US Pat. No. 9,554,492

POWER CONVERTER

LSIS CO., LTD., Anyang-s...

1. A power converter comprising:
a heat sink;
a holding unit located on the heat sink and comprising a first part shaped to define a first groove and a second part shaped
to define a second groove;

a plurality of semiconductor devices disposed on the heat sink and located between the first part of the holding unit and
the second part of the holding unit; and

a fixing assembly pressing each of the semiconductor devices toward the heat sink;
wherein the fixing assembly comprises:
a lower push unit located between the first part of the holding unit and the second part of the holding unit, wherein the
lower push unit comprises a top side and a bottom side, wherein the bottom side of the lower push unit contacts each of the
semiconductor devices;

an upper push unit comprising a central bent part that extends between a first insertion part and a second insertion part,
wherein the central bent part partially protrudes downward and is elastically deformed such that a bottom side of the central
bent part contacts the top side of the lower push unit, and wherein the first insertion part is received within the first
groove and the second insertion part is received within the second groove; and

a fixing bar inserted into the first groove and the second groove to couple the upper push unit to the holding unit.

US Pat. No. 9,445,533

ELECTRONIC COMPONENT CASE FOR VEHICLE

LSIS CO., LTD., Anyang-s...

1. An electronic component case for a vehicle, the electronic component case comprising:
a case body having a first space in which electronic components are disposed and a second space that is defined adjacent to
the first space to receive heat generated from the electronic components and into which coolant for cooling the electronic
components is introduced and discharged; and

a cover disposed on the case body to seal the second space,
wherein the cover comprises a first cover and a second cover sealing the second space, the second cover having one surface
on which a first cooling part for increasing a surface area of the second cover is disposed,

wherein the first cover and the second cover are compatible with each other,
wherein the first and second spaces are partitioned by an inner plate on which the electronic components are disposed,
wherein a surface of the second cover that faces the second space is in contact with the inner plate when the second cover
is disposed on the case body.

US Pat. No. 9,622,390

APPARATUS FOR COOLING INVERTER

LSIS CO., LTD., Anyang-s...

1. An apparatus for cooling an inverter, the apparatus comprising:
a housing having an air inlet at one side and an air outlet at the other side; and
a wall dividing an inner space of the housing in order to form a first flow part and a second flow part to allow air introduced
to the air inlet to be discharged through the air outlet,

wherein:
the wall includes a first wall starting from the air inlet, a second wall starting from the air outlet, and a third wall located
between the first and second walls, an opening formed at least between the first wall and the third wall or between the second
wall and the third wall;

the first wall and the second wall are formed in parallel, but not formed on a straight line, such that the third wall is
arranged slantly with a predetermined angle between one end of the first wall and one end of the second wall;

the air outlet is formed only on the first flow part such that a housing surface is formed on the second flow part at the
other side of the housing, a third flow part formed by the second wall and the housing surface;

air introduced into the second flow part through the air inlet merges with the first flow part through the opening;
at least one electric element is disposed on a corresponding one of the first, second, or third flow part; and
the opening is arranged so as to functionally induce and allow the air in the second flow part to be discharged to the air
outlet formed only at the first flow part.

US Pat. No. 9,052,726

METHOD OF CONTROLLING MULTI LEVEL CONVERTER

LSIS Co., Ltd., Anyang-S...

1. A method of controlling a multilevel converter, comprising:
extracting a sub-module having the maximum voltage and a sub-module having the minimum voltage respectively from among a plurality
of sub-modules;

determining an amount of state variation of each of the plurality of sub-modules;
when the amount of state variation is not determined to be 0, detecting a direction of a current flowing through the plurality
of sub-modules; and

determining a subsequent state of at least one sub-module according to at least one of the amount of state variation and current
direction.

US Pat. No. 9,118,509

COMMUNICATION METHOD OF GATEWAY DEVICE SUPPORTING MUTUAL COMMUNICATION OF CAN AND MODBUS AND GATEWAY DEVICE USING THE SAME

LSIS Co., Ltd., Anyang-S...

1. A gateway device for relaying communication between a Controller Area Network (CAN) communication device and a Modbus communication
device, the gateway device comprising:
a CAN input unit for receiving a CAN input data frame from the CAN communication device; and
a Modbus input unit for receiving a Modbus input data frame from the Modbus communication device
a conversion unit for converting the received CAN input data frame into a Modbus output data frame and converting the received
Modbus input data frame into a CAN output data frame; and

a Modbus output unit for outputting the converted Modbus output data frame
a CAN output unit for outputting the converted CAN output data frame,
wherein the CAN input data frame or the CAN output data frame comprises a CAN identifier, a data length code, and a plurality
of CAN data units,

the Modbus input data frame or the Modbus output data frame comprises an address, a function code, a plurality of Modbus data
units and a Cyclic Redundancy Check (CRC) code,

wherein the conversion unit generates the address of the Modbus output data frame on a basis of the CAN identifier in the
CAN input data frame when the received CAN input data frame is converted into the Modbus output data frame,

generates the plurality of Modbus data units of the Modbus output data frame on a basis of the plurality of CAN data units
in the CAN input data frame,

generates the function code of the Modbus output data frame to correspond to a transmission purpose of the CAN input data
frame,

generates the CRC code of the Modbus output data frame on the basis of the plurality of CAN data units in the CAN input data
frame,

wherein the conversion unit analyzes a number of bytes of the Modbus input data when the Modbus input data frame is converted
into the CAN output data frame,

sequentially divides the Modbus input data frame by 8 bytes when the analyzed number of data bytes in the Modbus input data
frame is greater than 8 bytes, and

sequentially generates and outputs a plurality of divided output data frames.

US Pat. No. 9,472,335

TRANSFORMER MODULE FOR ELECTRIC VEHICLE

LSIS CO., LTD., Anyang-s...

1. A transformer module for an electric vehicle, the transformer module comprising:
an upper bobbin around which a primary-side coil is wound;
a printed circuit board; and
an upper bus bar disposed between the bobbin and the printed circuit board; and
an upper pattern part formed of an electrically conductive material provided on the printed circuit board;
wherein the upper pattern part has a shape corresponding to a shape of the upper bus bar and electrically connects to the
upper bus bar in parallel,

wherein the upper pattern part is formed of a material having superior electrical conductivity than that of the upper bus
bar,

wherein the upper pattern part is printed on the printed circuit board.

US Pat. No. 9,425,002

CIRCUIT BREAKER

LSIS CO., LTD., Anyang-S...

1. A circuit breaker comprising:
a housing;
a stator accommodated in the housing and connected to a terminal unit;
a mover that pivots about an axis to be selectively brought into contact with the stator;
an opening and closing unit manipulating the mover such that the mover is selectively brought into contact with the stator,
wherein the opening and closing unit comprises: a first shaft connected to a power transmission unit, a link connected to
the first shaft, a second shaft connected to the link, and a latch having a first end and a second end, wherein the first
end of the latch is connected to the link by the second shaft;

an insulating cover provided between the mover and the opening and closing unit, and shielding the mover and the stator from
the exterior of the housing; and

a holder connected to the second end of the latch, wherein the holder is movable about an axis in opposing first and second
directions according to rotation of the first shaft, wherein the holder provides a contact force to the mover to cause the
mover to pivot about the axis, wherein the axis of the holder is different than the axis of the mover;

wherein the housing or the insulating cover is made by molding an electrical insulating material,
wherein, a part of the insulating cover is inserted into the holder such that a side of the holder is formed to overlap with
a portion of a side of the insulating cover.

US Pat. No. 9,287,073

CIRCUIT BREAKER

LSIS Co., Ltd., Anyang-S...

1. A circuit breaker comprising:
an inner box including an arc exhaust port for exhausting an arc generated in the inner box;
an outer box receiving the inner box and including an arc passage for exhausting the arc from the exhaust port to an exterior;
and

an arc guide part for guiding the arc from the arc exhaust port into the arc passage;
wherein the arc guide part comprises:
an upper guide;
a lower guide spaced apart from the upper guide;
a connecting part connecting the upper and lower guides to each other in a longitudinal direction;
a first guide protrusion and a second guide protrusion formed on the lower guide;
a guide groove formed on the upper guide; and
at least one partition part formed on the lower guide, wherein a first partition part of the at least one partition part is
disposed between the first and second guide protrusions and protrudes from the lower guide at a predetermined height such
that the arc exhausted from the arc exhaust port is partitioned.

US Pat. No. 9,117,605

DC POWER RELAY

LSIS Co., Ltd., Anyang-S...

1. A DC power relay comprising:
a pair of fixed contacts located parallel to each other;
a movable contact movable with respect to the pair of fixed contacts such that the movable contact may be in contact with
or separated from the pair of fixed contacts;

a pair of permanent magnets facing each other for externally guiding an arc generated by the movable contact; and
a first damping magnet and a second damping magnet for reducing a force generated in a direction in which the movable contact
is separated from the pair of fixed contacts, the first and second damping magnets having opposite magnetic fluxes such that
they provide a repulsive force,

wherein the first and second damping magnets, the pair of fixed contacts and the movable contact are located between the pair
of permanent magnets,

wherein a magnetic flux generated by the first damping magnet is opposite to a magnetic flux induced by current flowing into
the movable contact when the movable contact is in contact with the pair of fixed contacts,

wherein a magnetic flux generated by the second damping magnet is opposite to a flux induced by current flowing into the movable
contact when the movable contact is in contact with the pair of fixed contacts.

US Pat. No. 9,054,523

CURRENT DETECTING MECHANISM CAPABLE OF DETECTING GROUND FAULT FOR DIRECT CURRENT CIRCUIT BREAKER

LSIS Co., Ltd., Anyang-S...

7. A current detecting mechanism for a direct current circuit breaker, the circuit breaker having at least a pair of electric
power source side terminals and at least a pair of electric load side terminals, the mechanism comprising:
a direct current shunt installed to be electrically connected to one of the pair of electric load side terminals and having
a plurality of resistor members with high resistivity, the direct current shunt outputting an electric potential difference
across the resistor members, which is proportional to a current flowing through the connected load side terminal, as a voltage
signal; and

a hall sensor assembly having a pair of magnetic cores installed near the other of the pair of electric load side terminals
with being spaced therefrom for insulation, the pair of magnetic cores being installed to face each other with an air gap
therebetween, and a hall sensor installed in the air gap between the magnetic cores, the hall sensor outputting an output
voltage according to a magnetic flux induced in proportion to a current flowing through the other of the pair of load side
terminals.

US Pat. No. 9,136,076

MECHANICALLY OPERATED CELL SWITCH OF VACUUM CIRCUIT BREAKER

LSIS Co., Ltd., Anyang-S...

1. A mechanically operated cell (MOC) switch outputting an ON/OFF state of a vacuum circuit breaker when the vacuum circuit
breaker operates, the MOC switch comprising:
a main bracket;
a rotational shaft installed in the main bracket;
a connection lever rotatably coupled to the rotational shaft and having a first end connected to an auxiliary switch;
a roller coupled to a second end of the connection lever; and
a horizontal moving unit installed in a portion of the main bracket and including a moving bar that moves horizontally such
that the moving bar rotates the roller and causes the second end of the connection lever to ascend and descend perpendicularly.

US Pat. No. 9,473,050

MOTOR STARTER SYSTEM AND METHOD FOR OPERATING SAME

LSIS CO., LTD., Anyang-s...

1. A motor control apparatus comprising:
one or more sensor units;
an electromagnetic contactor connected to a motor, and configured to perform an on or off operation;
a control unit configured to compare a reference value with a sensing value output from each of the one or more sensor units,
generate a control signal based on a result of the comparison, and control an on or off operation of the electromagnetic contactor
based on the control signal to stop or operate the motor; and

a communication unit configured to communicate with a remote monitoring apparatus,
wherein in a case where a control command for switching the electromagnetic contactor to an off state is received from the
remote monitoring apparatus through the communication unit,

when the electromagnetic contactor is in an on state currently, the control unit executes the control command, and
when the electromagnetic contactor is in an off state currently, the control unit generates an NAK message to supply the NAK
message to the remote monitoring apparatus.

US Pat. No. 9,455,618

METHOD FOR CONTROLLING MULTILEVEL CONVERTER

LSIS CO., LTD., Anyang-s...

1. A method for controlling a multilevel converter, the method comprising:
detecting states (ON/OFF) and directions of current of sub-modules; and
controlling output voltage of the multilevel converter by turning-on or turning-off the sub-modules,
wherein the controlling the output voltage of the multilevel converter includes:
grouping the sub-modules into a first group including sub-modules that are in an ON state and a second group including sub-modules
that are in an OFF state, sorting the sub-modules according to their capacitor voltages; and

turning-on or turning-off the sub-modules by determining a difference between a number of sub-modules to be turned-on and
a number of sub-modules that was previously in the ON state.

US Pat. No. 9,220,170

MOTOR STARTER MODULE

LSIS Co., Ltd., Anyang-S...

1. A motor starter module mounted on an upper surface of a magnetic contactor, the motor starter module comprising:
a Printed Circuit Board (PCB) substrate configured to communicate with and control the magnetic contactor;
a mechanism part operating according to an ON/OFF state of the magnetic contactor and physically connecting the PCB substrate
to the magnetic contactor; and

an upper case covering the PCB substrate and an outer case of the mechanism part,
wherein the mechanism part includes:
a movable contact point unit fixed in a movable contact point case and moving according to the ON/OFF state of the magnetic
contactor, the movable contact point unit including a movable contact point arm, a movable contact point spring and a back
spring; and

a fixed contact point unit fixed in a fixed contact point case, physically connecting the PCB substrate to the magnetic contactor
and transmitting an electric signal to the PCB substrate according to whether the fixed contact point unit is in contact with
the movable contact point unit, the fixed contact point unit including a fixed contact point arm,

wherein the mechanism part causes the movable contact point arm to contact the fixed contact point arm due to a load of the
movable contact point spring and the back spring when the magnetic contactor is in the OFF state and causes the movable contact
point arm to not contact the fixed contact point arm by distancing the movable contact point arm from the fixed contact point
arm due to downward movement of the movable contact point unit when the magnetic contactor is in the ON state.

US Pat. No. 9,485,880

ELECTRIC DEVICE FOR ELECTRIC VEHICLE

LSIS CO., LTD., Anyang-s...

1. An electric device for an electric vehicle, the electric device comprising:
a lower case;
an upper case coupled to an upper portion of the lower case;
a first printed circuit board (PCB) fixed to the lower case and comprising a first connector; and
a second PCB fixed to the upper case and comprising a second connector, wherein the first connector and the second connector
are vertically disposed to correspond to each other,

wherein the first connector is coupled to the second connector by coupling the lower case to the upper case to connect the
first PCB to the second PCB,

wherein a first PCB mounting part protruding upward is disposed on the lower case,
wherein a first through-hole vertically passes through the first PCB and corresponds to the first PCB mounting part,
wherein a second PCB mounting part protruding downward is disposed on the upper case,
wherein a second through-hole vertically passes through the second PCB and corresponds to the second PCB mounting part,
wherein the first PCB mounting part has a first bolt coupling groove that has an opened upper end and is recessed downward,
wherein a first screw thread is formed on an inner circumferential surface of the first bolt coupling groove,
wherein a first bolt passes through the first through-hole and is coupled to the first bolt coupling groove,
wherein the second PCB mounting part has a second bolt coupling groove that has an opened lower end and is recessed upward,
wherein a second screw thread is formed on an inner circumferential surface of the second bolt coupling groove, and
wherein a second bolt passes through the second through-hole and is coupled to the second bolt coupling groove.

US Pat. No. 9,203,388

METHOD FOR GENERATING CLOCK FOR SYSTEM OPERATING AT RISING EDGE

LSIS Co., Ltd., Anyang-S...

1. A method of generating a clock for a system operating at a rising edge, converting an input clock to generate an output
clock and providing a certain system with the output clock, the method comprising:
setting up a desired output clock value and a variable value and determining whether the input clock is the rising edge;
adding the output clock value to the variable value to provide a calculated value when the input clock is the rising edge;
comparing the calculated value with the input clock value; and
outputting, when the calculated value is equal to or larger than the input clock value as a result of comparison, the output
clock as logic state ‘1’ and setting, a value obtained by subtracting the input clock value from the calculated value, as
the variable value.

US Pat. No. 9,116,014

APPARATUS AND METHOD FOR ENERGY DISPLAY

LSIS Co., Ltd., Anyang-S...

1. An energy display apparatus, the apparatus comprising:
a smart meter configured to detect energy-related data of an energy user;
an input part positioned at the smart meter and configured to receive a comparison condition from the energy user for comparing
energy-related data of other energy users;

a statistical information processing part configured to process the energy related data of other energy users in response
to the inputted comparison condition; and

an IHD (In Home Display) configured to display a result of the statistical information processing part;
wherein:
the comparison condition is input via the smart meter; and
the statistical information processing part is positioned at a smart metering system server configured to control smart meters.

US Pat. No. 9,337,721

CORRECTION CIRCUIT LIMITING INRUSH CURRENT

LSIS CO., LTD., Anyang-s...

6. A power factor correction circuit comprising:
a capacitor for removing an AC noise;
a plurality of bridge diodes;
a power factor correction unit having an input terminal connected to an output terminal of the plurality of bridge diodes;
a smoothing capacitor having one end connected to an output terminal of the power factor correction unit;
a switch having one end to which AC voltage is applied;
a diode having one end connected to the other end of the switch;
a resistor having one end connected to the other end of the diode; and
a current control signal generation unit for generating a current control signal for controlling the rectifying unit and an
inrush current limiting unit;

wherein the current control signal generation unit controlling a current flow to the inrush current limiting unit according
to whether the power factor correction circuit is in a steady state,

wherein the current control signal generation unit prevents a current flow to the inrush current limiting unit by determining
that the power factor correction circuit is in the steady state when a value of the smoothed voltage is equal to or greater
than a reference voltage value,

wherein the current control signal generation unit allows a current flow to the inrush current limiting unit by determining
the power factor correction circuit is in a transient state when the value of the smoothed voltage is less than the reference
voltage value.

US Pat. No. 9,201,110

MULTI-CHANNEL LEAKAGE CURRENT MONITORING SYSTEM

LSIS Co., Ltd., Anyang-S...

1. A multi-channel leakage current monitoring system configured to monitor leakage currents transmitted to loads from a plurality
of molded case circuit breakers (MCCBs), the system comprising:
a plurality of current transformers configured to measure power information data about loads connected to secondary side power
lines of the MCCBs, and to provide the measured data;

a multi-channel measuring unit (MCMU) configured to detect a leakage current by analyzing the power information data received
from the current transformers, and having a controller configured to analyze the measured data received from the plurality
of current transformers, to record a leakage current event in an occurrence of a leakage current, and to transmit data of
the leakage current to the smart meter; and

a smart meter configured to measure, store, and collect data of power required by an upper system of the multi-channel monitoring
system by receiving the transmitted data from the MCMU.

US Pat. No. 9,184,616

ADD-ON COMMUNICATION APPARATUS ATTACHED TO IN-CABLE CHARGING CONTROL DEVICE AND OPERATING METHOD THEREOF

LSIS Co., Ltd., Anyang-S...

1. A communication apparatus attached to an in-cable charging control device, the in-cable changing control device integrated
with a cable assembly for charging an electric vehicle, the apparatus comprising:
a first communication module to perform wireless communication with a terminal;
a second communication module to perform wireless communication with the in-cable charging control device; and
a control module
to receive a command from the terminal via the first communication module, to generate a first control command based on the
received command, and to transmit the generated first control command to the in-cable charging control device via the second
communication module.

US Pat. No. 9,184,693

SUPPORTING DEVICE FOR SOLAR PANEL

LSIS Co., Ltd., Anyang-S...

1. A supporting device for a solar panel, the supporting device comprising:
a plurality of buoyant members, each comprising:
an upper body having an upper wing part formed in a lateral surface and comprising a plurality of upward protrusions and a
first prop and second prop each formed on one of the plurality of protrusions to support the solar panel; and

a lower body on which lower wing part is formed, the lower wing part protruding from a side of the lower body and lower surface
of the lower body protruding downward,

wherein the upper wing part and lower wing part are coupled to form a main wing part; and
a connector formed to have a box shape and connecting the plurality of buoyant members in a vertical or horizontal direction,
a plurality of connection wing parts formed in lateral surfaces of the connector, and

wherein each of the plurality of buoyant members is coupled to the connector by coupling the plurality of connection wing
parts to the corresponding main wing part.

US Pat. No. 9,088,286

METHOD AND APPARATUS FOR DETECTING CUT-OFF FREQUENCY OF PULSE SIGNAL

LSIS Co., Ltd., Anyang-S...

1. An apparatus for detecting a cut-off frequency of a pulse signal, the apparatus comprising:
an input processor configured to generate a second pulse signal at a time when a rising edge and a falling edge of a first
pulse signal appear, in a case the first pulse signal, which is a pulse signal of a monitoring object, is inputted;

a counter configured to count a clock signal relative to the second pulse signal generated by the input processor;
a reset processor configured to reset the counter at every predetermined (set) period; and
a detector configured to generate and output a cut-off frequency of a detection signal, in a case an output value of the counter
exceeds a predetermined (set) threshold during the predetermined period.

US Pat. No. 9,054,878

SYSTEM AND METHOD FOR SECURITY AUTHENTICATION OF POWER SYSTEM

LSIS Co., Ltd., Anyang-S...

1. A method for security authentication by a power system, the method comprising:
transmitting a signal to an authentication server to request authentication on at least one remote control server or an external
terminal with which the power system is to perform communication;

transmitting a public key to the authentication server;
receiving an authentication certificate transmitted by the authentication server, the authentication certificate generated
by the authentication server using the transmitted public key;

performing authentication on the at least one remote control server or the external terminal using the received authentication
certificate; and

performing communication with the authenticated at least one remote control server or the external terminal through an open-type
communication network when authentication is completed by the authentication server;

wherein performing authentication comprises:
receiving a remote control server public key from the at least one remote control server;
encrypting a symmetric key using the received remote control server public key; and
transmitting the encrypted symmetric key to the at least one remote control server.

US Pat. No. 9,418,805

TERMINAL STRUCTURE OF MAIN CIRCUIT PART OF VACUUM CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A terminal structure of a main circuit part of a vacuum circuit breaker, the terminal structure of the main circuit part
comprising:
a cylindrical terminal comprising a circular heat fin unit at an inner surface of the cylindrical terminal and an air-flow
path from a lower side of the cylindrical terminal to an upper side of the cylindrical terminal in a first direction perpendicular
to a length-wise center axis of the cylindrical terminal; and

a bar terminal and heat diffusion fins provided at an upper surface, a lower surface, and side surfaces of the bar terminal;
wherein the circular heat fin unit is located at the air-flow path and comprises a plurality of heat fins aligned parallel
to the first direction.

US Pat. No. 9,362,076

TRIP DEVICE OF MOLDED CASE CIRCUIT BREAKER USING A STAIR TYPE HANGER

LSIS CO., LTD., Anyang-s...

1. A trip device of a molded case circuit breaker, the trip device comprising:
a shooter configured to include a body and a rotating shaft which passes through the body, wherein a hanging plate is provided
at a lower portion of the body, and a hitting plate is provided at an upper portion of the body;

a double torsion spring coupled to both sides of the rotating shaft, and configured to provide an elastic restoring force
to enable the shooter to rotate; and

a crossbar configured to include a hanger that contacts the hanging plate and limits a movement of the shooter,
wherein the hanger is formed in a stair type, and comprises a first hanging part and a second hanging part,
wherein under a normal state, the hanging plate of the shooter is fixed in contact with the first hanging part of the crossbar,
and during a trip operation a rotatable range of the shooter is limited by the second hanging part.

US Pat. No. 9,310,421

APPARATUS FOR TESTING THYRISTOR VALVE

LSIS CO., LTD., Anyang-s...

1. An apparatus for testing a thyristor valve, the apparatus comprising:
a current source circuit that provides an electric current when a thyristor valve as a test target is turned on;
a voltage source circuit that provides a reverse voltage or a forward voltage when the thyristor valve is turned off;
a first auxiliary valve provided between a connection point between the thyristor valve and the voltage source circuit and
the current source circuit, and that insulates the current source circuit from the voltage source circuit to protect the current
source circuit from a high voltage of the voltage source circuit; and

an auxiliary circuit that forcibly turns off the first auxiliary valve when the thyristor valve is turned off,
wherein the auxiliary circuit comprises:
a first direct current (DC) source circuit section that generates a DC voltage for turning off the first auxiliary valve;
an auxiliary switch having one end connected to an anode output terminal of the first DC source circuit section and the other
end connected to the current source circuit; and

a capacitor having one end connected to the auxiliary switch and the other end connected to a connection point between the
current source circuit and the first auxiliary valve.

US Pat. No. 9,225,278

METHOD FOR DETERMINING PHASE ANGLE IN PHASE SHIFT TRANSFORMER FOR MEDIUM VOLTAGE INVERTER

LSIS Co., Ltd., Anyang-S...

1. A method for determining phase angle in phase shift transformer for medium voltage inverter, the inverter including a plurality
of unit power cells formed in first and second stages, one stage formed with 3-phase unit power cells, and the plurality of
unit power cells respectively connected to the phase shift transformer, the method comprising:
selecting an arbitrary phase shift angle and phase angle relative to a unit power cell of the first stage;
determining a phase angle displacement in consideration of the phase shift angle and the number of unit power cells connected
to each phase of a motor;

determining a phase angle of the unit power cell at the second stage using a phase angle of the unit power cell at the first
stage; and

adjusting a phase angle when the determined phase angle of the unit power cell at the second stage exceeds a predetermined
phase angle.

US Pat. No. 9,473,012

APPARATUS AND METHOD FOR CONTROLLING LOW VOLTAGE DC/DC CONVERTER BY USING INPUT CURRENT INFORMATION ON LOW VOLTAGE DC/DC CONVERTER

LSIS CO., LTD., Anyang-s...

1. A low voltage DC/DC converter (LDC) control apparatus for controlling an LDC including a transformer and a PWM controller,
the low voltage DC/DC converter (LDC) control apparatus comprising:
an input current calculating unit configured to calculate an input current of the LDC by using magnetization inductance information
on the transformer and effective duty information on the PWM controller;

an output current calculating unit configured to calculate the instantaneous value and average value of an output current
based on the input current calculated by the input current calculating unit; and

an LDC control unit configured to generate a control signal for over current protection (OCP) or power limit based on the
instantaneous value and average value of the output current calculated by the output current calculating unit, wherein the
LDC control unit is further configured to output the generated control signal to the PWM controller,

wherein the input current calculating unit is further configured to use the inductance L of the transformer, the magnetization
inductance Lm of the transformer, the duty D of the PWM controller, the duty error d of the PWM controller, the section efficiency
of the LDC, the number n of primary windings of the transformer and the number m of secondary windings of the transformer
that are read from the memory, the input voltage of the LDC measured at the input of the LDC, and the output voltage of the
LDC measured at the output of the LDC to calculate the input current of the LDC.

US Pat. No. 9,419,541

MULTILEVEL INVERTER

LSIS CO., LTD., Anyang-s...

1. A multilevel inverter, the multilevel inverter comprising:
a rectifier configured to provide a first rectifying voltage rectified by receiving a first three-phase voltage, a second
rectifying voltage by receiving a second three-phase voltage, a third rectifying voltage by receiving a third three-phase
voltage, and a fourth rectifying voltage by receiving a fourth three-phase voltage;

a smoothing unit configured to provide voltages of different levels to corresponding nodes of a first node, a second node,
a third node, a fourth node, and a fifth node by receiving the first to fourth rectifying voltages rectified by the rectifier;
and

an inverter unit comprising a plurality of switches configured to transmit voltages of three levels provided by the smoothing
unit,

wherein the smoothing unit comprises a first capacitor configured to smooth the first rectifying voltage, a second capacitor
configured to smooth the second rectifying voltage, a third capacitor configured to smooth the third rectifying voltage, and
a fourth capacitor configured to smooth the fourth rectifying voltage, wherein the first to fourth capacitors are serially-connected;

wherein the plurality of switches comprises:
a first switch unit interposed between the first node and a first output terminal;
a second switch unit interposed between the third node and the first output terminal;
a third switch unit interposed between the fifth node and the first output terminal;
a fourth switch unit interposed between the first node and a second output terminal;
a fifth switch unit interposed between the third node and the second output terminal; and
a sixth switch unit interposed between the fifth node and the second output terminal;
wherein the first to third switch units are included in a first leg and the fourth to sixth switch units are included in a
second leg, and an output voltage is synthesized using a potential difference between the first leg and the second leg.

US Pat. No. 9,396,868

SIGNAL COUPLING APPARATUS FOR POWER LINE COMMUNICATION

LSIS CO., LTD., Anyang-s...

1. A signal coupling apparatus for power line communication, the apparatus comprising:
a housing centrally formed with a groove to pass a power line therethrough and formed with an elastic member; and
a non-contact interface unit accommodated inside the housing to induce a power signal or a power line communication signal
from the power line using an electromagnetic induction,

wherein the non-contact interface unit comprises a first current transformer and a second current transformer, each of which
having a core wound with an electric wire,

wherein the core wound with the electric wire is molded and accommodated into the housing by dividing an internal space of
the housing and a cylindrical hole is formed at a center of the core to warp a periphery of the power line

wherein the first current transformer induces the power signal as a signal on a secondary side and is formed with a non-oriented
first material excellent in saturation characteristic in high current, and

wherein the second current transformer induces the power line communication signal as a signal on the secondary side and is
formed with a second material smaller in attenuation in a frequency band different from that of the first material.

US Pat. No. 9,240,703

POWER SUPPLY SYSTEM FOR ELECTRIC VEHICLE AND CONTROL METHOD THEREOF

LSIS Co., Ltd., Anyang-S...

1. A power supply system for an electric vehicle (EV), the system comprising:
a high voltage battery formed with a plurality of battery cells to generate a power driving source for a motor of the EV;
a low voltage battery generating a power driving source for an electrical load; and
an OBC (On-Board-Charger) selectively charging the high voltage battery or the low voltage battery using an externally-supplied
AC power source based on an output voltage level of the low voltage battery,

wherein the OBC comprises:
a high voltage converter converting the AC power source to a first DC voltage for use as a power charging source for the high
voltage battery;

a low voltage converter converting the AC power source to a second DC voltage for use as a power charging source of the low
voltage battery and as a power driving source for the electrical load; and

a controller comparing an output voltage level of the low voltage battery with a predetermined voltage level to selectively
drive the high voltage converter or the low voltage converter,

wherein the controller comprises a switch having a first terminal fixedly connected to the low voltage battery and a second
terminal selectively connected to the low voltage converter or the high voltage converter, and

wherein the second terminal is connected to the low voltage converter if the output voltage level of the low voltage battery
is less than the predetermined voltage level and the second terminal is connected to the high voltage converter if the output
voltage level of the low voltage battery is greater than the predetermined voltage level.

US Pat. No. 9,368,305

INSTANT TRIP DEVICE OF CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. An instant trip device of a circuit breaker, the instant trip device comprises:
a magnet configured to generate a magnetic absorbing force with power applied thereto;
a supporter disposed at a side opposite to the magnet;
an armature is provided between the magnet and the supporter, and including a rotation center portion and a rotating part
is disposed to be rotatable with respect to the rotation center portion; and

an armature spring configured to apply an elastic force in a direction where the rotating part of the armature becomes farther
away from the magnet,

wherein,
a groove of which one side is opened is formed at the supporter to support the rotation center portion of the armature,
a boss is formed at the rotation center portion of the armature to be inserted into the groove, and
the armature spring is an extension spring in which one end of the armature spring is supported by a first hanger included
in the supporter, and the other end is supported by a second hanger included in the rotating part of the armature,

wherein the opened one side of the groove is formed in a direction of the rotating part,
wherein the supporter comprises a spring accommodating part which is formed at a side of the first hanger to pass through
the supporter, so that there is no interference between the supporter and the armature spring.

US Pat. No. 9,343,245

MOLDED CASE CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A molded case circuit breaker, comprising:
a case;
a power side terminal portion and a load side terminal portion formed at two sides of the case;
a mounter installed at the terminal portion with a structure to enclose a terminal connector connected to the terminal portion,
wherein the mounter includes:
a mounting surface for mounting the terminal connector;
insulation surfaces extending from two side edges of the mounting surface, and spaced from each other, wherein the terminal
connector is placed between the insulation surfaces;

a cover surface having an opening, and connecting rear portions of the insulation surfaces so as to cross the insulation surfaces
and the mounting surface and cover space between the insulation surfaces, and

an insulation distance extension portion protruding from a rear surface of the cover surface in a direction that the terminal
connector is inserted into the mounting surface.

US Pat. No. 9,202,642

MAGNETIC CONTACTOR

LSIS Co., Ltd., Anyang-S...

1. A magnetic contactor comprising:
a frame configured to include a fixed contact which is connected to a power source and a load;
a holder movably provided in the frame, and configured to include a movable contact and a fixed contact which are disposed
to contact each other and to be separated from each other;

a movable core coupled to one end of the holder, and configured to include a switch manipulating part;
a bobbin configured to include a coil which is wound around an outer surface, wherein the bobbin generates a magnetic force
when external power is applied to the coil;

a fixed core coupled to the bobbin;
an elastic member disposed between the holder and the bobbin, wherein the elastic member restores the movable core to an original
position when the external power is cut off;

an inverting switch provided within a moving range of the switch manipulating part, wherein an internal contact of the inverting
switch is inverted when the inverting switch is contacted by switching manipulating part;

an electronic circuit part configured to include a voltage dropping element, and receive an inversion signal from the inverting
switch to control a current applied to the coil; and

a normal position member configured to fix the switch manipulating part to a normal switch to induce a contact between the
inverting switch and the switch manipulating part.

US Pat. No. 9,090,166

METHOD OF MANAGING PROGRAM FOR ELECTRIC VEHICLE

LSIS Co., Ltd., Anyang-S...

1. A method of updating an electric vehicle, the method comprising:
obtaining operating metadata of a first parameter of an operating program for an electronic subassembly of the electric vehicle,
the operating metadata including an update time and an update date of the first parameter of the operating program, and wherein
the first parameter comprises a first value that was updated at the update time and the update date of the first parameter;

obtaining parameter metadata of a second parameter that corresponds to the first parameter of the operating program, the parameter
metadata including an update time and an update date of the second parameter, and wherein the second parameter comprises a
second value that was updated at the update time and the update date second parameter;

updating the update time, the update date, and the second value of the second parameter of the parameter metadata respectively
with the update time, the update date, and the first value of the first parameter of the operating metadata when the operating
metadata of the first parameter is not equal to the parameter metadata of the second parameter; and

executing the operating program when the operating metadata of the first parameter is equal to the parameter metadata of the
second parameter.

US Pat. No. 9,425,004

REINFORCED PIN WHICH HINGE COUPLES A ROTATABLE SHAFT TO THE TRANSFER LINK IN A CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A circuit breaker, comprising:
a stationary contact installed in a fixed manner;
a movable contact configured to be brought into contact with or separated from the stationary contact; and
a switching mechanism configured to switch the movable contact,
wherein the switching mechanism comprises:
a shaft rotatably installed therein;
a transfer link configured to transfer a driving force from the shaft to the movable contact; and
a pin configured to hinge-couple the shaft to the transfer link and insulate them from each other,
wherein the pin is installed with a wear resistant member at a portion brought into contact with a shaft arm of the shaft,
wherein the pin comprises an insulating member formed in a cylindrical shape,
wherein the wear resistant member is formed with a pipe and attached to the portion brought into contact with the shaft arm
of the shaft, and

wherein the wear resistant member is installed on the insulating member in a fixed manner not to be released therefrom.

US Pat. No. 9,384,927

ELECTRIC VEHICLE RELAY

LSIS CO., LTD., Anyang-s...

1. An electric vehicle relay, comprising:
a pair of fixed electrodes;
a movable electrode movable to contact or to be separated from the fixed electrode;
a driving shaft which performs a vertical motion as an upper end thereof is coupled to the movable electrode;
a fixed core fitted into a central part of the driving shaft with a gap;
a movable core coupled to a lower end of the driving shaft and sucked by a magnetic force of the fixed core; and
a cylinder configured to insertion-support the fixed core and the movable core,
wherein locking protrusions are formed on an outer circumferential surface of the movable core,
wherein inclined grooves for inserting the locking protrusions are formed on an inner circumferential surface of the cylinder,
and

wherein the movable electrode is rotated as the locking protrusions are moved along the inclined grooves when the movable
core performs an up-down motion.

US Pat. No. 9,269,113

ENERGY MANAGEMENT SYSTEM AND A SCREEN GENERATION METHOD THEREOF

LSIS Co., Ltd., Anyang-S...

1. A system visualization modeling method for an energy management system, the method comprising:
displaying on a display of the energy management system a first screen comprising a schematic diagram including a plurality
of objects corresponding to facilities to be monitored in an electric power system;

arranging one or more connections between the plurality of objects corresponding to connections between the facilities to
be monitored;

generating a file comprising information on the arranged connections between the facilities and information of the first screen;
storing the generated file in a memory of the energy management system; and
displaying on the display a second screen for monitoring the facilities during a real-time operation of the energy management
system according to the generated file stored in the memory, wherein the second screen comprises the information of the first
screen and the schematic diagram indicating the connection between facilities;

wherein the generated file further comprises:
screen information comprising screen size and background color information of the first screen;
object information related to a kind, location, size, and facility type of one or more facilities contained in the generated
first screen; and

connection information related to connection location information between each object of the object information.

US Pat. No. 9,331,611

METHOD FOR CONTROLLING SYNCHRONOUS SWITCH CHANGE IN MEDIUM VOLTAGE INVERTER

LSIS CO., LTD., Anyang-s...

1. A method for controlling a system configured to supply an electric power to a motor by switching a first switch connected
to a medium voltage inverter to a second switch connected to a commercial power source, the method comprising:
lighting on a first lamp to notify that a switching operation is ready, by ascertaining that the medium voltage inverter is
in a normal operation, and ascertaining that the first switch is turned on and the second switch is turned off;

receiving an input of a third switch to notify that a switching to a bypass mode is made and an input of a fourth switch to
request to start a switching operation;

lighting on a second lamp to notify that a switching operation is under way;
synchronizing a current of the medium voltage inverter with that of the motor;
turning on the second switch, and turning off the first switch; and
lighting on a third lamp to notify that the switching operation is completed.

US Pat. No. 9,331,485

HVDC VALVE TOWER

LSIS CO., LTD., Anyang-s...

1. A HVDC valve tower comprising:
a cylindrical valve module loading part having a plurality of stacked layers, wherein each layer of the stacked layers comprises
a bottom frame and a plurality of sliding parts, each of the sliding parts is coupled to the bottom frame to be slideable
in a radial direction;

a valve module loaded on a respective one of the sliding parts of the valve module loading part; and
a crane rotatably disposed at a center of a top layer of the plurality of the stacked layers of the valve module loading part.

US Pat. No. 9,306,767

EXPANDABLE ETHERNET RING TOPOLOGY NETWORK AND COMMUNICATION METHOD THEREOF

LSIS CO., LTD., Anyang-s...

1. An expandable Ethernet ring network comprising:
a plurality of nodes connected in a ring shape through Ethernet ports to form a first ring topology network, the first ring
topology network includes one or more expandable nodes, each of which includes three or more Ethernet ports;

wherein the expandable node further comprises a setting unit for setting a way of connecting the first ring topology network
to other networks,

wherein the setting unit, in accordance with a first user setting of a switch of the setting unit, connects a first Ethernet
port and a second Ethernet port of the expandable node to respective Ethernet ports of nodes of another ring topology network,
and

wherein the setting unit, in accordance with a second user setting of the switch of the setting unit, connects the first Ethernet
port of the expandable node to an Ethernet port of a node of a first linear topology network and connect the second Ethernet
port of the expandable node to an Ethernet port of a node of a second linear topology network.

US Pat. No. 9,106,092

APPARATUS FOR DISCHARGING DC-LINK CAPACITOR FOR ELECTRIC VEHICLE CHARGER

LSIS Co., Ltd., Anyang-S...

1. An apparatus for charging a high voltage battery of an electric vehicle by converting an AC power source to a DC power
source, the apparatus comprising:
a rectifier configured to receive the AC power source and convert the AC power source to a rectified DC power source;
a boost PFC (Power Factor Control) circuit configured to correct a power factor by receiving the rectified DC power source;
a DC-link capacitor configured to be charged when connected to an output of the boost PFC circuit;
a DC-DC converter configured to charge the high voltage battery by converting a voltage charged in the DC-link capacitor;
a controller configured to control the rectifier, the boost PFC circuit and the DC-DC converter; and
an auxiliary power supply unit connected to the DC-link capacitor and configured to supply a power source to the controller
when the apparatus operates abnormally, the power source supplied by:

discharging a voltage charged in the DC-link capacitor;
converting the discharged voltage; and
providing the converted voltage to the controller.

US Pat. No. 9,082,027

NEAR FIELD COMMUNICATION TAG READER, MOBILE TERMINAL FOR INTERWORKING WITH THE READER, AND OPERATING METHOD THEREOF

LSIS Co., Ltd., Anyang-S...

1. An operation method for a mobile terminal the method comprising:
acquiring an item group identifier from a near field communication tag reader by recognizing an item group identification
tag and an item identification tag;

acquiring item group information related to an item group corresponding to the item group identifier;
acquiring an item identifier from the near field communication tag reader;
extracting information from the item group information, the extracted information related to an arrangement location of an
item corresponding to the item identifier;

determining that the item has been incorrectly arranged based on the arrangement location and an identified location of the
item corresponding to the item identifier; and

displaying information indicating that the item has been incorrectly arranged.

US Pat. No. 9,415,695

ELECTRIC VEHICLE CHARGER

LSIS CO., LTD., Anyang-s...

1. An electric vehicle charger comprising:
a case comprising:
a lower case portion having a top opening and comprising a connector insertion groove at a side surface; and
an upper case portion having a bottom opening and configured to cover the top opening of the lower case;
a circuit board seated on the lower case and on which at least one electrical component of a short-circuit detection part
detecting short-circuit of an electric vehicle is positioned, the at least one electrical component including a detection
part configured to detect overvoltage and overcurrent during charging of the electric vehicle, a communication module configured
to communicate with a charging control part of the electric vehicle, and a display part configured to display a charged state
of the electric vehicle;

a cable inserted into the lower case portion and electrically connected to the circuit board; and
a cable connector inserted into the connector insertion groove to position the inserted cable and configured to prevent moisture
from being introduced into the case, the cable connector comprising:

a connector body configured to be slidably inserted into the connector insertion groove;
a guide sleeve through which the cable passes and extending from a surface of the connector body; and
a bracket configured to surround an outer surface of the guide sleeve to fix the guide sleeve,
wherein first and second coupling openings are respectively defined at a first side and a second side of the bracket and the
first and second sides of the bracket are seated on at least one coupling boss protruding from the lower case portion,

wherein the first and second sides of the bracket are secured to the at least one coupling boss by at least one coupling member
which passes through the first and second coupling openings and is inserted into the at least one coupling boss, and

wherein the guide sleeve is fixed to the inside of the lower case.

US Pat. No. 9,373,469

MOLDED CASE CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A molded case circuit breaker, comprising:
a case provided with a power side terminal portion and a load side terminal portion to which a power side external terminal
and a load side external terminal are respectively connected;

an interrupter assembly installed in the case and provided with an arc gas outlet for externally discharging arc gas generated
from inside the interrupter assembly;

an exhaustion guiding portion disposed between the interrupter assembly and the load side terminal portion and comprising
a gas divergence portion configured to provide an arc gas passage diverged to two vent chutes of the load side terminal portion;

an exhaustion cover mounted to the case configured to cover the exhaustion guiding portion; and
exhaustion guides spaced from each other in the exhaustion guiding portion in a direction perpendicular to an arc gas discharge
direction, wherein the gas divergence portion is disposed between the exhaustion guides and the arc gas passage is formed
by the exhaustion guides and the gas divergence portion,

wherein the exhaustion guiding portion comprises an opening facing an installation surface of the molded case circuit breaker
and the exhaustion cover is detachably mounted to a lower surface of the case and configured to open and close the opening
of the exhaustion guiding portion.

US Pat. No. 9,331,601

INVERTER WITH POWER CELL OF DUAL STRUCTURE

LSIS Co., Ltd., Anyang-S...

1. An inverter with power cell of dual structure, the inverter comprising:
a first SMPS (Switching Mode Power Supply) connected to a first power cell region;
a second SMPS connected to a second power cell region; and
a controller connecting the first and second SMPSs;
wherein:
each phase of the inverter is formed by serially connecting a plurality of power cells formed with a plurality of stages operated
by receiving power supplied from a phase shift transformer; and

each of the plurality of power cells is mutually connected and comprises the first power cell region and the second power
cell region configured to independently operate;

wherein the first power cell region comprises:
a first rectification unit comprising thyristors for preventing an inrush current and configured to perform rectification
by receiving power from the phase shift transformer;

a first capacitor connected to the first rectification unit and configured to generate a first DC link voltage by smoothing
a voltage rectified by the first rectification unit; and

a first inverter unit configured to generate a PWM voltage by switching in response to control by the first SMPS;
wherein the second power cell region comprises:
a second rectification unit comprising thyristors for preventing an inrush current and configured to perform rectification
by receiving power from the phase shift transformer;

a second capacitor connected to a second rectification unit and configured to generate a second DC link voltage by smoothing
a voltage rectified by the second rectification unit; and

a second inverter unit connected to the first inverter unit and configured to generate a PWM voltage by switching in response
to control by the second SMPS; and

wherein:
the first inverter unit includes first and second inverter groups each formed with a plurality of unit inverters;
the second inverter unit includes third and fourth inverter groups each formed with a plurality of unit inverters; and
the first inverter group is connected to the third inverter group at a first contact point and the second inverter group is
connected to the fourth inverter group at a second contact point.

US Pat. No. 9,311,758

VEHICLE CONTROL DEVICE AND METHOD

LSIS CO., LTD., Anyang-s...

1. A method for a vehicle control system, the method comprising:
collecting, via a communication unit in the vehicle, data in a first communication data format from any of a plurality of
electronic units located in the vehicle, wherein the data comprises operational and state data of an electronic unit among
the plurality of electronic units;

storing the collected data in the first communication data format in a first receiving buffer memory;
converting the data stored in the first communication data format into a second communication data format in order to be wireless
transmitted to a device that is physically external to the vehicle;

storing the converted data in the second communication data format in a second receiving buffer memory;
wirelessly transmitting, via a wireless communication unit in the vehicle, the stored data in the second receiving buffer
memory to the device;

receiving, via the wireless communication unit, control data in the second communication data format from the device, wherein
the control data corresponds to the stored data that was wirelessly transmitted;

storing the received control data in the second communication data format in a first transmitting buffer memory;
converting the received control data in the second communication data format into the first communication data format by dividing
the received control data into plural data each having a communication size that is a maximum communication size of the first
communication data format;

storing the plural data comprising the converted control data in the first communication data format in a second transmitting
buffer memory;

outputting the plural data comprising the converted control data in the first communication data format that is stored in
the second transmitting buffer memory to the communication unit; and

communicating, via the communication unit in the vehicle, the plural data in the first communication data format to the electronic
unit within the vehicle.

US Pat. No. 9,093,838

FAULT CURRENT DETECTING CIRCUIT

LSIS Co., Ltd., Anyang-S...

1. A fault current detecting circuit comprising:
a current detection unit configured to detect a current flowing in an electric power circuit in an electric power system and
output a current detection signal;

a first comparing circuit unit configured to compare the current detection signal with a predetermined reference current value
and output a first output signal when the current detection signal is greater than or equal to the reference current value;

a differentiator configured to differentiate the current detection signal output from the current detection unit to output
a change slope of the current detection signal;

a second comparing circuit unit configured to compare the change slope with a predetermined reference change slope value and
output a second output signal when the change slope of the current detection signal is greater than or equal to the reference
change slope value;

a third comparing circuit unit configured to compare the current detection signal with a predetermined current detection limit
reference value and output a third output signal when the current detection signal is greater than or equal to the current
detection limit reference value; and a trip determining unit connected to the first comparing circuit unit, the second comparing
circuit unit, and the third comparing circuit unit to receive the first output signal, the second output signal, and the third
output signal, and output a trip control signal only when the first output signal and the second output signal are maintained
to be received and the third output signal is not received during a predetermined short period of time, wherein the predetermined
short period of time is determined as a value ranging from 50 microseconds (?s) to 100 microseconds (?s).

US Pat. No. 9,123,491

GAS INSULATED SWITCHGEAR

LSIS CO., LTD., Anyang-S...

1. A gas insulated switchgear comprising:
an enclosure;
a stationary contact arm fixedly installed within the enclosure;
a movable contact arm movably installed within the enclosure such that it can be brought into contact with or separated from
the stationary contact arm;

a cam moving the movable contact arm by reciprocating between a closing position and an opening position; and
an actuator moving the cam,
wherein the cam comprises an opening cam surface allowing the movable contact arm to move away from the stationary contact
arm and a closing cam surface allowing the movable contact arm to move toward the stationary contact arm,

wherein the opening cam surface comprises first and second cam surfaces,
wherein movement acceleration of the movable contact arm by the first cam surface is greater than movement acceleration of
the movable contact arm by the second cam surface when the actuator moves the cam to the opening position, and

wherein a movement distance of the movable contact arm by the first cam surface is less than a movement distance of the movable
contact arm by the second cam surface when the actuator moves the cam to the opening position.

US Pat. No. 9,112,437

METHOD OF DETECTING DISCONNECTION STATE OF POWER CABLE IN INVERTER SYSTEM

LSIS Co., Ltd., Anyang-S...

1. A method of detecting disconnection of a power cable in an inverter system, the method comprising:
driving of a motor;
determining if a driving speed of the motor exceeds a reference speed;
determining if a phase current instruction value to drive the motor is greater than a first reference value if the driving
speed of the motor exceeds the reference speed; determining if an actual phase current applied to the motor is less than a
second reference value if the phase current instruction value is greater than the first reference value; and

turning off a main relay if the actual phase current is less than the second reference value and no longer driving the motor,
wherein the first reference value is set to 50% of a theoretical current instruction value corresponding to a torque instruction;
and

wherein the second reference value is set to a value greater then zero.

US Pat. No. 9,153,951

APPARATUS FOR DETECTING SURGE VOLTAGE AND METHOD THEREOF

LSIS Co., Ltd., Anyang-S...

1. An apparatus for detecting surge voltage, the apparatus comprising:
a voltage distributor configured to generate a driving voltage when an applied surge voltage exceeds a reference surge voltage;
a signal output unit configured to generate an output signal when driven by the generated driving voltage, the signal output
unit comprising a current limiting resistor element and a shunt regulator serially connected between two contacts configured
to detect the applied surge voltage; and

a surge voltage detection signal output unit configured to output a surge voltage detection signal indicating that the applied
surge voltage exceeds the reference surge voltage in response to the output signal from the signal output unit, the surge
voltage detection signal output unit a photo coupler connected directly across and in parallel with the current limiting resistor
element,

wherein the shunt regulator is connected in parallel with the voltage distributor.

US Pat. No. 9,107,319

DC LINK CAPACITOR ASSEMBLY

LSIS Co., Ltd., Anyang-S...

1. A DC link capacitor assembly comprising:
a DC link capacitor disposed within a housing,
wherein the housing comprises:
a top surface;
a bottom surface disposed spaced downward from the top surface;
at least one side surface connecting the top surface to the bottom surface;
an opening defined at a front side between the top surface and the bottom surface;
an external capacitor accommodation part disposed outside the at least one side surface; and
a through-hole defined in the at least one side surface disposed on a side opposite to the opening,
wherein:
the external capacitor accommodation part comprises at least two external capacitor accommodation parts that are spaced apart
from each other; and

the through-hole is defined between the two external capacitor accommodation parts.

US Pat. No. 9,104,999

OUTAGE SCHEDULE MANAGEMENT APPARATUS AND METHOD IN EMS

LSIS CO., Ltd., Anyang-S...

1. An outage schedule management apparatus, comprising:
a controller performing a topology change for applying a relevant imaginary outage schedule to a system in response to an
outage schedule set up by a user input, determining validity of a system operation standard by performing a power flow calculation
relative to the changed topology, a fault calculation and a credible accident interpretation and approving the outage schedule
based on the determined validity; and

a first storage storing the outage schedule control of the controller,
wherein the controller further determines the validity in response to a result of the credible accident interpretation and
by:

calculating a breaking capacity of a line circuit breaker by performing a first fault calculation on the entire system;
performing a second fault calculation by applying the outage schedule to the calculated breaking capacity; and
comparing a result of the first fault calculation with a result of the second fault calculation.

US Pat. No. 9,087,664

CIRCUIT BREAKER WITH COMPACTABLE CONTACT STRUCTURE

LSIS Co., Ltd., Anyang-S...

1. A circuit breaker, comprising:
a tank;
a stationary portion provided at one side within the tank; and
a movable portion provided at the other side within the tank to move while facing the stationary portion so as to conduct
or block a current through the operation of being brought into contact with or separated from the stationary portion,

wherein the movable portion comprises:
a puffer cylinder configured to temporarily store a compressible fluid;
a moving main contact assembled to an end of the puffer cylinder to have an accommodation space in the moving main contact;
and

a moving nozzle inserted into the moving main contact, and
wherein the moving main contact comprises a plurality of internal protrusions protruded in a radial direction and separated
in a circumferential direction from an inner surface of the moving main contact, and

the moving nozzle comprises a plurality of external protrusions protruded in a radial direction and separated in a circumferential
direction on an external surface of moving nozzle, and

wherein the internal and external protrusions are alternately disposed to each other along the circumferential direction,
and

the internal and external protrusions are coupled to the puffer cylinder, respectively, by a fastening member.

US Pat. No. 9,191,002

DATA PROCESSING APPARATUS AND METHOD IN PLC SYSTEM

LSIS Co., Ltd., Anyang-S...

1. A data processing method in a programmable logic controller (PLC) system comprising an OR gate and an output buffer, the
method comprising:
outputting first dummy code data having a first chip address to the OR gate;
outputting first valid data to the output buffer after the first dummy code data is output;
outputting second dummy code data having a second chip address to the OR gate after the first valid data is output;
outputting second valid data to the output buffer after the second dummy code data is output;
outputting the same first dummy code data to the OR gate after the second valid data is output; and
outputting the same first valid data to the output buffer after the same first dummy code data is output,
wherein the first chip address is different from the second chip address.

US Pat. No. 9,413,548

ETHERCAT-BASED NETWORK SYSTEM AND OPERATION METHOD THEREOF

LSIS CO., LTD., Anyang-s...

1. An EtherCAT-based network system comprising:
one or more slave devices, wherein the one or more slave devices are host computers;
a master device configured to connect to and operate the slave devices in response to an operating transmission PDO (Process
Data Object) list or an operating reception PDO list, wherein the master device is a host computer; and

a host computer configured to extract the operating transmission PDO list or the operating reception PDO list from an information
file of the slave devices and provide the extracted list to the master device,

wherein the information file includes identity information of the slave devices, PDO list item changeable information, one
or more transmission PDO lists, and one or more reception PDO lists,

wherein the transmission PDO list and the reception PDO list include an essential PDO item, an auxiliary PDO item, or a selection
PDO item, and

wherein the host computer is further configured to
retrieve the transmission PDO list or the reception PDO list;
determine whether the essential PDO item is present in the retrieved PDO list;
determine the PDO item changeable information when the essential PDO item is present;
select a PDO list having a largest number of auxiliary PDO items;
determine if a number of the selected PDO list is one; and
extract the selected PDO list as the operating PDO list when the number of the selected PDO list is one.

US Pat. No. 9,343,257

CIRCUIT BREAKER WITH A MAGNET FIXING MEANS

LSIS CO., LTD., Anyang-s...

1. A circuit breaker comprising:
a heater generating heat due to a conduction current induced by a moving contact of the circuit breaker;
a bimetal deformed due to heat generated by the heater to separate a contact point of the moving contact;
a magnet generating a magnetic force to move an armature bar when a current above a previously set reference current is induced;
a case accommodating the bimetal and magnet, at least part of the case made of a synthetic resin material;
a magnet fixing portion integrally formed in the case and made of a synthetic resin material; and
a bimetal fixing bolt fixing the bimetal to the heater,
wherein the heater is fixed to the magnet fixing portion by a heater fixing bolt,
wherein the magnet is fixed to the magnet fixing portion by a magnet fixing bolt,
wherein a separating gap exists between the heater and the magnet, and
wherein a bolt accommodation portion is formed at the heater to prevent the magnet fixing bolt from contacting the heater.

US Pat. No. 9,340,393

METHOD FOR MEASURING OPENING AND CLOSING DELAY TIME OF ELEVATOR BRAKE

LSIS CO., LTD., Anyang-s...

1. A method for measuring opening and closing delay time of a drum type brake of a rope type elevator, the method comprising:
outputting, by a brake signal output unit, a brake control signal for brake opening/closing in order to control the brake;
outputting, by a brake signal checking unit, a brake opening control signal or a brake closing control signal by determining
whether the brake control signal is a brake opening signal or a brake closing signal by receiving the brake control signal;

starting to count and outputting an accumulated count value, by a brake counter unit, while the brake counter unit receives
the brake opening control signal or the brake closing control signal;

outputting, by a motor drive determination unit, a motor operation determination signal by starting a motor drive determination
from an initial point having received the count value, and by checking a point in which a drive state of a motor driving the
elevator is changed from a stop state to an operation state;

outputting, by the motor drive determination unit, a motor stop determination signal by starting a motor drive determination
from an initial point having received the count value, and by checking a point in which a drive state of the motor driving
the elevator is changed from an operation state to a stop state;

computing, by the motor drive determination unit, a brake opening delay time for opening the brake, using the count value
of the brake counter unit at a point of the motor operation determination signal being output; and

computing, by the motor drive determination unit, a brake closing delay time for closing the brake, using a count value of
the brake counter unit at a point of the motor stop determination signal being output.

US Pat. No. 9,190,828

DETECTING CIRCUIT FOR CIRCUIT BREAKER

LSIS Co., Ltd., Anyang-S...

1. A detecting circuit for a circuit breaker, comprising:
a detection sensor configured to output a detection signal by detecting a voltage or a current on an alternating current electric
power circuit;

a low pass filter connected to an output terminal of the detection sensor, and configured to output a signal from the detection
sensor after removing a high frequency component from the signal from the detection sensor;

an offset remover connected to an output terminal of the low pass filter, and configured to output a signal from the low pass
filter after removing a direct current offset from the signal;

an amplifier connected to an output terminal of the offset remover, and configured to amplify a signal from the offset remover
and to output the signal;

a comparator configured to output a breaking control signal such that the is circuit breaker operates to a circuit breaking
position, if the detection signal input to the amplifier is equal to or larger than a reference voltage; and

a sampling circuit connected to an output terminal of the amplifier, and configured to output a signal in a sampling manner
from an output signal from the amplifier, at predetermined frequency intervals.

US Pat. No. 9,190,203

TRANSFORMER COOLING APPARATUS AND TRANSFORMER ASSEMBLY INCLUDING THE SAME

LSIS Co., Ltd., Anyang-S...

1. A transformer cooling apparatus comprising:
a first plate on which a transformer is seated, the transformer comprising a coil and a magnetic member including a first
magnetic part and a second magnetic part;

a first protrusion configured to protrude from an upper surface of the first plate to contact the first magnetic part;
a second protrusion configured to protrude from the upper surface of the first plate to contact the second magnetic part;
a recess defined between the first protrusion and the second protrusion and shaped to accommodate at least a portion of the
transformer;

a second plate spaced apart from the first plate;
third and fourth protrusions configured to protrude from a lower surface of the first plate to contact the second plate;
a coolant passage in which a coolant flows, the coolant passage being defined by a lower surface of the first plate, an upper
surface of the second plate, and the third and fourth protrusions;

a coil mount positioned in an accommodation space defined by the first and the second magnetic parts, the accommodation space
having a mounting space in which the coil is mounted; and

a partition rib partitioning the mounting space into a plurality of spaces;
wherein at least a portion of the coil mount, the coil, and the partition rib is received in the recess part.

US Pat. No. 9,178,967

HART ANALOG INPUT MODULE WITH DIFFERENTIAL INPUT STAGE

LSIS Co., Ltd., Anyang-S...

1. A Highway Addressable Remote Transducer (HART) analog input module with a differential input stage, the HART analog input
module comprising:
a plurality of input stage processors each connected to one of a plurality of HART field devices to detect a DC signal and
a HART communication signal from a signal superimposed with the DC signal and the HART communication signal from the corresponding
HART field device and to output the detected DC signal and HART communication signal;

a multiplexer sequentially outputting the DC signal and HART communication signal from each of the plurality of input stage
processors in response to a control signal;

an A/D conversion processor converting a DC signal of each channel sequentially output from the multiplexer to a digital signal;
a HART modem demodulating a HART communication signal of each channel sequentially output from the multiplexer; and
a controller providing the control signal to the multiplexer and processing the digital signal output from the A/D conversion
processor and the demodulated HART communication signal output from the HART modem.

US Pat. No. 9,471,724

APPARATUS AND METHOD FOR ESTIMATING RAILWAY VEHICLE MASSES

LSIS CO., LTD., Anyang-s...

1. An apparatus for estimating each railway vehicle mass and rail gradient of a plurality of railway vehicles in a train including
the plurality of railway vehicles, the apparatus comprising:
a modeling unit configured to dynamically model the train by:
receiving, via a speed sensor, a speed of the train;
receiving, via acceleration sensors, an acceleration of each of the plurality of railway vehicles;
receiving, via a traction device, a traction of the plurality of railway vehicles, wherein the speed, the acceleration, and
the traction are received when the train is at an initial acceleration section of a railway and when the train is at a straight
section of the railway; and

an estimation unit configured to estimate masses of the plurality of railway vehicles and railway gradient using a dynamic
modeling modeled by the modeling unit; and

wherein the modeling unit models in such a manner that a sum of multiplication of the masses of the plurality of railway vehicles
by acceleration of each railway vehicle is a value in which traction of each railway vehicle is deducted by a gradient resistance
of each railway vehicle, a running resistance of each railway vehicle, and curving resistance of each railway vehicle.

US Pat. No. 9,431,799

STRUCTURE OF THREE-PHASE INTEGRATED BUS IN GAS INSULATED SWITCHGEAR

LSIS CO., LTD., Anyang-s...

1. A structure of a three-phase integrated bus in a gas insulated switchgear (GIS), the structure comprising an enclosure,
three phase conductors inserted in the enclosure, and spacers coupled to both sides of the enclosure to fix the three phase
conductors,
wherein the three phase conductors are arranged in a shape of inverted triangle with respect to a specific orientation,
wherein one of the three phase conductors is entirely located in a lower position than the other two of the three phase conductors
with respect to the same specific orientation,

wherein the one of the three phase conductors that is entirely located in the lower position is formed in a shape of straight
pipe, and has a branch bus upwardly led out from its middle portion with respect to the same specific orientation, and

wherein each of two conductors located at an upper end of the inverted triangle, of the three phase conductors, has both side
portions formed in a shape of straight pipe and a middle portion outwardly curved in opposite directions from the branch bus
with respect to the same specific orientation such that the branch bus extends between the two conductors.

US Pat. No. 9,275,814

MAGNETIC CONTACTOR

LSIS Co., Ltd., Anyang-S...

1. A magnetic contactor comprising:
a frame configured to include a fixed contact;
a holder movably provided in the frame, and configured to include a movable contact which is contactable with the fixed contact;
a movable core coupled to the holder to interoperate with the holder;
a bobbin fixed to and provided in the frame, and configured to include a coil;
a fixed core coupled to a side of the bobbin, and configured to absorb the movable core with a magnetic force;
an elastic member provided between the holder and the bobbin;
a b-contact switch configured to sense a closing completion time of the movable contact by using a mechanical mechanism relationship
with the movable core;

an electronic circuit part configured to receive a sensing signal from the b-contact switch and limit a current applied to
the coil; and

a switch manipulation member provided at one end of the movable core, and configured to operate the b-contact switch,
wherein the electronic circuit part is provided at a width-direction side of the bobbin in parallel with a moving direction
of the movable core, and

the b-contact switch is disposed at an end of one side of the electronic circuit part and on a moving line of the switch manipulation
member.

US Pat. No. 9,214,875

MULTILEVEL INVERTER

LSIS Co., Ltd., Anyang-S...

1. A multilevel inverter, the multilevel inverter comprising:
a phase shift transformer configured to output a first voltage of predetermined phase by receiving AC input power having a
fixed frequency;

a plurality of serially-connected unit power cells configured to output a second voltage having a predetermined phase by receiving
the first voltage from the phase shift transformer; and

a master controller configured to exchange data with a unit power cell controller included in each of the plurality of serially-connected
unit power cells,

wherein the phase shift transformer is configured to include a number of phase shifts corresponding to a number of the plurality
of serially-connected unit power cells,

wherein an operation basic format for each of the plurality of serially-connected unit power cells is transmitted from the
master controller to the corresponding unit power cell controller via optical communication, the operation basic format including
an output voltage command and a synchronous signal, and

wherein information is transmitted from each unit power cell controller to the master controller, the information indicating
at least an over-voltage, an under-voltage, an arm short-circuit, a ground, an open fuse, a heat sink overheat, abnormal hardware,
an open phase of an output of the corresponding unit power cell or an open phase of an input of the corresponding unit power
cell.

US Pat. No. 9,154,509

INTELLIGENT ELECTRIC DEVICE AND NETWORK SYSTEM INCLUDING THE DEVICE

LSIS Co., Ltd., Anyang-S...

1. A network system comprising:
an Ethernet communication device;
an upper-level monitoring device positioned between an outside Internet and the Ethernet communication device;
a firewall positioned between the outside Internet and the upper-level monitoring device and being configured to permit checking
compatibility or suitability of data through an authentication process of the system; and

at least one protection relay configured to:
determine a process of data received through the Ethernet communication device;
store a first security level of a plurality of systems and a second security level of a plurality of source addresses;
check a security level of a system among the plurality of systems that transmits the data based on the first security level
and check a security level of a source address among the plurality of source addresses that is included in the data based
on the second security level prior to and during processing the data to permit re-checking compatibility or suitability of
data that have passed the firewall through an authentication process of the source address;

generate a signal including information instructing whether to short-circuit power based on results of the checking,
wherein the received data includes at least information related to monitoring or controlling the at least one protection relay
or information related to monitoring or controlling an upper-level host of the at least one protection relay,

wherein the security level of the system is determined based on use or non-use of the information related to monitoring or
controlling the upper-level host, and

wherein the first security level uses an IP address and a subnet address of the upper-level host, and the second security
level uses an MAC address of the upper-level host.

US Pat. No. 9,154,044

APPARATUS FOR ESTIMATING CAPACITANCE OF DC-LINK CAPACITOR IN INVERTER

LSIS Co., Ltd., Anyang-S...

1. An apparatus for estimating capacitance of a DC link capacitor of a unit power cell in a medium-voltage inverter in which
a plurality of unit power cells connected in series output a single phase voltage to a motor, the apparatus comprising:
a controller configured to generate a first voltage reference with respect to the plurality of unit power cells, and generate
a select signal for selecting a first unit power cell to be used for estimating capacitance of a DC link capacitor from among
the plurality of unit power cells; and

a driving unit configured to correct the first voltage reference by using a load current angle according to the select signal,
estimate capacitance of the DC link capacitor of the first unit power cell, generate a gating signal for generating a corrected
second voltage reference in consideration of the DC link voltage, and provide the generated gate signal to a second unit power
cell other than the first unit power cell among the plurality of unit power cells.

US Pat. No. 9,496,109

ELECTROMAGNETIC RELAY

LSIS CO., LTD., Anyang-s...

1. An electromagnetic relay, comprising:
a housing;
a fixed contact provided within the housing;
a movable contact disposed within the housing and configured to be movable between contacting the fixed contact and separated
from the fixed contact;

a driving unit configured to drive the movable contact, and including a shaft having one end connected to the movable contact
and a compression spring for applying an elastic force to the movable contact so as to be in contact with the fixed contact;
and

an arc protector including an arc shielding portion for shielding an arc, and a compression spring support portion formed
to protrude from the arc shielding portion to support the compression spring, the compression spring support portion comprising
a shaft accommodating portion for accommodating the shaft therein,

wherein the compression spring support portion includes a plurality of protrusions protruding toward the compression spring,
and

wherein each of the protrusions is configured such that its outer width is gradually decreased toward the compression spring.

US Pat. No. 9,448,265

APPARATUS AND METHOD FOR DETECTING OUTPUT PHASE DEFICIENCY IN INVERTER

LSIS CO., LTD., Anyang-s...

1. A method for detecting phase deficiency of output current in an inverter that includes a plurality of switching elements,
the method comprising:
receiving output current from a leg-shunt resistor in the inverter;
detecting a sector based on a switching operation status of one of the plurality of switching elements;
deciding whether detection of the output current is possible in the detected sector;
maintaining a phase deficiency count when detection of the output current is not possible in the detected sector;
incrementing the phase deficiency count when detection of the output current is possible in the detected sector and the output
current is within a phase deficiency band; and

determining the phase deficiency when the phase deficiency count is greater than a phase deficiency detection level.

US Pat. No. 9,248,754

ADD-ON COMMUNICATION APPARATUS ATTACHED TO CABLE INSTALLMENT TYPE CHARGING CONTROL DEVICE

LSIS Co., Ltd., Anyang-S...

1. An add-on communication device attached to a cable installment type charging control device attached to an electric vehicle
charging cable assembly, comprising:
a wireless communication unit wirelessly communicating with a terminal device;
an infrared light receiving diode receiving a first infrared light having a first digital pattern, and receiving a second
infrared light having a second digital pattern representing electric vehicle charging related information from the cable installment
type charging control device;

an attachment check unit checking whether the add-on communication device is attached to the cable installment type charging
control device on the basis of the first digital pattern and changing a state of the add-on communication device on the basis
of whether the add-on communication device is attached to the cable installment type charging control device; and

a control unit obtaining the electric vehicle charging related information from the second digital pattern, and transmitting
the electric vehicle charging related information to the terminal device through the wireless communication unit.

US Pat. No. 9,413,280

INVERTER AND METHOD OF CONTROLLING SAME

LSIS CO., LTD., Anyang-s...

1. An inverter comprising:
a current providing unit configured to provide a first axis current and a second axis current to an induction motor, wherein
the first axis current is a quadrate axis current and the second axis current is a direct axis current;

a revolutions per minute (RPM) measuring unit configured to measure a RPM of the induction motor; and
a control unit configured to:
change the quadrate axis current and the direct axis current according to the measured RPM to allow the induction motor to
have a maximum torque at the measured RPM if an acceleration of an electronic vehicle operates; and

fix the direct axis current and change the quadrate current if the acceleration of the electronic vehicle does not operate.

US Pat. No. 9,949,414

COOLING SYSTEM FOR TWO-DIMENSIONAL ARRAY POWER CONVERTERS

LSIS CO., LTD., Anyang-s...

1. A cooling system for two-dimensional array power converters comprising:a plurality of power converters arranged in two dimensions;
a compressor configured to generate compressed air;
vortex tubes each installed in the respective power converters, the vortex tubes configured to generate low-temperature air based on the compressed air from the compressor;
valves installed between the compressor and the vortex tubes;
a first temperature sensor installed adjacent to a case of each of the power converters to measure a temperature of the case;
a second temperature sensor installed adjacent to a semiconductor element for power conversion located in each of the power converters to measure a temperature of the semiconductor element; and
a controller configured to determine whether to supply the low-temperature air into the power converters by using the vortex tubes, based on the temperature measured by the temperature sensors, and to control the valves depending on a result of the determination.

US Pat. No. 9,054,600

CONTROL APPARATUS FOR REGENERATIVE MEDIUM VOLTAGE INVERTER

LSIS Co., Ltd., Anyang-S...

1. A control apparatus for regenerative medium voltage inverter, the apparatus comprising;
a converter unit configured to include a plurality of power devices, and convert a three-phase power to a DC voltage;
a gate signal generating unit configured to output a PWM signal which is a switching signal of the plurality of power devices;
current controller configured to generate a voltage command from a current command and a measured current and apply the voltage
command to the gate signal generating unit;

a generating unit configured to generate a voltage compensating a power difference between an input and an output of the converter
unit, and provide the voltage to the current controller;

a phase detecting unit configured to provide phase angle information of an input power; and
a first coordinate converting unit configured to convert the input power from a stationary reference frame to a synchronous
reference frame and provide the converted input power to the current controller.

US Pat. No. 9,936,600

MOTOR DRIVE UNIT

LSIS CO., LTD., Anyang-s...

1. A motor drive unit comprising:a base part;
a middle base part disposed above the base part;
a heat discharging part disposed between the base part and the middle base part, wherein an area in which the heat discharging part is installed is smaller than an area of a bottom of the middle base part;
a condenser unit disposed on a side of the heat discharging part and fixed to the middle base part;
a power PCB part disposed above the middle base part;
an EMC PCB part disposed above the power PCB part and spaced apart therefrom; and
a control PCB part coupled with a side portion of the power PCB part,
wherein an upper end of the heat discharging part is disposed under the middle base part to be coupled with the middle base part, and the area in which the heat discharging part is installed is smaller than an area of a top surface of the base part.

US Pat. No. 9,506,444

METHOD OF CONTROLLING ENGINE OF ISG VEHICLE

LSIS CO., LTD., Anyang-s...

1. A method of controlling an engine of an idle-stop and go (ISG) vehicle, the method comprising:
allowing, when an engine stop condition is satisfied, the engine to idle-stop;
maintaining, when an engine stop signal is transmitted from an outside, an idle-stop state of the engine although an engine
restarting condition is satisfied, and

restarting the engine when an engine restarting signal is transmitted from the outside,
restarting the engine, prior to the engine restarting signal being transmitted from the outside, when a power voltage of a
12V battery is less than a reference voltage, or when either a cooling water temperature or an engine oil temperature is higher
than a reference temperature.

US Pat. No. 9,312,764

APPARATUS AND METHOD FOR CONTROLLING BIDIRECTIONAL DC-DC CONVERTER

LSIS CO., LTD., Anyang-s...

1. A converter control apparatus comprising:
a converter comprising a first group of switches and a second group of switches that are located between an input unit and
an output unit, wherein the switches of the first group are in parallel and the switches of the second group are in parallel,
and wherein each switch of the first group of switches is in series with a corresponding switch of the second group of switches;

an inductor part connected to the input unit and located between the first group of switches and the second group of switches;
a switching control unit configured to:
check a voltage difference between voltage of the input unit and voltage of the output unit;
cause all switches of the first group of switches and all switches of the second group of switches to turn off according to
a buck mode when the voltage difference is positive (+);

cause all switches of the first group of switches to turn on, and cause all switches of the second group of switches to turn
off, according to a bypass mode when the voltage difference is zero; and

cause all switches of the first group of switches and all switches of the second group of switches to function according to
a boost mode when the voltage difference is negative (?).

US Pat. No. 9,493,078

CHARGER FOR ELECTRIC VEHICLE

LSIS CO., LTD, Anyang-si...

1. A charger for supplying a current from a commercial power source to a battery of an electric vehicle, the charger comprising:
a light emitting unit to display charging operation information of the charger;
a communication unit to perform optical communication with an external device; and
a control unit to control operations of the light emitting unit and the communication unit,
wherein the communication unit comprises a transmitter to transmit light and a receiver to receive light emitted from the
external device,

wherein the light emitting unit comprises:
a first light emitting diode and a second light emitting diode;
a first guide to guide the light emitted from the first light emitting diode and the light emitted from the transmitter; and
a second guide to guide the light emitted from the second light emitting diode and the light emitted from the external device
toward the receiver,

wherein the first guide and the second guide each comprises:
a first guiding part;
an extended part inclined and extending from the first guiding part; and
a second guiding part extending from the extended part such that it is parallel to the first guiding part,
wherein the transmitter and the receiver are disposed between the first light emitting diode and the second light emitting
diode, and

wherein a distance between the first guiding parts of the first guide and the second guide is shorter than a distance between
the second guiding parts of the first guide and the second guide.

US Pat. No. 9,312,727

LOCAL MONITORING APPARATUS, MONITORING SYSTEM AND METHOD OF DIGITAL PROTECTIVE RELAY

LSIS Co., Ltd., Anyang-S...

1. A power distribution monitoring system of a digital protective relay, the system comprising:
one or more digital protective relays provided with one or more remote monitoring ports connected via a remote monitoring
connection line, the one or more digital protective relays configured to collect data related to events and generate monitoring
data based on the events;

a local monitoring apparatus provided with a local monitoring program and connected to the one or more digital protective
relays via the remote monitoring connection line to receive the monitoring data using a local monitoring dedicated protocol;
and

a remote monitoring apparatus connected via the remote monitoring connection line to receive the monitoring data from the
one or more digital protective relays using a remote monitoring dedicated protocol, wherein

the one or more digital protective relays comprise:
a communication module configured to transmit the monitoring data and receive control data and
a control module configured to determine a communication protocol of the monitoring data, and process the control data using
the local monitoring dedicated protocol or the remote monitoring dedicated protocol according to a result of the determination.

US Pat. No. 9,293,275

MOLDED-CASE CIRCUIT BREAKER

LSIS Co., Ltd., Anyang-S...

1. A molded case circuit breaker comprising:
an upper external box defining a rear space;
a lower external box coupled with the upper external box and defining a front space divided from the rear space together with
the upper external box;

a fixed contact unit provided on one side of the front space and connected to electrically connected to one of a power supply
and a load;

a movable contact unit installed in the front space to be movable and being in contact with the fixed contact unit or being
separated from the fixed contact unit;

a switching device installed in the rear space and operating to allow the movable contact unit to be in contact with the fixed
contact unit or to be separated from the fixed contact unit;

an operation device installed in the front space and the rear space and transferring the movable contact unit according to
operation of the switching device; and

an electrode shaft installed on one side of the upper external box, corresponding to an outside of the front space,
wherein the operation device comprises:
a first link element comprising an upper link connected to the switching device and a lower link connected to the upper link;
a second link element installed to be pivotable around the electrode shaft, one side of the second link element being connected
to another side of the lower link to be pivotable; and

a third link element with one side connected to another side of the second link element to be pivotable and another side connected
to the movable contact unit to be pivotable,

wherein the upper external box is provided with a shaft mounting groove formed by denting a part of a top surface of the upper
external box downwards to allow the electrode shaft to be mounted thereon, and

wherein the upper external box is provided with a link penetration slot formed by cutting a part of the shaft mounting groove
to allow the second link element fixed to the electrode shaft to penetrate thereinto.

US Pat. No. 9,337,896

BLOCK FILTER FOR POWER LINE COMMUNICATION

LSIS CO., LTD., Anyang-s...

1. A blocking filter for power line communication (PLC), the filter comprising:
a low pass filter unit configured to include a capacitor and a plurality of inductors;
a plurality of magnetic saturation prevention circuits each connected to the inductor in parallel to prevent magnetic saturation
of the inductor, and configured to operate in response to an interruption control signal inputted from outside; and

a first switch connected or opened in response to the interruption control signal and interconnected between the low pass
filter unit and a neutral line,

wherein each of the magnetic saturation prevention circuits comprises:
a current transformer so installed as to wrap a periphery of the power line and to detect an input current proportionate to
a current flowing in the power line;

a low pass filter configured to filter a frequency signal higher than a predetermined signal in the input current;
a phase correction circuit configured to correct a phase difference of an output signal of the low pass filter;
an amplification circuit configured to amplify the output signal of the phase correction circuit and to provide the amplified
output signal to the inductors; and

a second switch connected or opened in response to the interruption control signal and interconnected between the low pass
filter and the phase correction circuit.

US Pat. No. 9,477,735

CLOUD COMPUTING-BASED DATA SHARING SYSTEM AND METHOD

LSIS CO., LTD., Anyang-s...

1. A cloud computing-based data sharing system, comprising:
a plurality of hardware industrial device management units connected to one or more hardware Programmable Logic Controllers
(PLC), wherein the plurality of industrial device management units are configured to share data including metadata to be used
by the one or more PLCs; and

a cloud server configured to:
receive a first subset of the data from one of the plurality of industrial device management units,
wherein the data comprises a plurality of types of data variably configurable to be synchronized,
wherein the first subset of the data corresponds to a first type of data configured to be synchronized and the data comprises
a second subset of data corresponding to a second type of data configured not to be synchronized, and

wherein the second type of data is configurable to be synchronized;
compare the first subset of the data with second data that is pre-stored at the cloud server; and
transmit a notification message to at least another of the plurality of industrial device management units indicating that
updating the second data is needed, wherein the notification message includes the first subset of the data;

wherein the at least another industrial device management unit is configured to update a local second data to the first subset
of the data in response to receiving the notification message; and

wherein the local second data comprising metadata includes a memory location corresponding to information accessible by an
operating program of each corresponding one the one or more PLCs, and the information comprises a state value of a sensor
generated by one of the one or more PLCs.

US Pat. No. 9,178,379

CHARGER FOR ELECTRIC VEHICLE

LSIS Co., Ltd., Anyang-S...

1. A charger to supply current from a commercial power source to a battery of an electric vehicle, the charger comprising:
a connector connected to the electric vehicle;
a plug connected to an outlet of the commercial power source to supply the current for charging the battery of the electric
vehicle;

a switching unit to selectively shut off the current supplied from the commercial power source to the electric vehicle according
to a temperature of the charger, wherein the switching unit including a first switching unit which is turned on or off when
a charging operation for the battery is started or completed, and a second switching unit which is turned on when the temperature
of the charger is less than a predetermined safety temperature and turned off when the temperature of the charger is equal
to or higher than the predetermine safety temperature;

a display unit to display information about an operation of the charger; and
a control unit to control the operation of the charger,
wherein the control unit turns off the first switching unit when information about completion of the charging operation for
the battery is transmitted thereto from the electric vehicle.

US Pat. No. 9,519,537

APPARATUS, SYSTEM AND METHOD FOR APPLICATION LOG DATA PROCESSING

LSIS CO., LTD., Anyang-s...

1. A log data processing system comprising:
a log data generation device configured to execute an application and generate log data corresponding to the executed application;
and

a log data processing server configured to generate and store a log data message based on the generated log data, the log
data processing server comprising:

a communication unit configured to receive log data information related to the generated log data from the log data generation
device;

a control unit comprising a log message generation unit configured to generate a log message based on the received log data
information; and

a storage unit configured to store the generated log message and generation history information of the generated log message,
wherein the log data information comprises a log message parameter, message code information, and identifier information of
the executed application, and

wherein the log message generation unit generates a level character string and level information of the log data based on
the message code information.

US Pat. No. 9,428,066

PORTABLE CHARGER AND METHOD OF OPERATING THE SAME

LSIS CO., LTD., Anyang-S...

1. A portable charger comprising:
a main body;
a first connector connected to the main body and a commercial power source; and
a second connector connected to the main body and an external apparatus,
wherein the main body comprises:
a power line formed between the first and second connectors to allow a commercial electric power to flow through the power
line;

a relay disposed on the power line to intermit the commercial electric power flowing through the power line;
a data communication unit connected to the power line to perform data communication with the external apparatus connected
to the second connector through the power line; and

a switch disposed between the power line and the data communication unit to intermit the connection between the data communication
unit and the power line,

wherein the power line comprises:
a first power line through which a positive first electric power flows; and
a second power line through which a negative second electric power flows,
the relay comprises:
a first relay intermitting only the first electric power which flows through the first power line; and
a second relay intermitting only the second electric power which flows through the second power line, and
the data communication unit comprises:
a first data communication unit performing data communication through the first power line; and
a second data communication unit performing data communication through the second power line,
wherein the switch comprises:
a first switch independently intermitting a connection between the first power line and the first data communication unit;
a second switch independently intermitting a connection between the second power line and the second data communication unit;
and

a third switch intermitting a driving electric power supplied to the second data communication unit.

US Pat. No. 9,431,200

ELECTROMAGNETIC RELAY

LSIS CO., LTD., Anyang-s...

1. An electromagnetic relay, comprising:
a housing;
a fixed contact provided within the housing;
a movable contact configured to be movable between contacting the fixed contact and separated from the fixed contact; and
a driving unit configured to drive the movable contact between contacting the fixed contact or separated from the fixed contact,
wherein the driving unit comprises:
a coil;
a yoke disposed within the coil and comprising an inner section for forming a magnetic path inside and outside of the coil;
a movable core disposed within the coil to be attractable by the inner section;
a shaft comprising:
a shaft body; and
one end connected to the movable core and another end connected to the movable contact, wherein a coupling portion is provided
at the one end and coupled with the movable core; and

a fixing member configured to be coupled to an end of the coupling portion which is exposed outside of the movable core, wherein
the fixing member is configured to restrict separation of the coupling portion from the movable core,

wherein:
a hook is provided at the end of the coupling portion,
a hook locking jaw is provided at the fixing member and configured to be engaged with the hook in an axial direction, and
the coupling portion comprises:
a first diameter section extending from an end of the shaft body;
a second diameter section formed adjacent to the first diameter section and having a smaller diameter than the first diameter
section; and

a hook locking jaw accommodating portion adjacent to the second diameter section and configured to accommodate the hook locking
jaw.

US Pat. No. 9,452,455

CLEANING DEVICE FOR CONTAMINATION OF CONTACT OF ELECTROMAGNETIC CONTACTOR

LSIS CO., LTD., Anyang-s...

1. A device for cleaning contaminants on a contact portion of an electromagnetic contactor, the device comprising:
a housing;
a drive unit provided within the housing to generate a driving force;
a rotating plate rotatably provided within the housing to be rotated by receiving the driving force; and
a N-pole magnetic body adhered to one end of the rotating plate and a S-pole magnetic body adhered to the other end of the
rotating plate to generate a magnetic field between the one end of the rotating plate and the other end of the rotating plate,
wherein the N-pole magnetic body is separated by a distance from the S-pole magnetic body,

wherein a drive motor is provided in the drive unit.

US Pat. No. 9,330,873

ELECTROMAGNETIC SWITCHING DEVICE

LSIS CO., LTD., Anyang-s...

1. An electromagnetic switching device comprising:
a housing;
a fixed contact point inside the housing;
a movable contact including a movable contact point positioned under the fixed contact point to repeatedly contact with the
fixed contact point and separate from the fixed contact point;

a shaft comprising a return spring receiving part coupled to the movable contact, a wipe spring receiving part coupled beneath
the movable contact, and a pressing surface directed downward and located below the wipe spring receiving part;

a return spring mounted in the return spring receiving part to continuously press the shaft downward;
a wipe spring mounted in the wipe spring receiving part to continuously press the movable contact point upward;
a fixed core inside the housing, the fixed core including a hollow region receiving the wipe spring receiving part and the
pressing surface;

a movable core located such that a top end of the movable core contacts the pressing surface, the movable core movable up
and down according to a mutual electromagnetic force of the fixed core and the movable core; and

an elastic member coupled with a lower portion of the shaft, an upper portion of the elastic member at least partially inserted
into the movable core and a bottom surface of the elastic member asymmetrically formed,

wherein the shaft comprises an open top end such that a hollow region is formed within the shaft to a predetermined depth;
wherein the wipe spring receiving part is located in the hollow region of the shaft such that the wipe spring extends into
the hollow region of the shaft,

wherein the movable core presses the pressing surface upward when the movable core and the shaft move upward, and
wherein the pressing surface presses the movable core downward when the movable core and the shaft move downward.

US Pat. No. 9,293,287

OVERCURRENT RELAY AND MOLDED CASE CIRCUIT BREAKER WITH THE SAME

LSIS Co., Ltd., Anyang-S...

1. An overcurrent relay comprising:
a case cover including a plurality of stop protrusions on an inner surface thereof and coupled to the case body;
an electronic circuit board installed within the case body; and
a plurality of setting knobs rotatably installed on the electronic circuit board, having a stoppage protrusion on a rotary
plate, operated within a predetermined rotation range upon being caught by the stoppage protrusion, and setting a trip operation
time with respect to a fault current,

wherein one of the setting knobs is a dedicated knob configure to prevent a long-time limit trip OFF function, and
wherein the dedicated knob includes a stoppage protrusion extending to be longer than the stoppage protrusion of the other
setting knobs in a circumferential direction so as to have a rotation angle range narrower than those of other setting knobs.

US Pat. No. 9,158,529

METHOD FOR MAINTAINING FIRMWARE OF DIGITAL PROTECTIVE RELAY AND DIGITAL PROTECTIVE RELAY PERFORMING THE SAME

LSIS Co., Ltd., Anyang-S...

1. A firmware updating method for a digital protective relay having a plurality of modules each comprising a central processing
unit (CPU), at least one memory and at least one communication channel, the method comprising:
determining whether a master device has been connected with a main processing module of the plurality of modules;
receiving firmware update related information from the master device upon determining that the master device has been connected;
recognizing a target module of the plurality of modules that has firmware to be updated based on the received firmware update
related information;

notifying necessity of a firmware update to the recognized target module;
receiving a firmware update ready message from the recognized target module;
downloading the firmware from the master device into the recognized target module after receiving the firmware update ready
message; and

installing the downloaded firmware,
wherein the digital protective relay and the master device are connected to each other via a wireless interface, and
wherein each of the other of the plurality of modules may be connected to the master device via the main processing module,
and

wherein downloading and installing the firmware are simultaneously performed when a plurality of target modules are present.

US Pat. No. 9,065,258

SWITCH FOR SOLID INSULATED SWITCHGEAR

LSIS Co., Ltd., Anyang-S...

1. A switch for a solid insulated switchgear having a common actuator that provides a driving force for switching a circuit,
the switch comprising:
an enclosure that is solid insulated and includes an electric power source side bushing portion for burying an electric power
source side connection conductor, an electric load side bushing portion for burying an electric load side connection conductor,
and an accommodation body portion having air filled therein;

a main circuit switch installed, for each pole, at the enclosure, connected to the common actuator and the electric power
source side connection conductor, and having a vacuum interrupter that switches an electric power circuit between an electric
power source and an electric load, by receiving a switching driving force from the common actuator; and

an earth switch installed, for each pole, in the accommodation body portion of the enclosure so as to be air-insulated, and
the earth switch including a first fixed contactor to be earthed; a second fixed contactor electrically connected to the electric
power source side connection conductor; and a movable blade connected to the common actuator, and movable to a first position
for contacting the first fixed contactor and to a second position for contacting the second fixed contactor, by a switching
driving force from the common actuator.

US Pat. No. 10,030,632

CONTROL DEVICE FOR VOLTAGE SOURCE CONVERTER AND OPERATING METHOD THEREOF

LSIS CO., LTD., Anyang-s...

1. A control device to communicate with a remote control for a voltage source converter connected to a wind farm connected to a whole grid, wherein the wind farm includes a plurality of wind power induction generators that generate power that is generated as a function of torque of each of the induction generators, and frequency and level of alternating current (AC) voltage received at each of the induction generators, the control device comprising:a power source monitor unit sensing a direct current (DC) voltage of the whole grid connected to the voltage source converter; and
a control unit configured to:
compare the sensed DC voltage of the whole grid with a reference voltage when a control signal of the remote control is not transmitted to the control device due to communication failure or error between the remote control and the control device, and
adjust the frequency and the level of the AC voltage supplied to each of the induction generators of the wind farm to a relatively lower frequency and level of AC voltage to cause a corresponding decrease in the power generated by the wind farm, when the sensed DC voltage of the whole grid is outside of a preset range of reference voltages.

US Pat. No. 9,594,360

MOTOR STARTER WITH COMMUNICATION MODULE RESPONSIVE TO MAGNETIC CONTACTOR STATUS

LSIS CO., LTD., Anyang (...

1. A communication module of a motor starter, the motor starter comprising a manual motor starter (MMS) and a magnetic contactor
(MC), the communication module comprising:
an MMS status input unit connected to an MMS status contact of the MMS and configured to receive status information of the
MMS;

an MC status input unit configured to receive status information of the MC;
a communication unit connected to a monitoring control console via a communication cable and configured to communicate data
with the monitoring control console;

a switch configured to set a communication speed of the communication unit; and
a controller configured to:
transmit the received status information of the MMS and the received status information of the MC to the monitoring control
console;

determine whether to move the MC in response to a command signal received from the monitoring control console based on the
received status information of the MC;

transmit a control complete message to the monitoring control console via the communication unit while controlling the MC
to operate normally in an on state upon receiving a command signal from the monitoring control console for controlling the
MC to be turned on when the received status information of the MMS indicates an on state and the received status information
of the MC indicates an off state; and

transmit a command error generation message to the monitoring control console via the communication unit without controlling
the MC upon receiving a command signal from the monitoring control console for controlling the MC to be turned on when the
received status information of the MMS indicates an off state and the received status information of the MC indicates an on
state.

US Pat. No. 9,509,206

POWER FACTOR CORRECTOR CORRECTING A POWER FACTOR OF AN ALTERNATING CURRENT (AC) VOLTAGE

LSIS CO., LTD., Anyang-s...

1. A power factor corrector correcting a power factor of an alternating current (AC) voltage, the power factor corrector comprising:
a power factor correcting unit correcting a power factor of an AC voltage; and
a smoothing unit smoothing a power factor corrected voltage, wherein the smoothing unit comprises a film condenser and a plurality
of electrolytic condensers,

wherein the plurality of electrolytic condensers have a same capacitance,
wherein the plurality of electrolytic condensers are parallel-connected,
wherein the plurality of electrolytic condensers have a limit ripple current that is determined based on a number of the plurality
of electrolytic condensers.

US Pat. No. 9,499,055

INVERTER FOR ELECTRIC VEHICLE

LSIS CO., LTD., Anyang-s...

1. An inverter for an electric vehicle, which controls an RPM of a motor for the electric vehicle, the inverter comprising:
a busbar connected to a power semiconductor module for supplying current;
a current sensor measuring the current passing through the busbar; and
a control board on which the current sensor is mounted, the control board controlling the motor for the electric vehicle according
to a result measured by the current sensor,

wherein the busbar is disposed to vertically pass through the current sensor and control board, and is disposed on an upper
portion of the power semiconductor module to overlap the power semiconductor module when viewed from above,

wherein the current sensor include a through hole through which the busbar vertically passes, a facing surface facing a lower
surface of the control board, signal terminals protruding upward from the facing surface in a row, and fixing terminals protruding
upward from a circumference of the facing surface at regular intervals and have a thickness greater than that of the signal
terminals,

wherein the current sensor is directly coupled to the lower surface of the control board by soldering of the signal terminals
and the fixing terminals to the control board.

US Pat. No. 9,454,502

PARALLEL COMMUNICATION DEVICE AND COMMUNICATION METHOD THEREOF

LSIS CO., LTD., Anyang-s...

1. A parallel communication device comprising:
a first receiving terminal configured to receive communication data transmitted by a master device;
a first transmitting terminal configured to transmit the communication data to a first slave device of a plurality of slave
devices;

a first switch configured to manage a first communication line disposed between the first transmitting terminal and the first
slave device; and

a control unit configured to:
confirm the first slave device based on destination information in the communication data, wherein the destination information
comprises prefix information virtually assigned to the first slave device according to a protocol between the master device
and the communication device to determine a destination for transmitting the communication data;

delete the destination information from the communication data and cause the first transmitting terminal to transmit the communication
data with the destination information deleted when the first slave device is confirmed;

insert transmitter information into response data received from the first slave device, wherein the transmitter information
corresponds to the first slave device that transmitted the response data and comprises prefix information virtually assigned
to the first slave device according to a protocol between the master device and the communication device to determine a transmitter
of the response data; and

cause transmission of the response data with the inserted transmitter information to the master device.

US Pat. No. 9,431,194

SUPPORTING STRUCTURE OF CLOSING RESISTOR FOR HIGH VOLTAGE CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A supporting structure of a closing resistor for a high voltage circuit breaker, the structure comprising:
a fixed part main circuit conductor;
a supporting conductor installed on an upper surface of the fixed part main circuit conductor;
a connecting conductor connected to one end of the supporting conductor;
a closing resistor unit coupled to one side of the fixed part main circuit conductor; and
a coupling conductor provided to couple the supporting conductor and the closing resistor unit to each other,
wherein the supporting conductor and the connecting conductor are provided with a coupling rib and a coupling groove, respectively,
to be coupled to each other in an inserting manner.

US Pat. No. 9,425,590

WITHDRAWABLE-TYPE CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A withdrawable-type circuit breaker, comprising:
a cradle;
a main body connecting a main circuit when inserted into the cradle by a transfer device or disconnecting a connected state
of the main circuit when withdrawn from the cradle; and

an interlock device restricting withdrawal of the main body when the circuit breaker is in a connected state, the interlock
device including:

a support part vertically disposed on a bottom surface of the main body;
an interlock lever having a sliding hole at one end and a power transmission part at another end, a middle portion of the
interlock lever hinge-coupled to one end of the support part and two ends the interlock lever are rotatable; and

an interlock pin movable up and down, the interlock pin having one end portion inserted into and slidably coupled to the sliding
hole and another end portion insertably coupled to an interlock pin hole formed on a bottom surface of the cradle,

wherein the support part includes:
a pair of support plates each having one end connected to an intermediate portion of the interlock lever by a hinge shaft
and another end coupled to a bottom surface of the main body, the pair of support plates spaced from each other; and

a connection member installed between the pair of support plates, the connection member connecting the pair of the support
plates to each other.

US Pat. No. 9,340,123

POWER SUPPLY SYSTEM FOR ELECTRIC VEHICLE AND CONTROL METHOD THEREOF

LSIS CO., LTD., Anyang-s...

1. A power supply system for electric vehicle (EV), the system including a high voltage battery generating a driving voltage
to a motor of the EV, and a low voltage battery generating a driving voltage for other electronic equipment, the system comprising:
a low voltage DC-DC converter (LDC) configured to convert a high voltage from the high voltage battery to a first voltage
for the low voltage battery;

an alternator configured to generate an AC voltage using a rotary power of the motor;
a rectifier configured to rectify the AC voltage from the alternator to generate a second voltage, the second voltage including
a DC voltage;

a comparator to compare the second voltage with a reference voltage; and
a selector configured to supply the second voltage from the rectifier to the low voltage battery when the second voltage is
greater than the reference voltage and supply the first voltage from the LDC to the low voltage battery when the second voltage
is less than the reference voltage.

US Pat. No. 9,324,492

MAGNETIC DEVICE

LSIS CO., LTD., Anyang-s...

1. A magnetic device comprising:
a bobbin including a hollow portion extending in a longitudinal direction;
coils wound around the outside of the bobbin;
a core coupled to the bobbin outside the bobbin;
wherein the bobbin comprises:
a first winding portion having a top side and a bottom side and around which the coils are wound, wherein the first winding
portion is shaped to define one portion of the hollow portion of the bobbin;

a second winding portion having a top side and a bottom side and around which the coils are wound, wherein the second winding
portion is shaped to define a second portion of the hollow portion of the bobbin;

a single tolerance relief part positioned between the first winding portion and the second winding portion, wherein the tolerance
relief part defines a continuous circumferential curved shape having a radius and protrudes in the width direction that is
perpendicular to the longitudinal direction, wherein a top side of the tolerance relief part is attached to the bottom side
of the first winding portion and a bottom side of the tolerance relief part is attached to the top side of the second winding
portion, and wherein the tolerance relief part is formed of a type of material different from a type of material of the first
and second winding portions;

coupling parts symmetrically disposed to each other on the outsides of the first and second winding portions, respectively;
wherein the tolerance relief part is elastically deformable in the longitudinal direction.

US Pat. No. 9,243,982

MEASURING APPARATUS AND MEASURING METHOD OF TRAIN WHEEL WEAR

LSIS Co., Ltd., Anyang-S...

1. A measuring apparatus of train wheel wear, the apparatus comprising:
a speed measuring unit configured to measure a revolution of a train wheel and a speed of a train using a tachometer;
a position measuring unit configured to measure a position of the train by receiving a position signal from a balise, wherein
the position of the train is information on an absolute running distance of a running train;

a calculation unit configured to calculate abrasiveness of the train wheel by calculating a size of the train wheel using
the measured revolution of the train wheel, and the speed and the position of the train;

a storage configured to store the calculated abrasiveness of the train wheel calculated by the calculation unit; and
a display unit configured to display the calculated abrasiveness of the train wheel calculated by the calculation unit,
wherein the storage stores a reference abrasiveness for warning a user that the calculated wheel size or the calculated abrasiveness
of the train wheel is smaller than a reference size or is smaller than a reference abrasiveness, if the calculated wheel size
or the calculated abrasiveness of the train wheel is smaller than the reference size or the reference abrasiveness, and

wherein the display unit displays that the abrasiveness of the train wheel is smaller than the reference abrasiveness, if
the calculated abrasiveness of the train wheel is smaller than the reference abrasiveness.

US Pat. No. 9,136,069

MOVER ASSEMBLY OF CIRCUIT BREAKER

LSIS Co., Ltd., Anyang-S...

1. A mover assembly of a circuit breaker, the mover assembly comprising:
a terminal fixed within the circuit breaker;
a connector coupled to the terminal and having a plurality of accommodation portions;
at least one mover rotatably installed in each of the plurality of accommodation portions, each of the at least one mover
including a first mover and a second mover;

a movable contactor installed at one end portion of the first mover and second mover of each of the at least one mover such
that the corresponding first mover and second mover rotate together; and

an elastic member positioned between the first mover and the second mover of each of the at least one mover,
wherein the first mover of each of the at least one mover is formed symmetrically with the corresponding second mover and
has a side portion fully adhered to the corresponding second mover,

wherein the elastic member provides elastic force to the corresponding first mover and second mover to tightly attach the
first mover and second mover to adjacent sides of the corresponding accommodation portion.

US Pat. No. 9,112,500

METHOD OF OUTPUTTING POSITIONING PULSE BY PLC

LSIS Co., Ltd., Anyang-S...

1. A method of outputting a positioning pulse by a programmable logic controller (PLC), the method comprising:
setting up the desired cycle of a pulse to be output;
determining a number of needed clocks based on a number of system clocks and a desired frequency according to the desired
cycle;

determining a total number of needed clocks based on the number of needed clocks and the desired frequency;
determining a clock difference based on the number of system clocks and the total number of needed clocks;
determining a first number of setup clocks corresponding to a first output pulse in a certain cycle;
determining a second number of setup clocks corresponding to pulses except for the first output pulse; and
outputting a pulse based on the first number of setup clocks and the second number of setup clocks.

US Pat. No. 9,093,892

APPARATUS AND METHOD FOR CONTROLLING MEDIUM VOLTAGE INVERTER

LSIS Co., Ltd., Anyang-S...

1. An apparatus for controlling an inverter, the apparatus comprising:
a detector configured to detect whether power to the inverter fails or the power to the inverter is recovered; and
a controller configured to:
maintain an output frequency of the inverter at a frequency at a time of the power failure;
decrease an output voltage of the inverter according to time while maintaining the output frequency, the voltage decrease
being constant;

control the inverter according to an operation status of the inverter at the time of the power failure when the detector detects
the power recovery prior to lapse of a predetermined period, the operation status a fixed speed operation, an acceleration
operation or a deceleration operation;

increase the output voltage according to time while maintaining the output frequency when the operation status prior to the
power failure is the acceleration operation; and

increase the output voltage to a target voltage and increase the output frequency to a target frequency, the target voltage
being a voltage of the inverter at the time of the power failure.

US Pat. No. 9,052,364

APPARATUS FOR DIAGNOSING RELAY CONTACT OF ELECTRIC VEHICLE AND METHOD THEREOF

LSIS Co., Ltd., Anyang-S...

9. An apparatus for diagnosing a relay contact of an electric vehicle, the apparatus comprising:
a high-voltage battery serving as a main power source;
an inverter receiving a DC (direct current) electrical power from the high-voltage battery and driving a motor by changing
a phase of the DC electrical power; and

a high-voltage relay between the high-voltage battery and the inverter, the high-voltage relay intermitting the DC electrical
power output through the high-voltage battery,

wherein the inverter determines whether the high-voltage relay is malfunctioned based on a time point at which a DC link voltage
value according to the supplying of the DC electrical power is equal to or greater than a voltage value of the high-voltage
battery and intermits a power input to the motor according to a diagnosis result.

US Pat. No. 9,654,018

DEVIATION COMPENSATION METHOD OF POTENTIAL TRANSFORMER

LSIS CO., LTD., Anyang-s...

1. A deviation compensation method for a potential transformer, the method comprising:
detecting an output voltage value of a first potential transformer;
determining a compensation value applied to the first potential transformer;
compensating the output voltage value based on the compensation value in order to measure an actual voltage value for a location
at which the first potential transformer is installed;

verifying validity of the measured actual voltage value; and
resetting a deviation compensator by measuring the actual voltage value according to the verified validity,
wherein verifying the validity comprises:
calculating a difference between a previously measured actual voltage value the location at which the first potential transformer
is installed and a currently measured actual voltage value for the location at which the first potential transformer is installed;

determining whether the calculated difference exceeds a preset reference range;
determining that the currently measured actual voltage value is valid when the difference is within the reference range;
determining that the currently measured actual voltage value has an error when the difference exceeds the reference range.

US Pat. No. 9,603,014

POWER SYSTEM

LSIS CO., LTD., Anyang-s...

1. A power system comprising:
a power device group comprising a power device;
at least two communication devices connected to the power device group via a short range communication network; and
a monitoring/controlling device connected to the at least two communication devices via a wired connection and transmitting
and receiving state information data and control data of the power device via the at least two communication devices,

wherein the at least two communication devices each comprise:
a first communication unit connecting the at least two communication devices via the short range communication network; and
a second communication unit connected to the monitoring/controlling device via a wired connection,
wherein the monitoring/controlling device comprises:
a communication unit connected to each of the at least two communication devices:
a storage unit storing information related to each of the at least two communication devices and a recovery command message
according to a state of each of the at least two communication devices; and

a controller checking the state of each of the at least two communication devices and outputting the recovery command message
to the corresponding communication device when the corresponding communication device is in an abnormal state, and

wherein the corresponding communication device that is in the abnormal state receives the recovery command message and forcibly
terminates and reboots itself based on the recovery command message.

US Pat. No. 9,500,696

TEST CIRCUIT FOR THYRISTOR VALVE IN HVDC SYSTEM

LSIS CO., LTD., Anyang-s...

1. A synthetic test circuit for synthetic-testing a thyristor valve in high voltage direct current (HVDC), the synthetic test
circuit comprising:
a resonant circuit comprising the thyristor valve, a first auxiliary valve connected in series to the thyristor valve, and
a charging auxiliary valve connected in parallel to the thyristor valve and applying forward DC current, a reverse DC voltage,
and a forward DC voltage to the thyristor valve;

a current generation unit connected to the charging auxiliary valve of the resonant circuit and generating DC current that
is above a reference current value to supply the generated DC current to the resonant circuit; and

a voltage generation unit connected to the charging auxiliary valve of the resonant circuit and generating a DC voltage that
is above a reference voltage value to supply the generated DC voltage to the resonant circuit, the DC voltage becoming the
forward DC voltage or the reverse DC voltage according to a polarity of the thyristor valve,

wherein the charging auxiliary valve is used for charging a gate driver of the thyristor valve.

US Pat. No. 9,488,972

APPARATUS AND METHOD FOR CONTROLLING PROGRAMMABLE LOGIC CONTROLLER

LSIS CO., LTD., Anyang-s...

1. A method of controlling a PLC digital output signal of a PLC apparatus, the method comprising:
receiving the PLC digital output signal; and
interpolating a gradient of the PLC digital output signal by applying a nonlinear correction function to the received PLC
digital output signal to produce an interpolated PLC digital output signal that is proportionate to a target value and inversely
proportionate to a frequency of the interpolating, and

wherein the interpolated PLC digital output signal has an increasingly smoother gradient as the frequency of the interpolating
is increased transmitting the interpolated PLC digital output signal to control an external device so that the external device
can be prevented from being malfunctioned or broken.

US Pat. No. 9,449,486

SOLITARY SENIOR PEOPLE CARE SYSTEM

LSIS CO., LTD., Anyang-s...

1. A solitary senior people care system comprising:
an electric device switch installed within a household where a solitary senior resident resides;
a household monitoring communication device having a communication unit, connected to the electric device switch through a
power line, configured to monitor on or off state information of the electric device switch, and configured to provide the
on or off state information and identity information of the electric device switch together;

an electric device switch history server computer connected to the household monitoring communication device through a communication
network, and that stores and provides a solitary senior resident household electric device switch usage history information
including information regarding a date and time at which the electric device switch was finally in an on state and information
regarding a date and time at which the electric device switch was finally in an off state, electric device switch setting
information including reference information for determining occurrence of an emergency situation, and electric device switching
state information including at least any one of electric device switch on or off state information of a solitary senior resident
house, identity information of the electric device switch, identity information of the solitary senior resident household,
and state value information indicating whether an emergency situation has occurred determined based on information regarding
a time lapsed after an final operation of the electric device switch and the electric device switch setting information; and

a care device connected to the electric device switch history server computer, and configured to notify an emergency rescue
center or a guardian contact number about occurrence of an emergency situation when an emergency situation occurs according
to at least any one of the electric device switch state information, the solitary senior resident household electric device
switch usage history information, and the state value information indicating whether an emergency situation has occurred,
from the electric device switch history server computer.

US Pat. No. 9,070,277

METER CAPABLE OF HAVING COMMUNICATION SECURITY AND DATA TRANSMITTING/RECEIVING SYSTEM USING THE SAME

LSIS Co., Ltd., Anyang-S...

1. A data transmitting/receiving system comprising a meter and a server, wherein:
the server is configured to:
generate a public key and a private key corresponding to the public key; and
transmit a message requesting a data frame and the public key at a same time to the meter; and
the meter comprises:
a communication unit receiving the public key from the server,
a frame generating unit encoding the data frame using the public key, and
a controller configured to:
cause the communication unit to transmit the encoded data frame; and
cause the frame generating unit to generate the data frame using the public key in response to receiving the message and the
public key from the server.

US Pat. No. 9,071,086

INVERTER, INVERTER COMMUNICATION SYSTEM, COMMUNICATION METHOD THEREOF

LSIS Co., Ltd., Anyang-S...

1. An inverter communication system comprising:
a plurality of inverters connected to each other through a communication line, and assigned with different original identifiers
for mutual distinction,

wherein each of the plurality of inverters is configured to:
generate a data frame to be transmitted when data to be transmitted to a specific inverter occur;
transmit the generated data frame to a subsequent inverter;
determine whether a data frame is received via a first adjacent inverter,
wherein the received data frame comprises destination information including an original identifier of an inverter where the
data frame arrives finally and departure information including an original identifier of an inverter that generates and transmits
the data frame initially;

confirm the destination information included in the received data frame when the data frame is received;
determine whether the confirmed destination information is identical to its own original identifier;
drive a motor using data in the received data frame when the confirmed destination information is identical to its own original
identifier;

confirm the departure information included in the received data frame when the confirmed destination information is not identical
to its own original identifier;

determine whether the confirmed departure information is identical to its own original identifier;
delete the received data frame when the confirmed departure information is identical to its own original identifier; and
transmit the received data frame to a second adjacent inverter when the confirmed departure information is not identical to
its own original identifier.

US Pat. No. 9,488,973

PROGRAMMABLE LOGIC CONTROLLER DEVICE AND METHOD FOR CONTROLLING THE SAME

LSIS CO., LTD., Anyang-s...

1. A method for controlling a Programmable Logic Controller (PLC), the method comprising:
receiving input data from an external source;
temporarily storing the received input data at an input address internal to a data input unit and not corresponding to a memory
of the PLC;

directly reading the stored input data from the input address via a control command comprising the input address internal
to the data input unit;

temporarily storing output data that is a result of a first calculation operation on the read input data via a control command
comprising an output address internal to a data output unit, wherein the output data is temporarily stored at the output address
internal to the data output unit and not corresponding to a memory of the PLC; and

transmitting the output data to an output circuit when the output data is temporarily stored at the output address after the
first calculation operation,

wherein temporality storing the output data comprises:
temporarily storing an output result of a second calculation operation of a plurality of calculation operations when the plurality
of calculation operations are included in a PLC sequence command, and

temporarily storing another output result of a calculation operation on changed input data when the read input data is changed
during a calculation operation.

US Pat. No. 9,413,265

DRIVING DEVICE OF SYNCHRONOUS RECTIFICATION APPARATUS

LSIS CO., LTD., Anyang-s...

1. A driving device of a synchronous rectification apparatus, the driving device comprising:
a protection part connected to a reference voltage terminal, and outputting an initial operation value for operating the synchronous
rectification apparatus based on a reference voltage input from the reference voltage terminal;

a comparison part receiving the initial operation value through the adjustment part into a positive terminal and a synchronous
rectification starting value into a negative terminal, the comparison part outputting a command value of the synchronous rectification
apparatus, which is obtained by comparing the initial operation value with the synchronous rectification starting value;

a voltage detection part disposed on a power input terminal to detect a voltage value of a power input through the power input
terminal; and

an adjustment part having a switching element, receiving the voltage value detected from the voltage detection part through
the switching element and adjusting the reference voltage based on the voltage value,

wherein the initial operation value is changed according to the reference voltage adjusted through adjusting part.

US Pat. No. 9,235,405

APPARATUS, SYSTEM AND METHOD FOR UPGRADING FIRMWARE OF ENERGY METERING DEVICE

LSIS Co., Ltd., Anyang-S...

1. An apparatus configured to upgrade firmware of an energy metering device in a system including a server, the apparatus
comprising:
a communication unit configured to communicate with the server over a network, using firmware upgrade information including
a plurality of object oriented data models,

wherein each of the plurality of object oriented data models are classified by a corresponding logical identifier which is
determined by a function according to the upgrade firmware to be implemented by the energy metering device such that the plurality
of object oriented data models, which are associated with the same function according to the upgrade firmware, have the same
logical identifier,

at least one storage unit; and
a controller configured to:
receive a first object oriented data model, a first object of the first object oriented data model representing asking the
size of firmware segment the energy metering device is able to receive at a time from the server and a second object of the
first object oriented data model representing the logical identifier,

send a second object oriented data model, a first object of the second object oriented data model representing the asked size
of the firmware segment and the second object of the second object oriented data model representing the logical identifier,

receive at least one firmware segment to the energy metering device based on the asked size of the firmware segment,
receive a third object oriented data model, a first object of the third object oriented data model representing the server's
order to start firmware upgrade and a second object of the third object oriented data model representing the logical identifier,

send a fourth object oriented data model, a first object of the fourth object oriented data model representing a status of
starting the firmware upgrade in response to the received server's order and a second object of the fourth object oriented
data model representing the logical identifier,

send a fifth object oriented data model, a first object of the fifth object oriented data model representing a status of the
firmware upgrade in progress, a second object and a second date item of the fifth object oriented data model representing
the logical identifier,

send a sixth object oriented data model, a first object of the sixth object oriented data model indicating completion of the
firmware upgrade and a second object of the sixth object oriented data model representing the logical identifier, and

operate the upgraded firmware when the server transmits a seventh object oriented model, a first object of the seventh object
oriented data model representing the server's order to activate the upgraded firmware and a second object of the seventh object
oriented data model representing the logical identifier.

US Pat. No. 9,177,743

ELECTROMAGNETIC SWITCHING DEVICE

LSIS Co., Ltd., Anyang-S...

1. An electromagnetic switching device, comprising:
a case defining an outer appearance of the electromagnetic switching device;
a fixed contact point assembly detachably inserted into the case and including a fixed contact point;
a coil terminal assembly detachably coupled to one side of the fixed contact point assembly and including a coil assembly
and a frame, the coil assembly including a coil and an internal yoke that are received in the frame; and

a shaft assembly detachably inserted into the coil terminal assembly, wherein the shaft assembly includes:
a shaft formed with an opening and movable in the coil terminal assembly;
a movable core connected to a lower side of the shaft;
an elastic member received in the shaft; and
a movable contact point assembly connected to the shaft, wherein the movable contact point assembly includes:
a movable contact point selectively contacting the fixed contact point; and
a contact point support part inserted into the opening and fixed to one side of the shaft, the contact point support part
supporting the movable contact point,

wherein the internal yoke includes a first internal yoke spaced apart from a second internal yoke,
wherein the first internal yoke is inserted into the frame from an upper portion of the frame and the second internal yoke
is inserted into the frame from a lower portion of the frame,

wherein the frame includes a protrusion formed at an interface between the first and second internal yokes and configured
to fix positions of the first and second internal yokes, and

wherein the fixed contact point assembly further includes a groove and the coil terminal assembly further includes a protrusion
that is detachably coupled to the groove and the shaft assembly is detachably coupled to the coil terminal assembly such that
each of the contact point assembly, the coil terminal assembly and the shaft assembly are separately detachable.

US Pat. No. 9,961,801

FAN ASSEMBLY AND ELECTRIC POWER EQUIPMENT HAVING THE SAME

LSIS CO., LTD., Anyang-s...

10. An electric power apparatus comprising:a case having a space formed therein;
a plurality of modules arranged in the space; and
a fan assembly disposed in the space to be located over the plurality of modules, the fan assembly allowing air to flow into the plurality of modules,
wherein the fan assembly includes:
a first guide mounted in the case, the first guide being disposed in a vertical direction;
a second guide disposed in a direction vertical to the first guide, the second guide disposed in a horizontal direction;
a slider disposed to move in the horizontal direction along the second guide; and
a plurality of fan modules fastened to the slider,
wherein the plurality of fan modules correspond one by one to the plurality of modules,
wherein each of the plurality of fan modules is fastened to the slider such that the height of each of the plurality of fan modules is adjustable,
wherein each of the plurality of fan modules includes:
a plurality of fans blowing air in an upper direction; and
a fan mounter to which the plurality of fans are mounted,
wherein the fan mounter includes a variable fastening plate fastened to the slider such that the height of the variable fastening plate is adjustable,
wherein the slider includes:
a front body to which the variable fastening plate is fastened such that the height of the variable fastening plate is adjustable;
a side body disposed at the rear of the front body; and
a roller rotatably installed at the side body to roll along the second guide.

US Pat. No. 9,812,940

OFFSET VOLTAGE GENERATOR AND METHOD FOR GENERATING AN OFFSET VOLTAGE OF THREE-PHASE INVERTER

LSIS CO., LTD., Gyeonggi...

1. An offset voltage generator in a three-phase inverter, the three-phase inverter operating in a continuous modulation mode
or a discontinuous modulation mode, the offset voltage generator comprising:
a first limiter configured to compare a first phase-voltage signal with a maximum limit value and a minimum limit value to
output a first limit-voltage signal;

a second limiter configured to compare a second phase-voltage signal with the maximum limit value and the minimum limit value
to output a second limit-voltage signal;

a third limiter configured to compare a third phase-voltage signal with the maximum limit value and the minimum limit value
to output a third limit-voltage signal; and

a summer configured to add up a difference between the first phase-voltage signal and the first limit-voltage signal, a difference
between the second phase-voltage signal and the second limit-voltage signal, and a difference between the third phase-voltage
signal and the third limit-voltage signal, to output an offset voltage,

wherein the maximum limit value and the minimum limit value are determined by a predetermined weight and a DC link voltage
of the three-phase inverter.

US Pat. No. 9,520,768

INVERTER CONTROL APPARATUS AND CONTROL METHOD THEREOF

LSIS CO., LTD., Anyang-s...

8. An inverter control method comprising:
detecting a current of each phase output from an inverter;
detecting whether there is an inverter fault based on the detected current;
storing a fault state of the inverter and a corresponding fault type based on the detected current; and
controlling driving of the inverter according a type of the detected inverter fault;
wherein controlling the driving of the inverter comprises classifying the detected fault into a first fault type limiting
an input command value according to the detected fault, a second fault type disabling the driving of the inverter, a third
fault type disabling the driving of the inverter and then re-enabling the driving of the inverter according to a condition
to drive the inverter, and a fourth fault type turning on/off the driving of the inverter, and

wherein controlling the driving of the inverter further comprises outputting an inverter driving control signal corresponding
to the detected fault type according to a preset priority.

US Pat. No. 9,438,247

APPARATUS FOR SIMPLIFICATION OF INPUT SIGNAL

LSIS CO., LTD., Anyang-s...

1. An apparatus for simplification of input signal configured to input, to an MPU (Micro Processing Unit), an output of an
input circuit at a PLC high speed counter module by converting the input to a single signal, the apparatus comprising:
a first detector configured to output a single pulse in response to a rising edge or a falling edge by detecting the rising
edge or the falling edge of a reference signal, which is a reference of adding or deducting calculation in response to an
operation mode of the high speed counter module;

a second detector configured to detect, from an output of the first detector, a pulse of rising edge or falling edge configured
to perform an actual adding or deducting calculation in response to an operation mode of the high speed counter module; and

a switching unit configured to output an output of the second detector using the adding or deducting calculation.

US Pat. No. 9,412,546

CONTROL UNIT FOR CIRCUIT BREAKER AND CONTROLLING METHOD THEREOF

LSIS CO., LTD., Anyang-s...

1. A control unit for a circuit breaker which interworks with a relay, the control unit comprising:
a status module configured to manage an operation status of the circuit breaker connected to the control unit;
an Ethernet drive configured to receive a GOOSE message type control signal from the relay via Ethernet communication;
a control module configured to operate the circuit breaker based on the GOOSE message type control signal; and
a main control unit (MCU) module configured to:
determine whether the GOOSE message type control signal is related to the control unit;
transmit the GOOSE message type control signal to the control module if the GOOSE message type control signal is related to
the control unit; and

delete the GOOSE message type control signal if the received GOOSE message type control signal is unrelated to the control
unit,

wherein the control unit is mounted outside of the circuit breaker as an independent module, and
wherein the relay is connected to one or more control units and the relay is configured to broadcast the GOOSE message type
control signal to the one or more control units via Ethernet communication.

US Pat. No. 9,362,065

MOLDED CASE CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A molded case circuit breaker, comprising:
a case provided with a power side terminal portion and a load side terminal portion to which a power side external terminal
and a load side external terminal are connected, respectively;

an interrupter assembly installed in the case, and provided with an arc gas outlet for discharging arc gas generated from
inside of the interrupter assembly to outside;

an exhaustion guiding portion disposed between the interrupter assembly and the terminal portion, and provided with a discharge
chamber therein, to thus provide an arc gas passage between the arc gas outlet and a vent chute of the terminal portion; and

an exhaustion cover mounted to the case with a structure to cover the exhaustion guiding portion, to thus block the arc gas
passage,

wherein the exhaustion cover is provided with sealing recesses therein,
wherein the exhaustion guiding portion is provided therein with sealing ribs protruding from the case and inserted into the
sealing recesses, and

wherein a land portion formed between the sealing recesses is engaged with the sealing rib.

US Pat. No. 9,354,276

APPARATUS AND METHOD FOR DETECTING FAILURE OF SWITCHING DEVICE IN INVERTER

LSIS CO., LTD., Anyang-s...

1. An apparatus for detecting failure of a switching device in an inverter, the apparatus comprising:
an angle sensor configured to measure a synchronous angle of a motor;
a current sensor configured to measure a phase current inputted to the motor through a switching device in a predetermined
leg of an inverter unit; and

a controller configured to:
detect a maximum value of the phase current at a first synchronous angle and detect a minimum value of the phase current at
a second synchronous angle, wherein the first synchronous angle and the second synchronous angle are ? degrees apart; and

determine failure of the switching device in the predetermined leg by determining an asymmetry ratio of the maximum value
and the minimum value on a single phase of the phase current.

US Pat. No. 9,333,867

CHARGING STAND FOR ELECTRIC VEHICLE

LSIS CO., LTD., Anyang-s...

1. A charging stand for an electric vehicle, the charging stand comprising:
a main body;
a door coupled to the main body;
a power supply unit configured to provide power to the electric vehicle; and
an alarm device configured to detect whether the door is open or closed and generate an alarm when the door is opened, the
alarm device comprising:

a door sensing unit configured to cause a change in impedance of a circuit of the alarm device when the door is opened;
a controller configured to receive a signal transmitted from the door sensing unit;
a switching circuit configured to be activated by the controller;
a relay configured to be turned on or off by the switching circuit;
a history record unit configured to record information related to each occurrence of the door opening according to an on/off
signal of the relay; and

an alarm unit configured to generate the alarm according to the on/off signal of the relay,
wherein the controller is further configured to:
shut off the power provided by the power supply unit when the door is opened;
repeatedly determine a status of the door at predetermined intervals of time;
cause the history record unit to generate a record for a result of each of the determinations, wherein each record separately
comprises the status and time of corresponding determination

determine each occurrence and a corresponding time of the door opening using each determined status of the door according
to an on/off status of the relay.

US Pat. No. 9,291,477

SAMPLING ENERGY METER READING SYSTEM USING DEMAND RESPONSE OF ENERGY PRICES FOR A POWER SAVING MODE

LSIS Co., Ltd., Anyang-S...

1. An energy metering system comprising:
a meter including:
a metering unit configured to generate energy consumption information based on loads at various locations;
a memory configured to store the energy consumption information;
a communication unit configured to receive and transmit the energy consumption information;
a current-time measuring unit configured to measure a current time using a real-time clock;
a battery configured to supply power to the communication unit;
a controller configured to:
cause the communication unit to receive control data related to a transmission time from a collector;
cause the communication unit to transmit the energy consumption information or an alarm message to the collector when the
voltage of the battery decreases to a certain value or less;

determine the transmission time based on the control data;
monitor whether the transmission time is reached by using the measured current time;
cause the communication unit to transmit the energy consumption information to the collector via a first network if the transmission
time is reached; and

operate in a power saving mode during which power is entirely interrupted except at the transmission time;
the collector configured to transmit the energy consumption information received from the communication unit to a server via
a second network and to generate the control data based on information related to an energy pricing system and transmit the
control data and an energy cost received from the server to the communication unit via the first network; and

the server configured to transmit the energy cost to the collector and receive the energy consumption information from the
collector via the second network,

wherein the transmission time includes a time at which the energy cost changes.

US Pat. No. 9,270,222

MULTI-LEVEL MEDIUM-VOLTAGE INVERTER

LSIS Co., Ltd., Anyang-S...

1. A multi-level medium-voltage inverter that receives three-phase power and outputs a three-phase voltage to a three-phase
motor, the multi-level medium-voltage inverter comprising:
a plurality of unit power cells connected in series to output a single phase voltage, wherein each of the plurality of unit
power cells outputs multi-level voltage outputs forming the single phase voltage; and

a module-type phase shift transformer configured to convert the three-phase power and apply the converted power to three unit
power cells constituting one level;

wherein the module-type phase shift transformer includes a plurality of modules, and each of the plurality of unit power cells
comprises:

a rectifying unit configured to rectify an output received from the module-type phase shift transformer;
a smoothing unit configured to smooth a DC voltage rectified by the rectifying unit; and
an inverter unit comprising a plurality of switch units, each switch unit including a diode and a power semiconductor connected
in parallel, wherein the plurality of switch units are configured in a cascaded T-type neutral point clamped (NPC) manner;
and

wherein, in the module-type phase shift transformer, a phase shift angle of a primary winding is determined using the number
of the module-type phase shift transformers, the number of outputs of a secondary side of the module-type phase shift transformer,
and the number of pulses of a rectifying unit of the unit power cell.

US Pat. No. 9,111,429

APPARATUS AND METHOD FOR MANAGING ALARMS OF SYSTEM

LSIS Co., Ltd., Anyang-S...

1. A method for managing alarms of a system, the method comprising:
receiving the alarms including state information of the system;
displaying an alarm queue including at least one of the received alarms;
setting important alarms from among the alarms in the displayed alarm queue; and
deleting at least one important alarm from the alarm queue when a user confirms the at least one important alarm or a signal
is received notifying a recovery to a normal state of a system corresponding to the at least one important alarm,

wherein a displayed alarm is marked with an indicator of a first color on the alarm queue when the system is in an abnormal
state,

wherein the displayed alarm is marked with the indicator of a second color on the alarm queue when the system is in the normal
state,

wherein the displayed alarm is marked with a first image of the first color on the alarm queue when the alarm is a general
alarm and is not confirmed by the user,

wherein the displayed alarm is marked with the first image of the second color on the alarm queue when the alarm is the general
alarm and is confirmed by the user, and

wherein the displayed alarm is marked with a second image of the second color on the alarm queue when the alarm is an important
alarm and is confirmed by the user.

US Pat. No. 9,102,239

TRAIN SPEED MEASURING DEVICE AND METHOD

LSIS Co., Ltd., Anyang-S...

1. A device for determining speed of a train, the device comprising:
a plurality of first tachometers each located at an axle of a trailer car of the train and configured to output pulse signals
according to a wheel revolution of the trailer car;

a plurality of second tachometers each located at an axle of a motor car of the train and configured to output pulse signals
according to a wheel revolution of the motor car;

at least one first speed measuring unit configured to receive a first speed value from each of the plurality of first tachometers;
at least one second speed measuring unit configured to receive a second speed value from each of the plurality of second tachometers;
a first speed calculating unit configured to receive a plurality of first speed values from the at least one first speed measuring
unit and to calculate an average value of the received plurality of first speed values in order to determine a first speed;
and

a second speed calculating unit configured to:
receive a plurality of second speed values from the at least one second speed measuring unit;
determine whether a deviation between the received plurality of second speed values is greater than a critical value; and
determine the speed of the train based on the determined first speed when the determined deviation between the received plurality
of second speed values is greater than the critical value.

US Pat. No. 10,073,485

METHOD FOR COMPENSATING INSTANTANEOUS POWER FAILURE IN MEDIUM VOLTAGE INVERTER AND MEDIUM VOLTAGE INVERTER SYSTEM USING THE SAME

LSIS CO., LTD., Anyang-s...

1. A method for compensating instantaneous power failure in an inverter including a plurality of power cells, the method comprising:determining whether an input voltage of the plurality of power cells is less than or equal to a first threshold voltage;
decreasing, when the input voltage is less than or equal to the first threshold voltage, an output frequency of the inverter;
determining whether a voltage of a direct current (DC) link is greater than or equal to a second threshold voltage; and
increasing, when the voltage of the DC link is greater than or equal to the second threshold voltage, the output frequency of the inverter,
wherein the increasing of the output frequency of the inverter comprises monitoring change of the voltage of the DC link resulting from regenerative energy supplied from a load to the plurality of power cells and a restored input voltage and increasing the output frequency by an increment of the voltage of the DC link at a time when the input voltage of the plurality of power cells greater than or equal to the first threshold voltage is restored,
the method further comprising: maintaining, when the increment of the voltage of the DC link resulting from the regenerative energy is eliminated, the output frequency of the inverter for a predetermined time,
wherein the maintaining is performed after the monitoring of the change and the increasing of the output frequency of the inverter.

US Pat. No. 9,671,467

ELECTRIC POWER METER CAPABLE OF MONITORING CONTACT STATUS OF LATCH RELAY

LSIS CO., LTD., Anyang-s...

1. An electric power meter capable of monitoring a contact status of a latch relay, the electric power meter comprising:
a latch relay having a pair of primary coils and a secondary contact, the secondary contact operable to a closed position
where an electric power from an electric power source is supplied to an electric load, or an open position where power supply
from the power source to the load side is interrupted, the primary coils configured to provide a magnetic force to open or
close the secondary contact; and

a meter controller connected to the latch relay, configured to compare an input voltage of the primary coils of the latch
relay with an output voltage of the secondary contact of the latch relay, configured to determine that the latch relay is
in a closed position when the input voltage of the primary coils is substantially equal to the output voltage of the secondary
contact with a predetermined allowable error range, and configured to determine that the latch relay is in an open position
when the output voltage of the secondary contact has not been input, even if the input voltage of the primary coils has been
input.

US Pat. No. 9,599,654

FAULT CURRENT DETECTING CIRCUIT

LSIS CO., LTD., Anyang-s...

1. A high-speed fault current detection circuit, comprising:
a primary current transformer configured to detect a current flowing through an electric power circuit in a grid to output
a current detection signal;

a pair of secondary current transformers connected to the primary current transformer to convert and provide the current detection
signal provided by the primary current transformer into secondary conversion signals, respectively;

a fault detection circuit section connected to any one output terminal of the one pair of secondary current transformers to
determine whether or not a fault current occurs on the electric power circuit by comparing a current value represented by
a secondary conversion signal outputted by either one of the one pair of secondary current transformers with a predetermined
reference current value of said fault detection circuit section, and output a fault detection signal when determined that
the fault current has occurred;

a surge detection circuit section connected to the other output terminal of the one pair of secondary current transformers
to determine whether or not a surge current occurs on the electric power circuit by comparing a current value represented
by a secondary conversion signal outputted by the other one of the one pair of secondary current transformers with a predetermined
reference current value of said surge detection circuit section, and output a surge detection signal when determined that
the surge current has occurred; and

a trip determination unit connected to output terminals of the fault detection circuit section and the surge detection circuit
section to receive the fault detection signal and the surge detection signal, and generates a trip control signal when at
least either one of the fault detection signal and the surge detection signal is received.

US Pat. No. 9,495,321

APPARATUS FOR RS-232C AND RS-485 SERIAL COMMUNICATION USING COMMON COMMUNICATION PORT

LSIS CO., LTD., Anyang-s...

1. An apparatus for serial communication configured to perform a serial communication through mutually different communication
methods, the apparatus comprising:
a communication converter configured to transmit a data using mutually different serial communication methods through a common
port in response to a provided communication method selection signal, or receiving a data from outside; and

a controller configured to provide the communication method selection signal and the transmission data to the communication
converter in response to a set parameter, and to receive the data transmitted from outside through the communication converter,

wherein the mutually different serial communication methods comprise an RS-232C communication method and an RS-485 communication
method, and

the communication converter includes:
a RS-232C driver configured to perform communication using the RS-232C communication method and a RS-485 driver configured
to perform communication using the RS-485 communication method;

a switching unit configured to provide the data to the controller and to outside by selectively switching between the RS-232C
driver and the RS-485 driver; and

a communication port controller configured to activate and deactivate the RS-232C driver and the RS-485 driver respectively
in response to the selection signal, and to control transmission/reception operation of data in response to a control signal
of the controller,

wherein the communication port controller includes an RS-232C controller configured to activate and deactivate the RS-232C
driver in response to the selection signal of the controller, and an RS-485 controller configured to control transmission/reception
operation of the RS-485 driver in response to the control signal provided from the controller.

US Pat. No. 9,484,167

COUPLING DEVICE FOR CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A coupling device for a circuit breaker, the coupling device comprising:
an outer handle assembly coupled to a shaft and installed at a distribution board;
a circuit breaker body;
an inner handle rotatably installed at the circuit breaker body and configured to manipulate the circuit breaker; and
a coupling assembly configured to transmit a rotational force of the outer handle assembly to the inner handle,
wherein the coupling assembly includes:
a first coupler coupled to the outer handle assembly, the first coupler comprising one or more first coupling protrusions
protruding away from the outer handle assembly along a first shaft-wise direction;

a second coupler coupled to the inner handle, the second coupler comprising one or more second coupling protrusions protruding
away from the inner handle in a second shaft-wise direction, wherein the second coupling protrusions interlockingly correspond
to the first coupling protrusions and are longitudinally restricted by the first coupler along the second shaft-wise direction;

a third coupler positioned between the first coupler and the second coupler and configured to transmit a rotational force
from the first coupler to the second coupler; and

a coupling spring configured as a compression coil spring provided between the first coupler and the second coupler,
wherein the third coupler comprises:
a body portion formed in a ring shape such that the coupling spring is inserted into the body portion, wherein the body portion
is provided at an inner side of an inner circumferential surface of the first coupling protrusions and the second coupling
protrusions; and

a plurality of sliding protrusions radially protruding from an outer circumferential surface of the body portion, each sliding
protrusion disposed between a side surface of a corresponding one of the first coupling protrusions and a side surface of
a corresponding one of the second coupling protrusions to transmit the rotational force in a circumferential direction,

wherein a first side surface and a second side surface of each of the sliding protrusions are formed as curved surfaces and
configured to contact the corresponding side surfaces of the first coupling protrusions and the second coupling protrusions
in a circumferential direction.

US Pat. No. 9,472,938

BUSBAR COUPLING DEVICE ASSEMBLY

LSIS CO., LTD., Anyang-s...

1. A busbar coupling device comprising:
a plate including a first side and a second side disposed opposite to each other;
a first end wall part protruding and extending in a direction that the first side faces at a first end part in a length direction
of the plate;

a first protrusion part disposed at the plate, spaced from the first end wall part, and protruding in the direction that the
first side faces;

a second end wall part protruding and extending from a second end part disposed opposite to the first end part to a direction
that the second side faces in the length direction of the plate; and

a second protrusion part disposed at the plate, spaced from the second end wall part, and protruding in the direction that
the second side faces;

a first upper wall part extending along an upper end of the plate and protruding at an upper part of the plate in the direction
that the first side faces;

a first edge wall part protruding in the direction that the first side faces, one end of the first edge wall part contacting
the first end wall part and the other end of the first edge wall part contacting the first upper wall part;

a first cover wall part spaced a predetermined distance from the first side of the plate such that a first space is created
and protruding in the direction that the first side faces, the first cover wall part coupled to front ends of the first end
wall part, the first upper wall part and the first edge wall part;

a second upper wall part extending along an upper end of the plate and protruding at an upper part of the plate in the direction
that the second side faces;

a second edge wall part protruding in the direction that the second side faces, one end of the second edge wall part contacting
the second end wall part and the other end of the second edge wall part contacting the second upper wall part;

a second cover wall part spaced a predetermined distance from the second side of the plate such that a second space is created
and protruding in the direction that the second side faces, the second cover wall part coupled to front ends of the second
end wall part, the second upper wall part and the second edge wall part;

a first busbar having a main body and a plurality of terminals, the plurality of terminals bent and extending from a lower
part of the main body in the direction that the first side faces and a first edge of the first busbar inserted into the first
space between the first side of the plate and the first cover part wall part such that the first protrusion becomes a lower
part of the main body of the first busbar; and

a second busbar having a main body and a plurality of terminals, the plurality of terminals bent and extending from a lower
part of the main body in the direction that the first side faces and a second edge of the second busbar opposite to the first
edge of the first busbar inserted into the second space between the second side of the plate and the second cover part wall
part such that the second protrusion becomes a lower part of the main body of the second busbar.

US Pat. No. 9,454,369

DEVICE AND METHOD FOR PROCESSING MESSAGE

LSIS CO., LTD., Anyang-s...

1. A method for processing messages of a first processor and a second processor in a communication module of a programmable
logic controller (PLC) comprising the first processor, the second processor and a shared memory comprising a first sector
for storing high-priority messages and a second sector for storing low-priority messages, the method comprising:
determining, by the first processor, a priority order to be processed by the second processor and writing a request message
in the first sector or the second sector of the shared memory according to the priority order;

processing, by the second processor, communication for the request message of the first sector with precedence over the second
sector;

checking, by the second processor, the priority order of the request message and writing a response message in the first sector
or the second sector of the shared memory according to the priority order;

moving, by the first processor, when the response message exists in the first sector of the shared memory, the response message
in the first sector to a function address defined in the response message processing function field of the response message
written in the first sector;

checking, by the first processor, when the response message does not exist in the first sector of the shared memory, whether
the response message exists in the second sector of the shared memory; and

moving by the first processor, the response message in the second sector to the function address defined in the response message
processing function field of the response message written in the second sector,

wherein the message function address is an address of a function processed according to a message type, and
wherein each of the request message and the response message comprises a message type field, a message priority order field,
and a response message processing function address field.

US Pat. No. 9,431,184

CIRCUIT BREAKER

LSIS CO., LTD., Anyang-s...

1. A circuit breaker, comprising:
a vacuum interrupter including a fixed contact and a movable contact;
a driving unit including a main shaft rotatable between a closing position where the movable contact contacts the fixed contact
and an opening position where the movable contact is separated from the fixed contact, and a plurality of links interlocked
with the main shaft, and configured to supply a driving force to open and close the vacuum interrupter;

a power transmission unit disposed between the driving unit and the vacuum interrupter, and configured to transmit a driving
force of the driving unit to the movable contact;

an over-current relay configured to detect a fault current and to output a trip signal to break a large-scaled current conduction;
a trip unit disposed at one side of the driving unit, and configured to generate and transmit a mechanical operation force
to the driving unit when a trip signal is output from the over-current relay; and

a Thomson drive including a Thomson coil, and a repulsive plate configured to be spaced from the Thomson coil by an electromagnetic
repulsive force when a power is applied to the Thomson coil, the Thomson drive configured to be connected to the power transmission
unit to rotate the main shaft to an opening position by a movement of the repulsive plate when a power is applied to the Thomson
coil, or the Thomson drive configured to be provided at the trip unit and to transmit the trip signal to the trip unit by
a movement of the repulsive plate when a power is applied to the Thomson coil,

wherein the Thomson drive is provided at the trip unit, and
wherein the trip unit comprises: a trip latch disposed to be rotatable between a restricting position where one of the links
is restricted from being rotated to the closing position by contacting the one of the plurality of links that rotate the main
shaft to the closing position, and a releasing position where the one of the links is allowed to rotate to the closing position;
and

a trip lever disposed at one side of the trip latch and configured to restrict the trip latch from rotating to the releasing
position or configured to release the restriction, and wherein the Thomson drive comprises a signal transmission actuator,

wherein the signal transmission actuator comprises:
a Thomson coil disposed at one side of the trip lever; and
a repulsive plate disposed at one side of the Thomson coil and configured to move the trip lever to the releasing position
when a power is applied to the Thomson coil.

US Pat. No. 9,411,705

EVENT COMMUNICATION APPARATUS FOR PROTECTION RELAY

LSIS CO., LTD., Anyang-s...

1. An event communication apparatus for a protection relay which transmits event data to a supervisory monitor, the event
communication apparatus comprising:
a shared memory configured to store and provide data to share;
a main processing module configured to, whenever an event occurs, update previous event data to a status information of the
event and a status occurrence time information as new event data, and write the updated event data into the shared memory;
and

a communication module configured to periodically read status information from the shared memory, compare the read status
information with pre-stored previous status information to determine whether there is a status change, determine occurrence
of a new event when there is the status change, and transmit corresponding event data to the supervisory monitor immediately
when the new event occurs,

wherein a priority of an operation of writing event data in the shared memory whenever the event data occurs is set higher
than priorities of other operations for the main processing module, and

wherein a priority of an operation of periodically reading the shared memory is set higher than priorities of other operations
for the communication module.

US Pat. No. 9,196,436

RING MAIN UNIT CIRCUIT BREAKER EQUIPPED WITH CONTACT FORCE CONTROLLER

LSIS Co., Ltd., Anyang-S...

1. A ring main unit circuit breaker equipped with a contact force controller, the circuit breaker comprising:
a rotational shaft;
a cam configured to convert a rotation force of the rotational shaft into a vertical force;
a power transmission pin which performs up-down movement by the cam;
a movable rod coupled to the power transmission pin;
a contact spring configured to provide a contact force to the movable rod;
a vacuum interrupter having one end connected to the movable rod,
a driving shaft installed at a driving unit;
a driving link which rotates by being coupled to the driving shaft;
a transmission link formed to have a controllable length, and performing up-down movement with its one end coupled to the
driving link; and

a rotation link coupled to another end of the transmission link, and providing a rotation force to the rotational shaft,
wherein the transmission link includes:
an upper rod;
a lower rod; and
a length controlling rod disposed between the upper rod and the lower rod, for coupling thereto,
wherein a screw groove is formed at a lower end of the upper rod,
wherein a screw groove is formed at an upper end of the lower rod,
wherein the screw groove formed at a lower end of the upper rod and the screw groove formed at an upper end of the lower rod
have opposite direction.

US Pat. No. 9,147,539

HIGH VOLTAGE GAS CIRCUIT BREAKER

LSIS Co., Ltd., Anyang-S...

1. A high voltage gas circuit breaker, comprising:
a fixed unit including a fixed arc contactor and a fixed contactor; and
a movable unit including a movable arc contactor and a movable contactor, and configured to selectively contact or be separated
from the fixed unit,

wherein the movable unit comprises:
a fixed cylinder;
a compression cylinder slidably-installed in the fixed cylinder;
a movable rod penetratingly-coupled to the compression cylinder, and configured to transmit an adjusting force of an operator;
a pressing member installed on an inner bottom part of the compression cylinder; and
a compression plate supported by the pressing member, and up-down moving in the compression cylinder by a pressure of an expansion
chamber, and

wherein an upper protrusion and a lower protrusion are formed on an inner wall of the compression cylinder, such that the
expansion chamber has a minimized volume when the compression plate contacts the upper protrusion, and the expansion chamber
has a maximized volume when the compression plate contacts the lower protrusion.

US Pat. No. 9,118,254

DC-DC CONVERTER UTILIZING OUTPUT POWER TO TURN OFF SWITCHES

LSIS Co., Ltd., Anyang-S...

1. A DC-DC converter comprising:
a power input unit to which power is applied;
a first module comprising a first transformer and a second transformer to output a first output power transformed according
to operations of a first switch and a second switch connected with the first transformer and the second transformer by using
the applied power;

a second module comprising a third transformer and a fourth transformer to output a second output power transformed according
to operations of a third switch and a fourth switch connected with the third transformer and the fourth transformer by using
the applied power;

an output unit to output a sum of the first output power and the second output power;
a controller to control an interleaving operation between the first module and the second module;
wherein the controller controls the first switch and the third switch to be turned on if the power is applied, and
the first transformer and the third transformer respectively transfer the first output power and the second output power to
the output unit to turn off the second switch and the fourth switch, such that the second transformer and the fourth transformer
are shorted with respect to the output unit.

US Pat. No. 9,866,105

METHOD OF CONTROLLING AN INVERTER

LSIS CO., LTD., Seoul (K...

1. A method of controlling an inverter comprising a rectification unit rectifying input AC power to DC power, a smoothing
unit smoothing the DC power, and a power conversion unit converting the smoothed DC power into AC power having a predetermined
size and frequency, the method comprising:
receiving an abnormal signal of either the inverter or an electric motor for driving the inverter;
determining whether a DC terminal voltage of the smoothing unit is equal to or greater than a low voltage failure level when
the abnormal signal is received;

checking a driving state of the power conversion unit when the DC terminal voltage of the smoothing unit is equal to or greater
than the low voltage failure level;

blocking current output of the power conversion unit when the power conversion unit is driving;
determining that the abnormal signal is generated due to a malfunction of the inverter when the DC terminal voltage is less
than the low voltage failure level or when the power conversion unit is not driving; and

outputting a failure signal when the power conversion unit is driving only when it is determined that the abnormal signal
is not generated due to the malfunction.

US Pat. No. 9,813,785

TELEMETRY SYSTEM

LSIS CO., LTD., Gyeonggi...

1. A telemetry system connected to a plurality of meters for remote metering, the telemetry system comprising:
a data reader configured to acquire meter reading information for each of the meters;
a transmitter configured to receive the meter reading information for each of the meters acquired through the data reader
and transmit a corresponding signal;

a receiver configured to receive transmission information from the transmitter; and
a meter reading server configured to manage the meter reading information for each of the meters based on the transmission
information received through the receiver,

wherein the transmitter is configured to transmit the meter reading information to a corresponding Bluetooth beacon signal
using a Bluetooth beacon technique that is a Bluetooth 4.0 protocol-based NFC (Near-Field Communication) technique.

US Pat. No. 9,613,771

RELAY

LSIS CO., LTD., Anyang-s...

1. A relay comprising:
a first fixed contact connected to a power source;
a second fixed contact separated from the first fixed contact, and connected to a load; and
a moving contact configured to be brought into contact with or separated from the first fixed contact and the second fixed
contact,

wherein the moving contact comprises:
a first moving contact configured to be brought into contact with or separated from the first fixed contact and the second
fixed contact; and

a second moving contact separated from the first moving contact, and configured to be brought into contact with or separated
from the first fixed contact and the second fixed contact,

wherein,
the first fixed contact comprises:
a first body part to which a current is applied; and
a first arm part configured to protrude from the first body part toward the second fixed contact,
the second fixed contact comprises:
a second body part configured to output a current; and
a second arm part configured to protrude from the second body part toward the first fixed contact,
the first moving contact contacts the first body part and the second body part in a state where the first moving contact is
separated from the first arm part and the second arm part, and

the second moving contact protrudes from the first moving contact to the first arm part and the second arm part, and contacts
the first arm part and the second arm part.

US Pat. No. 9,606,161

APPARATUS AND METHOD FOR DIAGNOSING MALFUNCTION OF HIGH VOLTAGE RELAY DEVICE

LSIS CO., LTD., Anyang-s...

1. An apparatus and method for diagnosing malfunction of a high voltage relay, the apparatus comprising:
a first relay having a first terminal connected to a positive terminal of a battery and having a second terminal connected
to a circuit using the battery as a power source, wherein the first relay is configured to connect or disconnect the battery
and the circuit;

a second relay having a first terminal connected to a negative terminal of the battery and having a second terminal connected
to the circuit, wherein the second relay is configured to connect or disconnect the battery and the circuit;

a first measuring unit configured to connect both terminals of the battery and measure a first voltage value across the both
terminals of the battery;

a second measuring unit configured to connect both terminals of the circuit and measure a second voltage value across the
both terminals of the circuit;

a third measuring unit connected to a battery side terminal among terminals of the first relay and a circuit side terminal
among terminals of the second relay, and configured to measure a third voltage value between the battery side terminal and
the circuit side terminal; and

a controller configured to determine whether the first or second relay malfunctions based on the first voltage, the second
voltage, and the third voltage values measured by the first, second, and third voltage measuring units by controlling connection
and disconnection of the first or second relay.

US Pat. No. 9,570,258

MAGNETIC SWITCH

LSIS CO., LTD., Anyang-s...

1. A magnetic switch, comprising:
an upper frame formed in a box shape and having an open lower surface;
a pair of fixed contacts installed within the upper frame;
a movable contact brought into contact with the pair of fixed contacts to enable conduction of a circuit or separated from
the pair of fixed contacts to block conduction of the circuit;

a pair of permanent magnets located on a portion of the upper frame; and
a permanent magnet holder coupled to a portion of the upper frame to fix the pair of permanent magnets to the upper frame,
wherein a first mounting portion is provided at an outer side of a front surface of the upper frame and a second mounting
portion is provided at an outer side of a rear surface of the upper frame in order to place one of the pair of permanent magnets
into the first mounting portion and the other of the pair of permanent magnets into the second mounting portion,

wherein the permanent magnet holder is formed in a U-shape and coupled to an upper portion of the upper frame to fix the pair
of permanent magnets to the upper frame,

wherein a holder insertion portion into which the permanent magnet holder is fixed is formed on an upper surface of the upper
frame.

US Pat. No. 9,570,232

TRANSFORMER FOR POWER LINE COMMUNICATION

LSIS CO., LTD., Anyang-s...

1. A transformer for power line communication, the transformer configured to receive an input voltage comprising an electrical
power signal and a data signal and comprising:
a transforming unit configured to convert a high primary voltage to a low secondary voltage;
a separation unit configured to separate the data signal from the high primary voltage;
a coupling unit configured to couple the data signal with the low secondary voltage;
a first filter configured to filter the data signal from the high primary voltage and to provide only the electrical power
signal to the transforming unit; and

a second filter configured to filter the data signal and the low secondary voltage received from the coupling unit and to
output the combined signal to the transforming unit.

US Pat. No. 9,535,107

APPARATUS FOR DIAGNOSING DC LINK CAPACITOR OF INVERTER

LSIS CO., LTD., Anyang-s...

1. A diagnosis apparatus for diagnosing deterioration of a DC link capacitor of an inverter having the DC link capacitor and
an inverter part comprising a plurality of switching devices generating three phase AC voltages to a load connected to the
diagnosis apparatus, the diagnosis apparatus comprising:
a current detector configured to detect a current supplied to a motor in the inverter part;
a switching mode power supplier (SMPS) configured to supply a DC voltage and to be coupled to the DC link capacitor; and
a controller configured to control the DC voltage supplied from the SMPS to the motor to have a predetermined level, the controller
being arranged to estimate the change of a ratio of a deteriorated capacitance to an initial capacitance of the DC link capacitor
by considering power consumption of the motor, power consumption of the SMPS and a switching loss of the inverter part, wherein
the estimation includes, in response to the voltage of the DC link capacitor reaching a predetermined final level:

determining a first factor, k_old, based on a ratio of the power consumption of the SMPS and switching loss to power consumption
of the motor using the deteriorated capacitance of the DC link capacitor,

determining a second factor, k_int, based on a ratio of the power consumption of the SMPS and switching loss to power consumption
of the motor using the initial capacitance of the DC capacitor,

determining a first product by multiplying the first factor, k_old, with a rate of the power consumption of the motor using
the deteriorated capacitance of the DC link capacitor,

determining a second product by multiplying the second factor, k_int, with the rate of the power consumption of the motor
using the initial capacitance of the DC link capacitor,

determining a quotient of the first and second products to diagnose the DC link capacitor, and
controlling the plurality of switching devices in a preset manner such that the controller detects the capacitance of the
DC link capacitor.

US Pat. No. 9,525,363

METHOD FOR VOLTAGE DIP COMPENSATION OF INVERTER

LSIS CO., LTD., Anyang-s...

1. A method for voltage dip compensation of inverter, the method comprising:
performing a momentary voltage dip test for grasping a load characteristic of a load installed at a field site with a basic
set point to cope with a momentary voltage dip;

determining whether a relevant load is a load that requires an additional current control in response to the grasped load
characteristic;

setting the relevant load as a current control subject when it is determined that the relevant load is the current control
subject as a result of determination, and setting the relevant load as not a current control subject when it is determined
that the relevant load is not the current control subject as a result of determination;

setting to perform a momentary voltage dip compensation using voltage and current control on a relevant inverter when a momentary
power failure occurs to a load set as the current control subject during inverter operation;

reducing an output frequency of an inverter to obtain a regenerative energy when it is determined that power failure has occurred
during the inverter operation;

adjusting increase/decrease of inverter output frequency in response to size of exceeding current and voltage based on an
output current and DC-link voltage of the inverter;

increasing the inverter output frequency in order to prevent excessive current flow when power restoration occurs at a power
failure state; and

returning to a speed prior to the momentary voltage dip by gradually increasing the inverter output frequency in a state where
the inverter output frequency does not exceed an over-current limit by monitoring the inverter output frequency.

US Pat. No. 9,481,259

BIDIRECTIONAL VEHICLE CHARGING APPARATUS AND OPERATION METHOD THEREOF

LSIS CO., LTD, Anyang-si...

1. A bidirectional vehicle charging apparatus to supply a power to a battery of an electric vehicle, the charging apparatus
comprising:
a bidirectional power converter including three pairs of switching device groups, at least one capacitor and at least one
inductor and having a first port connected to a power system and an a second port connected to an energy storage, in which
the bidirectional power converter converts an AC power input through the first port into a DC power to output the DC power
to the second port in a forward operation mode and converts the DC power input through the second port into a plurality of
DC powers to output the plurality of DC powers to the first port in a first inverse operation mode, wherein the bidirectional
power converter is operated as an AC-DC converter according to switching operation of the three pairs of switching device
groups in the forward operation mode and is operated as a plurality of buck-converters according to switching operation of
the three pairs of switching device groups in the first inverse operation mode;

the energy storage connected to the second port of the bidirectional power converter to store the DC power output through
the second port of the bidirectional power converter;

a multi-DC power outputter disposed between the power system and the first port of the bidirectional power converter to output
the plurality of DC powers, which is output through the first port of the bidirectional power converter, to outside components
in the first inverse operation mode;

a first switch having one end connected to the first port of the bidirectional power converter and an opposite end selectively
connected to one of an input line of a 3-phase AC power and the multi-DC power outputter;

a charging controller to detect a charging condition of the charging apparatus, in which the charging controller operates
the bidirectional power converter in the forward operation mode to charge the energy storage when the charging condition is
a first condition and operates the bidirectional power converter in the first inverse operation mode to output the DC power
through the multi-DC power outputter when the charging condition is a second condition; and

a DC power outputter connected to the second port of the bidirectional power converter to output the DC power converted by
the bidirectional power converter to an outside component in the forward operation mode,

wherein the multi-DC power outputter outputs the plurality of DC powers, and the DC power outputter outputs a single DC power,
wherein the DC power output to the outside component has a level that is higher than a level of the DC power converted by
the bidirectional power converter in the first inverse operation mode, and

wherein the three pairs of the switching device groups of the bidirectional power converter serve as buck-converters, respectively,
in the first inverse operation mode to convert the DC power into the plurality of DC powers having a level that is different
from the level of the DC power.

US Pat. No. 9,434,269

CHARGING DEVICE ASSEMBLY FOR ELECTRIC VEHICLE

LSIS CO., LTD., Anyang-s...

1. A charging device assembly for an electric vehicle, the assembly comprising:
a cable connecting the electric vehicle to a power supply unit;
a charge control device coupled with the cable;
a main bracket detachably coupled to the charge control device; and
an ad-on communication device coupled to the main bracket,
wherein the charge control device comprises an ad-on communication unit configured to perform wireless short-distance communication,
wherein the ad-on communication device comprises:
a charge control device communication unit configured to perform wireless short-distance communication with the ad-on communication
unit; and

a terminal communication unit configured to communicate wirelessly with a terminal displaying a charging operation or a state
of the electric vehicle,

wherein when the charge control device is coupled with the main bracket, the ad-on communication unit of the main bracket
and the charge control device communication unit of the ad-on communication device are disposed at corresponding adjacent
positions,

wherein the ad-on communication device is detachably coupled to the main bracket, and
wherein the ad-on communication unit is disposed to be proximate to one surface of the charge control device, wherein the
one surface is adjacent to the charge control device communication unit when the charge control device is coupled with the
main bracket.

US Pat. No. 9,407,167

TERMINAL CIRCUIT IN INVERTER

LSIS CO., LTD., Anyang-s...

1. A terminal circuit in an inverter, the terminal circuit comprising:
a photo-coupler configured to electrically insulate input/output signals, receive an open collector output signal or a pulse
output signal from a first port and to output the received open collector output signal or pulse output signal to a second
port via a first output terminal;

a pull-up resistor variably connected between the first output terminal and the second port, a resistance value of the pull-up
resistor determined by a time constant;

a transistor having a base (B) terminal connected to a second output terminal of the photo-coupler; and
a bias resistor connected to the B terminal of the transistor and to an emitter (E) terminal of the transistor, a resistance
value of the bias resistor determined such that a duty ratio of the pulse output signal is within a predetermined range,

wherein connection of the pull-up resistor is determined by a device using the pulse output signal as an input such that the
pull-up resistor is not connected when the device receives an open collector-type pulse input and the pull-up resistor is
connected when the device does not receive the open collector-type pulse input.

US Pat. No. 9,400,303

METHOD OF DETECTING STATE OF POWER CABLE IN INVERTER SYSTEM

LSIS CO., LTD., Anyang-s...

1. A method of detecting a state of a power cable in an inverter system, the method comprising:
detecting a direct current (DC)-link voltage value of a DC-link capacitor included in an inverter;
receiving a first battery voltage value from a first electronic control unit;
determining whether the first battery voltage value is a value included within a preset normal range;
receiving a second battery voltage value from a second electronic control unit when the first battery voltage value is not
the value included within the preset normal range,

determining whether the second battery voltage value is the value included within the preset normal range;
detecting a preset low voltage trip level when the second battery voltage value is not the value included within the preset
normal range,

comparing the DC-link voltage value with a reference value; and
determining the state of the power cable connecting the inverter based on a result of the comparing,
wherein the reference value is the first battery voltage value when the first battery voltage value is the value included
within the preset normal range,

wherein the reference value is the first battery voltage value when the second battery voltage value is the value included
within the preset normal range,

wherein the reference value is the preset low voltage trip level when all the first battery voltage value and the second battery
voltage value are not the values included within the preset normal range,

wherein the first electronic control unit is one of a battery management system (BMS) or a low voltage DC-DC converter (LDC),
wherein the second electronic control unit is one of a BMS or an LDC, different from the first electronic control unit.

US Pat. No. 9,401,665

ELECTRIC POWER CONVERSION APPARATUS

LSIS CO., LTD., Anyang-s...

1. An electric power conversion apparatus, comprising:
a converter;
a control unit configured to detect a grid voltage so that the control unit determines a minimum output voltage of the converter
based on the grid voltage, and control the operation of the converter based on an input voltage of the converter and the determined
minimum output voltage;

an inverter linked to an output stage of the converter; and
an LC filter between the inverter and a grid,
wherein the inverter is configured with a DC/AC inverter linked to the grid to convert a DC voltage output from the converter
into a commercial AC voltage that can be used in the grid,

wherein the control unit comprises:
a first controller configured to detect an input voltage of the converter; and
a second controller configured to detect an input/output voltage of the inverter,
wherein the first controller and the second controller are further configured to transmit and receive voltage information
detected therebetween,

wherein the first controller is further configured to detect an input voltage of the converter so that the first controller
compares the input voltage with the determined minimum output voltage information transmitted from the second controller,
and controls the switching operation of the converter based on the comparison result, and

the second controller is further configured to detect a voltage of the grid so that the second controller determines a minimum
output voltage of the converter based on the grid voltage and transmits the determined minimum output voltage information
to the first controller.

US Pat. No. 9,269,506

MOVABLE CONTACT ARM FOR MOLDED CASE CIRCUIT BREAKER AND MOVABLE CONTACT ARM ASSEMBLY

LSIS Co., Ltd., Anyang-S...

1. A movable contact arm for a molded case circuit breaker, the movable contact arm comprising:
an adhesive material removal portion formed on a lateral surface, the adhesive material removal portion removing adhesive
materials loosened by an arc contacting the adhesive materials according to movement of the movable contact arm; and a contact
located on the lateral surface, wherein the adhesive material removal portion comprises a longitudinal cross section having
a wedge shape, an arc shape or a saw teeth shape that minimizes a contact area with the adhesive materials; wherein the adhesive
material removal portion and the contact are located on different portions of the lateral surface.

US Pat. No. 9,246,430

METHOD FOR CONTROLLING AN INVERTER

LSIS Co., Ltd., Anyang-S...

1. A method for controlling an inverter that supplies power to a motor, the method performed by a controller and comprising:
determining if the motor is in a manual mode;
calculating an optimal speed;
determining a final speed as the optimal speed both when a command speed is higher than a rated speed level of the motor and
when the motor is not in the manual mode and the command speed is lower than or equal to both the rated speed level and a
predetermined optimal speed level;

determining the final speed as the command speed both when the motor is in the manual mode and the command speed is lower
than or equal to both the rated speed level and the predetermined optimal speed level and when the command speed is lower
than or equal to the rated speed level and higher than the predetermined optimal speed level; and

supplying the determined final speed to the inverter,
wherein calculating the optimal speed comprises:
setting a torque limit;
accumulating torques during a set time;
calculating an average of the accumulated torques; and
calculating the optimal speed using the set torque limit, the calculated average of the accumulated torques and the rated
speed level.

US Pat. No. 9,219,440

APPARATUS FOR ESTIMATING PARAMETER IN INDUCTION MOTOR

LSIS Co., Ltd., Anyang-S...

1. An apparatus for estimating a parameter of an induction motor including a current controller outputting d and q-axis voltages
in a synchronous reference frame from d and q-axis current references and d and q-axis currents in the synchronous reference
frame applied to the induction motor and a magnetic flux angle calculating unit calculating a magnetic flux angle by using
d and q-axis currents in the synchronous reference frame applied to the induction motor and a rotor speed of a rotor of the
induction motor, in a control system, the apparatus comprising:
a state estimator configured to calculate an error value of a rotor resistance based on an output received from the current
controller and the d and q-axis currents in the synchronous reference frame applied to the induction motor; and

an integral controller configured to:
obtain a difference value between an actual rotor resistance based on the calculated error value received from the state estimator
and a nominal rotor resistance; and

output the difference value to the current controller and the magnetic flux angle calculating unit.

US Pat. No. 9,218,306

MEMORY SHARING CIRCUIT EMPLOYING A BUFFERED ADDRESS AND DATA BUS AND PREVENTING BUS COLLISION

LSIS Co., Ltd., Anyang-S...

1. A memory sharing circuit comprising a plurality of unit processors connected to a memory, wherein each unit processor of
the plurality of unit processors includes:
a buffer configured to be connected to the memory via a buffering address bus and a buffering data bus; and
a processor configured to be connected to the buffer for access to the memory through the buffer;
wherein the plurality of unit processors are configured to allow all other processors of the plurality of unit processors
to share the memory by preventing address or data bus collision; and

wherein the memory sharing circuit further comprises a logic circuit unit configured to determine a logic value of a grant
signal (GNT) of each processor of the plurality of unit processors and a logic value of an enable signal (EN) of each buffer
of the plurality of unit processors using a signal buffered and output by the buffer.

US Pat. No. 9,147,775

RIBBON FOR PHOTOVOLTAIC MODULE

LSIS Co., Ltd., Anyang-S...

1. A ribbon for a photovoltaic module, the ribbon comprising:
a plurality of first interconnection ribbons directly connected to a first solar battery cell;
a plurality of second interconnection ribbons directly connected to a second solar battery cell; and
a bus ribbon directly connected to the plurality of first interconnection ribbons and the plurality of second interconnection
ribbons,

wherein the bus ribbon comprises:
a first ribbon connecting portion directly connected to the plurality of first interconnection ribbons, one end of the first
ribbon connecting portion including a first contact portion directly connected to one of the plurality of first interconnection
ribbons, and another end of the first ribbon connecting portion including a second contact portion directly connected to another
of the plurality of first interconnection ribbons;

a second ribbon connecting portion directly connected to the plurality of second interconnection ribbons, one end of the second
ribbon connecting portion including a third contact portion directly connected to one of the plurality of second interconnection
ribbons, and another end of the second ribbon connecting portion including a fourth contact portion directly connected to
another of the plurality of second interconnection ribbons; and

a string connecting portion comprising:
a first end directly connected to the first ribbon connecting portion at a middle portion of the first ribbon connecting portion
located between the first contact portion and the second contact portion of the first ribbon connecting portion; and

a second end connected to the second ribbon connecting portion at a middle portion of the second ribbon connecting portion
located between the third contact portion and the fourth contact portion of the second ribbon connecting portion;

wherein:
the first, second, third, and fourth contact portions are a same shape;
widths of the first and second contact portions gradually increase from a width of the middle portion of the first ribbon
connecting portion such that ends of the first ribbon connecting portion are wider than a width of the middle portion of the
first ribbon connecting portion;

widths of the third and fourth contact portions gradually increase from a width of the middle portion of the second ribbon
connecting portion such that ends of the second ribbon connecting portion are wider than a width of the middle portion of
the second ribbon connecting portion; and

the first ribbon connecting portion and the second ribbon connecting portion are a same shape and a same size.

US Pat. No. 9,100,420

SYSTEM FOR REMOTELY MANAGING ELECTRIC VEHICLE

LSIS Co., Ltd., Anyang-S...

1. A system for remotely managing an electric vehicle, the system comprising:
a first meter located remotely from the electric vehicle and configured to meter an amount of electric energy used to charge
the electric vehicle and to receive data via communication with the electric vehicle;

a first repeater configured to receive information related to the electric vehicle from the first meter and to relay the received
information;

a second repeater configured to relay the information related to the electric vehicle;
a second meter installed in a user's home and configured to receive the information related to the electric vehicle from the
second repeater;

a remote management server configured to receive the information related to the electric vehicle from the first repeater,
to transfer the information to the second repeater through a communication network, and to store a correspondence relationship
between vehicle identification information and second meter identification information for each of a plurality of electric
vehicles; and

an in-home display (IHD) device configured to analyze and manage the information related to the electric vehicle that is received
by the second meter and to transmit an electric vehicle control command to the electric vehicle sequentially via the second
meter, the remote management server and the first meter, the control command input by a user via the IHD,

wherein the control command is related to at least starting/turning off the vehicle, opening/closing a window, turning a headlight
on/off or adjustment of internal temperature, and

wherein the information related to the electric vehicle comprises at least a starting state, an open/closed state of a window
or door, an on/off state of a headlight, a state of a burglar alarm or information input via a user input device.

US Pat. No. 9,070,521

CIRCUIT BREAKER

LSIS Co., Ltd., Anyang-S...

1. A circuit breaker comprising:
a cradle having an accommodation space therein and a plurality of terminals; and
a breaker main body having a plurality of terminal connectors and a plurality of vacuum interrupters, each of the plurality
of terminal connectors contactable with one the plurality of terminals and each of the plurality of vacuum interrupters connected
to one of the plurality of terminal connectors the breaker main body installed within the cradle such that the breaker main
body is movable between a connected position in which the plurality of terminal connectors are connected to the plurality
of terminals and a disconnected position in which the plurality of terminal connectors are separated from the plurality of
terminals,

wherein each of the plurality of terminal connectors comprises:
a plurality of segment conductors each having one end connected to the corresponding vacuum interrupter and the other end
facing the corresponding terminal;

a contact member connected to the other end of each of the plurality of segment conductors to allow for current flow and connected
to the corresponding terminal at a connected position of the breaker main body; and

a coupling conductor simultaneously coupled to the other end of the plurality of segment conductors and having a periphery
coupled with the contact member, and

wherein each coupling conductor comprises a body and a plurality of coupling portions formed on one side of the body for connection
to an end portion of each of the plurality of corresponding segment conductors.

US Pat. No. 9,812,986

APPARATUS FOR BALANCING VOLTAGES OF DC LINK CAPACITOR IN INVERTER

LSIS CO., LTD., Gyeonggi...

1. An apparatus for balancing voltages applied to first and second capacitors in an inverter system including a smoothing
unit configured with the first and second capacitors which are equivalently connected in series to each other, comprising:
first and second resistors connected in series to each other, wherein the serial connection of the first and second resistors
is connected in parallel to the smoothing unit;

a switching unit connected to a node (a reference point) between the first and second resistors and a node (a neutral point)
between the first and second capacitors and configured to short and open between the reference point and the neutral point;

a control unit configured to control the switching unit to short between the reference point and the neutral point when a
voltage of the reference point (a reference point voltage) and a voltage of the neutral point (a neutral point voltage) are
different from each other; and

a voltage measuring element connected between the reference point and the neutral point.

US Pat. No. 9,812,998

METHOD FOR CONTROLLING INVERTER

LSIS CO., LTD., Gyeonggi...

1. A method for controlling an inverter driven with an input power, to speed up residual energy discharge at the inverter
when a safety signal is input to the inverter, the method comprising:
determining whether the safety signal is input to the inverter;
generating an I/O failure output relay signal to interrupt the input power if it is determined that the safety signal is input;
and

performing a process of discharging residual energy at a smoothing stage of the inverter and fan drive,wherein when the inverter performs current control, the process of discharging the residual energy comprises:
performing a DC excitation process;
determining whether a low voltage trip occurs in the inverter; and
determining whether a voltage of the smoothing stage of the inverter is less than a predetermined voltage.

US Pat. No. 9,653,921

BATTERY DEVICE AND ENERGY STORAGE SYSTEM INCLUDING THE SAME

LSIS CO., LTD., Anyang-s...

1. A battery device comprising:
a case;
an electric power terminal formed on one side of the case;
a plurality of partitions forming a plurality accommodation spaces in the case;
a plurality of battery unit modules including a plurality of battery modules connected in series, each of the plurality of
battery modules including a plurality of battery cells connected in series or in parallel;

a plurality of unit module mounting portions formed within the case, each configured to detachably accommodate one of the
plurality of battery unit modules; and

a plurality of switch mounting portions, each formed between the electric power terminal and one of the plurality of unit
module mounting portions and including a switch configured to establish a connection between the electric power terminal and
a corresponding unit module mounting portion,

wherein one of the plurality of unit module mounting portions and the corresponding switch mounting portion are arranged in
each of the plurality of accommodation spaces, and

wherein each of the plurality of unit module mounting portions and the corresponding switch mounting portion are separated
from other of the plurality of unit module mounting portions and the corresponding switch mounting portions by one of the
plurality of partitions.

US Pat. No. 9,614,455

HIGH VOLTAGE DIRECT CURRENT TRANSMISSION SYSTEM AND CONTROL METHOD THEREOF

LSIS CO., LTD., Anyang-s...

1. A high voltage direct current (HVDC) transmission system comprising:
a rectifier configured to convert alternating current (AC) power into direct current (DC) power;
an inverter configured to convert the DC power into the AC power;
a DC transmission line configured to transmit, to the inverter, the DC power obtained through conversion by the rectifier;
a first active power measurement unit configured to measure first active power input to the rectifier;
a second active power measurement unit configured to measure second active power output from the inverter; and
a first control unit configured to:
determine a ratio of the second active power to the first active power; and
detect an abnormal voltage state on the DC transmission line when the determined ratio is out of a threshold ratio range.

US Pat. No. 9,533,593

CHARGER FOR ELECTRIC VEHICLE

LSIS CO., LTD., Anyang-s...

1. A charger for an electric vehicle, the charger comprising:
a light emitting unit emitting visible light and displaying charging operation information of the charger;
a communication unit performing near-field wireless communication with an external device;
a guide guiding the visible light emitted by the light emitting unit; and
a control unit controlling operations of the light emitting unit and the communication unit,
wherein the communication unit comprises a transmitting device transmitting electromagnetic waves for the near-field wireless
communication and a receiving device receiving electromagnetic waves for the near-field wireless communication,

wherein the guide guides the electromagnetic waves for the near-field wireless communication that are emitted from the transmitting
device of the communication unit or received by the receiving device of the communication unit,

wherein the guide comprises:
a reflective layer surrounding an external portion of the guide and reflecting the emitted visible light toward an inside
portion of the guide;

a first guide part that extends vertically and has a lower end that is located above the transmitting device or receiving
device of the communication unit;

a connection part that extends and is inclined upward from an upper end of the first guide part;
a second guide part that is located above the light emitting unit and extends upward from the connection part;
a first light entrance provided in a lower portion of the first guide part;
a second light entrance provided in a lower portion of the second guide part; and
a third light entrance provided in an upper portion of the second guide part,
wherein the reflective layer of the guide is not provided on the first light entrance, the second light entrance or the third
light entrance.

US Pat. No. 9,535,436

CONTROL DEVICE FOR HYBRID ELECTRIC POWER SYSTEM

LSIS CO., LTD., Anyang-s...

1. A electric power control device for a hybrid electric power system, the device comprising:
an electric power measuring unit configured to measure output electric power of the electric power system; and
a controller configured to:
control operations of a first electric power generator and a second electric power generator of the electric power system
based on a preset control mode and the measured output electric power;

control an output voltage of the first electric power generator to be a first offset voltage corresponding to an output of
the second electric power generator for a first time duration when the output of the second electric power generator is controlled
to switch from an ON state to an OFF state; and

control the output voltage of the first electric power generator to be a second offset voltage corresponding to the output
of the second electric power generator for a second time duration when the output of the second electric power generator is
controlled to switch from the OFF state to the ON state.

US Pat. No. 9,499,060

POWER CONVERSION DEVICE

LSIS CO., LTD., Anyang-s...

1. A power conversion device for charging first and second batteries, the power conversion device comprising:
an input unit converting externally supplied commercial alternating current (AC) power into direct current (DC) power to output
the converted DC power;

a first power conversion unit converting the DC power converted by the input unit into AC power to output the converted AC
power;

a second power conversion unit converting the AC power converted by the first power conversion unit into DC power to charge
the first battery in a first operation mode and converting the DC power output by the first battery into AC power in a second
operation mode;

a third power conversion unit converting the AC power converted by the second power conversion unit into DC power to charge
the second battery in the second operation mode; and

a switching unit connecting the first power conversion unit to the second power conversion unit according to an externally
supplied control signal in the first operation mode and connecting the second power conversion unit to the third power conversion
unit according to the externally supplied control signal in the second operation mode.

US Pat. No. 9,405,554

METHOD FOR INITIALIZING EXPENDED MODULES IN PROGRAMMABLE LOGIC CONTROLLER SYSTEM

LSIS CO., LTD., Anyang-S...

1. A method for initializing expended modules in a PLC (Programmable Logic Controller) system, the method comprising:
performing an initialization operation after generating, by a basic unit, an initialization request signal and transmitting
the initialization request signal to a plurality of expended modules sequentially connected to the basic unit; and

determining, by the basic unit, that the initialization operation is complete when an initialization completion signal is
received,

wherein performing the initialization operation includes a first of the plurality of expended modules receiving the initialization
request signal from the basic unit and transmitting the initialization request signal to a next subsequent one of the plurality
of expended modules and each of the next subsequent plurality of expended modules transmitting the request signal to a next
subsequent one of the plurality of expended modules until the initialization request signal is received by a last of the plurality
of expended modules, and

wherein determining that the initialization operation is complete includes the last of the plurality of expended modules generating
an initialization completion signal upon completing its initialization and transmitting the generated initialization completion
signal to a next previous one of the plurality of expended modules and each of the next previous plurality of expended modules
generating and transmitting an initialization completion signal to a next previous one of the plurality of expended modules
upon completing its initialization until the first of the plurality of expended modules receives an initialization completion
signal from a second of the plurality of expended module and generates and transmits an initialization completion signal to
the basic unit upon completing its initialization.

US Pat. No. 9,287,933

APPARATUS FOR POWER LINE COMMUNICATION

LSIS Co., Ltd., Anyang-S...

1. An apparatus for three-phase power line communication, the apparatus comprising:
a connector connected to each phase of a three-phase power line, so that a communication signal transmitted to a communication
target device provided to each phase is transferred thereto; and

a controller configured to output the communication signal and control the connector,
wherein the connector includes:
a coupling transformer configured to convert the communication signal output from the controller into a form capable of being
transferred to the three-phase power line; and

a coupling capacitor configured to convert the communication signal into a form capable of being transferred to each phase,
wherein the controller is further configured to control the connector such that the communication signal is selectively transmitted
to at least one phase of each phase of the three-phase power line, and

wherein the controller includes a zero cross detector configured to detect a phase of each phase using a zero cross principle.

US Pat. No. 9,147,538

ELECTRONIC SWITCH

LSIS Co., Ltd., Anyang-S...

1. An electronic switch comprising:
a fixed contact point;
a movable contact point movable between a first position making contact with the fixed contact point and a second position
separated from the fixed contact point; and

an actuating unit configured to move the movable contact point between the first position and the second position;
wherein a plurality of gas inflow spaces are symmetrically disposed about a center point at a surface of the fixed contact
point facing the movable contact point;

wherein a gas is injected into a space defined by a housing where the fixed and movable contact points make contact with each
other and the gas flows into the plurality of gas inflow spaces and an internal pressure of the gas in the plurality of gas
inflow spaces is increased when the fixed and movable contact points make contact with each other;

wherein the gas in the plurality of gas inflow spaces is exhausted to the space defined by the housing and the movable contact
is moved away from the fixed contact point by the gas exhausted to the space defined by the housing when the fixed and movable
contact points are separated from each other; and

wherein the plurality of gas inflow spaces are concave with respect to the surface of the fixed contact point.

US Pat. No. 9,076,620

ELECTROMAGNETIC SWITCHING DEVICE

LSIS Co., Ltd., Anyang-S...

1. An electromagnetic switching device comprising:
a shaft coupled with a movable contact point such that the shaft moves up and down, the shaft comprising a large diameter
portion and a small diameter portion below the large diameter portion;

an elastic member coupled with a bottom end of the shaft and having an asymmetric bottom surface;
a fixed core surrounding an outer side of the shaft, the fixed core comprising an upper fixed core that surrounds an outer
side of the large diameter portion of the shaft and a lower fixed core vertically spaced apart from the upper fixed core;
and

a movable core at an outer side of the small diameter portion of and coupled with the outer side of the shaft,
wherein a vertical volume of the elastic member expands as temperature is increased.

US Pat. No. 10,032,587

DIRECT CURRENT RELAY

LSIS CO., LTD., Anyang-s...

1. A DC relay comprising:a pair of fixed contacts fixedly disposed on one side of a frame;
a movable contact movably disposed below the pair of fixed contacts and configured to be brought into contact with the pair of fixed contacts or separated therefrom;
an insulating plate disposed below the movable contact;
a contact spring disposed between the movable contact and the insulating plate;
a plate disposed below the insulating plate and including a through hole formed in a central portion thereof;
a fixed core inserted from above the plate through the through hole and including a shaft hole disposed at the center thereof;
an anti-noise pad disposed between the fixed core and the insulating plate;
a movable core configured to be linearly movable below the fixed core; and
a shaft configured to penetrate through the through hole and including an upper end fixed to the movable contact and a lower end coupled to the movable core,
wherein an installation recess allowing the anti-noise pad to be partially inserted therein is formed below the insulating plate,
wherein a height of the anti-noise pad is formed to be longer than a depth of the installation recess,
wherein the anti-noise pad is formed to have an area larger than an upper surface of the fixed core, and
wherein the anti-noise pad is formed of dual materials, an upper portion of the anti-noise pad is formed of hard rubber and a lower portion of the anti-noise pad is formed of soft rubber.

US Pat. No. 9,813,066

PLC HIGH SPEED COUNTER AND OPERATING METHOD THEREOF

LSIS CO., LTD., Gyeonggi...

1. An operating method of a programmable logic controller (PLC) high speed counter configured to count a pulse and transmit
a generated count value to an external device, the method comprising:
counting, when the pulse is input, the pulse in a linear count manner and generating a count value;
storing the count value in a buffer as a current linear count value;
determining, when a current value request is input from the external device, a mode of the PLC high speed counter; and
transmitting, when the mode of the PLC high speed counter is determined to be a ring counter mode as a result of the determining,
a current ring count value to the external device,

wherein the current ring count value is calculated by the following

wherein RINGMAX denotes a maximum ring count value, RINGMIN denotes a minimum ring count value, and FLOOR( )denotes a FLOOR function.

US Pat. No. 9,685,899

INVERTER FOR SUPPLYING LOAD-ADAPTIVE BOOST VOLTAGE

LSIS CO., LTD., Anyang-s...

1. An inverter which supplies a load-adaptive boost voltage and drives an induction motor, the inverter comprising:
a reference voltage determining unit configured to determine a reference voltage according to a reference frequency on the
basis of a predetermined a relationship between a voltage and a frequency;

an inverter unit configured to drive the induction motor according to the reference voltage; and
an automatic torque boost voltage calculation unit configured to determine an automatic torque boost voltage value according
to a magnitude of an output current from the inverter to the induction motor, wherein the reference voltage determining unit
adds a preset manual boost voltage value and an automatic torque boost voltage value to the reference voltage and outputs
the resultant voltage value as a final reference voltage.

US Pat. No. 9,499,058

ELECTRIC CHARGING APPARATUS AND OPERATION METHOD THEREOF

LSIS CO., LTD., Anyang-s...

1. An electric charging apparatus comprising:
a ground determination signal generating unit measuring a current signal or voltage signal that is generated from power applied
from a power supply unit, the ground determination signal generating unit generating a signal for determining whether the
power supply unit is normally grounded on the basis of the current or voltage signal;

a power control unit generating a power control signal on the basis of a ground determination detecting signal generated from
the ground determination signal generating unit; and

a power cutoff unit cutting power supply to a target device to be charged on the basis of the power control signal;
wherein the ground determination signal generating unit comprises a transformer transforming the generated voltage on the
basis of the power applied from the power supply unit and a resistor,

wherein the ground determination signal generating unit generates the ground determination detecting signal on the basis of
the current signal flowing in the resistor or the voltage signal applied to the resistor,

wherein the transformer has a primary coil of which one end is connected to a first line L of the power supply unit, and the
other end is connected to a second line PE of the power supply unit and a secondary coil of which one end is grounded, and
the other end is connected to one end of the resistor and the ground determination part,

wherein the power cutoff unit comprises a plurality of relays, and
the power to be supplied to the target device to be charged is controlled by on/off operations of the plurality of relays.

US Pat. No. 9,331,595

MULTI-LEVEL INVERTER

LSIS CO., LTD., Anyang-s...

1. A multi-level inverter comprising:
a rectifying unit configured to receive a phase voltage from a 3-phase power source and provide a rectified voltage;
a smoothing unit configured to receive the rectified voltage and provide the received rectified voltage as voltages having
different levels to first to third nodes; and

an inverter unit including a plurality of switch units to transmit the voltages having three levels provided from the smoothing
unit to a load,

wherein the inverter unit includes a first switch unit provided between the first node and a first output terminal, second
switch units provided between the second node and the first output terminal, a third switch unit provided between the third
node and the first output terminal, a fourth switch unit provided between the first node and a second output terminal, a fifth
switch unit provided between the second node and the second output terminal, and a sixth switch unit provided between the
third node and the second output terminal;

wherein the first switch unit comprises:
a first diode having directivity of a current from the first output terminal to the first node; and
a first power semiconductor having a current flow in the opposite direction of the first diode and connecting one side and
the other side of the first diode,

wherein the third switch unit comprises:
a second diode having directivity of a current from the third node to the first output terminal; and
a second power semiconductor having a current flow in the opposite direction of the second diode and connecting one side and
the other side of the second diode,

wherein the fifth switch unit comprises:
a first diode having directivity of a current from the second node to the second output terminal;
a first power semiconductor having a current flow in the opposite direction of the first diode and connecting one side and
the other side of the first diode;

a second diode having a current flow in the opposite direction of the first diode and connected to the first diode in series;
and

a second power semiconductor having a current flow in the opposite direction of the first power semiconductor and connecting
one side and the other side of the second diode, and

wherein the cathode of the first diode and the cathode of the second diode in the fifth switch unit are directly connected
to each other.