus; and

the gas flow rate adjustment apparatus adjusts the flow rates of the oxygen and the nitrogen; and
after the adjustment, the gas flow rate adjustment apparatus outputs the oxygen and the nitrogen to serve as the raw material
gas to the ozone generation apparatus;

wherein the gas flow rate adjustment apparatus comprises:
a first oxygen flow rate adjustment part connected to the oxygen supply port and configured to adjust the flow rate of the
oxygen from the oxygen supply port;

a second oxygen flow rate adjustment part connected to the oxygen supply port and configured to adjust the flow rate of the
oxygen from the oxygen supply port;

a nitrogen flow rate adjustment part connected to the nitrogen supply port and configured to adjust the flow rate of the nitrogen
from the nitrogen supply port; and

a mixed gas flow rate adjustment part configured to adjust the flow rate of a first mixed gas comprising the oxygen outputted
from the second oxygen flow rate adjustment part and the nitrogen outputted from the nitrogen flow rate adjustment part;

wherein the gas flow rate adjustment apparatus is configured to output a second mixed gas that serves as the raw material
gas to the ozone generation apparatus; and

the second mixed gas comprising the oxygen outputted from the first oxygen flow rate adjustment part and the first mixed gas
outputted from the mixed gas flow rate adjustment part,

wherein the gas flow rate adjustment apparatus is configured to generate the second mixed gas such that the second mixed gas
comprises the nitrogen added to the oxygen with the rate of addition of the nitrogen in a range of more than 0 PPM and not
more than 100 PPM, by using the first oxygen flow rate adjustment part, the second oxygen flow rate adjustment part, the nitrogen
flow rate adjustment part, and the mixed gas flow rate adjustment part.

US Pat. No. 9,056,300

OZONE GAS GENERATION UNIT AND OZONE GAS SUPPLY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. An ozone generation unit having a front surface and a back surface, comprising:
an ozone generator for generating an ozone gas, said ozone generator having an upper portion and a back portion, said back
portion having a side surface;

an ozone power source for controlling power to be supplied to said ozone generator;
a controller comprising at least two of:
a flow-rate-detector/flow-rate-adjuster comprising a mass flow controller (MFC) for controlling a flow rate of a raw gas that
is inputted to said ozone generator;

a gas filter for processing ozone gas outputted from said ozone generator so as to remove an impurity and a foreign substance
therefrom;

a pressure-detector/pressure-adjuster comprising an automatic pressure controller (APC) for automatically controlling internal
pressure in said ozone generator; and

an ozone concentration detector comprising an ozone concentration meter for detecting an ozone concentration value of the
ozone gas outputted from said ozone generator;

a raw gas supply port for supplying the raw gas from outside to said ozone generator;
an ozone gas output port for outputting, to the outside, ozone gas obtained from said ozone generator through at least part
of said controller;

cooling water inlet/outlet ports for supplying and discharging a cooling water obtained from the outside to said ozone generator;
and

a control panel having a front surface and a back surface,
wherein:
said control panel is arranged at said front surface of said ozone generation unit;
said ozone power source is arranged on said back surface of said control panel;
said ozone generator is arranged at the back of said ozone power source;
said flow-rate-detector/flow-rate-adjustor is arranged between said raw gas supply port and said ozone generator;
said raw gas supply port, said flow-rate-detector/flow-rate-adjustor, said gas filter, said pressure-detector/pressure adjuster,
and said ozone concentration detector are arranged at said back portion and said upper portion, or at said side surface, of
said ozone generator;

said raw gas supply port, said ozone gas output port, and said cooling water inlet/outlet ports are arranged so as to be connectable
to said back surface of said ozone generation unit; and

said ozone generation unit is formed as an integrated structure in which said ozone generator, said ozone power source, said
controller, said raw gas supply port, said ozone gas output port, and said cooling water inlet/outlet ports are assembled
together.

US Pat. No. 9,242,283

CONTROL APPARATUS OF ROLLING MILL

TOSHIBA MITSUBISHI-ELECTR...

1. A control apparatus of a rolling mill for reducing periodic disturbances which are caused mainly by roll eccentricity,
in gauge control during rolling of a metal material, comprising:
a load detecting device for detecting a load in a kiss-roll condition and a rolling load;
a load top/bottom distribution device which distributes loads detected by the load detecting device as a top side load and
a bottom side load at a prescribed ratio;

a load top/bottom variation identification device which identifies load variation components occurring in connection with
a rotational position of rolls from the top side load and the bottom side load which are distributed by the load top/bottom
distribution device;

a top/bottom identified load variation storage device which stores, for each rotational position of rolls, a top side variation
component and a bottom side variation component of the load in a kiss-roll condition which are identified by the load top/bottom
variation identification device;

a manipulated variable computation device which computes a roll gap instruction value responding to each rotational position
of rolls on the basis of the top side variation component and the bottom side variation component of the rolling load which
are identified by the load top/bottom variation identification device, as well as the top side variation component and the
bottom side variation component of the load in a kiss-roll condition which are stored in the top/bottom identified load variation
storage device, in such a manner as to reduce plate thickness variations of a metal material which is being rolled; and

a roll gap manipulation device which manipulates a roll gap on the basis of the roll gap instruction value computed by the
manipulated variable computation device,

wherein before the start of the rolling of the metal material, on the basis of the top side variation component and the bottom
side variation component of the load in a kiss-roll condition which are identified by the load top/bottom variation identification
device, the manipulated variable computation device computes a roll gap instruction value responding to each rotational position
of rolls so that variation components of the load in a kiss-roll condition occurring in connection with the rotational position
of rolls decrease, and causes the roll gap manipulation device to manipulate the roll gap,

wherein after the control by the manipulated variable computation device is performed in a kiss-roll condition for a prescribed
period of time, the top/bottom identified load variation storage device stores, for each rotational position of rolls, the
top side variation component and the bottom side variation component of the load in a kiss-roll condition which are identified
by the load top/bottom variation identification device, and

wherein the load top/bottom variation identification device comprises:
a deviation computation device which extracts load variation components occurring in connection with the rotational position
of rolls from the top side load and the bottom side load which are distributed by the load top/bottom distribution device;
and

an adder which adds, for each rotational position of rolls, the top side variation component and the bottom side variation
component which are extracted by the deviation computation device, and

in a case where variations of a value of the adder fall in a prescribed range while the control by the manipulated variable
computation device is being performed in a kiss-roll condition, the top/bottom identified load variation storage device stores
the value of the adder.

US Pat. No. 9,712,070

POWER CONVERSION DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion device which performs power conversion between input terminals of multi-phase AC and output terminals
of multi-phase AC, comprising:
a voltage-transformer device including primary windings connected to the input terminals and secondary windings comprising
pluralities of single-phase open windings that are insulated to each other;

a plurality of converter cells including switching elements, each converter cell of which input ends are connected to both
ends of each single-phase open winding, the converter cells' respective input ends are connected in mutually parallel fashion
to the input terminal of each phase through the voltage-transformer device, and the converter cells' respective output ends
are connected in mutually serial fashion to the output terminal of each phase, said converter cells each performing conversion
between a single-phase AC and another single-phase AC; and

a control circuit for controlling ON/OFF of the switching elements, the control circuit being configured to control a DC bus
voltage in each of the converter cells to be evenly balanced to each other;

wherein the converter cells each comprise: a capacitor series connection; a converter that converts a single-phase AC voltage
from the input ends into a three or more-level DC voltage and outputs it to the capacitor series connection; and an inverter
that converts a DC voltage from the capacitor series connection into a single-phase AC voltage and outputs it to the output
ends;

wherein the control circuit is configured to:
control a DC bus voltage that is a voltage of the capacitor series connection in each of the converter cells, to have a predetermined
bus-voltage command value,

control an average value of the DC bus voltages of the converter cells connected to mutually different phases of the output
terminals, and

control an input-current active component of the primary windings of the voltage-transformer device so that the average value
becomes the predetermined bus-voltage command value.

US Pat. No. 9,077,201

UNINTERRUPTIBLE POWER SUPPLY DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. An uninterruptible power supply device comprising:
a converter that converts first ac power from a commercial ac power supply into first dc power;
an electric double-layer capacitor that stores the first dc power;
an inverter that converts the first dc power from said converter and said electric double-layer capacitor into second ac power;
a rectifier circuit that converts said second ac power into second dc power; and
a charging circuit that supplies output power of said rectifier circuit to said electric double-layer capacitor at a first
startup of said inverter, and that selectively supplies output power of one of said converter and said rectifier circuit to
said electric double-layer capacitor at second and subsequent startups of said inverter,

wherein at the second and subsequent startups of said inverter, said charging circuit supplies the output power of said rectifier
circuit to said electric double-layer capacitor in a first case when a charge level of said electric double-layer capacitor
is lower than a predetermined threshold level, and supplies the output power of said converter to said electric double-layer
capacitor in a second case when the charge level of said electric double-layer capacitor is higher than said predetermined
threshold level.

US Pat. No. 9,067,789

NITROGEN-FREE OZONE GENERATION UNIT AND OZONE GAS SUPPLY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

6. An ozone gas supply system that supplies, to a plurality of ozone treatment apparatuses, an ozone gas having been set to
a predetermined supply flow rate and a predetermined concentration, said ozone gas supply system including
a plurality of nitrogen-free ozone generation units, each of said plurality of ozone generation units including the nitrogen-free
ozone generation unit that supplies, to an ozone treatment apparatus, an ozone gas having been set to a predetermined supply
flow rate and a predetermined concentration,

said nitrogen-free ozone generation unit comprising:
a nitrogen-free ozone generator for generating an ozone gas, in which a photocatalytic material for generating ozone is applied
to a discharge surface;

an ozone power source for controlling power that is supplied to said nitrogen-free ozone generator;
a controller associated with said ozone generator, said controller including
a flow-rate-detector/flow-rate-adjuster including a mass flow controller (MFC) for controlling a flow rate (Q) of a raw material
gas that is inputted to said nitrogen-free ozone generator,

a gas filter for processing an ozone gas outputted from said nitrogen-free ozone generator so as to remove an impurity and
a foreign substance therefrom,

a pressure-detector/pressure-adjuster including an automatic pressure controller (APC) for automatically controlling internal
pressure that is pressure within said nitrogen-free ozone generator, and

an ozone concentration detector including an ozone concentration meter for detecting an ozone concentration value of the ozone
gas outputted from said nitrogen-free ozone generator;

a raw material gas supply port for supplying the raw material gas from outside to said nitrogen-free ozone generator;
an ozone gas output port for outputting, to the outside, an ozone gas obtained from said nitrogen-free ozone generator through
at least part of said controller; and

cooling water inlet/outlet ports for supplying cooling water obtained from the outside to said nitrogen-free ozone generator
and discharging said cooling water from said nitrogen-free ozone generator,

said nitrogen-free ozone generation unit comprising:
a control panel having a front surface and a back surface, wherein
said control panel is arranged at a front surface of said nitrogen-free ozone generation unit;
said ozone power source is arranged on said back surface of said control panel;
said ozone generator is arranged at the back of said ozone power source so as to arrange said raw material gas supply port,
said ozone gas output port and said cooling water inlet/outlet ports in a back surface side of said nitrogen-free ozone generation
unit;

said raw material gas supply port, said flow-rate-detector/flow-rate-adjuster connected to said ozone gas output port, said
gas filter, said pressure-detector/pressure adjuster and said ozone concentration detector are arranged at a back portion
and an upper portion, or at a side surface of said back portion, of said ozone generator;

said raw material gas supply port, said ozone gas output port, and said cooling water inlet/outlet ports are arranged so as
to be connectable to said back surface of said nitrogen-free ozone generation unit, and

said nitrogen-free ozone generation unit being formed as an integrated structure in which said nitrogen-free ozone generator,
said ozone power source, said controller, said raw material gas supply port, said ozone gas output port, and said cooling
water inlet/outlet ports are assembled together,

said nitrogen-free ozone generation unit further comprising:
a gas pipe integrated block to which each of said nitrogen-free ozone generator, said flow-rate-detector/flow-rate-adjuster,
said gas filter, said pressure-detector/pressure-adjuster, said ozone concentration detector, said raw material gas supply
port, said ozone gas output port, and said cooling water inlet/outlet ports is mounted in close contact, wherein

said gas pipe integrated block has a plurality of internal pipe paths,
said plurality of internal pipe paths are connected to said ozone generator, said flow-rate-detector/flow-rate-adjuster, said
gas filter, said pressure-detector/pressure-adjuster, said ozone concentration detector, said raw material gas supply port,
and said ozone gas output port, to thereby form a raw material gas input pipe path and an ozone gas output pipe path, said
raw material gas input pipe path extends from said raw material gas supply port through said flow-rate-detector/flow-rate-adjuster
to said nitrogen-free ozone gas generator, and said ozone gas output pipe path extends from said nitrogen-free ozone generator
through said gas filter, said ozone concentration detector, and said pressure-detector/pressure-adjuster, to said ozone gas
output port,

said ozone gas supply system further comprising:
an ozone gas output flow rate management unit configured to receive a plurality of ozone gas outputs from a plurality of said
nitrogen-free ozone generators in said plurality of nitrogen-free ozone generation units, and capable of performing an ozone
gas output flow rate control for selectively outputting one or a combination of two or more of said plurality of ozone gas
outputs to any of said plurality of ozone treatment apparatuses by performing an opening/closing operation on a plurality
of ozone gas control valves provided in said ozone gas output flow rate management unit; and

an ozone gas output flow rate management unit control part for, based on a process ozone gas event signal supplied from said
plurality of ozone treatment apparatuses, controlling said ozone gas output of each of said plurality of nitrogen-free ozone
generation units and causing said ozone gas output flow rate management unit to control said ozone gas output flow rate.

US Pat. No. 9,343,994

POWER CONVERSION APPARATUS HAVING TWO SECONDARY WINDING GROUPS

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion apparatus comprising:
a three-phase transformer interconnected to a three-phase power system;
said three-phase transformer including:
a primary winding group that receives three-phase AC electric power of said three-phase electric power system;
a first secondary winding group and a second secondary winding group that receive the three-phase AC electric power transferred
from said primary winding group;

first to third iron cores; and
a first converter group and a second converter group provided for said first and second secondary winding groups, respectively,
said primary winding group having first to third primary windings,
said first secondary winding group having a first neutral point, and having first to third secondary windings having respective
one ends star-connected at said first neutral point,

said second secondary winding group having a second neutral point, and having fourth to sixth secondary windings having respective
one ends star-connected at said second neutral point,

said first neutral point of said first secondary winding group and said second neutral point of said second secondary winding
group being connected to each other,

said first primary winding, said first secondary winding, and said fourth secondary winding being wound around said first
iron core,

said second primary winding, said second secondary winding, and said fifth secondary winding being wound around said second
iron core,

said third primary winding, said third secondary winding, and said sixth secondary winding being wound around said third iron
core,

said first converter group having first to third converter arms having respective one ends connected to other ends of said
first to third secondary windings,

said second converter group having fourth to sixth converter arms having respective one ends connected to other ends of said
fourth to sixth secondary windings,

said three-phase transformer further including
a positive-side DC output terminal connected with other ends of said first to third converter arms;
a negative-side DC output terminal connected with other ends of said fourth to sixth converter arms; and
a control circuit controlling a DC voltage applied between said positive-side DC output terminal and said negative-side DC
output terminal by adjusting a voltage of each of said first to sixth converter arms.

US Pat. No. 9,337,750

POWER CONVERSION APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion apparatus to be applied to a generation system that interconnects with an alternating current power
system, the power conversion apparatus comprising:
an inverter circuit including a switching element configured to convert a direct current power into an alternating current
power;

a system voltage measurement unit configured to measure a system voltage of the alternating current power system;
a voltage drop detector configured to detect a voltage drop of the alternating current power system, based on the system voltage
measured by the system voltage measurement unit;

a carrier wave generator configured to generate a carrier wave;
a carrier wave frequency modulator configured to increase a frequency of the carrier wave generated by the carrier wave generator
such that a ripple of a current output from the inverter circuit does not exceed a setting value of an overcurrent relay provided
on an output side of the inverter circuit, when the voltage drop is detected by the voltage drop detector;

a signal wave generator configured to generate a signal wave to control the alternating current power output from the inverter
circuit;

a gate signal generator configured to compare the carrier wave generated by the carrier wave generator with the signal wave
generated by the signal wave generator, and to generate a gate signal to drive the switching element; and

a power conversion controller configured to perform power conversion control of the inverter circuit by pulse width modulation,
based on the gate signal generated by the gate signal generator.

US Pat. No. 9,509,229

POWER SUPPLY APPARATUS INCLUDING POWER CONVERSION CIRCUIT CONTROLLED BY PWM CONTROL CIRCUIT

TOSHIBA MITSUBISHI-ELECTR...

1. A power supply apparatus comprising:
a power conversion circuit including first to third arms connected to first to third alternating current lines, respectively;
a filter disposed between said first to third alternating current lines and said power conversion circuit; and
a PWM control circuit for controlling said power conversion circuit in a pulse width modulation method,
said PWM control circuit including
a first voltage command value generation circuit generating first to third voltage command values corresponding to said first
to third alternating current lines, respectively, in voltage;

a first carrier wave signal generation circuit generating first to third carrier wave signals corresponding to said first
to third voltage command values, respectively;

a first comparator comparing said first voltage command value with a value of said first carrier wave signal to generate a
first control signal for controlling said first arm;

a second comparator comparing said second voltage command value with a value of said second carrier wave signal to generate
a second control signal for controlling said second arm; and

a third comparator comparing said third voltage command value with a value of said third carrier wave signal to generate a
third control signal for controlling said third arm,

said first to third carrier wave signals including first and second signals having phases offset by 180 degrees from each
other,

said power conversion circuit being an inverter, the power supply apparatus further comprising a converter connected to said
inverter via a direct current positive line and a direct current negative line, wherein

said converter includes fourth to sixth arms connected to fourth to sixth alternating current lines, respectively,
said PWM control circuit includes
a second voltage command value generation circuit generating fourth to sixth voltage command values corresponding to said
fourth to sixth alternating current lines, respectively, in voltage;

a second carrier wave signal generation circuit generating fourth to sixth carrier wave signals corresponding to said fourth
to sixth voltage command values, respectively;

a fourth comparator comparing said fourth voltage command value with a value of said fourth carrier wave signal to generate
a fourth control signal for controlling said fourth arm;

a fifth comparator comparing said fifth voltage command value with a value of said fifth carrier wave signal to generate a
fifth control signal for controlling said fifth arm; and

a sixth comparator comparing said sixth voltage command value with a value of said sixth carrier wave signal to generate a
sixth control signal for controlling said sixth arm,

said first signal is said first carrier wave signal,
said second signal is said second carrier wave signal,
said third carrier wave signal is in phase with said first carrier wave signal,
said fourth carrier wave signal and said fifth carrier wave signal have a phase difference of 180 degrees,
said sixth carrier wave signal is in phase with said fourth carrier wave signal, and
said second carrier wave signal and said fifth carrier wave signal have a phase difference of 180 degrees.

US Pat. No. 9,470,623

PROPERTY MEASUREMENT SYSTEM FOR METAL MATERIAL

TOSHIBA MITSUBISHI-ELECTR...

1. A property measurement system for a metal material, comprising:
a laser oscillator configured to emit a pulse laser beam;
a lens array that has a plurality of small lenses with a same shape, the small lenses being laid in a matrix on a plane perpendicular
to an optical axis of the pulse laser beam, and arranged so that a part of a cross section of the pulse laser beam can be
made incident onto each of the plurality of small lenses;

a condensing lens configured to overlap and condense emitted beams coming from the plurality of small lenses of the lens array
on a same region of a surface of the metal material as a measurement target so that a light quantity density ensures ablation
on a condensed spot;

an aperture plate placed between the metal material and the lens array and the condensing lens, the pulse laser beam that
is condensed by the condensing lens passing through the aperture plate;

a laser interferometer configured to detect, as an electric signal, a pulse ultrasonic wave that is excited by the pulse laser
beam condensed by the condensing lens and propagates through an inside of the metal material; and

a signal processing computer configured to process the electric signal,
wherein a spot size of the condensed spot is more than a predetermined threshold to suppress diffusion of the pulse ultrasonic
wave.

US Pat. No. 9,598,768

METHOD OF FORMING ZINC OXIDE FILM (ZNO) OR MAGNESIUM ZINC OXIDE FILM (ZNMGO) AND APPARATUS FOR FORMING ZINC OXIDE FILM OR MAGNESIUM ZINC OXIDE FILM

TOSHIBA MITSUBISHI-ELECTR...

1. A method, comprising:
(A) converting a solution comprising zinc or zinc and magnesium into a mist by applying ultrasonic waves to said solution,
said solution present in a solution container;

(B) heating a substrate to a temperature sufficient to form a zinc oxide film or a zinc-magnesium oxide film by heating said
substrate with a heating device in contact with said substrate to the sufficient temperature, thereby obtaining a heated substrate
present in a reaction vessel; and

(C) supplying the mist from (A) through a path that connects the solution container to the reaction vessel, thereby applying
the mist to a first main surface of the heated substrate from (B) and supplying ozone to the reaction vessel, thereby applying
the ozone to a first main surface of the heated substrate from (B), thereby forming a zinc oxide or magnesium zinc oxide film
on the first main surface of the heated substrate, said film having a thickness of from 350 to 680 nm and a transmittance
of at least 90% for wavelengths of from 350 nm to 1,500 nm,

wherein said mist comprising zinc or zinc and magnesium and said ozone are introduced sequentially and separately into the
reaction chamber, and

said zinc oxide film is a ZnO film and said magnesium zinc oxide film is a ZnMgO film.

US Pat. No. 9,948,207

INVERTER CONTROL APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. An inverter control apparatus which is configured to control an inverter interconnected to an alternating-current power system, a capacitor being provided on an alternating-current side of the inverter, the apparatus comprising:a system voltage detector configured to detect a system voltage of the alternating-current power system;
a differentiation circuit configured to calculate a differential value of the system voltage detected by the system voltage detector;
a correction current instruction value calculator configured to calculate a correction current instruction value for correcting a current instruction value set for an output current of the inverter, based on the differential value of the system voltage calculated by the differentiation circuit;
an adder configured to receive the correction current instruction value generated from the correction current instruction value calculator that receives the detected system voltage from the system voltage detector, add the correction current instruction value to a preset current instruction value, and output a current instruction value; and
a controller configured to control the inverter based on the current instruction value.

US Pat. No. 9,715,229

POWER EQUALIZATION DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A power equalization device, comprising:
a power demand prediction function of predicting power consumption expected when a plurality of materials are processed at
different locations of a manufacturing plant or manufacturing line of a metallic material;

a power equalization control function of causing a power storage device to make the manufacturing plant or the manufacturing
line perform discharging in the case where power consumption predicted by the power demand prediction function exceeds a prescribed
value, so that power supplied to the manufacturing plant or the manufacturing line from an external power system becomes not
more than the prescribed value;

an operation schedule prediction function of predicting location and time for manufacturing each of rolled materials in the
manufacturing plant or the manufacturing line; and

an individual-product power consumption prediction function of predicting power consumption expected when each of the rolled
materials is manufactured at the location,

wherein on the basis of the location of each of the rolled materials at a point of time, the power demand prediction function
calculates power consumption expected when each of the rolled materials is manufactured at the point of time, and regards
an integrated value of a calculated value of power consumption expected when each of the rolled materials is manufactured
as a predicted value of power consumption of the manufacturing plant or the manufacturing line at the point of time, and

wherein the operation schedule prediction function makes a comparison between a predicted value and an actual value of location
and time expected or obtained when a rolled material is manufactured in the manufacturing plant or the manufacturing line
and improves a prediction accuracy of location and time expected when each of the rolled materials is manufactured.

US Pat. No. 9,780,685

ELECTRICAL POWER CONVERTER WITH A CONVERTER CELL SERIES UNIT

Mitsubishi Electric Corpo...

1. An electrical power converter comprising:
first AC voltage terminals;
second AC voltage terminals;
a positive DC voltage terminal;
a negative DC voltage terminal;
a neutral point between the positive and negative DC voltage terminals;
converter cell series units provided between the first AC voltage terminals and the positive DC voltage terminal, between
the first AC voltage terminals and the neutral point, between the second AC voltage terminals and the neutral point, and between
the second AC voltage terminals and the negative DC voltage terminal, each converter cell series unit composed of one or more
converter cells connected in series, each converter cell including semiconductors elements connected in parallel with a capacitor;

a third inductance connected in series to the converter cell series unit located between the first AC voltage terminals and
the neutral point, wherein the third inductance is a first reactor, not an inductance of wiring, the first reactor having
a terminal directly connected to the neutral point;

a fourth inductance connected in series to the converter cell series unit located between the second AC voltage terminals
and the neutral point, wherein the fourth inductance is a second reactor, not an inductance of wiring, the second reactor
having a terminal directly connected to the neutral point;

a fifth inductance connected in series to the converter cell series unit located between the first AC voltage terminals and
the positive DC voltage terminal, wherein the fifth inductance is inductance of wiring and has a smaller inductance value
than the third inductance; and

a sixth inductance connected in series to the converter cell series unit located between the second AC voltage terminals and
the negative DC voltage terminal,

wherein the sixth inductance is inductance of wiring and has a smaller inductance value than the fourth inductance,
wherein inductances between the first AC voltage terminals and the positive DC voltage terminal, and between the second AC
voltage terminals and the negative DC voltage terminal, are smaller than corresponding inductances between the first AC voltage
terminals and the neutral point, and between the second AC voltage terminals and the neutral point.

US Pat. No. 9,843,247

ROTATING ELECTRIC MACHINE

Toshiba Mitsubishi-Electr...

1. A rotating electric machine comprising:
a rotor which is rotatably supported and which has, on its outer circumference, a plurality of convex-shaped salient pole
sections arranged in a circumferential direction;

a stator core which is disposed around the outer circumference of the rotor with an air gap formed therebetween and which
has, on its inner circumference, a plurality of convex-shaped teeth arranged in a circumferential direction;

field windings each of which is wound around each of the plurality of the teeth, each of the field windings forming a pole;
and

armature windings each of which is wound around each of the plurality of the teeth so as to be insulated from the field windings,
forming a plurality of poles, wherein

the number of the teeth and the number of the poles formed by the field windings are equal, and
a ratio of the number of the poles formed by the field windings to the number of the poles formed by the armature windings
is equal to a predetermined ratio, and the number of the salient pole sections formed in the rotor is equal to (pf+pa)/2, where pf is the number of the poles formed by the field windings, and pa is the number of the poles formed by the armature windings.

US Pat. No. 9,810,588

OPTICAL FIBER TEMPERATURE SENSOR

TOSHIBA MITSUBISHI-ELECTR...

1. An optical fiber temperature sensor which implements a temperature monitoring function in an interphase insulating material
between sandwich bus bars, wherein
the optical fiber temperature sensor is formed by housing an optical fiber cable in a housing which is formed from an ultra-thin
sheet made from an insulating material having insulation quality equal to or higher than the interphase insulating material
between the sandwich bus bars,

a plurality of ultra-thin columnar members, each made from the same material as the housing, are housed in a plurality of
locations in the housing,

a plurality of sensor rings are each formed by unfixedly winding a portion of the optical fiber cable with a length equal
to or longer than that corresponding to range resolution around the corresponding one of the ultra-thin columnar members,

the plurality of sensor rings measure temperatures in the plurality of locations, respectively,
silicone sealing is applied to housing side surfaces, and
all surfaces of the housing are hermetically sealed with a hermetic sealing member made from a silicone-based liquid insulating
material.

US Pat. No. 9,812,992

POWER CONVERSION SYSTEM

Mitsubishi Electric Corpo...

1. A power conversion system comprising:
a power converter for performing power conversion between plural-phase AC and DC, the power converter including a plurality
of legs each having a positive arm and a negative arm connected in series, with a connection point therebetween connected
to each phase AC line, the plurality of legs being connected in parallel between positive and negative DC buses; and

a control device for controlling the power converter, wherein
each of the positive arm and the negative arm of each leg is composed of at least one converter cells connected in series
and including: a series unit of a plurality of semiconductor switching elements connected in series to each other; and a DC
capacitor connected in parallel to the series unit, a terminal of the semiconductor switching element being used as an output
terminal,

the control device includes a voltage command generating unit for generating a first voltage command for the positive arm
and a second voltage command for the negative arm, to perform output control for each converter cell in the positive arm and
the negative arm, and

the voltage command generating unit includes:
a current control unit for calculating control commands for controlling an AC current component flowing through each phase
AC line, and a circulating current component for each phase which circulates between the legs; and

a command distributing unit for, on the basis of the control commands and a DC voltage command value for voltage between the
DC buses, subtracting voltage drop portions due to inductance values in the positive arm and the negative arm from voltages
assigned as outputs of the positive arm and the negative arm, to determine the first voltage command and the second voltage
command.

US Pat. No. 9,621,026

POWER CONVERSION APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion apparatus for converting DC power, supplied from a first DC power supply having a first electrode and
a second electrode, and from a second DC power supply having a first electrode connected to a second electrode of said first
DC power supply and a second electrode, into AC power, and supplying the AC power to a load, said power conversion apparatus
comprising:
a first main switch having a first end coupled to the first electrode of said first DC power supply, and a second end coupled
to said load,

a first main diode connected in parallel with said first main switch, so as to have a conducting direction opposite to the
conducting direction of said first main switch,

a first snubber capacitor connected in parallel with said first main switch and said first main diode,
a first snubber diode connected in series with said first snubber capacitor and connected between said first snubber capacitor
and the second end of said first main switch, so as to have a conducting direction identical to the conducting direction of
said first main switch,

a first auxiliary switch and a first auxiliary reactor connected between a connection node of said first DC power supply and
said second DC power supply and a connection node of said first snubber capacitor and said first snubber diode, and connected
in series with each other,

a second main switch having a first end coupled to the second end of said first main switch and the second end coupled to
the second electrode of said second DC power supply, provided so as to have a conducting direction identical to the conducting
direction of said first main switch,

a second main diode connected in parallel with said second main switch, so as to have a conducting direction opposite to the
conducting direction of said second main switch,

a second snubber capacitor connected in parallel with said second main switch and said second main diode,
a second snubber diode connected in series with said second snubber capacitor, and connected between said second snubber capacitor
and the first end of said second main switch, so as to have a conducting direction identical to the conducting direction of
said second main switch,

a second auxiliary switch and a second auxiliary reactor connected between a connection node of said first DC power supply
and said second DC power supply and a connection node of said second snubber capacitor and said second snubber diode, and
connected in series with each other, and

a protection circuit for causing, when voltage applied to said first snubber capacitor becomes greater than or equal to a
predetermined value or when voltage applied to said second snubber capacitor becomes greater than or equal to the predetermined
value, a charging current formerly flowing from said first DC power supply and said second DC power supply to said first snubber
capacitor or said second snubber capacitor to flow to another current path, said protection circuit including

a first transformer and a second transformer, and
a first clamp diode and a second clamp diode,
said first transformer including
a first primary winding connected between the second end of said first main switch and said load, and
a first secondary winding connected between the first electrode of said first DC power supply and the second electrode of
said first DC power supply, and magnetically coupled to said first primary winding,

said second transformer including
a second primary winding connected between the first end of said second main switch and said load, and
a second secondary winding connected between the first electrode of said second DC power supply and the second electrode of
said second DC power supply, and magnetically coupled to said second primary winding,

said first secondary winding and said first clamp diode connected in series between the first electrode of said first DC power
supply and the second electrode of said first DC power supply,

said second secondary winding and said second clamp diode connected in series between the first electrode of said second DC
power supply and the second electrode of said second DC power supply,

said first secondary winding and said first clamp diode connected in series, and
said first primary winding and said second primary winding connected in series, and the connection node of said first primary
winding and said secondary primary winding connected to said load.

US Pat. No. 10,171,019

CONTROLLER FOR POWER CONVERTER

Toshiba Mitsubishi-Electr...

1. A controller for a power converter configured to drive a motor, the controller comprising:a torque command value calculation module configured to calculate a torque command value based on a speed command value of the motor;
an output voltage controlling module configured to control an output voltage of the power converter based on the torque command value calculated by the torque command value calculation module;
a voltage command value correcting module configured to correct a voltage command value to the power converter based on the measured output voltage from the power converter;
a flux estimation module configured to calculate estimate values of the stator flux and rotor flux of the motor in a subsequent control period based on the voltage command value corrected by the voltage command value correcting module and a measured current value of the stator; and
a motor speed estimation module configured to calculate an estimate value of a speed of the motor in a subsequent control period based on the estimate value calculated by the flux estimation module,
wherein the flux estimation module further comprises:
a current observing module configured to calculate an estimate value of the stator current in a subsequent control period based on the voltage command value corrected by the voltage command value correcting module and the measured stator current value;
a first flux estimation module configured to calculate an estimate value of the rotor flux of the motor based on an estimate value of an electrical angle of the motor and the measured stator current value; and
a second flux estimation module configured to calculate estimate values of the stator flux and rotor flux in a subsequent control period based on the voltage command value corrected by the voltage command value correcting module, the estimate value calculated by the current observing module and the measured stator current value.

US Pat. No. 9,702,915

SURFACE POTENTIAL DISTRIBUTION MEASURING DEVICE AND SURFACE POTENTIAL DISTRIBUTION MEASURING METHOD

TOSHIBA MITSUBISHI-ELECTR...

1. A surface potential distribution measuring device comprising:
a laser configured to emit laser light;
a Pockels crystal, extending to a longitudinal direction along the direction of the laser light, configured to receive, at
its first end surface, the laser light emitted from the laser;

a mirror having a mirror surface mounted at a second end surface of the Pockels crystal and configured to reflect the laser
light incident from the first end surface of the Pockels crystal in a direction opposite to an incident direction of the laser
light;

a light detector having a band following a high-frequency component of a pulse voltage and configured to receive the laser
light reflected by the mirror and detecting, as a light intensity of the laser light, a detection light intensity corresponding
to an output voltage which is a potential difference between the first end surface of the Pockels crystal and the second end
surface thereof;

a voltage calibration database configured to store, when a plurality of mutually different input voltages are applied to a
rear surface of the mirror in voltage calibration processing to be performed before a test, input-to-output voltage characteristics
representing a relationship between the different input voltages and the output voltages of the Pockels crystal obtained when
the different input voltages are applied to the rear surface of the mirror; and

a computing section configured to set, when a part of a surface of an object to be measured is set at a rear side of the mirror
as a test location in surface potential measurement processing to be performed during the test, the output voltage of the
Pockels crystal obtained when a voltage is applied to the object as an output voltage at test time and identifying an input
voltage corresponding to the output voltage at test time as the surface potential of the object based on the input-to-output
voltage characteristics stored in the voltage calibration database,

wherein the first end surface of the Pockels crystal is grounded.

US Pat. No. 9,685,884

SEVEN-LEVEL INVERTER APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. In a seven-level inverter apparatus comprising:a three-phase three-level inverter which converts a DC of a first DC power source of three levels into an AC;
three single-phase five-level inverters, each of which converts a DC of a second power source of three levels having the same
voltage as the first DC power source into an AC, an output thereof being connected in series with an output of each phase
of the three-phase three-level inverter; and

pulse width modulation control means provided for each phase which performs pulse width modulation control of a give voltage
reference to supply gate pulses to switching devices composing the relevant phase of the three-level inverter and the single-phase
five-level inverter of the relevant phase;

the seven-level inverter apparatus is characterized in that:
the pulse width modulation control means has
means which converts the voltage reference into a pulse width modulated voltage level of the relevant phase, and
state transition means which determines an output of a switching leg of the relevant phase of the three-level inverter, and
outputs of outside and inside switching legs of the single-phase five-level inverter, based on transition of this voltage
level; and

the state transition means
makes all of the three outputs of the switching leg of the relevant phase of the three-level inverter, and the outside and
inside switching legs of the single-phase five-level inverter 0 or positive, when the voltage level is positive,

makes all of the three outputs of the switching leg of the relevant phase of the three-level inverter, and the outside and
inside switching legs of the single-phase five-level inverter 0 or negative, when the voltage level is negative, and

makes all of the three outputs of the switching leg of the relevant phase of the three-level inverter, and the outside and
inside switching legs of the single-phase five-level inverter 0, when the voltage level is 0.

US Pat. No. 9,564,842

DC VOLTAGE DETECTOR AND POWER CONVERTER USING THE SAME

TOSHIBA MITSUBISHI-ELECTR...

1. A DC voltage detector configured to detect, in a power converter which converts a first AC voltage to a DC voltage and
converts said DC voltage to a second AC voltage to be supplied to a load, said DC voltage, comprising:
an AC voltage detector configured to detect said first AC voltage or said second AC voltage; and
an arithmetic circuit configured to determine said DC voltage on the basis of said first AC voltage or said second AC voltage
detected by said AC voltage detector, wherein

said load is a synchronous motor,
said power converter is a thyristor starter for starting said synchronous motor, said power converter including
a converter configured to convert a first AC power to a DC power,
a DC reactor configured to smooth a direct current, and
an inverter configured to convert said DC power supplied from said converter via said DC reactor to a second AC power which
is supplied to said synchronous motor,

each of said converter and said inverter includes a plurality of thyristors,
each of said first AC voltage and said second AC voltage is a three-phase AC voltage,
said first AC voltage is a voltage input to said converter,
said second AC voltage is a voltage output from said inverter,
the frequency of said second AC voltage is variable, and
said arithmetic circuit, on the basis of said first or second AC voltage detected by said AC voltage detector and a plurality
of control signals for controlling said plurality of thyristors included in said converter or said inverter, determines said
DC voltage output from said converter or said DC voltage input to said inverter.

US Pat. No. 10,050,469

UNINTERRUPTIBLE POWER SUPPLY DEVICE AND UNINTERRUPTIBLE POWER SUPPLY SYSTEM USING THE SAME

TOSHIBA MITSUBISHI-ELECTR...

1. An uninterruptible power supply device comprising:a converter configured to convert an AC voltage supplied from an AC power supply into a first DC voltage, a second DC voltage, and a third DC voltage and output the first, second, and third DC voltages to a first DC bus, a second DC bus, and a third DC bas, respectively;
an inverter configured to convert the first, second, and third DC voltages supplied through the first, second, and third DC buses into an AC voltage and supply the AC voltage to a load;
a bidirectional chopper connected between the first, second, and third DC buses and a power storage device,
the first DC voltage being higher than the second DC voltage, and the third DC voltage being an intermediate voltage between the first DC voltage and the second DC voltage,
the bidirectional chopper including
a first transistor and a second transistor connected in series between the first DC bus and the third DC bus,
a third transistor and a fourth transistor connected in series between the third DC bus and the second DC bus,
a first diode, a second diode, a third diode, and a fourth diode connected in anti-parallel with the first transistor, the second transistor, the third transistor, and the fourth transistor, respectively, and
a normal mode reactor including a first coil connected between a first node and a positive electrode of the power storage device, and a second coil connected between a negative electrode of the power storage device and a second node, the first node being located between the first transistor and the second transistor, the second node being located between the third transistor and the fourth transistor; and
a controller configured to perform
a charging mode during a normal condition in which the AC power supply supplies an AC voltage, the controller in the charging mode causing the first transistor and the fourth transistor to be complementarily turned on to charge the power storage device, and
a discharging node during an outage in which the AC power supply stops supply of AC power, the controller in the discharging mode causing the second transistor and the third transistor to be complementarily turned on to discharge the power storage device,
the controller in the charging mode controlling an ON period of at least one of the first transistor and the fourth transistor to cause a value of current flowing through the first coil to be equal to a value of current flowing through the second coil.

US Pat. No. 10,033,299

CONVERTER AND POWER CONVERSION DEVICE INCLUDING THE SAME

TOSHIBA MITSUBISHI-ELECTR...

1. A converter configured to convert alternating-current voltage applied to an input terminal into first to third direct-current voltages to be output to first to third output terminals, respectively, comprising:a first diode having an anode and a cathode connected to the input terminal and the first output terminal, respectively;
a second diode having an anode and a cathode connected to the second output terminal and the input terminal, respectively; and
a first bidirectional switch connected between the input terminal and the third output terminal,
the first direct-current voltage being higher than the second direct-current voltage, and the third direct-current voltage being an intermediate voltage between the first direct-current voltage and the second direct-current voltage,
the first bidirectional switch including third to sixth diodes and a first transistor,
the third diode having an anode connected to the input terminal and a cathode connected to a first electrode of the first transistor, and the fourth diode having an anode connected to the third output terminal and a cathode connected to the first electrode of the first transistor,
the fifth diode having a cathode connected to the input terminal and an anode connected to a second electrode of the first transistor, and the sixth diode having a cathode connected to the third output terminal and an anode connected to the second electrode of the first transistor,
the first transistor being turned on or off in a predetermined cycle,
the first diode, the second diode, and the first transistor being each formed of a wide-bandgap semiconductor, and
the third to sixth diodes being each formed of a semiconductor other than wide-bandgap semiconductors.

US Pat. No. 10,033,189

OPERATION CONTROL APPARATUS FOR SOLAR POWER SYSTEM

Toshiba Mitsubishi-Electr...

1. An operation control apparatus for a solar power system that converts direct-current power from a solar battery into single-phase alternating-current power by a power converter, supplies an alternating-current power system with the single-phase alternating-current power converted, and comprises a switch at a link point between the power converter and the alternating-current power system, the operation control apparatus comprising:a voltage detector that detects a single-phase alternating-current first voltage of the switch on a side the power converter, and a second voltage thereof on a side of the alternating-current power system;
a switch-on determination device that is input with the first and second voltages from the voltage detector on the sides of the power converter and the alternating-current power system, and supplies the switch with a switch-on command if both of the first and second voltages are approximately equal to each other;
a criterion calculator that obtains a voltage magnitude operation criterion for the power converter, by multiplying, by a margin, a moving average voltage of the magnitude of the second voltage detected by the voltage detector on the side of the alternating-current power system;
a direct-current voltage detector that detects a direct-current output voltage value of the solar battery; and
an operation determination device that compares the direct-current output voltage value detected by the direct-current voltage detector with the voltage magnitude operation criterion obtained by the criterion calculator, and supplies the power converter with a command to begin operation if the direct-current output voltage value is greater than the voltage magnitude operation criterion.

US Pat. No. 9,712,081

POWER CONVERTER

TOSHIBA MITSUBISHI-ELECTR...

1. A power converter comprising:
inverters, AC sides of the inverters being connected in parallel; and
a controller configured to control total output power of the inverters by controlling output power of at least one of the
inverters by a control command in a control cycle shorter than a shortest communication cycle which allows communication of
the control command with each of the inverters and determine a first power command value and a second power command value,
the first power command value being lower than a proportional division power value obtained by proportionally dividing a required
power value required as the total output power of the inverters based on respective rated outputs of the inverters, the second
power command value being higher than the proportional division power value, wherein the controller controls output powers
of the inverters at the first power command value and the second power command value determined by the controller.

US Pat. No. 9,606,163

GROUND FAULT DETECTING CIRCUIT AND POWER CONVERTING DEVICE INCLUDING THE SAME

TOSHIBA MITSUBISHI-ELECTR...

1. A thyristor starter for starting a synchronous motor comprising:
a converter configured to convert a first three-phase AC power to DC power;
a DC reactor configured to smooth said DC power;
an inverter configured to convert said DC power supplied from said converter through the intermediary of said DC reactor to
a second three-phase AC power, and supply said second three-phase AC power to said synchronous motor through first to third
AC lines;

a ground fault detecting circuit configured to detect a ground fault in said thyristor starter; and
a control circuit configured to control said converter and said inverter to start said synchronous motor, and to stop the
operation of said converter and said inverter when said ground fault has been detected by said ground fault detecting circuit,

said ground fault detecting circuit including
first to fourth resistance elements, one terminals of said first to third resistance elements being connected to said first
to third AC lines, respectively, the other terminals of three of said resistance elements being commonly connected to one
terminal of said fourth resistance elements, and the other terminal of said fourth resistance element being configured to
receive a ground voltage,

said converter including first and second terminals configured to output DC voltage,
said inverter including third and fourth terminals configured to receive the DC voltage,
said DC reactor being connected between said first and third terminals,
said second and fourth terminals being connected to each other,
a voltage across the terminals of said fourth resistance element being about 0 V when no ground fault occurs, and the voltage
across the terminals of the fourth resistance element increasing in amplitude when the ground fault occurs in at least one
of said first to third terminals and said first to third AC lines, and

said ground fault detecting circuit further including
a determination circuit configured to determine that said ground fault has occurred in at least one of said first to third
terminals and said first to third AC lines when a voltage across the terminals of said fourth resistance element is greater
than a predetermined voltage.

US Pat. No. 9,712,084

ELECTRIC POWER CONVERSION DEVICE

Mitsubishi Electric Corpo...

1. An electric power conversion device comprising:
a power conversion unit connected to a three-phase AC circuit; and
a converter control unit for controlling the power conversion unit, wherein
the power conversion unit includes three arms connected to the AC circuit and connected in a delta-connection manner,
each arm has one or a plurality of unit cells connected in cascade, to which a reactor is connected in series,
each unit cell includes a series unit of a plurality of semiconductor switches connected in series to each other, and a DC
capacitor connected in parallel to the series unit,

the converter control unit includes:
a phase DC voltage control unit for calculating phase arm current command values on the basis of DC capacitor voltages of
the cells;

a negative sequence current command value calculation unit for calculating a negative sequence current command value on the
basis of the phase arm current command values;

an output current control unit for, on the basis of the negative sequence current command value and a predetermined positive
sequence current command value, calculating a voltage command value including both a positive sequence component and a negative
sequence component, for controlling output current of the power conversion unit;

a circulating current control unit for, on the basis of the phase arm current command values, calculating a zero sequence
voltage command value for controlling circulating current;

a voltage command value calculation unit for calculating an output voltage command value for each unit cell on the basis of
the voltage command value including both the positive sequence component and the negative sequence component, the zero sequence
voltage command value, the cell DC capacitor voltages, and the phase arm currents; and

a gate signal generation unit for calculating a gate signal for controlling each semiconductor switch in the unit cell on
the basis of the output voltage command value, and

imbalance of the cell DC capacitor voltages among phases due to grid imbalance is controlled by the circulating current and
the negative sequence current.

US Pat. No. 9,646,795

LOW-FREQUENCY CIRCUIT BREAKER

Toshiba Mitsubishi-Electr...

2. A low-frequency circuit breaker, comprising:
a semiconductor switch and a mechanical switch, the semiconductor switch configured by connecting first and second thyristors
in anti-parallel with each other, wherein the mechanical switch is connected in series with alternating-current paths forming
part of an alternating-current circuit, and the semiconductor switch is connected between different phases of the alternating-current
paths;

an abnormality detector which detects an abnormality of a current flowing through the alternating-current paths; and
a circuit breaker control circuit which makes the mechanical switch constantly conductive to cause a conduction current to
flow to the alternating-current paths, makes the first and second thyristors conductive by supplying a gate signal to the
first and second thyristors at least immediately before current cutoff, makes the conduction current through the alternating-current
paths be switched to flow through the thyristors by supplying an open command to the mechanical switch when an abnormality
of a current is detected, and turns off the gate signal to the thyristors after switching the conduction current, thereby
to cut off an abnormal current flowing through the alternating-current paths.

US Pat. No. 9,673,733

CONTROL APPARATUS FOR PHOTOVOLTAIC INVERTER

TOSHIBA MITSUBISHI-ELECTR...

1. A control apparatus for a photovoltaic inverter that converts power generated by sunlight into AC power interconnecting
with an AC power system, the control apparatus comprising:
a system voltage detector configured to detect a system voltage of the AC power system;
a DC voltage detector configured to detect a DC voltage applied to the inverter;
an output voltage deficiency detector configured to detect an output voltage deficiency of the inverter based on the system
voltage detected by the system voltage detector and the DC voltage detected by the DC voltage detector;

an output-current detector configured to detect an output current of the inverter;
an output-current distortion detector configured to detect distortion of the output current based on a harmonic included in
the output current detected by the output-current detector;

a maximum power point tracking controller configured to perform maximum power point tracking control on the inverter; and
an output-current distortion controller configured to perform control to set the DC voltage applied to the inverter to a voltage
at a power point less than a maximum power point of the maximum power point tracking control when the output voltage deficiency
is detected by the output voltage deficiency detector and the distortion of the output current is detected by the output-current
distortion detector.

US Pat. No. 9,662,697

TAKE-UP DEVICE FOR STRIP

TOSHIBA MITSUBISHI-ELECTR...

1. A take-up device for a strip, comprising:
a mandrel for taking up the strip;
a fluid-pressure device for expanding and contracting the mandrel,
a pressure detection device that detects a pressure of a hydraulic fluid in the fluid-pressure device;
a control device configured to
calculate a tightening pressure acting on the mandrel, based on the pressure detected by the pressure detection device,
store a first reference turn count, and
control the fluid-pressure device,
wherein the control device performs position control for expanding the mandrel according to a number of turns of the strip
until the number of turns of the strip reaches the first reference turn count;

wherein the control device performs constant-pressure control for making the calculated tightening pressure constant after
the number of turns of the strip reaches the first reference turn count,

wherein the control device stores a first reference pressure; and
wherein if the calculated tightening pressure reaches the first reference pressure before the number of turns of the strip
reaches the first reference turn count, the control device starts the constant-pressure control before the number of turns
of the strip reaches the first reference turn count.

US Pat. No. 9,755,542

DIRECT-CURRENT POWER TRANSMISSION POWER CONVERSION DEVICE AND DIRECT-CURRENT POWER TRANSMISSION POWER CONVERSION METHOD

Mitsubishi Electric Corpo...

1. A DC power transmission power conversion device comprising:
a power converter including a plurality of leg circuits composed of a positive arm and a negative arm for each phase which
are connected in series to each other and have a connection point therebetween connected to an AC line for a corresponding
phase, the leg circuits being connected in parallel between positive and negative DC buses, the power converter performing
power conversion between plural-phase AC and DC; and

a control device for controlling the power converter, wherein
each of the positive arm and the negative arm composing each leg circuit is composed of at least one converter cell connected
in series,

the converter cell is composed of a series unit of a plurality of semiconductor switching elements connected in series, and
a DC capacitor connected in parallel to the series unit,

the control device performs output control for each converter cell composing the positive arm and the negative arm,
the control device includes:
a capacitor voltage control unit for generating a current command value (ipref, ip+ref, ip?ref) for voltage control for each DC capacitor on the basis of voltage (Vcap) of the DC capacitor;

a current control unit for, on the basis of the current command value (ipref, ip+ref, ip?ref) from the capacitor voltage control unit, generating a voltage command (Vpc+, Vpc?) for AC current control, of a positive arm voltage command (Vp+) for controlling current flowing through the positive arm and a negative arm voltage command (Vp?) for controlling current flowing through the negative arm; and

a DC control unit for, on the basis of DC voltage (Vdc) between the DC buses, DC current (idc) flowing through the DC buses,
and a command value (Vdcref, idcref) as a preset control target value, generating a DC voltage command (Vdc*) for DC voltage
control, of the positive arm voltage command (Vp+) and the negative arm voltage command (Vp?), and

the control device corrects the command value (Vdcref or idcref) to be given to the DC control unit, in accordance with a
detected amount of voltage variation in each DC capacitor.

US Pat. No. 9,722,458

POWER CONVERSION DEVICE AND METHOD OF CONTROLLING THE SAME

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion device comprising:
a smoothing capacitor adapted to smooth a direct-current input voltage input from a direct-current power source;
an input voltage detection unit adapted to detect a voltage value of the input voltage;
a power conversion unit adapted to convert a direct-current voltage smoothed by the smoothing capacitor into an alternating-current
voltage to output the alternating-current voltage to a power system; and

a controller adapted to control a conversion in the power conversion unit,
the controller having a first operation mode of outputting active power to the power system when the voltage value detected
by the input voltage detection unit is one of equal to and higher than a determination value, having a second operation mode
of outputting reactive power to the power system when the voltage value is lower than the determination value, determining
whether or not the voltage value is one of equal to and higher than the determination value, and making a transition from
the first operation mode to the second operation mode within a predetermined time from a time point when it is determined
that the voltage value is lower than the determination value.

US Pat. No. 9,714,968

SURFACE POTENTIAL DISTRIBUTION MEASURING DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A surface-potential distribution measuring device for measuring a surface potential of an electric-field-reduction system
that is applied along a longitudinal direction of a stator coil end which is a stator coil end unit of a stator of a rotating
electric machine, the device comprising:
a laser light source to emit a laser beam;
a Pockels crystal to receive the laser beam emitted from the laser light source via a first end surface of the Pockels crystal
in an incident direction;

a mirror whose surface is provided at a second end surface that is the opposite side of the Pockels crystal from the first
end surface and which reflects the laser beam that enters the Pockels crystal via the first end surface in a direction opposite
to the incident direction;

a photodetector having a band to follow a high frequency component of an inverter pulse voltage, a photodetector to receive
the laser beam reflected by the mirror, and to detect light intensity of the laser beam corresponding to an output voltage
that is a difference in potential between the first end surface and the second end surface of the Pockels crystal;

a holding and mounting part to hold and to move at least the Pockels crystal;
a voltage correction database to store input voltage-output voltage characteristics showing relation between different input
voltages and the output voltages of the Pockels crystal when various input voltages are applied to a back side of the mirror;
and

a calculation unit to identify an input voltage corresponding to a testing output voltage as a surface potential of the electric-field-reduction
system based on the input voltage-output voltage characteristics stored in the voltage correction database when the back side
of the mirror is disposed with a unit of a surface of the electric-field-reduction system as a test point and when the output
voltage of the Pockels crystal that is output as voltage is applied to the stator coil is regarded as the testing output voltage,
wherein

the Pockels crystal is formed in such a way that a size of a cross section of the Pockels crystal that is perpendicular to
an axial direction changes along the axial direction, and

the holding and mounting part includes:
a protection unit to protect a structure of the Pockels crystal,
a movement unit to move the Pockels crystal in order to measure a surface potential of the electric-field-reduction system,
and

a drive control unit to control the movement unit.

US Pat. No. 9,713,244

POWER-SUPPLY APPARATUS

Toshiba Mitsubishi-Electr...

1. A power supply apparatus that outputs an alternating-current voltage to a plasma generator, the plasma generator being
a capacitive load including a plurality of discharge cells connected to one another, said power supply apparatus comprising:
an inverter that converts direct-current electric power to alternating-current electric power;
a controller that controls an action of said inverter;
a detector that is provided for said inverter and detects an electricity amount used to obtain an inverter output power factor;
and

resonance means that creates a resonance state between said power supply apparatus and said plasma generator,
wherein said controller
(A) changes an inverter frequency when a value of electric power input equal to 100% of a rated power of said power supply
apparatus is instructed, the inverter frequency being a control value for said inverter, and obtains said inverter output
power factor for each of a plurality of inverter frequencies on a basis of said electricity amount acquired from said detector,
and

(B) determines, as a driving frequency of said inverter, one of said plurality of inverter frequencies at which said inverter
output power factor obtained in said (A) is maximized, and

(C) fixedly outputs, after said (B), said driving frequency to said inverter when a value of the electric power input that
is less than 100% of the rated power of said power supply is instructed.

US Pat. No. 9,703,754

AUTOMATIC REMOTE MONITORING AND DIAGNOSIS SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. An automatic remote monitoring and diagnosis system which diagnoses electronic control devices or equipment, comprising:
an environmental sensor which measures environmental data related to an installation environment of the electronic control
devices or equipment with a prescribed measurement cycle and sends measurement data by wireless communication;

a plurality of physical sensors which measures physical data related to the electronic control devices or equipment and sends
measurement data by wireless communication;

a wireless server which collects the measurement data sent from the environmental sensor and the plurality of physical sensors
by wireless communication and sends the collected measurement data at prescribed time intervals;

a diagnostic client which is communicably connected to the wireless server by a first communication network, collects the
measurement data sent from the wireless server via the first communication network, and sends the collected measurement data
at prescribed time intervals;

a diagnostic server which is communicably connected to the diagnostic client by a second communication network, receives the
measurement data sent from the diagnostic client via the second communication network, and carries out a diagnosis of the
electronic control devices or equipment based on the received measurement data;

a data retaining device which retains the measurement data received by the diagnostic server; and
a knowledge database which stores information necessary when the diagnostic server carries out the diagnosis,
wherein
the diagnostic server sends results of the diagnosis to the diagnostic client via the second communication network and in
a case where as a result of the diagnosis there is a problem in the electronic control devices or equipment, the diagnostic
server determines a remedy for the problem and sends the remedy to the diagnostic client via the second communication network,

the plurality of physical sensors includes:
a first sensor group including a sensor configured to measure voltage and current with a first measurement cycle of an order
of 10 milliseconds; and

a second sensor group including a sensor configured to measure electromagnetic wave and static electricity with a second measurement
cycle of an order of 10 nanoseconds.

US Pat. No. 9,948,223

DRIVE UNIT OF SYNCHRONOUS MOTOR

TOSHIBA MITSUBISHI-ELECTR...

1. A drive unit of a synchronous motor comprising:a magnetic flux operation circuitry configured to, in the case where a direction of a magnetic field pole of the synchronous motor is regarded as a d-axis and a direction orthogonal to the d-axis is regarded as a q-axis, calculate a magnetic flux of the d-axis and a magnetic flux of the q-axis on the basis of a current of the d-axis, a current of the q-axis, and a field current of the synchronous motor; and
a magnetic flux operation error correcting circuitry configured to
calculate a phase difference between a voltage and a current of the synchronous motor being inputted into the magnetic flux operation error correcting circuitry;
calculate an inner-phase difference angle from the magnetic flux of the d-axis and the magnetic flux of the q-axis, wherein the inner-phase difference angle=tan?1 X, where X=(the magnetic flux of the q-axis)/(the magnetic flux of the d-axis); and
correct the inner-phase difference angle on the basis of the phase difference, wherein
the drive unit is configured to drive the synchronous motor with the corrected inner-phase difference angle, and
the magnetic flux operation error correcting circuitry calculates a corrected magnetic flux of the q-axis on the basis of the magnetic flux of the d-axis, the magnetic flux of the q-axis, and the corrected inner-phase difference angle, wherein the corrected magnetic flux of the q-axis=?A·sin B, where A=(the magnetic flux of the d-axis)2+(the magnetic flux of the q-axis)2, and B=the corrected inner-phase difference angle.

US Pat. No. 9,824,813

REACTOR AND POWER SUPPLY DEVICE EMPLOYING THE SAME

TOSHIBA MITSUBISHI-ELECTR...

1. A power supply device comprising:
N (N is an integer of 2 or more) power supplies; and
a reactor by which said N power supplies are connected in parallel to a load,
said reactor including:
an annular iron core; and
N coils separately wound around said iron core,
said N coils having first electrodes connected to output terminals of said N power supplies, respectively, and second electrodes
each connected to said load,

said N coils being sequentially arranged in a circumferential direction of said iron core, said N coils being wound from the
first electrodes to the second electrodes in the same winding direction,

currents flowing from said N power supplies to said load through said N coils to generate magnetic fluxes in the same direction
in said iron core by said N coils.

US Pat. No. 9,775,266

MODULAR UNINTERRUPTIBLE POWER SUPPLY APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. An uninterruptible power supply apparatus, comprising:
a combined converter/chopper circuit configured to convert a first AC power to DC power that is stored in a power storage
device and to output the DC power stored in the power storage device during a power failure in which supply of the first AC
power is stopped;

an inverter to convert the DC power output by the combined converter/chopper circuit to a second AC power;
a first cooler to cool said combined converter/chopper circuit; and
a second cooler to cool said inverter;
said combined converter/chopper circuit and said first cooler making up a single unit,
said inverter and said second cooler making up a single unit,
said first cooler including
a first flat plate portion having a first surface on which said combined converter/chopper circuit is mounted, and
a plurality of first fins provided on a second surface of said first flat plate portion,
said second cooler including
a second flat plate portion having a third surface on which said inverter is mounted, and
a plurality of second fins provided on a fourth surface of said second flat plate portion,
said first AC power being three-phase AC power,
said combined converter/chopper circuit including three combined converter/chopper sub-circuits corresponding to three phases
of said first AC power, respectively,

each of said combined converter/chopper sub-circuits including a plurality of first switching elements connected in series
between a first node and a second node and a plurality of first diodes connected in antiparallel to said plurality of first
switching elements, respectively, a plurality of second switching elements connected in series between said first node and
said second node and a plurality of second diodes connected in antiparallel to said plurality of second switching elements,
respectively,

wherein said first cooler and said second cooler are identical in cooling capacity.

US Pat. No. 9,710,537

DATA COLLECTION SYSTEM AND DATA COLLECTION SYSTEM PROGRAM

TOSHIBA MITSUBISHI-ELECTR...

1. A data collection system comprising a data collection apparatus and a master data collection apparatus which are connected
to a control apparatus via a network,
the master data collection apparatus comprising one or more first circuits configured to:
store, on a master scan data storage, data which are transmitted among the control apparatus, the data collection apparatus
and the master data collection apparatus by scan transmission;

divide a memory area in the master scan data storage into a plurality of groups;
divide a memory area in each group of the plurality of groups into a plurality of subgroups;
select at least one of the divided subgroups as a collection group, which is a unit to continuously read data in the collection
group, in order to avoid decrease in a read speed of the data, on the basis of a reading pattern for the collection group,
the reading pattern being predetermined according to the data transfer rate characteristic corresponding to a size of the
data and indicating whether the collection group stores the data to be read;

assign a plurality of collection groups selected by the one or more first circuits to the data collection apparatus and the
master data collection apparatus in order to distribute load of collection of the data between the data collection apparatus
and the master data collection apparatus;

generate a first schedule for reading the data from the master scan data storage per unit time, on the basis of a collection
cycle for collecting the data and a first number of collection groups assigned to the master data collection apparatus by
the one or more first circuits;

read the data from the master scan data storage on the basis of the first schedule generated by the one or more first circuits;
and

store the data read by the one or more first circuits, and
the data collection apparatus comprising one or more second circuits configured to:
store, on a scan data storage, the data which are transmitted among the control apparatus, the data collection apparatus and
the master data collection apparatus by scan transmission;

generate a second schedule for reading the data from the scan data storage per unit time, on the basis of the collection cycle
for collecting the data and a second number of collection groups assigned to the data collection apparatus by the one or more
first circuits;

read the data from the scan data storage on the basis of the second schedule generated by the one or more second circuits;
and

store the data read by the one or more second circuits.

US Pat. No. 9,939,793

PLANT CONTROL MONITORING SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A plant control monitoring system, comprising:controller circuitry which controls a plurality of machine groups constituting a plant;
a plurality of human-machine interface (HMI) clients which are provided in such a manner as to correspond to each of the plurality of machine groups and in which one or more operation monitoring screens are displayed;
an HMI server which is provided in such a manner as to be communicable with the HMI clients and collects data from the controller;
server-side storage circuitry which is provided in the HMI server and stores operation right processing information on an operation right for the machine groups on the operation monitoring screens displayed in the HMI clients;
client-side storage circuitry which are provided in the HMI clients and store operation right processing information duplicated from operation right processing information stored in the server-side storage circuitry; and
operation right processing circuitry which are provided in the HMI clients in such a manner as to correspond to each of the operation monitoring screens and perform operation right processing on the operation monitoring screens based on operation right information stored in the client-side storage circuitry, the operation right processing being a process which determines whether or not an operation to the machine groups is authorized,
wherein the client-side storage circuitry includes:
global variable storage circuitry which is provided for each of the HMI clients and is accessible from the operation right processing circuitry belonging to the same HMI client; and
local variable storage circuitry which is provided for each of the operation monitoring screens and is accessible from the operation right processing circuitry belonging to the same operation monitoring screen,
wherein the global variable storage circuitry stores operation right processing information for each client on an operation right set for each of the HMI clients among operation right information, and
wherein the local variable storage circuitry stores operation right processing information for each screen on an operation right set for each of the operation monitoring screens among operation right information.

US Pat. No. 9,874,592

ABNORMALITY DETECTION CIRCUIT FOR POWER STORAGE DEVICE, AND POWER STORAGE DEVICE INCLUDING SAME

TOSHIBA MITSUBISHI-ELECTR...

1. An abnormality detection circuit configured to detect an abnormality of a power storage device,
said power storage device including:
a converter configured to convert alternating current power supplied from an alternating current power supply into direct
current power and output a positive electrical potential and a negative electrical potential having absolute values equal
to each other;

a power storage unit configured to store direct current power generated by said converter; and
an inverter configured to convert direct current power from said converter and direct current power stored in said power storage
unit into alternating current power and supply the alternating current power to a load,

said power storage unit including:
a positive electrode terminal and a negative electrode terminal respectively receiving said positive electrical potential
and said negative electrical potential from said converter; and

a power storage module connected between said positive electrode terminal and said negative electrode terminal,
said power storage module having a plurality of cells connected in series between said positive electrode terminal and said
negative electrode terminal,

said abnormality detection circuit including:
a voltage detection circuit configured to detect an electrical potential of an intermediate node located at an intermediate
position between said positive electrode terminal and said negative electrode terminal on a basis of a ground potential, said
intermediate node being a node between two cells located at an intermediate position between said positive electrode terminal
and said negative electrode terminal among said plurality of cells; and

a control circuit configured to determine said abnormality of said power storage module based on a change in a detection value
of said voltage detection circuit from said ground potential, said control circuit determining that said power storage module
is abnormal when said detection value is out of a predetermined reference range defined by an upper limit value higher than
said ground potential and a lower limit value lower than said ground potential value, said control circuit specifying said
abnormality occurring at a location between said negative electrode terminal and said intermediate node when said detection
value is higher than said upper limit value, said control circuit specifying said abnormality occurring at a location between
said positive electrode terminal and said intermediate node when said detection value is lower than said lower limit value.

US Pat. No. 9,863,992

FAULT DETECTING APPARATUS AND DETECTING METHOD OF THE SAME

TOSHIBA MITSUBISHI-ELECTR...

1. A fault detecting apparatus for detecting a fault in an electric circuit comprising a plurality of connecting circuits
and an aggregating circuit, the plurality of connecting circuits comprising positive electrode wires and negative electrode
wires connected parallel to respectively connect a plurality of DC power supplies with an inverter, and the aggregating circuit
being configured to aggregate the plurality of connecting circuits and to connect the aggregated connecting circuits with
the inverter, the apparatus comprising:
a plurality of connecting circuit current detectors configured to detect currents flowing through either the positive electrode
wires or the negative electrode wires of all the connecting circuits except one connecting circuit, respectively;

an aggregating current detector configured to detect a current flowing after the connection circuits are aggregated by the
aggregating circuit; and

a fault detector configured to detect a fault when at least one of the connecting circuit current detectors detects that a
current flows and if the aggregating current detector detects that a current does not flow.

US Pat. No. 9,866,120

POWER CONVERSION DEVICE

Mitsubishi Electric Corpo...

1. A power conversion device comprising a plurality of cell converters connected in series to each other,
each cell converter having: a main circuit including switching elements and a capacitor; a pair of external terminals for
leading the main circuit to outside; a bypass unit capable of making short circuit between the pair of external terminals;
a gate drive device for performing ON/OFF control of the switching elements, thereby for performing power conversion between
the pair of external terminals and the capacitor; and a self-power-feeding device for receiving voltage of the capacitor and
for feeding power to the gate drive device, the power conversion device comprising:

an energy storage unit for receiving and storing voltage of the self-power-feeding device; and
a bypass unit drive device for causing the bypass unit to perform short-circuiting operation by power stored in the energy
storage unit when voltage of the self-power-feeding device becomes smaller than a predetermined lower limit value.

US Pat. No. 9,859,782

POWER SUPPLY APPARATUS FOR POWER CONVERTERS

TOSHIBA MITSUBISHI-ELECTR...

1. A power supply apparatus for supplying power to a power system, the power supply apparatus comprising:
a first set of photovoltaic power cells configured to supply power to a power grid;
a second set of photovoltaic power cells configured to supply a voltage to a voltage regulator to supply control power for
controlling power converters; and

the power converters configured to convert the supplied power and supply the converted power to the power system.

US Pat. No. 9,806,630

POWER CONVERSION DEVICE

Mitsubishi Electric Corpo...

1. A power conversion device comprising:
a power converter for performing power conversion between three-phase AC, and DC, the power converter including a plurality
of leg circuits each having a positive arm and a negative arm connected in series, outputs of the positive arm and the negative
arm being connected to each phase AC line, the plurality of leg circuits being connected in parallel between positive and
negative DC buses; and

a control device for controlling the power converter, wherein
each of the positive arm and the negative arm of each leg circuit is composed of one or a plurality of converter cells connected
in series and including: a series unit of a plurality of semiconductor switching elements connected in series to each other;
and a DC capacitor connected in parallel to the series unit,

the control device includes a voltage command generating unit for generating a first voltage command for the positive arm
and a second voltage command for the negative arm, to perform output control for each converter cell in the positive arm and
the negative arm by PWM control,

the voltage command generating unit includes: an AC current control unit for generating an AC control command for controlling
an AC current component flowing through each phase AC line; a circulating current control unit for calculating a circulation
control command for controlling a circulating current component for each phase which circulates between the leg circuits;
and a command distributing unit for determining the first voltage command and the second voltage command on the basis of the
AC control command, the circulation control command, and a voltage command value for voltage between the DC buses,

the circulating current control unit includes: a compensator for calculating a first control command so that circulating current
for each phase which circulates between the leg circuits approaches a circulating current command value; and a suppression
unit for generating a second control command for suppressing at least one of a double-frequency component and a quadruple-frequency
component of an AC fundamental wave, which are contained in the calculated first control command, and

the circulating current control unit calculates the circulation control command by combining the first control command and
the second control command.

US Pat. No. 9,780,681

POWER CONVERSION SYSTEM INCLUDING PLURALITY OF POWER CONVERTERS CONNECTED IN PARALLEL TO LOAD

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion system, comprising:
first to N-th power converters connected in parallel to a load; and
first to (N?1)-th wirings, N being an integer equal to or larger than 2,
each power converter including:
a conversion circuit for converting an AC voltage into a DC voltage;
an inversion circuit for converting the DC voltage into an AC voltage and providing the AC voltage to said load;
a DC bus for supplying the DC voltage from said conversion circuit to said inversion circuit; and
a capacitor connected to said DC bus, for smoothing the DC voltage, wherein
an n-th wiring is connected between said DC bus of an n-th power converter and said DC bus of a (n+1)-th power converter,
and n is an integer equal to or larger than 1 and equal to or smaller than (N?1),

said power conversion system further comprising
a control circuit for stopping operation of said first to N-th power converters in response to a current of a value larger
than a predetermined value flowing through at least one of said first to (N?1)-th wirings.

US Pat. No. 9,767,227

MATERIAL STRUCTURE PREDICTION APPARATUS, PRODUCT MANUFACTURING METHOD AND MATERIAL STRUCTURE PREDICTION METHOD

TOSHIBA MITSUBISHI-ELECTR...

1. A material structure prediction apparatus predicting a structure of a material that exhibits phase transformation from
a mother phase to a precipitated phase in accordance with a temperature variation, the material structure prediction apparatus
comprising:
a temperature calculator configured to calculate temperatures at calculation points in a calculation target region of the
material, based on a temperature condition for applying the temperature variation to the material;

a nucleation count calculator configured to calculate a nucleation count in the calculation target region, based on the temperatures
at the calculation points calculated by the temperature calculator;

a precipitated phase generation point determining module configured to determine, from the calculation points, a precipitated
phase generation point where a nucleus of the precipitated phase is generated, based on the nucleation count calculated by
the nucleation count calculator;

a grain growth calculator configured to calculate a grain growth of the precipitated phase at the precipitated phase generation
point determined by the precipitated phase generation point determining module; and

a material structure prediction module configured to predict the structure of the material, based on the grain growth of the
precipitated phase calculated by the grain growth calculator.

US Pat. No. 9,762,142

ELECTRIC POWER CONVERTER WITH A VOLTAGE CONTROLLER AND A CURRENT CONTROLLER

MITSUBISHI ELECTRIC CORPO...

1. An electric power converter which converts a DC power to an AC power and produces a sinusoidal AC voltage and sinusoidal
AC current from an output terminal, comprising:
a reference voltage generator which generates a reference signal representing an AC voltage to which the DC power is to be
converted;

a voltage calculator which calculates, based on the reference signal, a target voltage;
a voltage-side controller which controls a voltage between a first terminal and the output terminal to be equal to or nearly
equal to the target voltage, whereby a voltage produced from the output terminal is a sinusoidal AC voltage;

a current detector which detects a present current flowing through the output terminal;
a current calculator which calculates, based on the target voltage and the present current, a target current to be flowing
from a second terminal to the output terminal; and

a current-side controller which controls the current flowing from the second terminal to the output terminal to be equal to
or nearly equal to the target current,

wherein said voltage calculator calculates the following equation:
Vtar=Vpc?k*Vref
wherein Vtar is the target voltage between the first terminal and the output terminal, Vpc is a voltage between the first
terminal and a center terminal, which is a center of the DC power, Vref is a voltage of the reference signal, and k is a predetermined
constant.

US Pat. No. 9,755,457

UNINTERRUPTIBLE POWER SUPPLY APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. An uninterruptible power supply apparatus provided with a plurality of uninterruptible power modules connected in parallel
between an AC power source and a load, and a bypass circuit,
said uninterruptible power modules each including:
a converter for converting AC power supplied from said AC power source into DC power;
a power storage device for storing the DC power converted by said converter;
an inverter for converting DC power supplied from said converter or said power storage device into AC power;
a housing for housing said converter and said inverter;
a cooling fan for cooling the interior of said housing; said housing being formed with an opening, and said opening and an
opening formed in an adjacent housing for housing another uninterruptible power module being configured to face each other,
and

a fan control circuit for controlling said cooling fan, said fan control circuit being configured to control the actuation
and suspension of said cooling fan on the basis of a total load of said plurality of uninterruptible power modules.

US Pat. No. 9,755,551

POWER CONVERSION DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion device comprising:
a plurality of 3-level converters that are multiple-connected in series to an AC power supply; and
a control device configured to control operations of the plurality of 3-level converters,
each of the plurality of 3-level converters being arranged between the AC power supply and each of a DC positive bus, a DC
negative bus and a DC neutral point bus, and configured to convert a DC voltage into an AC voltage having three voltage values,

a first capacitor and a second capacitor being connected in series between the DC positive bus and the DC negative bus, and
a connection point between the first capacitor and the second capacitor being connected to the DC neutral point bus, and

the control device including
a calculation unit configured to calculate an output voltage command for the plurality of 3-level converters,
a carrier signal generation unit configured to generate a carrier signal,
a correction unit configured to correct a phase of the carrier signal based on a potential variation on the DC neutral point
bus, and

a pulse width modulation control unit configured to (i) delay the phase by a prescribed amount based on the carrier signal
having the phase corrected by the correction unit as a reference phase to generate a plurality of carrier signals, and (ii)
compare the output voltage command and each of the plurality of carrier signals to generate a control command for each of
the plurality of 3-level converters.

US Pat. No. 9,689,622

HEAT TRANSFER DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A heat transfer device transferring heat to a pipe line in which a fluid flows, comprising:
a heat transfer block of high heat conductivity, surrounding said pipe line,
a heat pipe formed in said heat transfer block, along an extending direction of said pipe line, and
a heater applying heat to said heat pipe,
said heat transfer block including a plurality of divided blocks dividable along the extending direction of said pipe line,
a proximity portion where said heat transfer block is in proximity to said pipe line being provided at both ends of said heat
transfer block in the extending direction of said pipe line.

US Pat. No. 10,103,674

DRIVE CONTROL APPARATUS FOR MULTIPLE-WINDING MOTOR

TOSHIBA MITSUBISHI-ELECTR...

1. A drive control apparatus for a multiple-winding motor having a plurality sets of winding groups,corresponding to each of the winding groups, the drive control apparatus comprising
a power converter driving a winding group,
a current detector detecting a current in the winding group and
a controller controlling the power converter for driving the winding group by obtaining a voltage command value for controlling the power converter based on a current deviation between a current value of the winding group which is detected by the current detector and a current command value of the winding group which is inputted, and
the drive control apparatus further comprising a compensation amount calculator which obtains, by using a signal of a first controller controlling a first power converter driving a first winding group among the winding groups, a compensation amount for compensating a signal of other controller controlling other power converter other than the first power converter,
wherein based on the compensation amount which is obtained by the compensation amount calculator, a signal of the other controller is compensated and the other power converter is controlled, and the first power converter is controlled without compensating a signal of the first controller, and
wherein regarding a control system from the current command value of the first winding group to a current of the first winding group, in a case where a control gain of the other controller is set to the same as a value of a control gain which is set as a control gain of the first controller, a phase delay of the control system at a zero crossing frequency of the gain is 180 degrees or more, a control gain of other controller is set to be equal to or smaller than a control gain which is set as a control gain of the first controller and, by using a signal of the first controller, the compensation amount calculator obtains the compensation amount for compensating a signal of the voltage command value of the other controller or a signal of the current command value of the other controller.

US Pat. No. 10,041,980

THREE-DIMENSIONAL SURFACE POTENTIAL DISTRIBUTION MEASUREMENT APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A three-dimensional surface potential distribution measurement apparatus to measure a surface potential of an electric field relaxation system which is formed along a longitudinal direction of a test object simulating a stator coil end of a rotating electrical machine, the apparatus comprising:a laser light source configured to emit laser light;
a Pockels crystal configured to receive, at its first end face, the laser light emitted from the laser light source;
a mirror having a mirror surface positioned at a second end face of the Pockels crystal that is opposed to the first end face, the mirror being configured to reflect the laser light from the one end face of the Pockels crystal in a direction opposite to the incident direction of the laser light;
a light detector having a band following a high-frequency component of an inverter pulse voltage, the light detector being configured to receive the laser light reflected by the mirror, and to detect a light intensity of the laser light corresponding to an output voltage which is a potential difference between the first end face of the Pockels crystal and the second end face thereof;
a support structure configured to support the laser light source, the Pockels crystal, the mirror, and the light detector while maintaining a relative positional relationship thereamong;
a movement driver capable of three-dimensionally moving the support structure;
a rotary driver configured to support the test object, the rotary driver being capable of rotating the test object about an axis extending in a longitudinal direction of the test object in both clockwise and counterclockwise directions; and
a drive controller configured to control the movement driver and the rotary driver, wherein
the drive controller coordinates a driving operation by the movement driver and a driving operation by the rotary driver while maintaining a gap between the second end face of the Pockels crystal and a surface of the test object at a predetermined value such that the second end face of the Pockels crystal approaches the surfaces of the electric field relaxation system on the test object.

US Pat. No. 9,935,473

STORAGE BATTERY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A storage battery system connected to a power system and operative based on a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:a storage battery;
battery management circuitry configured to monitor a state of the storage battery;
a power conditioning system configured to convert AC power of the power system into DC power and charge the storage battery with the DC power and to convert DC power of the storage battery into AC power and discharge the AC power to the power system;
control circuitry configured to receive the charge/discharge request from the energy management system that manages electric power supply/demand of the power system and receive storage battery information supplied from the battery management circuitry and to control the power conditioning system based on the charge/discharge request and the storage battery information; and
an on-site monitoring and operating device directly connected to the control device, the on-site monitoring and operating device including a display configured to display the storage battery information and operation circuitry configured to enable an on-site charge/discharge request to the power conditioning system to be input, wherein
the control circuitry further includes on-site request adjustment circuitry configured to receive the on-site charge/discharge request and the storage battery information and to determine a charge/discharge command to the power conditioning system based on the on-site charge/discharge request and the storage battery information, and
wherein the control circuitry is configured to override specific values of the charge/discharge request or the on-site charge/discharge request when determining the charge/discharge command to the power conditioning system.

US Pat. No. 9,906,074

POWER SUPPLY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A power supply system, comprising:
an uninterruptable power-supply apparatus supplying power to a load, said uninterruptable power-supply apparatus including
a converter converting an AC input power into a DC power and an inverter converting said DC power into an AC output power
to supply said AC output power to said load;

a first switch connecting a bypass power supply to said load; and
a switching circuit turning said first switch on when said uninterruptable power-supply apparatus is stopped, wherein
in a case where said uninterruptable power-supply apparatus is stopped due to a failure of said inverter, said switching circuit
turns said first switch on when a phase of an output voltage of said bypass power supply is equal to a phase of an output
voltage of said uninterruptable power-supply apparatus at a stopped timing, and

wherein the switching circuit turns on said first switch at approximately the same time as when said uninterruptable power-supply
apparatus is stopped, and the bypass power supply is an AC voltage supply,

wherein said switching circuit includes
a first phase detector detecting a phase of an output voltage of said uninterruptable power-supply apparatus,
a storage storing the phase of the output voltage at a stopped timing of said uninterruptable power-supply apparatus,
a second phase detector detecting a phase of an output voltage of said bypass power-supply, and
a switch controller,
wherein said switch controller compares the phase of the output voltage of said uninterruptable power-switch apparatus stored
in said storage with the phase of the output voltage of said bypass power-supply detected by said second phase detector, and
turns on said first switch when the phase of the output voltage of said bypass power-supply matches with the phase of the
output voltage of said uninterruptable power-supply apparatus, and

wherein said switch controller periodically acquires a value of the phase of the output voltage stored in said storage, and
determines, based thereon, whether said uninterruptable power-supply apparatus is operated or stopped.

US Pat. No. 9,899,903

POWER CONVERSION DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion device comprising:
an inverter which includes a switching device, receives DC voltage of a DC voltage source, converts the DC voltage to variable-voltage
variable-frequency AC voltage, and outputs the AC voltage to a load; and

a control unit for performing PWM control for ON/OFF driving of the switching device on the basis of an output voltage command
value and an output frequency command value, wherein

the control unit includes:
a modulation rate calculator for calculating a modulation rate for the inverter on the basis of the DC voltage of the DC voltage
source and the output voltage command value;

a pulse number determination unit for determining a number of pulses per half cycle of a fundamental wave in the PWM control
on the basis of the output frequency command value;

a switching pattern determination unit for obtaining, in advance, through calculation, a switching pattern specifying switching
phases each of which is a timing of ON/OFF driving the switching device, in accordance with the modulation rate and the number
of pulses, and stores the switching pattern for each modulation rate and for each number of pulses; and

a gate signal generation unit for reading, from the switching pattern determination unit, the switching pattern corresponding
to the modulation rate from the modulation rate calculator and the number of pulses from the pulse number determination unit,
and generating a gate signal for ON/OFF driving the switching device, on the basis of the switching pattern, and

the switching pattern determination unit includes:
a modulation rate ensuring unit for generating a first function which is a function for ensuring the modulation rate and which
associates a fundamental wave component of an output waveform of the inverter with the modulation rate and has the switching
phases as variables;

a harmonic reducing unit for generating a second function which is a function for reducing a harmonic component in the output
waveform of the inverter and which is an addition value of harmonic elements of respective orders determined by harmonic components
of respective orders in the output waveform of the inverter, and has the switching phases as variables;

a function combining unit for setting a third function which is formed from the first function, the second function, and one
or more additional variables, and has the switching phases and the additional variables as variables;

a switching phase calculation unit for calculating the switching phases that ensures the modulation rate and reduces the addition
value of the harmonic elements of respective orders, by minimizing the third function with respect to the switching phases
and the additional variables; and

a switching pattern storage unit for storing the switching pattern specified by the calculated switching phases, for each
modulation rate and for each number of pulses.

US Pat. No. 9,843,272

POWER CONVERTER CAPABLE OF OUTPUTTING A PLURALITY OF DIFFERENT LEVELS OF VOLTAGES

TOSHIBA MITSUBISHI-ELECTR...

1. A power converter comprising:
a first charge storage element to a 2nth charge storage element connected in this order to form a circuit of 2n charge storage elements, n being a natural number of 2 or more;

a first switch element and a first diode connected in this order between terminals of said first charge storage element;
a second diode and a second switch element connected in this order between terminals of said 2nth charge storage element;

a third diode and a fourth diode connected in this order between terminals of each of the second charge storage element to
a 2n?1th charge storage element;

the first, second, third, and fourth diodes defining a circuit of 2n+1?2 diodes, the circuit of the 2n charge storage elements and the circuit of the 2n+1?2 diodes being connected in parallel to each other via the first switch element and the second switch element;

2n leads each connected to a node between said first switch element and said first diode, a node between said third diode and
said fourth diode, and a node between said second diode and said second switch element; and

2n?1 switch circuits for selecting one of outputs output to said 2n leads,

said 2n?1 switch circuits being connected to select one of two adjacent said leads, and being connected such that two of said switch
circuits are connected in a previous stage and the remaining said switch circuit is connected in a following stage to select
one of outputs from two said switch circuits connected in said previous stage and controlled such that the power converter
outputs an alternating current (AC) voltage by outputting a plurality of direct current (DC) voltages that increase monotonically
as the AC voltage increases and decrease monotonically as the AC voltage decreases.

US Pat. No. 9,727,931

ELECTRICITY DEMAND PREDICTION SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. An electricity demand prediction system which is applied to an industrial plant including a plurality of devices, comprising:
a first collection device for collecting electricity usage data of each of the devices and causing first storage device to
store the collected electricity usage data;

a second storage device in which a production schedule in the industrial plant is stored;
a model creation device for creating an electricity amount calculation model of each prescribed product type for each of the
devices based on the electricity usage data stored in the first storage device and a past production schedule stored in the
second storage device;

a first prediction device for computing future electricity demand for each of the devices based on the electricity amount
calculation model created by the model creation device and a future production schedule stored in the second storage device
and for adding up the computed future electricity demand of each of the devices to compute future electricity demand of the
industrial plant;

a second collection device for collecting electricity usage data of the industrial plant and causing third storage device
to store the collected electricity usage data;

a second prediction device for computing future electricity demand of the industrial plant based on the electricity usage
data stored in the third storage device; and

a third prediction device for computing future electricity demand of the industrial plant for a prescribed first period based
on the electricity demand of the industrial plant computed by the first prediction device and the electricity demand of the
industrial plant computed by the second prediction device and for computing future electricity demand of the industrial plant
for a prescribed second period later than the prescribed first period based on the electricity demand of the industrial plant
computed by the second prediction device without using the electricity demand of the industrial plant computed by the first
prediction device, wherein the electricity demand prediction system reduces an amount of electricity by applying the future
electricity demand computed for the prescribed first and second periods.

US Pat. No. 9,762,143

DEVICES AND METHODS FOR CONTROLLING CURRENT IN INVERTERS

Toshiba Mitsubishi-Electr...

1. An inverter controller configured to control inverters being provided with capacitors and first switches on DC sides, respectively,
the DC sides of the inverters being connected in parallel AC sides of the inverters being connected in parallel, comprising:
a first start-time controller configured to perform first start-time control of closing the first switch of a first inverter
of the inverters and turning on at least a first switching element provided at the first inverter to charge the respective
capacitors of the inverters at the time of starting the inverters; and

a second start-time controller configured to perform second start-time control of closing the respective first switches of
the other inverters after the respective capacitors of the inverters are charged by the first start-time control by the first
start-time controller.

US Pat. No. 9,954,135

SOLAR CELL MANUFACTURING METHOD

Toshiba Mitsubishi-Electr...

1. A method for manufacturing solar cell, comprising:(A) preparing a silicon substrate of p-type conductivity;
(B) forming an aluminum oxide passivation film on a main surface of said silicon substrate by spraying a misted solution containing aluminum elements onto said main surface of said silicon substrate at atmospheric pressure while supplying ozone to said silicon substrate; and
(C) producing a solar cell using said silicon substrate including said passivation film formed thereon,
wherein said misted solution is obtained by applying ultrasonic waves to a solution containing aluminum elements.

US Pat. No. 10,145,902

STORAGE BATTERY CAPACITY MEASUREMENT DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A storage battery capacity measurement device provided in in-plant equipment including a storage battery system connected to an intra-equipment electric wire,wherein the intra-equipment electric wire is connected to a power system,
wherein the storage battery system includes a plurality of storage batteries connected in parallel to the intra-equipment electric wire,
wherein the in-plant equipment includes a switch capable of switching an electrical connection of the power system and the intra-equipment electric wire to either one of a connected state or a disconnected state, and
wherein each of the plurality of storage batteries is connected to an individual power conditioning system,
the storage battery capacity measurement device comprising:
a processor to execute a program; and
a memory to store the program which, when executed by the processor, results in performance of steps comprising,
a) determining one storage battery among the plurality of storage batteries as a measurement target storage battery, and at least one storage battery other than the measurement target storage battery as a measurement support storage battery,
b) switching to the disconnected state,
c) operating the power conditioning system connected to the measurement support storage battery in an autonomous operation mode, in the disconnected state,
d) discharging an electricity amount of the measurement target storage battery from an upper limit to a lower limit, and charging the discharged electricity amount to the measurement support storage battery, and
e) calculating a discharge capacity of the measurement target storage battery, on a basis of an integrated value of a current flowing through the measurement target storage battery during discharge, and
wherein the autonomous operation mode is a mode of automatically charging and discharging the measurement support storage battery so as to balance electric power supply/demand of the intra-equipment electric wire.

US Pat. No. 10,040,107

TEMPERATURE CONTROL APPARATUS OF HOT-ROLLING MILL

TOSHIBA MITSUBISHI-ELECTR...

1. A temperature control apparatus of a hot-rolling mill having: a rolling stand that rolls a rolled material; a water cooling device that cools the rolled material; an induction heating device that heats the rolled material; a speed changing device that changes a roll rotation speed of the rolling stand; a flow rate changing device that changes a cooling water flow rate of the water cooling device; and an electric power changing device that changes electric power of the induction heating device, the temperature control apparatus comprising:a setup calculating device that calculates an initial value of each of a reference value of electric power with respect to the electric power changing device, a reference value of a cooling water flow rate with respect to the flow rate changing device, and a reference value of a roll rotation speed with respect to the speed changing device, based on given manufacturing instruction information;
an outlet-side temperature calculating device that calculates temperatures of a plurality of calculation points of the rolled material in a longitudinal direction at time points when the calculation points arrive at a temperature managing position set on an outlet side of the hot-rolling mill, based on a measured temperature or a calculated temperature of each calculation point at an inlet side of the hot-rolling mill, the roll rotation speed of the rolling stand, the electric power of the induction heating device, and the cooling water flow rate of the water cooling device;
a frequency component extracting device that extracts a high-frequency component, a medium-frequency component, and a low-frequency component from a deviation between the outlet-side temperature of each calculation point calculated by the outlet-side temperature calculating device and a given temperature target value;
an electric power setting correcting device that corrects the reference value of the electric power with respect to the electric power changing device based on the high-frequency component;
a flow rate setting correcting device that corrects the reference value of the cooling water flow rate with respect to the flow rate changing device based on the medium-frequency component; and
a speed setting correcting device that corrects the reference value of the roll rotation speed with respect to the speed changing device based on the low-frequency component.

US Pat. No. 10,014,718

UNINTERRUPTIBLE POWER SOURCE

TOSHIBA MITSUBISHI-ELECTR...

1. An uninterruptible power source connected between (i) each of an AC power source and a bypass AC power source and (ii) a load, the uninterruptible power source comprising:an input terminal configured to receive AC power from the AC power source;
a bypass terminal configured to receive AC power from the bypass AC power source;
an output terminal configured to output AC power to the load;
a converter configured to rectify the AC power provided to the input terminal into DC power;
an inverter configured to invert DC power output by the converter or DC power output by a power storage device into AC power, and to output the AC power to the output terminal;
a power conversion controller configured to control the power conversion in each of the converter and the inverter;
a bypass switch having one terminal connected to the output terminal;
a first switch connected between the bypass terminal and the other terminal of the bypass switch;
a second switch connected between (i) a first node located between the input terminal and an AC terminal of the converter and (ii) the other terminal of the bypass switch;
a third switch connected between the input terminal and the first node; and
a switching controller configured to control on/off of the bypass switch and the first to third switches,
the uninterruptible power source having (i) a first operation mode in which AC power is supplied from the inverter to the load and (ii) a second operation mode in which AC power is supplied from the AC power source or the bypass AC power source to the load via the bypass switch, the uninterruptible power source being configured to change over to the first operation mode when power failure occurs to stop supply of the AC power from the AC power source or the bypass AC power source during the second operation mode,
during the second operation mode, the switching controller being configured to (i) turn on the bypass switch, the second switch, and one of the first and third switches in a normal state in which the AC power is normally supplied from the AC power source or the bypass AC power source, and (ii) turn off the bypass switch during the power failure,
when turning off the bypass switch by the switching controller, the power conversion controller being configured to (i) control the converter to invert the DC power output by the power storage device into AC power and output the AC power to the first node, (ii) control the inverter to invert the DC power output by the power storage device into AC power and output the AC power to the output terminal, and (iii) control the inversions in the converter and the inverter such that phase and magnitude of an AC voltage output to the first node become equal to phase and magnitude of an AC voltage output to the output terminal.

US Pat. No. 9,960,709

POWER CONVERSION DEVICE

Mitsubishi Electric Corpo...

1. A power conversion device comprising:a power converter for performing power conversion between three-phase AC and DC, the power converter including a plurality of leg circuits each having a positive arm and a negative arm which are connected in series and are connected to an AC line for each phase, the plurality of leg circuits being connected in parallel between positive and negative DC buses; and
a control device for controlling the power converter, wherein
each of the positive arm and the negative arm of each leg circuit includes a converter cell composed of: a series unit including a plurality of semiconductor switching elements connected in series to each other; and a DC capacitor connected in parallel to the series unit,
the control device includes a voltage command generation unit for generating a positive arm voltage command for the positive arm and a negative arm voltage command for the negative arm, and performs output control of each converter cell in the positive arm and the negative arm by PWM control,
the voltage command generation unit includes:
an AC current control unit for calculating an AC control command for controlling an AC current component flowing through the AC line for each phase;
an arm balance control unit for, on the basis of positive capacitor voltage which is voltage of the DC capacitor in the positive arm and negative capacitor voltage which is voltage of the DC capacitor in the negative arm, calculating a first voltage adjustment value for balancing the positive capacitor voltage and the negative capacitor voltage;
an AC-side command calculation unit for outputting an AC voltage command for AC voltage to be outputted to the AC line for each phase; and
a command distributing unit for determining the positive arm voltage command and the negative arm voltage command on the basis of the AC voltage command and a DC voltage command for DC voltage between the DC buses, and
the AC-side command calculation unit calculates the AC voltage command by adjusting the AC control command using the first voltage adjustment value.

US Pat. No. 9,912,259

THYRISTOR STARTING DEVICE AND CONTROL METHOD THEREFOR

TOSHIBA MITSUBISHI-ELECTR...

2. A control method for a thyristor starting device, said thyristor starting device including:
a converter which converts AC power supplied from an AC power source into first DC power,
a DC reactor which smooths a first DC current corresponding to the first DC power,
an inverter which converts the first DC power provided from said converter through said DC reactor into AC power, and supplies
the AC power to a synchronous machine,

a gate pulse generation circuit which generates a gate pulse to be provided to thyristors of said converter and said inverter,
an AC current detector which detects an AC current supplied from said AC power source,
and a rectification circuit which rectifies an output of said AC current detector to produce a second DC current, said control
method comprising the steps of:

setting a phase control angle of the gate pulse to be provided to the thyristors of said converter, by controlling a current
of said converter such that the first DC current flowing into said DC reactor matches a current command value;

setting an upper limit value and a lower limit value of an acceptable range on a high-current side and a low-current side,
respectively, relative to said current command value;

comparing a detection value of the second DC current with said upper limit value and said lower limit value, and in response
to a determination that the first DC current flowing into the DC reactor deviates from the acceptable range, providing a signal
to a first timer:

measuring, using the first timer, a first time for which the signal is received by the first timer and resetting the first
timer when the signal stops;

measuring, using a second timer, a second time that has elapsed since reception of a start command for the thyristor starting
device;

determining an abnormality in the gate pulse when the measured first time reaches a prescribed time and the measured second
time exceeds a fixed time, and feedback-controlling the first DC current based on a deviation between said current command
value and the second DC current.

US Pat. No. 10,124,381

ROLLING PROCESS LEARNING CONTROL DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A rolling process learning control device that has a database including a plurality of cells that divide rolling conditions, and manages using the database a learning coefficient of a model expression used for setup calculation of a rolling process, the rolling process learning control device comprising:a processor to execute a program; and
a memory to store the program which, when executed by the processor, causes the rolling process learning control device to serve as:
an instantaneous value calculation recording unit that calculates an instantaneous value of the learning coefficient based on a gap between a result value measured in the rolling process and a result recalculation value calculated using the model expression, and records the instantaneous value in a cell corresponding to present rolling conditions together with a learning time;
an update value calculation recording unit that calculates an update value of the learning coefficient based on the instantaneous value and a previous value of the learning coefficient in the present rolling conditions, and records the update value in the cell corresponding to the present rolling conditions together with a learning time;
a recency evaluation unit that evaluates recency of the learning coefficient of each of the plurality of cells based on history information of the update value stored in the database;
a saturation evaluation unit that evaluates saturation of the learning coefficient of each of the plurality of cells based on the history information of the update value stored in the database;
a stability evaluation unit that evaluates stability of the learning coefficient of each of the plurality of cells based on history information of the instantaneous value stored in the database;
a neighboring cell selection unit that selects a predetermined number of neighboring cells in order of a spatial distance from a target cell corresponding to next rolling conditions in a space having rolling conditions as coordinate axes, from the cells in which respective evaluation results of the recency, the saturation, and the stability satisfy criteria;
an estimation value calculation unit that decides representative values of the learning coefficients in the selected predetermined number of neighboring cells, respectively, and calculates an estimation value of the learning coefficient in the target cell by polynomial interpolation based on a coordinate of the target cell, and coordinates and the representative values of the selected predetermined number of neighboring cells; and
an use value decision unit that corrects the most recent update value of the learning coefficient in the target cell with the estimation value, and decides a corrected value as a use value of the learning coefficient in the next rolling conditions.

US Pat. No. 10,044,286

POWER CONVERSION SYSTEM INCLUDING PLURALITY OF POWER CONVERTERS CONNECTED IN PARALLEL TO LOAD

TOSHIBA MITSUBISHI-ELECTR...

1. A power conversion system, comprising:first to N-th power converters connected in parallel to a load; and
first to (N?1)-th fuses, N being an integer equal to or larger than 2,
each power converter including:
a conversion circuit for converting an AC voltage into a DC voltage;
an inversion circuit for converting the DC voltage into an AC voltage and providing the AC voltage to said load;
a DC bus for supplying the DC voltage from said conversion circuit to said inversion circuit; and
a capacitor connected to said DC bus, for smoothing the DC voltage,
wherein an n-th fuse is connected between said DC bus of an n-th power converter and said DC bus of a (n+1)-th power converter by an n-th wiring, and n is an integer equal to or larger than 1 and equal to or smaller than (N?1),
wherein a fuse other than said n-th fuse is not connected on said n-th wiring between said DC bus of said n-th power converter and said DC bus of bus of said (n+1)-th power converter, and
wherein if a failure occurs in one of said n-th or (n+1)-th power converter, said n-th fuse is configured to protect other one of said n-th or (n+1)-th power converter.

US Pat. No. 10,041,990

WATER TREE TESTING METHOD AND WATER TREE TESTING APPARATUS

TOSHIBA MITSUBISHI-ELECTR...

1. A water tree testing apparatus to reproduce a water tree phenomenon for a water tree resistance evaluation of a candidate insulation material by using a flat test piece of the candidate material, the test piece having a first surface in which a plurality of electrode holes are formed, the electrode holes being formed to decrease in cross section as approaching a bottom perpendicularly to the surface, the water tree testing apparatus comprising:a liquid-permeable conductive first permeable member that is attached to the first surface and extends along the first surface to cover the electrode holes;
a liquid-permeable conductive second permeable member that is attached to a second surface that is opposite side from the first surface, and extends along the second surface as to face the first permeable member with the test piece therebetween;
a first water tank that contains a first aqueous solution so that the first surface of the test piece including a range covered by the first permeable member is immersed in the first aqueous solution;
a second water tank that contains a second aqueous solution so that the second surface of the test piece including a range covered by the second permeable member is immersed in the second aqueous solution;
a first electrode whose one end is electrically connected to the first permeable member; and
a second electrode whose one end is electrically connected to the second permeable member, wherein
the first electrode and the second electrode are formed so that a voltage is applicable therebetween.

US Pat. No. 10,044,200

STORAGE BATTERY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A storage battery system connected to a power system and operative based on a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:a plurality of storage battery modules connected in parallel;
a plurality of storage battery management units that are provided to each of the plurality of storage battery modules and are configured to monitor charge states of the plurality of storage battery modules;
a power conditioning system having a function of converting AC power of the power system into DC power and charging the plurality of storage battery modules with the DC power and a function of converting DC power of the plurality of storage battery modules into AC power and discharging the AC power to the power system; and
a control device configured to receive the charge/discharge request and storage battery information including cell voltage information supplied from the plurality of storage battery management units and to control the power conditioning system based on the charge/discharge request and the storage battery information including the cell voltage information, wherein
the control device includes a charge/discharge command unit configured to calculate chargeable/dischargeable electric power based on the storage battery information including the cell voltage information and to determine a charge/discharge command to the power conditioning system based on the charge/discharge request by using the chargeable/dischargeable electric power as a constraint condition.

US Pat. No. 10,116,228

CONVERTER AND POWER CONVERSION DEVICE MANUFACTURED USING THE SAME

TOSHIBA MITSUBISHI-ELECTR...

1. A converter configured to convert an AC voltage applied to an input terminal into a first DC voltage, a second DC voltage and a third DC voltage, and output the first DC voltage, the second DC voltage and the third DC voltage through a first output terminal, a second output terminal and a third output terminal, respectively, the converter comprising:a first transistor having a first electrode and a second electrode that are connected to the first output terminal and the input terminal, respectively;
a second transistor having a first electrode and a second electrode that are connected to the input terminal and the second output terminal, respectively;
a first diode and a second diode connected in anti-parallel to the first transistor and the second transistor, respectively; and
a first bidirectional switch connected between the input terminal and the third output terminal,
the first DC voltage being higher than the second DC voltage, and the third DC voltage being an intermediate voltage between the first DC voltage and the second DC voltage,
the first bidirectional switch including a third transistor, a fourth transistor, a third diode, and a fourth diode,
each of the first diode, the second diode, the third transistor, and the fourth transistor being formed of a wide band gap semiconductor,
each of the third diode, the fourth diode, the first transistor, and the second transistor being formed of a semiconductor other than the wide band gap semiconductor, and
each of the first diode and the second diode being greater in rated current than each of the third diode, the fourth diode, the first transistor, the second transistor, the third transistor, and the fourth transistor.

US Pat. No. 10,095,199

ENERGY CONSUMPTION PREDICTING DEVICE FOR ROLLING LINE

TOSHIBA MITSUBISHI-ELECTR...

1. An energy consumption predicting device for a rolling line having a facility operating on a material to be rolled, the device comprising:a setting calculation unit configured to define various set operating values of the facility based on operating conditions corresponding to the material to be rolled;
an actual value collection unit configured to collect various actual operating values with respect to a result of operation of the facility based on the various set operating values;
an actual energy consumption value acquisition unit configured to integrate the various actual operating values, with a section where the facility operates on the material to be rolled being used as an integration section, to acquire an actual value of energy consumption;
an actual energy consumption calculation unit configured to input, into a model expression that defines relation between the various operating values of the facility and energy consumption of the facility, the various actual operating values as the various operating values, to calculate an actual calculation value of the energy consumption;
an energy consumption learning value calculation unit configured to divide the actual value by the actual calculation value to calculate a reference learning value of the energy consumption;
a pseudo-actual energy consumption calculation unit configured to input the set operating value defined by the setting calculation unit only in one operating value, among various operating values of the model expression, while inputting the actual operating values collected by the actual value collection unit n other operating values to calculate a pseudo-actual calculation value of the energy consumption; and
a correction learning value calculation unit configured to divide the actual calculation value by the pseudo-actual calculation value to calculate a correction learning value, wherein
the setting calculation unit inputs the various set operating values as the various operating values of the model expression to calculate a prediction value of the energy consumption for the material to be rolled, which is scheduled to be conveyed to the rolling line next time or later, and multiplies the prediction value by the reference learning value and the correction learning value to calculate a corrected prediction value of the energy consumption.

US Pat. No. 10,084,341

UNINTERRUPTIBLE POWER SOURCE

TOSHIBA MITSUBISHI-ELECTR...

1. An uninterruptible power source connected between an AC power source and a load, the uninterruptible power source comprising:a converter configured to rectify AC power supplied from the AC power source into DC power;
an inverter configured to invert the DC power output by the converter or DC power output by a power storage device into AC power, and to supply the AC power to the load;
a bypass circuit including a semiconductor switch and a contactor connected in parallel between the AC power source and the load;
a power conversion controller configured to control the power conversion in each of the converter and the inverter; and
a switching controller configured to control on/off of the semiconductor switch and the contactor,
the uninterruptible power source having (i) a first operation mode in winch AC power is supplied from the inverter to the load and (ii) a second operation mode in which AC power is supplied from the AC power source to the load via the bypass circuit, the uninterruptible power source being configured to change over to the first operation mode when voltage drop of the AC power source is detected during the second operation mode,
in the second operation mode, the switching controller being configured to turn on the contactor and turn off the semiconductor switch, and being configured to turn on the semiconductor switch and then turn off the contactor when a degree of voltage drop of the AC power source reaches a first threshold value,
when the degree of voltage drop of the AC power source reaches the second threshold value smaller than the first threshold value during the second operation mode, the power conversion controller being configured to (i) control the inverter to invert the DC power output by the power storage device into AC power and (ii) control the inversion in the inverter to synchronize the AC voltage output from the inverter to the AC voltage supplied from the AC power source,
the switching controller being configured to turn of the semiconductor witch when the power conversion controller controls the inverter to perform the inversion after turning off the contactor.

US Pat. No. 10,055,477

DATA COLLECTION APPARATUS AND DATA COLLECTION PROGRAM

TOSHIBA MITSUBISHI-ELECTR...

1. A data collection apparatus comprising:a common memory configured to store data which are sent among multiple control apparatuses by scan transmission;
a group selector configured to divide a memory area in the common memory into multiple groups, to further divide a memory area in each group into multiple subgroups, and to select one or more of the subgroups, as collection groups from which data is continuously read, in order to avoid decrease in a readout speed of the data on the basis of a data transfer rate characteristic corresponding to a size of the data;
a schedule generator configured to generate a schedule for reading the data from the common memory in allotted time intervals by determining a number of collection groups in the allotted time intervals for each of a high-speed collection, a middle-speed collection, and a low-speed collection, the number of collection groups being determined as an integer value on the basis of a division value obtained by dividing a number of subgroups selected as collection groups by collection cycles for collecting the data, the high-speed collection being faster than the middle-speed collection, the middle-speed collection being faster than the low-speed collection;
a time calculator configured to calculate as a needed readout time, a value based on a data transfer rate and the number of collection groups per allotted time interval in the schedule generated by the schedule generator;
a judgment circuit configured to judge whether or not the readout of the data can be completed within a corresponding allotted time interval, on the basis of the needed readout time calculated by the time calculator; and
a data reader configured to read the data from the common memory, only if the judgement circuit judges that the readout of the data can be completed within the allotted time interval.

US Pat. No. 10,038,392

INVERTER

TOSHIBA MITSUBISHI-ELECTR...

1. An inverter configured to convert a first DC voltage applied to a first input terminal, a second DC voltage applied to a second input terminal, and a third DC voltage applied to a third input terminal into a three-level AC voltage, and output the three-level AC voltage through an output terminal, the inverter comprising:a first transistor having a first electrode and a second electrode that are connected to the first input terminal and the output terminal, respectively;
a second transistor having a first electrode and a second electrode that are connected to the output terminal and the second input terminal, respectively;
a first diode and a second diode connected in anti-parallel to the first transistor and the second transistor, respectively; and
a bidirectional switch connected between the third input terminal and the output terminal,
the first DC voltage being higher than the second DC voltage, and the third DC voltage being an intermediate voltage between the first DC voltage and the second DC voltage,
the bidirectional switch including a third transistor, a fourth transistor, a third diode, and a fourth diode,
each of the first transistor, the second transistor, the third diode, and the fourth diode being formed of a wide band gap semiconductor,
each of the third transistor, the fourth transistor, the first diode, and the second diode being formed of a semiconductor other than the wide band gap semiconductor, and
each of the first transistor and the second transistor being greater in rated current than each of the third transistor, the fourth transistor, the first diode, the second diode, the third diode, and the fourth diode.

US Pat. No. 10,016,785

OXIDE FILM DEPOSITION METHOD AND OXIDE FILM DEPOSITION DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A method for forming an oxide film on a substrate, the method comprising:(A) forming a raw material mist from a raw material solution comprising an alkyl compound, and ejecting the raw material mist to a substrate in the presence of atmosphere,
wherein the alkyl compound is selected from the group consisting of diethyl zinc, dimethyl zinc, dimethyl magnesium, diethyl magnesium, biscyclopentadienyl magnesium, trimethyl aluminum, triethyl aluminum, trimethyl gallium, triethyl gallium, trimethyl indium, triethyl indium, tetramethyl silane, tetraethyl silane, trimethyl silane, triethyl silane, dimethyl silane and diethyl silane;
(B) supplying an oxidizing agent that exerts an oxidizing effect on said alkyl compound to ejected raw material mist in a spotted manner toward the ejected raw material mist, to form an oxide film on the substrate, such that the raw material mist is mixed with the oxidizing agent in a mixing region located at a path through which the raw material mist is ejected and then goes toward an area smaller than an upper surface area of the substrate; and
(C) ejecting an inert gas to a surrounding area of the ejected raw material mist,
wherein:
the substrate does not include a substrate arranged in a reaction vessel;
a point from which the raw material mist is ejected is a greater distance from the upper surface of the substrate, compared to a point from which the oxidizing agent is supplied to the mixing region; and
the ejecting of the inert gas occurs such that the inert gas enters the mixing region at about the same angle as an angle at which the raw material mist enters the mixing region.

US Pat. No. 10,014,698

STORAGE BATTERY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A storage battery system connected to a power system and operative based on a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:a storage battery including a plurality of cells connected in series;
battery management circuitry configured to continuously monitor a state of the storage battery;
power conditioning circuitry configured to
convert AC power of the power system into DC power;
charge the storage battery with the DC power;
convert DC power of the storage battery into AC power; and
discharge the AC power to the power system; and
a controller configured to
receive the charge/discharge request and storage battery information supplied from the battery management circuitry; and
control the power conditioning circuitry based on the charge/discharge request and the storage battery information, wherein
the controller is configured to
receive the storage battery information and execute control to output a charge/discharge command to the power conditioning circuitry so that an average voltage of the plurality of cells is maintained within a range of a holding voltage that suppresses deterioration of the storage battery; and
stop the executing the control when a voltage of any one of the plurality of cells included in the storage battery information is out of an allowable voltage range including the holding voltage range.

US Pat. No. 9,991,883

STATIC SWITCH

TOSHIBA MITSUBISHI-ELECTR...

1. A static switch for switching between electrical connection and disconnection between an alternating-current power supply and a load, the static switch comprising:a thyristor switch connected between the alternating-current power supply and the load and including a pair of arms connected in anti-parallel, each of the arms including a plurality of thyristors connected in series; and
a controller configured to perform on-off control of the thyristor switch,
the thyristor switch being configured to be turned on in response to a gate signal supplied from the controller, and turned off in response to a current coming to zero in a state in which the gate signal is interrupted,
the controller including:
a phase detecting unit configured to detect a phase of a power supply voltage supplied from the alternating-current power supply, and
a gate signal generating unit configured to interrupt the gate signal when an open command is provided to the static switch and when the phase of the power supply voltage detected by the phase detecting unit matches a target phase,
the target phase being set outside of a phase range where interruption of the gate signal is prohibited, the phase range being set so as to include a zero crossing point at which a load current is switched in polarity.

US Pat. No. 10,153,647

STORAGE BATTERY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

2. A storage battery system connected to a power system and operative based on a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:a storage battery;
battery management circuitry configured to monitor a state of the storage battery with a first sensor;
power conditioning circuitry configured to
convert AC power of the power system into DC power;
charge the storage battery with the DC power;
convert DC power of the storage battery into AC power;
discharge the AC power to the power system; and
perform charge to the storage battery and discharge from the storage battery with reference to an output value of a second sensor; and
control circuitry configured to
receive the charge/discharge request and storage battery information supplied from the battery management circuitry;
control the power conditioning circuitry based on the charge/discharge request and the storage battery information;
acquire the output value of the second sensor from the power conditioning circuitry; and
compare the output value of the second sensor and an output value of the first sensor included in the storage battery information, and output the comparison result, wherein
the control circuitry further includes an interlock processing circuitry configured to perform interlock processing based on the comparison result.

US Pat. No. 10,069,452

MOTOR DRIVING SYSTEM

Toshiba Mitsubishi-Electr...

1. A motor driving system, comprising:drive variable speed driving means connected to a commercial AC power source for driving a motor at a variable speed;
a first switch provided between the drive variable speed driving means and the motor;
a second switch provided between the commercial AC power source and the motor;
commercial driving means for driving the motor by commercial power outputted from the commercial AC power source;
a controller configured to switch between the drive variable speed driving means and the commercial driving means to drive the motor; and
a system controller configured to set a drive driving command to drive the motor by the drive variable speed driving means, and set speed references for setting a rotation speed of the motor, the speed references including a first speed reference and a second speed reference larger than the first speed reference,
wherein the controller is further configured to when the drive driving command is set by the system controller, and the first speed reference is set, drive the motor at a variable speed based on the first speed reference, when the second speed reference is set, drive the motor at a variable speed based on the second speed reference, and when the rotation speed of the motor exceeds the second speed reference, or the rotation speed of the motor becomes within a speed reference allowable value that has been set for the second speed reference, control the first switch and the second switch to drive the motor by the commercial AC power source.

US Pat. No. 10,141,753

STORAGE BATTERY SYSTEM

TOSHIBA MITSUBISHI-ELECTR...

1. A storage battery system for which N (N?2) power conditioning systems are connected to a power system and a storage battery module group formed by connecting one or more storage battery modules in parallel is connected to each of the N power conditioning systems, and which is operated on a basis of a charge/discharge request from an energy management system that manages electric power supply/demand of the power system, the storage battery system comprising:battery management units that monitor a state of the storage battery module group; and
a controller that receives the charge/discharge request and storage battery information supplied from the battery management units, and controls the N power conditioning systems on the basis of the charge/discharge request and the storage battery information, wherein the power conditioning system has a function of converting AC power of the power system to DC power and charging the DC power to the storage battery module group, and a function of converting the DC power of the storage battery module group to the AC power and discharging the AC power to the power system,
wherein a maximum power storage capacity of the storage battery modules configuring at least one storage battery module group is different from a maximum power storage capacity of the storage battery modules configuring the other storage battery module groups, and
wherein the controller includes a charge/discharge command unit that determines a charge/discharge amount of each of the N power conditioning systems so as to satisfy a relational expression (1) below:

 where,
Pi is the charge/discharge amount of an i-th power conditioning system (1?i?N),
Preq is the charge/discharge request,
Bnumi is the number of the storage battery modules connected to the i-th power conditioning system, and
Cratioi is a capacity ratio of the maximum power storage capacity of the storage battery modules connected to the i-th power conditioning system to a reference power storage capacity.

US Pat. No. 10,122,253

POWER CONVERSION APPARATUS AND INITIAL CHARGING METHOD OF THE SAME

Toshiba Mitsubishi-Electr...

1. A power conversion apparatus, characterized by comprising:an input transformer which converts a high voltage power of a high voltage power source into an AC power which an inverter device requires;
a circuit breaker which is arranged between the high voltage power source and the input transformer, and closes or breaks an electric circuit for supplying the high voltage power to be supplied from the high voltage power source to the input transformer;
a converter section which converts the AC power converted by the input transformer into a DC power;
a smoothing capacitor which smooths the DC power converted by the converter section; and
a synchronous switching control device which detects a phase angle of a voltage of the high voltage power source, and controls to close or break the circuit breaker, at a timing when the detected phase angle reaches a prescribed phase angle, wherein
the synchronous switching control device controls to close the circuit breaker when the prescribed phase angle is a phase angle in which a first half-wave peak voltage value of the smoothing capacitor coincides with a peak voltage value of an input voltage of the input transformer.

US Pat. No. 10,186,952

POWER CONVERSION DEVICE

Mitsubishi Electric Corpo...

1. A power conversion device, comprising:a plurality of converter cells connected in series with one another, each one of the plurality of converter cells including
two power terminals,
a bypass element electrically coupled with the two power terminals,
an electrical energy storage element, and
semiconductor devices arranged as a plurality of converter arms that is electrically coupled with the electrical energy storage element and configured to perform electrical power conversion between the two power terminals and the electrical energy storage element during a normal operation of the converter cell; and
circuitry configured to
detect whether or not each of the converter cells is normal, and
when abnormality of a particular converter cell is detected, set the bypass element of the particular converter cell to a close-circuit state and control at least one of the plurality of converter arms of the particular converter cell to form an electric current path in parallel with the bypass element for at least a time period until the bypass element of the particular converter cell is in the close-circuit state.

US Pat. No. 10,110,110

POWER CONVERSION DEVICE

MITSUBISHI ELECTRIC CORPO...

1. A power conversion device comprising:a plurality of converter cells connected in series to correspond to each of phases of a plural-phase AC system, and a control device capable of individually controlling operations of the converter cells,
each converter cell comprising:
a series connection circuit in which switching elements are connected in series to diodes connected in antiparallel;
a DC capacitor connected in parallel to the series connection circuit and configured to smooth a DC voltage; and
a self-feeding circuit configured to cause the switching elements to operate, the control device comprising:
a protection controller configured to temporarily stop switching operation of the switching elements when an output current from the converter cell is equal to or greater than a predetermined value or when a voltage of the respective DC capacitor is out of a predetermined range that allows the respective self-feeding circuit to operate;
a voltage determiner configured to determine whether or not the voltage of each DC capacitor of the DC capacitors is within the range that allows the self-feeding circuits to operate, every time a predetermined period has passed from the temporary stoppage of the switching operation by the protection controller;
a charge controller configured to select a converter cell that is determined to be operated by the voltage determiner and cause the switching elements thereof to operate; and
a gate controller configured to resume the switching operation of the switching elements when the voltage determiner has determined that voltages of all the DC capacitors are within the predetermined range.

US Pat. No. 10,232,419

MOTOR SPEED CONTROL DEVICE FOR ROLLING MILL

TOSHIBA MITSUBISHI-ELECTR...

1. A motor speed control device for a rolling mill including a rolling roll configured to roll a metal material, a roll rotation shaft directly connected to the rolling roll, a motor rotation shaft configured to transmit power to the roll rotation shaft, and a motor configured to drive the motor rotation shaft, the motor speed control device for a rolling mill comprising:a non-contact speed sensor configured to be arranged at a position close to the rolling roll with spacing to a circumferential surface of the roll rotation shaft and to detect a roll rotation shaft angular speed, which is an angular speed of the roll rotation shaft;
a motor speed sensor configured to detect a motor rotation shaft angular speed, which is an angular speed of the motor rotation shaft; and
a speed controller configured to control a speed of the motor to a target angular speed of the rolling roll based on a comparison between a synthetic value and the target angular speed of the rolling roll so that the synthetic value coincides with the target angular speed,
wherein the synthetic value is a sum of: the motor rotation shaft angular speed multiplied by a ratio, ?, where 0

US Pat. No. 10,234,489

METHOD FOR MANAGING ASSEMBLING PROCESS OF ELECTRICAL PRODUCT

TOSHIBA MITSUBISHI-ELECTR...

1. A method for managing an assembling process of an electrical product, the electrical product including a power supply circuit and a substrate on which a semiconductor component is mounted, wherein the power supply circuit supplies a potential across the semiconductor component, the method comprising:electrically connecting two lines of a static electricity measuring equipment to two points on electrical lines or signal lines electrically connected across the semiconductor component;
continuously measuring a potential difference between the two points on the electrical lines or the signal lines electrically connected across the semiconductor component inside the electrical product throughout the assembling process of the electrical product; and
when a change in the potential difference measured between the two points on the electrical lines or the signal lines exceeds a predetermined threshold for distinguishing between static electricity discharge noise and a normal potential range occurs during the assembling process of the electrical product, measurement data of the potential difference between the two points is recorded in a computer in communication with the static electricity measuring equipment and a marker is provided in the measurement data of the potential difference between the two points for identifying that the electrical product is affected by static electricity discharge to the electrical product.

US Pat. No. 10,236,818

DRIVE AND CONTROL APPARATUS FOR MULTIPLE-WINDING MOTOR

TOSHIBA MITSUBISHI-ELECTR...

1. A drive control apparatus for multiple-winding motor, comprising:a plurality of power converters each of which has a switching device for driving a multiple-winding AC motor and converts a DC power supply to a variable-voltage and variable-frequency AC power supply; and
a control unit for controlling the power converters, wherein
the control unit includes:
an output voltage control unit for calculating and outputting output voltage and an output voltage phase for driving the multiple-winding AC motor at a desired rotation speed; and
a PWM control unit for performing PWM control for the switching device,
the output voltage control unit includes:
an output voltage determination unit for determining the output voltage on the basis of a frequency command;
an output voltage phase calculating unit for calculating the output voltage phase through integration on the basis of the frequency command; and
a modulation rate phase command generation unit which calculates d-axis current and q-axis current of each power converter on the basis of the output voltage phase, calculates a modulation rate correction amount and a phase correction amount for each power converter in order to equalize currents flowing through windings of the multiple-winding AC motor, on the basis of the d-axis current and the q-axis current, and generates a modulation rate command and a phase command for controlling each power converter, on the basis of the modulation rate correction amount and the phase correction amount,
the PWM control unit includes:
a modulation rate calculation unit for calculating a modulation rate on the basis of the output voltage calculated by the output voltage control unit and DC voltage of the DC power supply;
a pulse number determination unit for determining a number of pulses per half cycle of the PWM control for the switching device, on the basis of the frequency command;
a pattern table for storing, for each number of pulses and for each magnitude of the modulation rate, a switching pattern for reducing a low-order harmonic in the output voltage; and
a gate signal generator for generating a gate signal for driving the switching device, using the switching pattern from the pattern table, on the basis of the modulation rate from the modulation rate calculation unit, the number of pulses from the pulse number determination unit, and the output voltage phase calculated by the output voltage control unit, and
the modulation rate phase command generation unit performs control for equalizing currents of the power converters, and a phase or frequency at which the control is performed is changed in accordance with any of the number of pulses, the modulation rate, the frequency command, and the switching pattern.

US Pat. No. 10,175,289

WATER-TREE RESISTANCE EVALUATION METHOD, INSULATION DESIGN METHOD, AND ROTARY ELECTRIC MACHINE

TOSHIBA MITSUBISHI-ELECTR...

1. A water-tree resistance evaluation method for a water tree phenomenon of insulation material, comprising:selecting a candidate insulation material as a candidate;
carrying out, after the selecting, a water tree test on a test piece that is a flat plate made of the candidate insulation material selected by the selecting and has electrode holes formed on a first surface; and
evaluating, after the water tree test, characteristics of the candidate insulation material, including progress and speed of a water tree, based on a result of test at the water tree test, wherein
the water tree test includes:
setting a test system so that the first surface of the test piece is immersed in a ground-side aqueous solution of a voltage application side while a flat second surface of the test piece, which is an opposite side from the first surface, is immersed in an application-side aqueous solution,
grounding, after the setting, a ground-side electrode that is immersed in the ground-side aqueous solution, while applying an AC voltage to an application-side electrode that is immersed in the application-side aqueous solution,
measuring, after the start of the grounding and the applying, progress of water tree inside the test piece at predetermined intervals, and
determining, after the measuring, whether a test period has exceeded a predetermined period, and for ending the water tree test if the test period has exceeded the predetermined period while repeating the grounding and the applying and the measuring if the test period has not exceeded the predetermined period;
obtaining attenuation characteristics of a progress speed of water tree by dividing a slope of the progress speed at each point in test time by the slope at an initial time in the progress of the water tree obtained at the measuring;
determining, after the attenuation characteristic evaluating, whether or not the attenuation characteristics satisfy attenuation determination conditions, and for rejecting the candidate insulation material if the attenuation determination conditions are not satisfied; and
multiplying an amount of the progress by a predetermined coefficient if the attenuation characteristics satisfy the attenuation determination conditions at the determining, and of determining whether or not a value thereof is smaller than a progress amount determination value, and for rejecting the candidate insulation material if the value is not smaller than the progress amount determination value.

US Pat. No. 10,121,931

FILM FORMATION DEVICE

TOSHIBA MITSUBISHI-ELECTR...

1. A film formation device comprising:a mist generator that generates a mist of a raw material of a film to be formed; and
a mist jet nozzle that jets the mist to a substrate on which a film is to be formed,
the mist jet nozzle comprising:
a main body having a hollow portion;
a mist supply port formed in the main body and configured to supply the mist to the inside of the hollow portion;
a first spout formed in the main body and configured to jet the mist in the hollow portion to the outside;
a carrier gas supply port formed in the main body and configured to supply a carrier gas to the inside of the hollow portion, the carrier gas transporting the mist to the first spout; and
a shower plate arranged within the hollow portion and having a plurality of holes formed therein,
wherein
the hollow portion comprises a first space and a second space divided by the shower plate,
the first space is connected to the carrier gas supply port,
the second space is connected to the first spout,
the mist supply port is formed in the main body so as to be connected to the second space, and
a total of opening areas of the plurality of holes formed in the shower plate is smaller than a total of an opening area of the carrier gas supply port.

US Pat. No. 10,118,191

FILM FORMING APPARATUS

Toshiba Mitsubishi-Electr...

1. A film forming apparatus which sprays a first material which is atomized to an atmosphere so as to form a film on a substrate, comprising:a mounting part on which said substrate is mounted; and
a mist spray head which sprays said first material to an upper surface of a substrate mounted on said mounting part, wherein
said mist spray head includes:
a first material spray nozzle which sprays said first material and
a first material ejection part which is provided in a side of said mist spray head facing said substrate, so that said first material which is atomized is sprayed to said substrate, and
said first material spray nozzle includes:
a first cavity;
a first material supply part which supplies said first material which is atomized into said first cavity; and
a first material discharge part which is drilled in a side surface of said first cavity, being away from a bottom surface of said first cavity, and is connected to said first material ejection part;
said first material spray nozzle further includes a first straightening plate provided in said first cavity to straighten a flow of said first material, and which extends at an oblique angle from one side edge to an opposite side edge of said first material spray nozzle and to divide a space in the first material spray nozzle into the first cavity and a lower second cavity.