US Pat. No. 9,398,726

HEAT-DISSIPATING BASE AND ELECTRONIC DEVICE

DELTA ELECTRONICS (SHANGH...

1. A heat-dissipating base, comprising:
a main body;
at least one first protrusion disposed on the main body, wherein the at least one first protrusion has at least one first
protrusion top surface for thermally contacting at least one first component above the main body; and

at least one second protrusion disposed on the main body, wherein the at least one second protrusion has at least one second
protrusion side surface for thermally contacting at least one second component above the main body, an accommodation trough
is formed by the second protrusion and the second protrusion side surface of the second protrusion thermally contacts the
second component disposed in the accommodation trough.

US Pat. No. 9,148,984

HIGH-POWER ELECTROMAGNETIC ASSEMBLY

DELTA ELECTRONICS (SHANGH...

1. A high-power electromagnetic assembly, comprising a coil having at least two coil layers, wherein a heat sink is provided
between adjacent coil layers to aid dissipating heat from the coil, an air channel is formed inside the heat sink along its
longitudinal direction, the air channel is also provided between two adjacent coil layers to aid dissipating heat from the
coil, and the longitudinal direction of the air channel of the heat sink is substantially consistent with an axial direction
of the coil.

US Pat. No. 9,414,480

POWER CONVERSION DEVICE AND POWER CONVERSION ASSEMBLY

DELTA ELECTRONICS (SHANGH...

1. A power conversion device, comprising:
a printed wiring board assembly, comprising:
a printed circuit board having a plurality of through holes; and
a plurality of electronic components disposed on the printed circuit board;
a grounding member; and
a plurality of insulating struts corresponding to the through holes and physically connecting and electrically insulating
the printed circuit board and the grounding member, wherein each of the insulating struts comprises a first connecting part,
a second connecting part, and a plastic part partially covering the first connecting part and the second connecting part,
and the first connecting part and the second connecting part are separated by the plastic part.

US Pat. No. 9,523,739

METHOD AND APPARATUS FOR MEASURING ROTOR RESISTANCE OF INDUCTION MOTOR

DELTA ELECTRONICS (SHANGH...

1. A method for measuring a rotor resistance of an induction motor, comprising:
injecting a first voltage step signal into a test phase of the induction motor when the induction motor is at standstill;
measuring and recording a current value I0+ at an initial moment of the first voltage step signal, a first current value Is1 and a second current value Is2, the first current value Is1 being equal to a steady-state current value corresponding to a voltage value before a step of the first voltage step signal,
and the second current value Is2 being equal to a steady-state current value corresponding to a voltage value after the step of the first voltage step signal;
and

calculating the rotor resistance Rr of the induction motor based on the first current value Is1, the second current value Is2 and the current value I0+ at the initial moment,

wherein the rotor resistance Rr is calculated according to an equation


 in which Rs represents a stator resistance,

wherein the induction motor is a three-phase induction motor, and the method further comprises controlling the three-phase
induction motor at standstill,

wherein the controlling the three-phase induction motor at standstill comprises:
setting a voltage input to the test phase of the three-phase induction motor twice as large as a voltage input to the other
two phases while setting a direction of the voltage input to the test phase opposite to that of the voltage input to the other
two phases; or setting the voltage input to the test phase of the three-phase induction motor equal to a voltage input to
one phase of the other two phases while setting the direction of the voltage input to the test phase opposite to that of the
voltage input to the one phase, and no voltage is supplied to a remaining phase of the other two phases; or

setting a current input to the test phase of the three-phase induction motor twice as large as a current input to the other
two phases while setting a direction of the current input to the test phase opposite to that of the current input to the other
two phases; or setting the current input to the test phase of the three-phase induction motor equal to a current input to
one phase of the other two phases while setting the direction of the current input to the test phase opposite to that of the
current input to the one phase, and no current is supplied to a remaining one phase of the other two phases.

US Pat. No. 9,129,736

TRANSFORMER CAPABLE OF SUPPRESSING COMMON MODE CURRENT AND POWER CONVERTER THEREOF

DELTA ELECTRONICS (SHANGH...

1. A transformer capable of suppressing a common mode current, comprising:
a primary winding coupled to a primary side of the transformer;
a secondary winding coupled to a secondary side of the transformer;
a magnet core; and
a shielding winding layer comprising a first shielding winding and a second shielding winding, wherein both the first shielding
winding and the second shielding winding are coupled to the primary side or the secondary side, and the shielding winding
layer is arranged between the primary winding and the secondary winding, and the first shielding winding comprises a first
jump terminal and a first static terminal, and the second shielding winding comprises a second jump terminal and a second
static terminal, and a voltage jump direction of the first jump terminal of the first shielding winding is constantly opposite
to that of the second jump terminal of the second shielding winding,

wherein the first static terminal and the second static terminal are coupled to a static terminal that is coupled with the
primary winding or the secondary winding, and the first jump terminal and the second jump terminal are not connected together.

US Pat. No. 9,231,406

MID-VOLTAGE VARIABLE-FREQUENCY DRIVING SYSTEM AND TOTAL HARMONIC DISTORTION COMPENSATION CONTROL METHOD

DELTA ELECTRONICS (SHANGH...

34. A total harmonic distortion compensation control method for a mid-voltage variable-frequency driving system comprising
a three-phase switch-mode rectifier module, a three-phase electrical grid, a controller and a total harmonic distortion compensation
unit, wherein the three-phase switch-mode rectifier module is coupled to the three-phase electrical grid, and the controller
is coupled to the three-phase switch-mode rectifier module, and the total harmonic distortion compensation unit is coupled
to the controller, and the total harmonic distortion compensation control method comprises: inputting a initial reactive component
reference value into the total harmonic distortion compensation unit, wherein the total harmonic distortion compensation unit
adjusts the initial reactive component reference value to generate a reactive component reference value; and controlling each
single-phase rectifier circuit of the three-phase switch-mode rectifier module through the controller according to the final
reactive component reference value generated by the total harmonic distortion compensation unit, thus adjusting a phase angle
difference of the three-phase switch-mode rectifier module, thereby adjusting a power factor corresponding to the three-phase
electrical grid and eliminating a current total harmonic distortion corresponding to the three-phase electrical grid; wherein
the phase angle difference exists between a fundamental component of a rectifier AC-side phase current and a fundamental component
of a rectifier AC-side phase voltage, between a fundamental component of a grid-side phase current and a fundamental component
of a rectifier AC-side phase voltage, or between a fundamental component of a grid-side phase current and a fundamental component
of a grid-side phase voltage.

US Pat. No. 9,077,180

PHASE LOCKING SYSTEM FOR THREE-PHASE ALTERNATING CURRENT ELECTRIC GRID AND METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A phase locking system for a three-phase alternating current (AC) electric grid, comprising:
an input module, for receiving three-phase voltages of the three-phase AC electric grid and converting the three-phase voltages
to two-way voltages Vgrid? and Vgrid?, each of which comprising a positive sequence component and a negative sequence component;

a first separation module, for obtaining a positive sequence component dpos at a d-axis and a positive sequence component qpos at a q-axis by performing a coordinate transformation from a ?-? coordinate system to a d-q coordinate system on a first variable
to be separated, and next outputting positive sequence components V?pos and V?pos corresponding to the voltage of each way by performing the coordinate transformation from the d-q coordinate system to the
?-? coordinate system on the positive sequence component dpos at the d-axis; and

a second separation module, for outputting negative sequence components V?neg and V?neg corresponding to the voltage of each way by performing the coordinate transformation from the ?-? coordinate system to the
d-q coordinate system and then the coordinate transformation from the d-q coordinate system to the ?-? coordinate system on
a second variable to be separated;

wherein the first separation module and the second separation module are coupled as a closed loop feedback, the second separation
module obtains the negative sequence component by adopting a closed loop compensation, and eliminates an error in the first
separation module, making the first separation module separate out the positive sequence component for phase locking.

US Pat. No. 9,166,489

LAYOUTS OF MULTIPLE TRANSFORMERS AND MULTIPLE RECTIFIERS OF INTERLEAVING CONVERTER

Delta Electronics (Shangh...

1. A layout of a converter circuit, comprising:
a main board;
a first sub-board; and
a second sub-board;
wherein the converter circuit having a first output and a second output comprises:
a first converter and a second converter, each converter comprising:
(a) a switch network circuit;
(b) a first transformer and a second transformer, each transformer having a primary winding and at least one secondary winding,
wherein the switch network circuit and the primary windings of the first and second transformers are electrically connected
to each other; and

(c) a first rectifier and a second rectifier electrically coupled to the secondary windings of the first transformer and the
second transformer, respectively, each rectifier having a first output and a second output,

wherein the first and second outputs of the first rectifiers of the first and second converters are electrically parallel-connected
to a first output capacitor that is electrically connected between the first and second outputs of the converter circuit;
and

wherein the first and second outputs of the second rectifiers of the first and second converters are electrically parallel-connected
to a second output capacitor that is electrically connected between the first and second outputs of the converter circuit;

wherein the first sub-board is configured with the first rectifiers of the first and second converters and the first output
capacitor which are disposed on the same side of the first sub-board, the first rectifiers of the first and second converters
are symmetric about the first output capacitor on the first sub-board to make the distances from the first output capacitor
to the two first rectifiers respectively are close;

wherein the second sub-board is configured with the second rectifiers of the first and second converters and the second output
capacitor which are disposed on the same side of the second sub-board, the second rectifiers of the first and second converters
are symmetric about the second capacitor on the second sub-board to make the distances from the second output capacitor to
the two second rectifiers respectively are close;

wherein the first sub-board and a second sub-board are perpendicular to the main board.

US Pat. No. 9,263,939

CAPACITOR DISCHARGING CIRCUIT AND CONVERTER

Delta Electronics (Shangh...

1. A converter, comprising:
a capacitor connected between a live line and a null line of AC power input terminals;
a conversion module coupled to the capacitor and at least comprising an energy transfer unit and an energy storage component,
wherein, the energy transfer unit, comprising a switching device, is coupled to the capacitor and the energy storage component;

an AC power-off detecting unit connected with the AC power input terminals, which detects on-off status of AC power and generates
an AC power-off signal; and

a control unit coupled to the AC power-off detecting unit; wherein when disconnection of the AC power is detected by the AC
power-off detecting unit, the AC power-off signal outputted from the AC power-off detecting unit triggers the control unit
to output a switch driving signal, which controls operation of the energy transfer unit to transfer energy stored in the capacitor
to the energy storage component, so that the capacitor is discharged;

wherein the control unit comprises an intervention unit, a feedback regulation unit and a switching signal generation unit,
wherein, the feedback regulation unit comprises a feedback voltage sampling unit, a reference voltage generation unit and
a regulation unit; when the AC power is disconnected, the intervention unit intervenes to increase output voltage of the feedback
regulation unit by decreasing feedback voltage received by the feedback regulation unit or increasing output voltage of the
reference voltage generation unit, such that the switching signal generation unit generates a switch driving signal according
to the output voltage of the feedback regulation unit, so as to control the operation of the switching device of the conversion
module to transfer the energy stored in the capacitor to the energy storage component of the conversion module, and to discharge
the capacitor.

US Pat. No. 9,111,928

SWITCH CIRCUIT PACKAGE MODULE

DELTA ELECTRONICS (SHANGH...

13. A switch circuit package module comprising:
a substrate;
a semiconductor switch unit comprising a plurality of first and second switch conductive electrodes disposed on an upper surface
of the substrate, wherein the first switch conductive electrodes are arranged alternately with the second switch conductive
electrodes; and

a capacitor unit disposed on an upper surface of the semiconductor switch unit, and electrically and physically contacted
with the semiconductor switch unit, wherein the semiconductor switch unit is interposed between substrate and the capacitor
unit, and wherein the capacitor unit comprises a plurality of capacitors, and each of the capacitors overlaps portions of
a pair of adjacent first and second switch conductive electrodes;

wherein a commutation loop is formed by each of the capacitors and a pair of adjacent switch conductive electrodes that said
each of the capacitors partially overlaps, and wherein impedances of all of the commutation loops are close to or the same
as each other.

US Pat. No. 9,468,120

HOUSING, BOBBIN, AND ELECTRONIC DEVICE

DELTA ELECTRONICS (SHANGH...

1. A housing for at least partially covering an electronic component, the housing comprising:
a body having a first surface and a second surface connected to the first surface, wherein a normal direction of the first
surface and a normal direction of the second surface are interlaced with each other, the body having a notch therein;

at least one first coupling portion disposed on the first surface, configured for being detachably coupled with at least one
second coupling portion of at least one terminal of the electronic component, such that degrees of freedom in a first direction
and a second direction of the terminal are restricted; and

at least one third coupling portion disposed on the second surface, configured for being detachably coupled with at least
one fourth coupling portion of the terminal, such that a degree of freedom in a third direction of the terminal is restricted,
wherein the first direction, the second direction, and the third direction are linearly independent;

a connected member having a through hole therein;
a nut accommodated in the notch, wherein the nut has a tapped hole therein; and
a screw passing the through hole of the connected member and a through hole of the terminal and coupled with the nut.

US Pat. No. 9,281,117

MAGNETIC CORE STRUCTURE AND ELECTRIC REACTOR

Delta Electronics (Shangh...

1. An electric reactor, comprising:
a magnetic core structure and at least one winding,
wherein the magnetic core structure comprising:
an upper cover plate and a lower cover plate which are arranged oppositely; and
at least one wrapping post having two ends connected to the upper cover plate and the lower cover plate, respectively,
wherein a cross-sectional area of the upper cover plate and/or a cross section area of the lower cover plate is larger than
a cross-sectional area of the wrapping post, and the upper cover plate, the lower cover plate and the wrapping post are made
of a magnetic powder core material, an amorphous material, a nanocrystalline material or a silicon steel material,

wherein a thickness of the upper cover plate or a thickness of the lower cover plate is larger than a thickness of the wrapping
post, and

wherein a flat metallic wire is used for the winding in a vertical winding manner.

US Pat. No. 9,071,026

ENERGY-SAVING CONTROL DEVICE AND ENERGY-SAVING CONTROL METHOD AND POWER ADAPTER INCLUDING THE SAME

DELTA ELECTRONICS (SHANGH...

1. An energy-saving control device applicable to a power adapter, comprising:
a mechanical switch set on a cable interface of the power adapter, wherein the mechanical switch has a first end and a second
end, and the second end is an output end of the mechanical switch;

a controller having an input terminal and an output terminal, wherein the input terminal of the controller is connected to
the output end of the mechanical switch, and the output terminal of the controller outputs a switching control signal; and

a power converter connected to the output terminal of the controller for receiving the switching control signal from the controller,
wherein the power converter is operated according to the switching control signal,

wherein when a connection cable is plugged into the cable interface, the mechanical switch outputs a first signal to the controller,
and the controller outputs a first switching control signal corresponding to the first signal to control the power converter
to be operated at a normal mode; and when a connection cable is removed from the cable interface, the mechanical switch outputs
a second signal to the controller, and the controller outputs a second switching control signal corresponding to the second
signal to control the power converter to be operated at a hiccup mode.

US Pat. No. 9,236,807

DC/DC CONVERTER, POWER CONVERTER AND CONTROL METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A DC/DC converter comprising:
an output circuit having a load;
a rectangular wave generator comprising switches for converting an input direct current (DC) voltage into at least one rectangular
wave;

a resonant tank for providing a first voltage based on the rectangular wave for the output circuit;
a detection unit for detecting a signal related to a state of the load; and
a control unit outputs control signals to the switches of the rectangular wave generator for controlling a duty ratio of the
rectangular wave outputted by the rectangular wave generator, so that when the state of the load is a light-load or a no-load,
the control signals control the switches of the rectangular wave generator to make the rectangular wave generator work in
a hiccup mode, and the duty ratio of the rectangular wave is within a predetermined range, in which a voltage gain of the
DC/DC converter is greater than another voltage gain under the condition of 50% duty ratio for reduction in the on-off times
of the switches of the rectangular wave generator per unit time.

US Pat. No. 9,131,588

DISCHARGE LAMP SYSTEM AND CONTROLLING METHOD OF THE SAME

DELTA ELECTRONICS (SHANGH...

1. A controlling method for a discharge lamp system, comprising:
determining whether a counted time period is within a time period Tn comprising a first time period ?tn1 and a second time period ?tn2 following the first time period ?tn1, wherein n is an arbitrary positive integer from 1 to N, and N is an integer greater than 1;

outputting a first predetermined voltage Vn1 by a power factor correction circuit when the counted time period is within the first time period ?tn1; and

outputting a second predetermined voltage Vn2 by the power factor correction circuit when the counted time period is within the second time period ?tn2, wherein Vn2
wherein further comprising:
outputting the first predetermined voltage Vi1 by the power factor correction circuit when the counted time period is within the first time period ?ti1 of the time period Tj; and

outputting the first predetermined voltage Vj1 by the power factor correction circuit when the counted time period is within the first time period ?tj1 of the time period Tj;

wherein Vi1?Vj1, i and j are integers from 1 to N, and i?j.

US Pat. No. 9,088,121

PACKAGE MODULE, PACKAGE TERMINAL AND MANUFACTURING METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A package terminal, comprising:
a base;
an end portion with a first section; and
a bent portion having C-shape bend with a gradual change section, wherein the bent portion includes a first end and a second
end, the first end is connected to the end portion, the second end is connected to the base, the bent portion includes a second
section, and an area of the second section is smaller than an area of the first section;

wherein the package terminal has a central axis, the first section and the second section are perpendicular to the central
axis, the first section has a maximum sectional area among all of sections perpendicular to the central axis of the end portion,
and the second section has a minimum sectional area among all of the sections of the bent portion; and

wherein the first section and the second section are round, a diameter of the second section is less than or equal to 0.8
times of a diameter of the first section.

US Pat. No. 9,331,565

SWITCHING POWER CONVERSION CIRCUIT AND POWER SUPPLY USING SAME

DELTA ELECTRONICS (SHANGH...

1. A switching power conversion circuit for receiving the energy of an input voltage and generating an output voltage to a
system circuit, said switching power conversion circuit comprising:
a first-stage power circuit configured to perform a power factor correction and convert said input voltage into a bus voltage,
wherein said first-stage power circuit comprises a first switching circuit;

a first feedback circuit connected to said first-stage power circuit for generating a first feedback signal according to said
bus voltage;

a second-stage power circuit connected to the first-stage power circuit for converting said bus voltage into said output voltage,
wherein said second-stage power circuit comprises a second switching circuit;

a second feedback circuit connected to said second-stage power circuit for generating a second feedback signal according to
said output voltage; and

a controlling unit connected to said first-stage power circuit, said second-stage power circuit, said first feedback circuit,
said second feedback circuit and said system circuit for controlling the operations of said first-stage power circuit according
to said first feedback signal, controlling the operations of said second-stage power circuit according to said second feedback
signal and receiving a power-status signal issued from said system circuit, wherein said controlling unit comprises:

a start-up circuit connected to said system circuit and a power input terminal of said switching power conversion circuit
for converting said input voltage and generating a start-up voltage according to said power-status signal;

a first control circuit connected to said first switching circuit, a first auxiliary power output terminal of said second-stage
power circuit, an output terminal of said first feedback circuit, said system circuit and said start-up circuit, wherein said
first control circuit issues a first pulse width modulation control signal according to said first feedback signal, and said
first switching circuit is conducted or shut off according to said first pulse width modulation control signal; and

a second control circuit connected to said second switching circuit, said first auxiliary power output terminal of said second-stage
power circuit, an output terminal of said second feedback circuit and said first control circuit, wherein said second control
circuit issues a second pulse width modulation control signal according to said second feedback signal, and said second switching
circuit is conducted or shut off according to said second pulse width modulation control signal; and

wherein if said power-status signal is in an off status, said second-stage power circuit is disabled according to said power-status
signal under the control of said controlling unit, thereby said switching power conversion circuit stops providing electrical
energy to said system circuit.

US Pat. No. 9,093,897

INVERTER AND CONTROL METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. An inverter, comprising:
a first bridge leg electrically connected to a direct-current (DC) source, the first bridge leg comprising a first switch,
a second switch, a third switch and a fourth switch and a fifth switch which are sequentially connected in series;

a second bridge leg connected to the first bridge leg in parallel, the second bridge leg comprising a sixth switch, a seventh
switch, an eighth switch, a ninth switch and a tenth switch which are sequentially connected in series;

a first diode connected in anti-parallel with the first switch and the second switch which are connected in series;
a second diode connected in anti-parallel with the fourth switch and the fifth switch which are connected in series;
a third diode connected in anti-parallel with the sixth switch and the seventh switch which are connected in series;
a fourth diode connected in anti-parallel with the ninth switch and the tenth switch which are connected in series;
a cathode of a fifth diode connected to a connection point between the second switch and the third switch and an anode of
the fifth diode connected to a connection point between the eighth switch and the ninth switch; and

a cathode of a sixth diode connected to a connection point between the seventh switch and the eighth switch and an anode of
the sixth diode connected to a connection point between the third switch and the fourth switch.

US Pat. No. 9,081,065

INDUCTANCE MEASURING DEVICE AND METHOD FOR MEASURING AN INDUCTANCE PARAMETER OF PERMANENT MOTOR

DELTA ELECTRONICS (SHANGH...

1. An inductance measuring device for measuring an inductance parameter of a permanent motor, the inductance measuring device
comprising:
a signal conversion unit, for converting a signal corresponding to a d-axis given current signal and a signal corresponding
to a q-axis given current signal into a three-phase command signal, and converting a three-phase feedback signal of the permanent
motor into a d-axis feedback signal and a q-axis feedback signal;

a power conversion unit for receiving the three-phase command signal and outputting a motor control signal corresponding to
the three-phase command signal, so as to obtain the three-phase feedback signal based on the motor control signal; and

a parameter calculation unit, for receiving a first response signal corresponding to the d-axis given current signal, a second
response signal corresponding to the q-axis given current signal, a third response signal corresponding to the d-axis feedback
signal and a fourth response signal corresponding to the q-axis feedback signal, and calculating a d-axis inductance and a
q-axis inductance based on the first, second, third and fourth response signals when the permanent motor is in a stationary
state.

US Pat. No. 9,252,653

POWER FACTOR CORRECTION CONVERTER AND CONTROL METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A power factor correction converter, comprising:
a power conversion module having a first input terminal, a second input terminal, and an output terminal, the first input
terminal and the second input terminal being electrically coupled to an AC power source, the power conversion module comprising
a first switch, a second switch, a first switch unit, a second switch unit, and a power factor correction inductor, the first
switch being electrically coupled to the first input terminal, the second switch being electrically coupled to the second
input terminal, the first switch unit being electrically coupled to the output terminal and the first switch unit and the
first switch being electrically coupled to a first voltage node, the second switch unit being electrically coupled to the
output terminal and the second switch unit and the second switch being electrically coupled to a second voltage node, the
power factor correction inductor being electrically coupled between the first voltage node and the second voltage node;

an output capacitor electrically coupled to the output terminal for generating a DC output voltage;
a third switch unit electrically coupled between the second input terminal and the output capacitor; and
a fourth switch unit electrically coupled between the first input terminal and the output capacitor.

US Pat. No. 9,257,929

EXCITATION CONTROL CIRCUIT, CONTROL METHOD AND ELECTRICALLY EXCITED WIND POWER SYSTEM HAVING THE SAME

DELTA ELECTRONICS (SHANGH...

1. An excitation control circuit for an electrically excited wind power system, comprising:
at least one converter arranged between an AC electric grid and a wind power generator so as to convert AC power generated
by the wind power generator into AC power corresponding to the AC electric grid; and

at least one AC/DC conversion module having an input side and an output side, where the input side of the AC/DC conversion
module is electrically connected between the converter and the wind power generator, the output side of the AC/DC conversion
module is coupled to an excitation device, and the AC/DC conversion module is used to convert the AC power generated by the
wind power generator into a DC voltage so as to provide the excitation current of the wind power generator through the DC
voltage,

wherein
the AC/DC conversion module comprises a rectifier circuit and a DC/DC converter,
the DC/DC converter is used to perform DC/DC conversion of the rectifier voltage outputted by the rectifier circuit, and
a buffer unit comprising a buffer resistance and a switch connected in parallel is arranged between the rectifier circuit
and the DC/DC converter.

US Pat. No. 9,136,201

HYBRID HEAT SINK AND HYBRID HEAT SINK ASSEMBLY FOR POWER MODULE

DELTA ELECTRONICS (SHANGH...

1. A hybrid heat sink assembly for power modules, comprising two hybrid heat sinks provided opposite to each other, each of
the hybrid heat sinks comprising:
a base provided with at least one power module of the power modules on one side thereof;
a first heat dissipation unit as a first heat dissipation fin group which is composed of a first plurality of heat dissipation
fins intervally arranged and is located on another side of the base; and

a second heat dissipation unit comprising a plurality of heat pipes and a second heat dissipation fin group, each of the heat
pipes comprising an evaporating section provided in the base and adjacent to the at least one power module, a condensing section,
and an adiabatic section located between the evaporating section and the condensing section, the adiabatic section comprising
an extension portion extending upwardly from a distal end of the evaporating section and a folding portion folded from a distal
end of the extension portion, and the second heat dissipation fin group being provided on each condensing section of the heat
pipes and being composed of a second plurality of heat dissipation fins;

wherein the first heat dissipation fin group of a first one of the two hybrid heat sinks is provided in parallel to the first
heat dissipation fin group of a second one of the two hybrid heat sinks, each first heat dissipation fin group of the first
one of the two hybrid heat sinks adjacent to the first heat dissipation fin group of the second one of the two hybrid heat
sinks, the first heat dissipation fin group located at an inner side of the respective base, and an interval distance between
each condensing section of all the heat pipes within one of the first one and the second one of the two hybrid heat sinks
and the first heat dissipation fin group in the one of the first one and the second one of the hybrid heat sinks is larger
than an interval distance between each condensing section of all the heat pipes within another of the first one and the second
one of the hybrid heat sinks and the first heat dissipation fin group in the another of the first one and the second one of
the hybrid heat sinks.

US Pat. No. 9,435,864

APPARATUS FOR MEASURING EXCITATION PARAMETERS OF INDUCTION MOTOR AND METHOD THEREOF

Delta Electronics (Shangh...

1. An apparatus for measuring excitation parameters of an induction motor, comprising: a control unit, a power converter,
and an excitation parameter calculating unit, wherein:
the power converter is for providing a test current to a test phase of the induction motor, and an output of the power converter
maintains the induction motor static;

the control unit is equipped with a current instruction for indicating the test current, and the control unit is for regulating
the test current provided by the power converter to be equivalent to the current instruction, meanwhile controlling the output
of the power converter to maintain the induction motor static; and

the excitation parameter calculating unit is for receiving a voltage signal of a test phase of the induction motor and a current
signal of the test phase of the induction motor to calculate the excitation parameters.

US Pat. No. 9,140,744

DOUBLY-FED INDUCTION GENERATOR SYSTEM AND THE SELF-TEST METHOD FOR THE ACTIVE CROWBAR CIRCUIT THEREOF

DELTA ELECTRONICS (SHANGH...

1. A self-test method for an active crowbar circuit, wherein the active crowbar circuit is applied to a doubly-fed induction
generator system having a rotor and a rotor-side converter, the method comprising the steps of:
driving the rotor-side converter to turn on to allow the rotor-side converter to control the current of the rotor so as to
maintain a root-mean-square value of the current of the rotor at a predetermined minimum value;

driving the rotor-side converter to turn off and driving the active crowbar circuit to turn on;
determining if the active crowbar circuit can be turned on normally, wherein the current of the rotor is larger than a predetermined
current value within a predetermined time period when the active crowbar circuit is turned on normally;

driving the active crowbar circuit to turn off; and
determining if the active crowbar circuit can be turned off normally, wherein the current of the rotor is smaller than the
predetermined current value within the predetermined time period when the active crowbar circuit is turned off normally.

US Pat. No. 9,661,786

ELECTRONIC DEVICE AND METHOD FOR ASSEMBLING THE SAME

DELTA ELECTRONICS (SHANGH...

1. An electronic device, comprising:
a bottom case comprising a bottom board and a plurality of side walls connected to and surrounding the bottom board;
an accommodation unit disposed on the bottom case;
an electromagnetic induction module, wherein at least one portion of the electromagnetic induction module is disposed in the
accommodation unit;

a heat-dissipating component which is disposed on the bottom case and separated from the accommodation unit, and the heat-dissipating
component facing an inner surface of one of the side walls;

an elastic clip comprising a main body; a fixing portion disposed on the main body and mounted on the heat-dissipating component;
and a pressing portion disposed on the main body;

a printed wiring board having a first surface and a second surface, wherein the first surface faces the accommodation unit;
and

an electronic component comprising a main body and a plurality of pin feet, wherein the pin feet are electrically connected
to the printed wiring board, and the main body of the electronic component is clamped between the heat-dissipating component
and the pressing portion of the elastic clip, wherein a first minimum straight distance between the bottom board and a top
surface of the one of the side walls located away from the bottom board is smaller than a second minimum straight distance
between the bottom board and the fixing portion, and a third minimum straight distance between the elastic clip and the one
of the side walls facing the heat-dissipating component is smaller than a fourth minimum straight distance between the heat-dissipating
component and the one of the side walls facing the heat-dissipating component.

US Pat. No. 9,343,970

CONVERTER AND METHOD FOR REDUCING A VOLTAGE OF NODE THEREOF

DELTA ELECTRONICS (SHANGH...

1. A converter, comprising:
a first transmitting circuit configured to receive a first AC voltage; and
a second transmitting circuit electrically coupled to the first transmitting circuit and configured to generate a second AC
voltage according to the first AC voltage,

wherein one of the first transmitting circuit and the second transmitting circuit comprises at least one divider unit and
the other one of the first transmitting circuit and the second transmitting circuit comprises at least two divider units,
wherein the divider unit includes an inductor network and a capacitor network coupled in series, and wherein the inductor
network and the capacitor network of the adjacent divider units are coupled in series alternately;

wherein the converter further comprising:
a first converting circuit electrically coupled to the first transmitting circuit,
and configured to receive a first DC voltage to generate the first AC voltage;
and a second converting circuit electrically coupled to the second transmitting circuit, and configured to receive the second
AC voltage to generate a second DC voltage,

wherein when a resonant frequency of the first transmitting circuit and the resonant frequency the second transmitting circuit
are both fr, the operating frequency of the first converting circuit or the second converting circuit is set between 0.8×fr
and 1.2×fr, wherein fr is the resonant frequency corresponding to an equivalent leakage inductance and an equivalent capacitor
of the first transmitting circuit or the second transmitting circuit.

US Pat. No. 9,336,943

TRANSFORMER

DELTA ELECTRONICS (SHANGH...

1. A transformer, comprising:
a magnetic core having an axial direction and a radial direction;
a primary winding comprising a plurality of winding sections and at least one connecting section, the plurality of winding
sections being arranged along the axial direction of the magnetic core, the connecting section being connected between the
two adjacent winding sections, each of the winding sections comprising a plurality of primary winding layers and a plurality
of pull-out portions, the primary winding layers surrounding the magnetic core and arranged along the radial direction of
the magnetic core, each of the pull-out portions connecting two of the primary winding layers adjacent to said each of the
pull-out portions, part of normal projections of the primary winding layers on a surface of the magnetic core being located
between normal projections of the pull-out portions on the surface of the magnetic core; and

a plurality of secondary windings surrounding the primary winding and arranged along the axial direction of the magnetic core,
the secondary windings being insulated from each other;

wherein adjacent two of the winding sections define a first gap, adjacent two of the secondary windings define a second gap,
a size of the first gap or a number of the winding sections is determined based on a short-circuit impedance required by the
secondary windings, and a size of the second gap or a number of the secondary windings is determined based on the short-circuit
impedance required by the secondary windings.

US Pat. No. 9,655,288

ELECTRONIC DEVICE AND CAR BATTERY CHARGER

Delta Electronics (Shangh...

1. An electronic device, comprising:
a heat-dissipating base;
a heat-dissipating component disposed on the heat-dissipating base;
a first elastic clip partially mounted on the heat-dissipating component;
a first printed wiring board assembly disposed on or above the heat-dissipating base, the first printed wiring board assembly
comprising:

a first printed wiring board; and
at least one first electronic component disposed on the first printed wiring board, such that the first printed wiring board
assembly has a raised portion and a concave portion relative to the raised portion; and

a second printed wiring board assembly at least partially disposed in the concave portion and disposed between the first printed
wiring board and the heat-dissipating base, the second printed wiring board assembly comprising:

a second printed wiring board; and
at least one switching element disposed on the second printed wiring board, wherein the at least one switching element is
flatly disposed relative to the second printed wiring board, and one end of the switching element is connected to the second
printed wiring board, and the other end of the switching element is clamped between the heat-dissipating component and the
first elastic clip.

US Pat. No. 9,480,111

APPARATUS AND METHOD FOR DRIVING SEMICONDUCTOR LIGHT-EMITTING DEVICE ASSEMBLY

Delta Electronics (Shangh...

1. A driving apparatus for driving a semiconductor light-emitting device assembly, comprising:
a driving unit configured to drive the semiconductor light-emitting device assembly;
a constant-current control unit configured to sample a current average value of the semiconductor light-emitting device assembly
and control the driving unit according to the current average value, and

a cycle by cycle control unit comprising:
a sampling circuit configured to sample a current instantaneous value of the driving unit or the semiconductor light-emitting
device assembly; and

an adjusting circuit configured to adjust an output of the driving unit when the current instantaneous value sampled by the
sampling circuit is not less than a preset reference value,

wherein when the current instantaneous value sampled by the sampling circuit is not less than a preset reference value, the
driving unit is controlled by the constant-current control unit and the cycle by cycle control unit; and

when the current instantaneous value sampled by the sampling circuit is less than the preset reference value, the driving
unit is controlled by the constant-current control unit.

US Pat. No. 9,362,745

POWER STORAGE MODULE AND POWER STORAGE DEVICE

DELTA ELECTRONICS (SHANGH...

1. A power storage module, comprising:
a DC/AC converter,
a first power storage element;
a second power storage element; and
at least one DC/DC converter,
wherein the first power storage element and the second power storage element are coupled to the DC side of the DC/AC converter
to form a first power storage branch and a second power storage branch respectively, wherein the first power storage branch
and the second power storage branch are connected in parallel, and wherein the at least one DC/DC converter is disposed on
the first power storage branch to increase an output impedance of the first power storage branch or disposed on the second
power storage branch to decrease an output impedance of the second power storage branch,

wherein a capacity of the first power storage element is greater than a capacity of the second power storage element, the
first power storage element is a storage cell, and the second power storage element is a super capacitor.

US Pat. No. 9,318,967

DC TO DC CONVERTER AND DC TO DC CONVERSION SYSTEM

DELTA ELECTRONICS (SHANGH...

1. A DC to DC converter, comprising:
a transformer having a transformer core, a primary winding electrically coupled to an output terminal of a primary power circuit
and a secondary winding, wherein the primary power circuit is configured to receive an input voltage and deliver a power flow
having a symmetrical voltage to a secondary side of the transformer during a positive switching cycle and a negative switching
cycle generated on the primary winding, and a magnetic flux in the transformer core is balanced through the power flow having
the symmetrical voltage;

an output inductor;
a secondary bridge synchronous rectifying circuit electrically coupled to the secondary winding of the transformer, comprising:
a first switch having a first end electrically coupled to one end of the output inductor, and a second end electrically coupled
to a first end of the secondary winding;

a second switch having a first end electrically coupled to the second end of the first switch;
a third switch having a first end electrically coupled to the first end of the first switch, and a second end electrically
coupled to a second end of the secondary winding; and

a fourth switch having a first end electrically coupled to the second end of the third switch, and a second end electrically
coupled to a second end of the second switch; and

a control circuit configured to provide a primary driving signal for the primary power circuit and a secondary driving signal
for the secondary bridge synchronous rectifying circuit, respectively, and when an output voltage of the primary power circuit
is zero, the control circuit is configured to control the first switch, the second switch, the third switch and the fourth
switch to be conductive,

wherein the control circuit comprises:
a primary driving circuit configured to output the primary driving signal;
a secondary driving circuit configured to output the secondary driving signal;
an isolation circuit configured to electrically isolate the primary driving circuit from the secondary driving circuit; and
a timing circuit configured to receive a fixed duty cycle signal or a variable duty cycle signal, and arrange a signal timing
between the primary driving signal and the secondary driving signal based on the received fixed duty cycle signal or variable
duty cycle signal.

US Pat. No. 9,484,830

FIVE-LEVEL RECTIFIER

DELTA ELECTRONICS (SHANGH...

1. A five-level rectifier comprising at least one phase bridge arm, the at least one phase bridge arm comprising:
an upper-half bridge arm circuit module comprising a first power semiconductor switch unit, a second power semiconductor switch
unit, a first diode unit, a second diode unit, a first connecting busbar, a first insulated wire and a first transfer busbar,
wherein the first diode unit is connected to the second diode unit in series, a connection point between the first power semiconductor
switch unit and the second power semiconductor switch unit is connected to a positive terminal of a phase capacitor, the first
diode unit is connected to a positive terminal of a first direct-current (DC) bus capacitor, the first connecting busbar is
connected to the first diode unit and the second diode unit, the first transfer busbar is connected to the first power semiconductor
switch unit and the second power semiconductor switch unit, and the first insulated wire is connected to the first transfer
busbar and the first connecting busbar; and

an lower-half bridge arm circuit module comprising a third power semiconductor switch unit, a fourth power semiconductor switch
unit, a third diode unit, a fourth diode unit, a second connecting busbar, a second insulated wire and a second transfer busbar,
wherein the third diode unit is connected to the fourth diode unit in series, a connection point between the third power semiconductor
switch unit and the fourth power semiconductor switch unit is connected to a negative terminal of the phase capacitor, the
fourth diode unit is connected to a negative terminal of a second direct-current (DC) bus capacitor, the second diode unit
and the third diode unit are connected to a neutral point connected between the first DC bus capacitor and the second DC bus
capacitor, the second power semiconductor switch unit and the third power semiconductor switch unit are connected to an alternating-current
terminal, the second connecting busbar is connected to the third diode unit and the fourth diode unit, the second transfer
busbar is connected to the third power semiconductor switch unit and the fourth power semiconductor switch unit, the second
insulated wire is connected to the second connecting busbar and the second transfer busbar, and the upper-half bridge arm
circuit module and the lower-half bridge arm circuit module are disposed side by side and face each other.

US Pat. No. 9,341,696

METHOD, SYSTEM, AND CONTROL APPARATUS FOR SETTING OVER-CURRENT PROTECTION POINT OF ELECTRONIC DEVICE

DELTA ELECTRONICS (SHANGH...

1. A method for setting an over-current protection point of an electronic device, applied in a system for setting the over-current
protection point of said electronic device, said system comprising a parameter auto-test equipment, a first driving signal
generator, and the electronic device, the electronic device comprising an over-current protection module provided with a resistance
adjusting unit, the first driving signal generator being connected with the electronic device, the parameter auto-test equipment
being connected with the first driving signal generator and being provided with an auto-adjustment control unit, the method
comprising:
step 1: the parameter auto-test equipment transmitting a starting signal and outputting a target current for over-current
protection based on the auto-adjustment control unit;

step 2: the first driving signal generator receiving the starting signal and transmitting a driving signal to the over-current
protection module;

step 3: the electronic device receiving the target current for over-current protection, and the over-current protection module
receiving the driving signal and adjusting a resistance of the resistance adjusting unit to the over-current protection point
of the electronic device; and

step 4: the parameter auto-test equipment testing an output of the electronic device based on the auto-adjustment control
unit, wherein the setting of the over-current protection point of the electronic device is successful if the output of the
electronic device is in a predetermined range, while the setting of the over-current protection point of the electronic device
is failure if the output of the electronic device is not in the predetermined range.

US Pat. No. 9,343,975

POWER CONVERTER AND METHOD OF STABLING VOLTAGE GAIN

DELTA ELECTRONICS (SHANGH...

1. A power converter, comprising:
a primary side compensation capacitor configured to receive a first AC voltage from a first switch circuit;
a transformer, comprising a primary winding and a secondary winding, the transformer being configured to receive the first
AC voltage to generate a second AC voltage, and the primary winding of the transformer being electrically coupled to the primary
side compensation capacitor in series; and

a secondary side compensation capacitor electrically coupled to the secondary winding of the transformer in series, and configured
to transmit the second AC voltage to a second switch circuit to generate a DC output voltage,

wherein an operating frequency of the first switch circuit is set between 0.8×fa and 1.2×fb, where the fb is at most 1.5 times
of the fa, and wherein the primary side compensation capacitor and an equivalent primary side leakage inductance of the transformer
correspond to a first resonant frequency, the secondary side compensation capacitor and an equivalent secondary side leakage
inductance of the transformer correspond to a second resonant frequency, the fa is the lower one of the first resonant frequency
and the second resonant frequency, and the fb is the higher one of the first resonant frequency and the second resonant frequency,
so that a voltage gain of the power converter with an empty load is at most 2 times of the voltage gain of the power converter
with a full load.

US Pat. No. 9,338,017

METHOD AND DEVICE FOR CONTROLLING TRANSMITTER

Delta Electronics (Shangh...

1. A method for controlling a transmitter, comprising:
an awaking step of awaking and initiating the transmitter by a trigger signal generated by a timer;
an input control parameter updating step of detecting whether the transmitter receives an input control parameter from outside
of the transmitter, and if yes, updating an input control parameter stored in the transmitter by using the received input
control parameter;

an input control parameter reading step of reading the input control parameter currently stored in the transmitter;
a sensor signal acquiring step of performing operations based on the read input control parameter so as to control the transmitter
to select one sensor signal from a plurality of sensor signals, amplify the selected sensor signal with a gain within a first
gain of a first variable gain amplifier, and output the amplified sensor signal; and

a sleeping step of, after determining that the transmitter has accomplished a task specified by the read input control parameter,
resetting the timer, and entering into a sleeping state until the timer generates the trigger signal.

US Pat. No. 9,312,788

CONTROL DEVICE OF POWER CONVERSION UNIT AND METHOD OF CONTROLLING POWER CONVERSION UNIT

DELTA ELECTRONICS (SHANGH...

1. A control device of a power conversion unit applied to a three-phase AC grid comprising:
a detection unit configured for detecting a three-phase voltage signal of the three-phase AC grid and calculating and generating
a negative sequence reactive current given signal;

a current detection unit configured for detecting a current of the power conversion unit to output a feedback current signal;
and

a signal processing unit configured for receiving the negative sequence reactive current given signal, a positive sequence
current given signal, and the feedback current signal to output a modulation signal;

wherein the power conversion unit is electrically coupled to the signal processing unit and the three-phase AC grid, the power
conversion unit absorbs negative sequence reactive currents from the three-phase AC grid according to the modulation signal
when the three-phase voltage signal is unbalanced so as to reduce a negative sequence voltage at an output terminal of the
power conversion unit.

US Pat. No. 9,641,083

CONTROL DEVICE AND CONTROL METHOD OF POWER CONVERTER AND SWITCHING POWER SUPPLY USING THE SAME

DELTA ELECTRONICS (SHANGH...

1. A control device of a power converter, wherein the power converter comprises a switch unit, wherein the control device
comprises:
a first control unit, which is coupled to the power converter to detect an output voltage of the power converter and is configured
to generate a first control signal based on the output voltage;

a variable resistor unit, which is connected to an output terminal of the first control unit and is configured to generate
a resistance value based on the first control signal; and

a second control unit, which is connected to the variable resistor unit and is configured to output a second control signal
to the switch unit in order to control operations of the switch unit,

wherein the power converter further comprises a transformer, a first terminal of the variable resistor unit is connected to
a primary winding of the transformer, and a second terminal of the variable resistor unit is connected to a first ground terminal.

US Pat. No. 9,401,658

POWER SUPPLY APPARATUS AND METHOD OF GENERATING POWER BY THE SAME

DELTA ELECTRONICS (SHANGH...

1. A power supply apparatus, comprising:
a power source;
a plurality of power converters configured for converting an input power from the power source into conversion powers; and
an output connector configured for receiving the conversion powers from the power converters and outputting one or more output
power corresponding to the conversion powers, wherein at least one of the power converters further comprises:

a converting circuit configured for converting an input voltage corresponding to the input power into a conversion voltage;
a rectifier circuit configured for rectifying the conversation voltage;
an output filler circuit electrically connected across an output of the corresponding power converter, the output filter circuit
configured for filtering the rectified conversation voltage and generating an output voltage; and

an output reverse protection circuit configured for clamping the output voltage to an operation voltage in a condition of
the output voltage being a reverse voltage, wherein the output reverse protection circuit is connected across the output of
the output filter circuit.

US Pat. No. 9,633,919

PACKAGE STRUCTURE WITH AN ELASTOMER WITH LOWER ELASTIC MODULUS

DELTA ELECTRONICS (SHANGH...

1. A package structure, comprising:
a substrate;
at least one electronic component disposed on a first surface of the substrate;
a housing disposed on the first surface of the substrate for covering the first surface of the substrate, wherein the housing
has an accommodation space, and the at least one electronic component is accommodated within the accommodation space;

at least one strut protruded from an inner surface of the housing and extended toward the accommodation space; and
at least one elastomer arranged between the corresponding strut and the substrate, wherein pressure from the corresponding
strut is transmitted to the substrate through the at least one elastomer,

wherein an elastic modulus of the at least one elastomer is lower than 1000 MPa.

US Pat. No. 9,401,356

POWER CIRCUIT, CONTROL METHOD, POWER SYSTEM, AND PACKAGE STRUCTURE OF POWER CIRCUIT

DELTA ELECTRONICS (SHANGH...

1. A power circuit, comprising a first quasi-cascade power unit, the first quasi-cascade power unit comprising:
a normally-on switch, comprising a first end, a second end and a control end;
a normally-off switch, electrically connected to the normally-on switch in series, comprising a first end, a second end and
a control end;

a control unit, comprising a first end, a second end, a third end and a fourth end, wherein the first end of the control unit
is electrically connected to the control end of the normally-off switch, the third end of the control unit is electrically
connected to the control end of the normally-on switch;

a first switch unit, comprising a first end and a second end, wherein the first end of the first switch unit is electrically
connected to the control end of the normally-on switch, the second end of the first switch unit is electrically connected
to the second end of the normally-off switch; and

a second switch unit, comprising a first end and a control end, wherein the control end of the second switch unit is electrically
connected to the second end of the control unit, the first end of the second switch unit is electrically connected to the
second end of the normally-on switch.

US Pat. No. 9,412,510

THREE-PHASE REACTOR

Delta Electronics (Shangh...

1. A three-phase reactor, comprising:
an upper yoke and a lower yoke, the upper yoke and the lower yoke containing a first material; and
at least three first core columns, the first core columns containing a second material, and both ends of each of the first
core columns being connected with the upper yoke and the lower yoke, respectively,

wherein the relative permeability of the first material is greater than that of the second material, and at least one air
gap is positioned in each of the first core columns; and

no air gap is positioned at interfaces between the first core columns and the upper yoke or interfaces between the first core
columns and the lower yoke; and

windings wound around the first core columns, wherein a minimum distance from the windings to the first core column is 3-5
times of a thickness of the air gap.

US Pat. No. 9,570,999

DC-DC CONVERTER AND DC-DC CONVERTER SYSTEM THEREOF

Delta Electronics (Shangh...

1. A DC-DC converter comprising: a power conversion circuit; and a current detection circuit configured to detect current
flowing into the power conversion circuit or flowing out of the power conversion circuit, comprising: an inductor coupled
to the power conversion circuit; a detection module comprising an induction winding and a capacitor which are electrically
coupled in series, wherein the detection module and the inductor are coupled in parallel; and an output module coupled to
two ends of the capacitor and configured to generate a current detection signal reflecting the current flowing into the power
conversion circuit or flowing out of the power conversion circuit.

US Pat. No. 9,312,753

POWER CONVERTER WITH LOW COMMON MODE NOISE

DELTA ELECTRONICS (SHANGH...

1. A power converter with low common mode noise, comprising:
a ground terminal;
a power converting unit, including a first DC terminal, a second DC terminal, a first AC terminal, a second AC terminal, and
a third AC terminal;

a capacitor unit of common DC bus, coupled to the first DC terminal and the second DC terminal;
a filtering capacitor unit, comprising a first filtering capacitor, a second filtering capacitor and a third filtering capacitor,
wherein one end of the first filtering capacitor, the second filtering capacitor and the third filtering capacitor are respectively
coupled to a first phase terminal, a second phase terminal and a third phase terminal, and the other end of the first filtering
capacitor, the second filtering capacitor and the third filtering capacitor are coupled to each other for forming a neutral
terminal; and

a filtering inductor unit, comprising:
a first primary winding, including a first primary winding low-frequency end and a first primary winding high-frequency end,
wherein the first primary winding low-frequency end is coupled to the first phase terminal and the first filtering capacitor,
and the first primary winding high-frequency end being coupled to the first AC terminal;

a first auxiliary winding, being magnetic coupled to the first primary winding, and including a first auxiliary winding high-frequency
end and a first auxiliary winding low-frequency end coupling to the neutral terminal;

a second primary winding, including a second primary winding low-frequency end and a second primary winding high-frequency
end, wherein the second primary winding low-frequency end is coupled to the second phase terminal and the second filtering
capacitor, and the second primary winding high-frequency end being coupled to the second AC terminal;

a second auxiliary winding, being magnetic coupled to the second primary winding, and including a second auxiliary winding
high-frequency end and a second auxiliary winding low-frequency end coupling to the first auxiliary winding high-frequency
end;

a third primary winding, including a third primary winding low-frequency end and a third primary winding high-frequency end,
wherein the third primary winding low-frequency end is coupled to the third phase terminal and the third filtering capacitor,
and the third primary winding high-frequency end being coupled to the third AC terminal; and

a third auxiliary winding, being magnetic coupled to the third primary winding, and including a third auxiliary winding low-frequency
end coupling to the second auxiliary winding high-frequency end and a third auxiliary winding high-frequency end coupling
to the ground terminal.

US Pat. No. 9,608,608

POWER MODULE

Delta Electronics (Shangh...

1. A power module, comprising:
a base plane;
at least one switch chip assembled on the base plane; and
a voltage clamping circuit for clamping a voltage spike occurring on the at least one switch chip, comprising components of
a charging loop, wherein the components of the charging loop at least comprise a capacitor,

a projection of a center point of at least one of the components of the charging loop on the base plane is located within
at least one first circle, defined with a center of the first circle being a center point of the at least one switch chip,
and with a radius of the first circle being a product of a maximum one of a length and a width of the at least one switch
chip and a first coefficient which is a multiple of 0.5.

US Pat. No. 9,620,448

POWER MODULE

DELTA ELECTRONICS (SHANGH...

1. A power module comprising:
a magnetic assembly having a first magnetic core, a second magnetic core and a receiving space, wherein the first magnetic
core has a first top surface, a first bottom surface and at least one first sidewall through-hole, the second magnetic core
is coupled with the first magnetic core, and the receiving space is formed between the first magnetic core and the second
magnetic core;

at least a switching device having a first electrode, wherein the switching device is disposed on the first top surface of
the first magnetic core and accommodated in the receiving space;

a first upper conductive element disposed on the first top surface of the first magnetic core and electrically connected to
the first electrode of the switching device; and

a first sidewall conductive element disposed in the first sidewall through-hole and electrically connected to the first upper
conductive element.

US Pat. No. 9,602,019

VOLTAGE-ADJUSTING DEVICE AND METHOD IN POWER CONVERSION SYSTEM

DELTA ELECTRONICS (SHANGH...

1. A voltage-adjusting device applied in a power conversion system, the power conversion system comprising a Vienna rectifier,
a DC bus, and an inverter, the Vienna rectifier converting a three-phase AC voltage of a grid to a DC bus voltage, the inverter
being electrically coupled to the DC bus and generating a three-phase AC signal based on the DC bus voltage transmitted by
the DC bus, the voltage-adjusting device comprising:
a grid voltage sampling module, electrically coupled to the grid, for sampling a grid voltage;
a given bus voltage calculating module for calculating a given DC bus voltage based on the grid voltage;
a voltage-adjusting module for receiving the DC bus voltage and the given DC bus voltage, and outputting an active current
given signal based on the DC bus voltage and the given DC bus voltage;

a current control module electrically coupled to the voltage-adjusting module, which is configured for receiving a three-phase
AC current from the grid, the active current given signal and the reactive current given signal to output a three-phase control
voltage;

a pulse width modulation (PWM) module for receiving the three-phase control voltage and the DC bus voltage to output a pulse
control signal to the Vienna rectifier; and

a rectifier switch control module for receiving the DC bus voltage and comparing it with a DC bus voltage threshold, and outputting
a switch control signal according to a comparison result, wherein the pulse width modulation module outputs the pulse control
signal based on the three-phase control voltage, the DC bus voltage and the switch control signal.

US Pat. No. 9,577,350

PIN AND A PRINTED CIRCUIT BOARD

DELTA ELECTRONICS (SHANGH...

1. A pin, comprising:
a pin body; and
an insertion head disposed on an end of the pin body and including a base and a guide post;
the base being cylindrical, the bottom of which is disposed on the end of the pin body; and
the guide post being a prism, which is coaxially connected to the base;
wherein the projection of a circumcircle of a cross section of the guide post completely coincides with that of a cross sectional
circle of the base along the direction of an axis of the guide post, and both the cross section of the guide post and the
cross sectional circle of the base are perpendicular to the axis of the guide post.

US Pat. No. 9,627,959

SWITCH POWER CONVERTER AND FREQUENCY RESPONSE CHARACTERISTIC TESTING AND ADJUSTING METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A switch power converter comprising:
a switch power unit comprising at least a power switch;
a controller configured to generate a control signal for the power switch;
a detector configured to detect an output voltage signal and/or an output current signal of the switch power unit and output
a sampling signal; and

a testing and adjusting unit configured to receive the sampling signal and output a testing signal to the controller, the
testing and adjusting unit comprising:

a generator for generating an AC disturbing signal;
a test part for receiving the AC disturbing signal and the sampling signal so as to measure an open-loop transfer function
of the switch power converter, the test part comprising:

a compensator configured for receiving the sampling signal and for outputting a compensation signal; and
a signal combiner configured for receiving the compensation signal and the AC disturbing signal and for outputting a mix signal
to the controller; and

an adjusting part for adjusting the compensator to compensate the switch power converter when a frequency response characteristic
of the switch power converter does not match a target frequency response characteristic based on data tested by the test part,

wherein
the AC disturbing signal has a frequency that varies with time and causes a difference in the sampling signal and the testing
signal so as to test the open-loop transfer function of the switch power converter, and

the compensator compensates the frequency response characteristic of the switch power converter when the frequency response
characteristic of the switch power converter does not match the target frequency response characteristic.

US Pat. No. 9,627,917

DEVICE FOR WIRELESS CHARGING CIRCUIT

Delta Electronics (Shangh...

1. A device for wireless charging circuit, the device comprising:
a primary circuit box, which comprises at least one first switch unit;
a secondary circuit box, which comprises at least one second switch unit;
a transmission plate, which comprises a primary inductor of a transformer and a primary compensation capacitor, the primary
inductor being coupled in series with the primary compensation capacitor; and

a receiving plate, which comprises a secondary inductor of the transformer;
wherein the transmission plate and the receiving plate are magnetically coupled with each other; the transmission plate is
coupled with the primary circuit box; and the receiving plate is coupled with the secondary circuit box; and

the transmission plate is a closed container, and the receiving plate is a closed container.

US Pat. No. 9,608,529

CONVERTER AND METHOD FOR CONTROLLING THE SAME

Delta Electronics (Shangh...

1. A method for controlling a Flyback converter, comprising:
a load detecting step for detecting a load at an output of the Flyback converter, wherein the load varies between zero and
a peak value, the Flyback converter comprises a switch; and

an operating mode control step for controlling the Flyback converter to switch between two or more of a continuous conduction
mode, a valley conduction mode and a burst mode according to the detected load,

wherein
the operating mode control step further comprises:
a continuous conduction mode control sub-step for controlling the Flyback converter to switch to the continuous conduction
mode when the load is greater than or equal to a first threshold;

a valley conduction mode control sub-step for controlling the Flyback converter to switch to the valley conduction mode when
the load is less than the first threshold and greater than a second threshold, the first threshold being greater than the
second threshold; and

a burst mode control sub-step for controlling the Flyback converter to switch to the burst mode when the load is less than
the second threshold, and the valley conduction mode control sub-step comprises:

a switch resonance voltage detecting sub-step for detecting a voltage waveform of an auxiliary winding coupled with a primary
winding of the Flyback converter when the load is less than the first threshold and greater than the second threshold, wherein
the voltage on the auxiliary winding reflects a resonance voltage imposed on the switch of the Flyback converter; and

a switch turn-on timing determining sub-step for determining a time point when the voltage on the auxiliary winding is at
a valley as the turn-on timing of the switch.

US Pat. No. 9,559,604

DC/DC CONVERTER AND CONTROL METHOD OF DC/DC CONVERTER

Delta Electronics (Shangh...

1. A DC/DC converter comprising:
an output voltage regulation circuit configured to regulate an output voltage of the DC/DC converter, so as to output a duty
cycle regulation signal;

a PWM generator electrically coupled to the output voltage regulation circuit, and configured to generate a first duty cycle
signal according to a first clock signal and the duty cycle regulation signal;

a detection circuit configured to output a control signal according to a second clock signal and a feedback signal, wherein
the second clock signal and the first clock signal keep the first duty cycle signal and the control signal in a same frequency,
and the feedback signal is used to detect whether or not a transient change of an input voltage of the DC/DC converter occurs;
and

a CBC regulation circuit electrically coupled to the PWM generator and the detection circuit, and configured to output a second
duty cycle signal according to the first duty cycle signal and the control signal,

wherein when a transient change of the input voltage occurs, the control signal is a square wave signal, and the second duty
cycle signal is a signal which is obtained by performing a logic AND operation with the first duty cycle signal and the control
signal.

US Pat. No. 9,658,258

POWER CONVERSION SYSTEM AND VOLTAGE SAMPLING DEVICE THEREOF

DELTA ELECTRONICS (SHANGH...

1. A voltage sampling device, comprising:
a first input path, comprising:
a first input voltage-dividing resistor unit, electrically coupled between a first voltage input terminal and a first node,
the first input voltage-dividing resistor unit receiving a first input voltage from the first voltage input terminal;

a second input voltage-dividing resistor unit, electrically coupled between the first node and a ground terminal, wherein
the first input voltage-dividing resistor unit and the second input voltage-dividing resistor unit generate a first input
divided voltage at the first node according to the first input voltage; and

a first DC (direct current) voltage-dividing resistor unit, electrically coupled between the first node and a DC voltage source,
wherein the DC voltage source generates a first DC bias voltage via the first DC voltage-dividing resistor unit at the first
node, and the first DC bias voltage combines with the first input divided voltage to generate a first sampled voltage signal;

a second input path, comprising:
a third input voltage-dividing resistor unit, electrically coupled between a second voltage input terminal and a second node,
the third input voltage-dividing resistor unit receiving a second input voltage from the second voltage input terminal;

a fourth input voltage-dividing resistor unit, electrically coupled between the second node and the ground terminal, wherein
the third input voltage-dividing resistor unit and the fourth input voltage-dividing resistor unit generate a second input
divided voltage at the second node according to the second input voltage; and

a second DC voltage-dividing resistor unit, electrically coupled between the second node and the DC voltage source, wherein
the DC voltage source generates a second DC bias voltage via the second DC voltage-dividing resistor unit at the second node,
and the second DC bias voltage combines with the second input divided voltage to generate a second sampled voltage signal,
wherein resistances of the third input voltage-dividing resistor unit, the fourth input voltage-dividing resistor unit and
the second DC voltage-dividing resistor unit are substantially the same as the first input voltage-dividing resistor unit,
the second input voltage-dividing resistor unit and the first DC voltage-dividing resistor unit;

a third input path, comprising:
a fifth input voltage-dividing resistor unit, electrically coupled between a third voltage input terminal and a third node,
the fifth input voltage-dividing resistor unit receiving a third input voltage from the third voltage input terminal;

a sixth input voltage-dividing resistor unit, electrically coupled between the third node and the ground terminal, wherein
the fifth input voltage-dividing resistor unit and the sixth input voltage-dividing resistor unit generate a third input divided
voltage at the third node according to the third input voltage; and

a third DC voltage-dividing resistor unit, electrically coupled between the third node and the DC voltage source, wherein
the DC voltage source generates a third DC bias voltage via the third DC voltage-dividing resistor unit at the third node,
and the third DC bias voltage combines with the third input divided voltage to generate a third sampled voltage signal, wherein
resistances of the fifth input voltage-dividing resistor unit, the sixth input voltage-dividing resistor unit and the third
DC voltage-dividing resistor unit are substantially the same as the first input voltage-dividing resistor unit, the second
input voltage-dividing resistor unit and the first DC voltage-dividing resistor unit; and

a signal processing module, the signal processing module receiving the first sampled voltage signal, the second sampled voltage
signal and the third sampled voltage signal to perform signal processing.

US Pat. No. 9,667,151

INTEGRATED MAGNETIC COMPONENT AND CONVERTER USING THE SAME

Delta Electronics (Shangh...

1. An integrated magnetic component, comprising:
a magnetic core having a first magnetic column, a second magnetic column, a third magnetic column, and a fourth magnetic column
arranged in sequence; and

a plurality of windings, which are wound on the magnetic core, wherein the plurality of windings comprise a primary winding,
a first secondary winding, a second secondary winding, and an inductor winding, wherein:

the primary winding, the first secondary winding and the second secondary winding are wound only on the second magnetic column,
and the first secondary winding is coupled to the second secondary winding; and

the inductor winding is wound only on the third magnetic column, and an end of the inductor winding is coupled to a connection
where the first secondary winding and the second secondary winding couple to each other.

US Pat. No. 9,634,573

POWER CONVERTER INCLUDING TWO CONVERTER CIRCUIT MODULES SHARING ONE DC CAPACITOR MODULE

DELTA ELECTRONICS (SHANGH...

1. A power converter, comprising:
a cabinet;
a first converter circuit module disposed in the cabinet and comprising at least one first bridge arm;
a second converter circuit module disposed in the cabinet and comprising at least one second bridge arm, wherein the first
bridge arm and the second bridge arm are parallel to a first direction and arranged side by side along a second direction,
and an air passage is formed between the first bridge arm and the second bridge arm; and

a DC capacitor module disposed in the cabinet and electrically connected between the first bridge arm and the second bridge
arm, so that the first bridge arm and the second bridge arm share the DC capacitor module.

US Pat. No. 9,620,292

DIRECT-CURRENT CAPACITOR MODULE AND LAMINATED BUSBAR STRUCTURE THEREOF

DELTA ELECTRONICS (SHANGH...

1. A direct-current capacitor module, comprising:
a plurality of direct-current capacitors, each of the direct-current capacitors comprising two capacitor binding posts, the
direct-current capacitors being grouped into a first portion and a second portion, the capacitor binding posts of the direct-current
capacitors in the first portion being disposed to face the capacitor binding posts of the direct-current capacitors in the
second portion respectively; and

a laminated busbar structure configured to be electrically connected with the capacitor binding posts of the direct-current
capacitors, the laminated busbar structure having a positive wiring terminal and a negative wiring terminal, the laminated
busbar structure comprising:

a first busbar layer comprising a first sub-busbar electrically connected between at least two direct-current capacitors in
the first portion;

a second busbar layer comprising a second sub-busbar electrically connected between at least two direct-current capacitors
in the second portion; and

an insulation layer disposed between the first busbar layer and the second busbar layer.

US Pat. No. 9,734,943

ELECTROMAGNETIC DEVICE AND CONDUCTIVE STRUCTURE THEREOF

DELTA ELECTRONICS (SHANGH...

1. A conductive structure for an electromagnetic device, comprising:
a conductive sheet being wound around an accommodating space and having two electrical connection terminals and a plurality
of conductive protruding portions and a plurality of base portions, wherein the conductive protruding portions protrude from
the base portions and being arranged between the electrical connection terminals, and two of the conductive protruding portions
adjacent to each other define a first heat dissipation passage, wherein at least one of the conductive protruding portions
is a hollow structure having two openings on opposite ends thereof and has a second heat dissipation passage, and the second
heat dissipation passage and the first heat dissipation passage are arranged alternately.

US Pat. No. 9,820,414

POWER CONVERSION DEVICE WITH COOLING SYSTEM

DELTA ELECTRONICS (SHANGH...

1. A power conversion device, comprising:
a casing comprising a base plate and a side wall, the base plate having a concave recess therein, the base plate forming a
base plate convex hull at a side opposite to the concave recess, the side wall surrounding the base plate;

a middle plate having a middle plate groove therein, the middle plate groove corresponding to the base plate convex hull,
the middle plate and the base plate combining up, such that the base plate convex hull fluidly seals the middle plate groove,
making the middle plate groove form a first coolant channel, the middle plate forming a middle plate convex hull at a side
opposite to the middle pate groove, the middle plate convex hull and the side wall forming an accommodation space in between;

a converter module at least partially located in the concave recess; and
at least one fixing piece fastening together the middle plate and the base plate and being at least partially located in the
accommodation space.

US Pat. No. 9,667,178

VARIABLE FREQUENCY SPEED CONTROL SYSTEM AND METHOD OF THE SAME

DELTA ELECTRONICS (SHANGH...

1. A variable frequency speed control system having a Low Voltage Ride Through (LVRT) function which comprises a variable
frequency drive (VFD) having a rectifier, a DC bus and an inverter, wherein the rectifier converts a grid voltage to a DC
bus voltage, the inverter converts the DC bus voltage to a three phase AC signal by the DC bus, the variable frequency speed
control system further comprising:
a voltage drop detecting module electrically coupled to a grid, for sampling the grid voltage, generating a voltage drop coefficient
according to the sampled grid voltage and a rated grid voltage, and generating a corresponding operation mode switching signal
according to the voltage drop coefficient;

a bus voltage detecting module electrically coupled to the DC bus, for sampling the DC bus voltage;
a current detecting module electrically coupled to the inverter, for sampling a three phase current signal of the three phase
AC signal outputted from the inverter;

an active current decomposing module coupling with the current detecting module, for retrieving a load active current component
of the inverter from the three phase current signal sampled by the current detecting module to generate a load active current
component;

a power reduction control module coupling with the voltage drop detecting module, for receiving the voltage drop coefficient
from the voltage drop detecting module and the load active current component from the active current decomposing module to
generate a first frequency decreasing amount;

renewable power control module coupling with the bus voltage detecting module and the active current decomposing module, for
receiving the DC bus voltage from the bus voltage detecting module, a maintaining command voltage and the load active current
component from the active current decomposing module to generate a second frequency decreasing amount;

a frequency control module for generating target frequency signal according to a given frequency control signal;
an operation mode selecting module coupling with the power reduction control module, the renewable power control module and
the frequency control module, for receiving the target frequency signal, the first frequency decreasing amount and the second
frequency decreasing amount to generate an output frequency signal according to the operation mode switching signal; and

an inverter control module for generating a three phase modulating signal according to the output frequency signal, which
is used to control the operation of inverter.

US Pat. No. 9,667,166

FIVE-LEVEL CONVERTING DEVICE

Delta Electronics (Shangh...

1. A five-level converting device, comprising:
an alternating current (AC) terminal;
a bus capacitor module, having a positive terminal, a negative terminal and a neutral point;
a first switch module, having two terminals connected to the neutral point of the bus capacitor module and the AC terminal
respectively, wherein the first switch module comprises a plurality of bidirectional switching circuits cascaded to each other,
each of the bidirectional switching circuits comprises two first switching units reversely connected in series;

a second switch module, having two terminals connected to the positive terminal of the bus capacitor module and the AC terminal
respectively, wherein the second switch module comprises a plurality of second switching units connected in series;

a third switch module, having two terminals connected to the negative terminal of the bus capacitor module and the AC terminal
respectively, wherein the third switch module comprises a plurality of third switching units connected in series;

a first flying capacitor unit, connected across the first switch module and the second switch module; and
a second flying capacitor unit, connected across the first switch module and the third switch module, wherein the first flying
capacitor unit and the second flying capacitor unit are connected to different connection points between the first switching
units of the first switch module,

wherein the first flying capacitor unit has a first end connected to the second switch module and a second end connected to
a first connection point of the first switch module without connecting any other flying capacitor unit, and the second flying
capacitor unit has a first end connected to the third switch module and a second end connected to a second connection point
of the first switch module without connecting any other flying capacitor unit, wherein one or more of the first switching
units are inserted between the first and second connection points of the first switch module, so that the first connection
point is isolated from the second connection point when the one or more of the first switching units are turned off.

US Pat. No. 9,668,384

POWER CONVERSION DEVICE AND METHOD FOR ASSEMBLING THE SAME

Delta Electronics (Shangh...

1. A power conversion device, comprising:
a heat-dissipating base comprising a three-dimensional structure having an accommodation trough, and a potting glue disposed
in the accommodation trough;

a printed wiring board comprising a first connecting portion having a first through hole;
an electronic component disposed between the printed wiring board and the heat-dissipating base and mounted on the heat-dissipating
base, the electronic component comprising a magnetic component at least partially disposed in the accommodation trough, and
electrically connected to the printed wiring board, wherein a gap is defined between the magnetic component and the three-dimensional
structure, and the potting glue is filled in the gap to at least partially cover the magnetic component;

a fixing assembly fixing the magnetic component and the printed wiring board, such that the magnetic component and the printed
wiring board are electrically connected by the fixing assembly; and

a cover covering the magnetic component and the accommodation trough and fixed to the printed wiring board by the fixing assembly;
wherein the magnetic component comprises a second connecting portion disposed between the cover and the first connecting portion,
and the second connecting portion has a second through hole, the fixing assembly comprises a first fixing member and a second
fixing member corresponding to each other, the second fixing member is disposed on the cover; and the first fixing member
passes the first through hole and the second through hole and is fixed to the second fixing member, such that the second connecting
portion is electrically connected to the first connecting portion.

US Pat. No. 9,735,137

SWITCH CIRCUIT PACKAGE MODULE

DELTA ELECTRONICS (SHANGH...

1. A switch circuit package module, comprising:
at least a semiconductor switch unit comprising:
a first semiconductor switch element comprising a plurality of sub micro-switch elements; and
a second semiconductor switch element comprising a plurality of sub micro-switch elements; and
at least a capacitor unit comprising a plurality of capacitors, wherein the capacitors are arranged in a symmetrical distribution
surrounded the semiconductor switch unit, such that impedances of any two symmetrical commutation loops each of which mainly
consists of one capacitor and two sub micro-switch elements from the first semiconductor switch element and second semiconductor
switch element respectively are close to or the same with each other, wherein each of the first semiconductor switch element
and the second semiconductor switch element has source, drain and gate, the first semiconductor switch element is stacked
with the second semiconductor switch element and electrically connects with the second semiconductor switch element in series,
both of the first semiconductor switch element and the second semiconductor switch element are perpendicular type of semiconductor
switch chip which has source and drain in two different planes, each capacitor is configured with two terminals which are
electrically connected with the source of the first semiconductor switch element and the drain of the second semiconductor
switch element respectively.

US Pat. No. 9,800,175

FIVE-LEVEL CONVERTING DEVICE

DELTA ELECTRONICS (SHANGH...

1. A five-level converting device, comprising:
an AC terminal;
a bus capacitor module, having a positive terminal, a negative terminal and a neutral terminal;
a first switch module, having a bidirectional switching circuit, wherein the bidirectional switching circuit comprises two
first switching units reversely connected in series, a terminal of one of the two first switching units connects to the neutral
terminal of the bus capacitor module;

a second switch module, having two second switching units, two third switching units, two fourth switching units and two fifth
switching units, wherein the two second switching unit are cascaded to each other, the two third switching units, the two
fourth switching units and the two fifth switching units are cascaded and are connected to the bus capacitor module in parallel,
wherein the two third switching units are connected to the positive terminal of the bus capacitor module, the two fifth switching
units are connected to the negative terminal of the bus capacitor module, the two fourth switching units and the two second
switching units are connected in parallel, wherein a connection point between the two fourth switching units connects to the
AC terminal, a connection point between the two second switching units connects to a terminal of the other first switching
unit of the two first switching units; and

two flying capacitor modules, connected across the first switch module and the second switch module, wherein a connection
point between the two first switching units, and the connection point between the two second switching units are respectively
connected to a connection point between the two third switching units and a connection point between the two fifth switching
units through the two flying capacitor modules.

US Pat. No. 9,719,802

TRANSMITTER AND MONITORING SYSTEM USING THE SAME

Delta Electronics (Shangh...

1. A transmitter, comprising:
a multi-to-one multiplexing switch configured to receive a plurality of sensor signals of a plurality of channels through
a plurality of input terminals, select one sensor signal from the plurality of sensor signals, and output the selected sensor
signal through a output terminal;

a first variable gain amplifier configured to receive the selected sensor signal, amplify the selected sensor signal with
a gain within a first gain range, and output the amplified sensor signal;

a control parameter input terminal configured to receive an input control parameter from outside of the transmitter;
an operating and switching selector configured to perform operations according to the input control parameter, so as to control
the multi-to-one multiplexing switch to select the one sensor signal and control the gain of the first variable gain amplifier;

a plurality of second variable gain amplifiers configured to be placed at a preceding stage of the multi-to-one multiplexing
switch for respectively receiving the plurality of sensor signals, be controlled by the operating and switching selector to
pre-amplify the plurality of sensor signals with gains within a second gain range, and output the plurality of pre-amplified
sensor signals to the plurality of input terminals of the multi-to-one multiplexing switch; and

a plurality of analog switches configured to be placed at a preceding stage of the plurality of second variable gain amplifiers
for respectively receiving the plurality of sensor signals, and be controlled by the operating and switching selector to transfer
the plurality of sensor signals to the plurality of input terminals of the multi-to-one multiplexing switch, or to the plurality
of second variable gain amplifiers.

US Pat. No. 9,693,412

DIMMING DRIVER CIRCUIT AND CONTROL METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A dimming driver circuit for adjusting brightness of a light emitting diode, the dimming driver circuit comprising:
a power converting unit comprising input terminals for receiving an input voltage, output terminals for outputting an output
voltage and at least one first switch, wherein the power converting unit converts the input voltage into the output voltage
according to an operation of the at least one first switch;

an input voltage detection unit electrically connected with the input terminals for detecting the input voltage and generating
a first detecting signal according to a detecting result of the input voltage detection unit;

an output voltage detection unit electrically connected with the output terminals for detecting the output voltage and generating
a second detecting signal according to a detecting result of the output voltage detection unit;

a driving unit electrically connected with the at least one first switch for driving the at least one first switch according
to a control signal; and

a control unit electrically connected with the driving unit, the input voltage detection unit and the output voltage detection
unit, wherein the control unit calculates an on-time period of the at least one first switch in an operation cycle according
to the first detecting signal, the second detecting signal and a dimming signal, and the control unit generates the control
signal to the driving unit according to the on-time period;

wherein the control unit comprises:
a dimming signal processor configured for receiving the dimming signal and generating a reference current according to the
dimming signal;

a storage unit electrically connected with the dimming signal processor for storing the reference current;
a computing unit electrically connected with the storage unit, the input voltage detection unit and the output voltage detection
unit, wherein the computing unit calculates the on-time period of the at least one first switch according to the reference
current, the first detecting signal and the second detecting signal, and then outputs a calculating result; and

a pulse controller electrically connected with the computing unit, wherein the computing unit receives the calculating result
and generates the control signal according to the calculating result.

US Pat. No. 9,722,535

METHOD AND DEVICE FOR ARC FAULT DETECTION FOR PHOTOVOLTAIC INVERTER AND PHOTOVOLTAIC INVERTER USING THE SAME

Delta Electronics (Shangh...

1. A method for arc fault detection for a photovoltaic inverter, comprising:
acquiring current signals at a DC side of the photovoltaic inverter;
obtaining frequency spectral characteristics of the current signal according to the current signal;
judging whether the frequency spectral characteristics of the current signal have a frequency spectral characteristic of an
arc; and

if the frequency spectral characteristics of the current signal have a frequency spectral characteristic of an arc,
shutting down the photovoltaic inverter,
acquiring respectively a first input voltage when the photovoltaic inverter is shut down and a second input voltage after
a predetermined time period after the shutdown,

calculating a voltage drop from the first input voltage to the second input voltage, and
judging whether an arc fault occurs according to the voltage drop.

US Pat. No. 10,024,687

TRANSMITTER AND MONITORING SYSTEM USING THE SAME

Delta Electronics (Shangh...

1. A transmitter, comprising:a multi-to-one multiplexing switch configured to receive a plurality of sensor signals of a plurality of channels through a plurality of input terminals, select one sensor signal from the plurality of sensor signals, and output the selected sensor signal through a output terminal;
a first variable gain amplifier configured to receive the selected sensor signal, amplify the selected sensor signal with a gain within a first gain range, and output the amplified sensor signal;
a control parameter input terminal configured to receive an input control parameter from outside of the transmitter;
an operating and switching selector configured to perform operations according to the input control parameter, so as to control the multi-to-one multiplexing switch to select the one sensor signal and control the gain of the first variable gain amplifier; and
a time division multiplexer configured to be placed at a subsequent stage of the first variable gain amplifier, so as to perform time division multiplexing to the amplified sensor signals output from the first variable gain amplifier, and output the time division multiplexed sensor signals.

US Pat. No. 9,943,000

POWER MODULE AND POINT-OF-LOAD (POL) POWER MODULE

Delta Electronics (Shangh...

1. A power module, comprising an inductor and a main board, wherein the inductor is disposed on the main board and includes an upper magnetic core, a printed circuit board (PCB) winding board, pins and a lower magnetic core; the PCB winding board is disposed between the upper magnetic core and the lower magnetic core; first ends of the pins are connected to the PCB winding board; and a second end, opposite to the first end, of at least one pin is extended and exceeds a bottom surface of the lower magnetic core and is connected to the main board, so that a receiving space is formed between the bottom surface of the lower magnetic core and an upper surface of the main board,wherein the lower magnetic core includes a first winding column, a second winding column and a common magnetic column disposed between the first winding column and the second winding column,
wherein the PCB winding board includes a first winding and a second winding; the first winding is disposed on the first winding column to form a first inductor; the second winding is disposed on the second winding column to form a second inductor.

US Pat. No. 10,039,214

HEAT SPREADER AND POWER MODULE

Delta Electronics (Shangh...

1. A heat spreader connected to a power convertor comprising:a base plate comprising a first surface and a side surface, and the side surface is connected to the first surface;
an insulating material, being attached to the first surface and extended to be attached to at least a part of the side surface to increase a creepage distance between a conductive device close to a border of the power convertor and the base plate; and
an insulating frame, comprising a vertical part, which is fixedly connected to the insulating material attached to the first surface and the side surface,
wherein the insulating material is positioned between the power convertor and the base plate, and
wherein insulating frame is positioned between the power convertor and the base plate.

US Pat. No. 10,104,797

POWER MODULE, POWER CONVERTER AND MANUFACTURING METHOD OF POWER MODULE

DELTA ELECTRONICS (SHANGH...

1. A power module, comprising:a heat-dissipating substrate;
a first planar power device comprising a plurality of electrodes which are all on an upper surface of the first planar power device;
a second planar power device comprising a plurality of electrodes which are all on an upper surface of the second planar power device;
a capacitor disposed above the first planar power device and the second planar power device, wherein the capacitor is directly electrically connected to electrodes of the first planar power device and the second planar power device;
at least one switching device, wherein the at least one switching device is electrically connected to the electrodes of the first planar power device or the electrodes of the second planar power device; and
an insulating layer having a top surface and a bottom surface, wherein the bottom surface of the insulating layer is disposed on the heat-dissipating substrate, the capacitor is disposed on the top surface of the insulating layer, and the switching device is disposed on the top surface of the insulating layer,
wherein a lower surface of the first planar power device and a lower surface of the second planar power device are disposed above the heat-dissipating substrate.

US Pat. No. 9,800,176

TNPC INVERTER DEVICE AND METHOD FOR DETECTING SHORT-CIRCUIT THEREOF

Delta Electronics (Shangh...

1. A TNPC inverter device, comprising:
a TNPC inverter module comprising:
a first DC terminal;
a second DC terminal;
an AC terminal;
a capacitor bridge arm;
an inverting bridge arm comprised an upper switch unit and a lower switch unit which are connected in series; and
a bi-directional switching bridge arm; and
a short circuit detecting module, mainly consisting of an upper switch detecting unit and a lower switch detecting unit;
wherein ends of the capacitor bridge arm and ends of the inverting bridge arm are correspondingly connected to the first DC
terminal and the second DC terminal, ends of the bi-directional switching bridge arm are correspondingly connected to a midpoint
of the capacitor bridge arm and a midpoint of the inverting bridge arm, the AC terminal is the midpoint of the inverting bridge
arm; and

wherein the upper switch detecting unit is configured to detect a voltage drop of the upper switch unit, and the lower switch
detecting unit is configured to detect a voltage drop of the lower switch unit,

wherein the TNPC inverter module futher comprises a midpoint terminal, and the midpoint of the capacitor bridge arm is eletrically
connected with the midpoint terminal,

wherein the bi-directional switching bridge arm comprises:
a first flow direction switch unit; and
a second flow direction switch unit,
when the first flow direction switch unit turns on, current in the bi-directional switching bridge arm flows to the midpoint
terminal from the AC terminal, and when the second flow direction switch unit turns on, current in the bio-directional switching
bridge arm flows to the AC terminal from the midpoint terminal, and

wherein when a short-circuit path comprised both the bi-directional switching bridge arm and the upper switch unit or the
lower switch unit, the voltage drop of the upper switch unit of the voltage drop of the lower switch unit in the short-circuit
path is not less than voltage drops of the corresponding first flow direction switch unit or second flow direction switch
unit.

US Pat. No. 10,126,795

POWER CHIP

DELTA ELECTRONICS (SHANGH...

1. A power chip, comprising:a first power switch, formed in a wafer region, each first power switch having a first metal electrode and a second metal electrode;
a second power switch, formed in the wafer region, each second power switch having a third metal electrode and a fourth metal electrode, wherein the first power switch and the second power switch respectively constitute an upper bridge arm and a lower bridge arm of a bridge circuit, at least one bridge arm of the upper bridge arm and the lower bridge arm comprises two or more power switches parallel to each other, wherein the first power switch and the second power switch are arranged alternately along at least one dimension direction; and
a metal region, comprising a first metal layer, a second metal layer and a third metal layer that are stacked in sequence, wherein each of the first metal layer, the second metal layer and the third metal layer comprises first strip electrodes, second strip electrodes and third strip electrodes, and strip electrodes among the first, second and third strip electrodes with the same voltage potential in two adjacent metal layers among the first metal layer, the second metal layer and the third metal layer are electrically coupled.

US Pat. No. 9,754,871

SWITCH CIRCUIT PACKAGE MODULE

DELTA ELECTRONICS (SHANGH...

1. A switch circuit package module, comprising:
at least a semiconductor switch unit comprising:
a first semiconductor switch element comprising a plurality of parallel connected sub micro-switch elements, each sub micro-switch
element configured with a drain electrode and a source electrode; and

a second semiconductor switch element comprising a plurality of parallel connected sub micro-switch elements, each sub micro-switch
element configured with a drain electrode and a source electrode; and

at least a capacitor unit comprising a plurality of capacitors;
wherein the semiconductor switch unit comprises a plurality of common electrodes, each common electrode connects the source
electrode of one sub micro-switch element in the first semiconductor switch element with the drain electrode of one sub micro-switch
element in the second semiconductor switch element, such that when the capacitors are configured to cooperate with the sub
micro-switch element, impedances of multiple commutation loops between the capacitors and the sub micro-switch element are
close to or the same with each other, each of the common electrodes is arranged between the drain electrode of the first semiconductor
switch element and the source electrode of the second semiconductor switch element, each of the drain electrodes of the first
semiconductor switch element and each of the source electrodes of the second semiconductor switch element are arranged alternately.

US Pat. No. 9,685,883

THREE-LEVEL RECTIFIER

DELTA ELECTRONICS (SHANGH...

1. A three-level rectifier comprising at least one phase bridge arm, and the at least one phase bridge arm comprising:
an upper-half bridge arm circuit module comprising a first power semiconductor transistor unit, a first diode unit without
connecting any switch in parallel, a second diode unit without connecting any switch in parallel, a first connecting busbar,
a first insulated wire and a first transfer busbar, the first diode unit connected to the second diode unit in series, the
first diode unit connected to a positive terminal of a direct-current bus, the first connecting busbar connected to the first
power semiconductor transistor unit and the first diode unit, the first transfer busbar connected to the second diode unit,
and the first insulated wire connected to the first transfer busbar and the first connecting busbar; and

a lower-half bridge arm circuit module comprising a second power semiconductor transistor unit, a third diode unit without
connecting any switch in parallel, a fourth diode unit without connecting any switch in parallel, a second connecting busbar,
a second insulated wire and a second transfer busbar, the third diode unit connected to the fourth diode unit in series, the
first power semiconductor transistor unit and the second power semiconductor transistor unit both connected to a neutral point
of a capacitor unit, the second diode unit and the third diode unit connected to an alternating-current terminal, the fourth
diode unit connected to a negative terminal of the direct-current bus, the capacitor unit connected between the positive terminal
of the direct-current bus and the negative terminal of the direct-current bus, the second connecting busbar connected to the
second power semiconductor transistor unit and the fourth diode unit, the second transfer busbar connected to the third diode
unit, the second insulated wire connected to the second connecting busbar and the second transfer busbar, and the upper-half
bridge arm circuit module and the lower-half bridge arm circuit module disposed side by side and facing each other.

US Pat. No. 9,800,056

MULTI-POWER SUPPLY SYSTEM AND CONTROL METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A multi-power supply system comprising:
a plurality of power-supply units, each power-supply unit comprising a reverse current prevention circuit, a converter circuit,
and an input circuit, the input circuit being electrically coupled to the converter circuit via the reverse current prevention
circuit, wherein the plurality of power-supply units comprises:

a first power-supply unit comprising a first reverse current prevention circuit, a first converter circuit, and a first input
circuit, the first input circuit being electrically coupled to the first converter circuit via the first reverse current prevention
circuit; and

a second power-supply unit comprising a second reverse current prevention circuit (126), a second converter circuit, and a second input circuit, the second input circuit being electrically coupled to the second
converter circuit via the second reverse current prevention circuit, the first converter circuit and the second converter
circuit being electrically coupled to a load;

a switching unit electrically coupled to the plurality of power-supply units; and
a control unit electrically coupled to the switching unit;
wherein when the first input circuit and the second input circuit are in normal operation, the control unit turns off the
at least one switch of the switching unit, the first reverse current prevention circuit and the second reverse current prevention
circuit are conducted;

when the first input circuit is in normal operation and the second input circuit is in abnormal operation, the control unit
turns on the at least one switch of the switching unit to cut off the second reverse current prevention circuit;

when the second input circuit is in normal operation and the first input circuit is in abnormal operation, the control unit
turns on at least one switch of the switching unit to cut off the first reverse current prevention circuit.

US Pat. No. 9,797,932

VOLTAGE SAMPLING SYSTEM

DELTA ELECTRONICS (SHANGH...

1. A voltage sampling system, comprising:
a voltage sampling device, comprising:
a voltage-dividing resistor module comprising a first voltage-dividing resistor unit, a central voltage-dividing resistor
unit and a second voltage-dividing resistor unit which are sequentially electrically connected in series between two terminals
of a voltage source, wherein the first voltage-dividing resistor unit and the second voltage-dividing resistor unit have substantially
the same resistance values, wherein a middle point of the central voltage-dividing resistor unit is electrically connected
to a ground terminal, and the central voltage-dividing resistor unit generates a first divided voltage and a second divided
voltage based on a first terminal and a second terminal of the central voltage-dividing resistor unit respectively;

a common mode rejection circuit configured to receive the first divided voltage and the second divided voltage to perform
a common-mode noise rejecting process and generate an output voltage;

an analog-to-digital converter configured to convert the output voltage from analog format to digital format, thereby generating
a digital data signal; and

a transmitting module configured to receive and encode the digital data signal and a clock signal, thereby generating an output
signal;

an optic-fiber transmission line configured to transmit the output signal; and
a control device having a processing module configured to receive the output signal from the analog-to-digital converter via
the optic-fiber transmission line, thereby performing a digital data process by the processing module;

wherein the transmitting module generates a protection notification signal when an over-voltage condition occurs from the
voltage source, such that the processing module performs an over-voltage protection process for the voltage source according
to the protection notification signal, and the protection notification signal is an output voltage level of the output signal
lowered by the transmitting module, and the transmitting module keeps the lowered output voltage level for a predetermined
period of time.

US Pat. No. 10,136,527

POWER CONVERSION DEVICE

DELTA ELECTRONICS (SHANGH...

1. A power conversion device, comprising:a casing comprising a base plate and a side wall, the base plate and the side wall forming a chamber;
a structural plate located in the chamber;
a converter module located between the base plate and the structural plate;
an auxiliary circuit board module located at a side of the structural plate in the chamber away from the base plate, and electrically connected with the converter module;
a top cover sealing the chamber;
at least one strut comprising:
an insulating column, an end of the insulating column being connected with the base plate;
at least one terminal located at another end of the insulating column; and
at least one connecting piece electrically connected with the terminal; and
at least one fastener fastening together the connecting piece, the terminal and the insulating column.

US Pat. No. 9,967,945

ELECTRONIC APPARATUS

DELTA ELECTRONICS (SHANGH...

1. An electronic device comprising:a voltage conversion unit configured to transfer an input voltage to an output voltage;
a first load unit comprising a first terminal and a second terminal, and the first terminal configured to receiving the output voltage;
a current adjusting unit electrically coupled with the second terminal of the first load unit, configured to control a first driving current flowing through the first load unit according to a first current reference signal; and
a control unit electrically coupled with the first load unit and the voltage conversion unit, configured to generate a first voltage reference signal according to the first current reference signal and generate a first control signal to the voltage conversion unit according to a voltage of the second terminal of the first load unit and the first voltage reference signal.

US Pat. No. 9,748,831

POWER CONVERSION DEVICE AND METHOD FOR TRANSMITTING PROTECTION SIGNAL USING THE SAME

DELTA ELECTRONICS (SHANGH...

1. A power conversion device, comprising:
a power semiconductor switch module, comprising a plurality of power semiconductor switches;
a driving signal transmitting circuit electrically coupled to the power semiconductor switch module, and configured to receive
a control signal and generate a driving signal according to the control signal to drive the conduction or non-conduction of
the power semiconductor switch module; and

a plurality of fault detecting circuits, wherein each of the plurality of fault detecting circuits is configured to correspondingly
detect one of the plurality of power semiconductor switches and/or the driving signal transmitting circuit, and generate a
fault signal when one of the plurality of power semiconductor switches and/or the driving signal transmitting circuit is malfunctioning;

a protection signal transmitting circuit, comprising:
an isolated pulse transforming unit coupled to the plurality of fault detecting circuits, and configured to receive a corresponding
fault pulse signal generated according to the fault signal, and to output a protection pulse signal;

a protection signal processing unit electrically coupled the isolated pulse transforming unit; and
a plurality of protection signal generating units electrically coupled to the isolated pulse transforming unit, wherein each
of the plurality of protection signal generating units is correspondingly coupled to the one of the plurality of fault detecting
circuits,

wherein the isolated pulse transforming unit comprises a plurality of input windings, and only one output winding, each of
the plurality of input windings is correspondingly electrically coupled to the one of the plurality of protection signal generating
units, and the only one output winding is electrically coupled to the protection signal processing unit;

a control circuit coupled to the driving signal transmitting circuit and the protection signal processing unit, and configured
to generate the control signal and receive a protection signal generated according to the protection pulse signal, and generate
a control-terminal turn-off signal according to the protection signal to turn off the power semiconductor switch module.

US Pat. No. 9,906,010

DRIVING DEVICE AND DRIVING METHOD

DELTA ELECTRONICS (SHANGH...

1. A driving device configured to drive a power semiconductor switch module based on a main control signal, the driving device
comprising:
a voltage-modulating unit, wherein when the voltage-modulating unit receives a protection signal, the voltage-modulating unit
generates a turn-off pulse signal based on the protection signal, and wherein when the voltage-modulating unit does not receive
the protection signal, the voltage-modulating unit modulates the main control signal into a positive-narrow pulse signal and
a negative-narrow pulse signal, wherein the turn-off pulse signal is a negative pulse signal, and a pulse-width of the negative
pulse signal is wider that a pulse-width of the negative-narrow pulse signal; and

a driving module configured to turn off the power semiconductor switch module based on the turn-off pulse signal,
wherein the voltage-modulating unit comprises:
a signal processing unit configured to receive the main control signal; and
a turn-off circuit configured to receive the protection signal and generate a driving-regulating signal based on the protection
signal, so that the signal processing unit generates the turn-off pulse signal based on the driving-regulating signal.

US Pat. No. 10,165,695

APPARATUS FOR INSTALLING HIGH AND LOW VOLTAGE CONVERSION CIRCUIT, HIGH AND LOW VOLTAGE CONVERSION SYSTEM AND POWER SOURCE

Delta Electronics (Shangh...

1. An apparatus for installing a high and low voltage conversion circuit, comprising: a first housing made of an insulation material and a second housing made of a metallic material; whereinthe first housing is provided with a first opening and a second opening at both ends respectively in a first direction, and the second housing is provided with a third opening and a fourth opening at both ends respectively in the first direction;
the first housing and the second housing are fixed, and the first housing and the second housing are in contact on at least part of surfaces thereof;
a first cavity is formed in the first housing for installing a high-voltage circuit, a second cavity is formed in the second housing for installing a low-voltage circuit;
the second opening is used for inserting therethrough a high voltage terminal electrically coupled with the high-voltage circuit; and
the fourth opening is used for inserting therethrough a low voltage terminal electrically coupled with the low-voltage circuit.

US Pat. No. 9,837,918

CONVERTER CIRCUIT WITH A SWITCHABLE TOPOLOGY AND METHOD OF CONVERTING POWER

DELTA ELECTRONICS (SHANGH...

1. A converter circuit comprising:
an inverter configured to receive an input voltage, and convert the input voltage into a primary-side alternating-current
(AC) voltage, the inverter comprising:

a first switch unit having a plurality of switches;
a second switch unit having a plurality of switches; and
a controller, wherein when the converter circuit works in a first inversion mode, the controller is configured to control
the plurality of switches of the first switch unit and the second switch unit to cooperatively switch on and switch off periodically
according to an output voltage of the converter circuit, and when the converter circuit works in a second inversion mode,
the controller is configured to control the first switch unit to operate independently and the plurality of switches of the
first switch unit switch on and switch off periodically; wherein the converter circuit has different voltage gains in the
first inversion mode and in the second inversion mode,

wherein after the controller receives a signal associated with an output state of the converter circuit being changed:
the controller adjusts a gain associated with the output voltage and the input voltage to a first gain value to change the
output voltage from a first voltage to a second voltage, and after the gain is adjusted, the controller switches an inversion
mode of the converter circuit from the first inversion mode to the second inversion mode to change the output voltage from
the second voltage to a target voltage, or

the controller switches the inversion mode of the converter circuit from the second inversion mode to the first inversion
mode to change the output voltage from the first voltage to the second voltage, and after the controller switches the inversion
mode of the converter circuit, the gain is adjusted to change the output voltage from the second voltage to the target voltage.

US Pat. No. 9,754,715

MAGNETIC ASSEMBLY

DELTA ELECTRONICS (SHANGH...

1. A magnetic assembly, comprising:
a magnetic core comprising plural magnetic legs, wherein at least one magnetic path is defined by the plural magnetic legs
collaboratively, wherein at least one low-permeability structure is formed in at least one specified magnetic leg of the plural
magnetic legs; and

at least one foil winding assembly wound around at least one specified magnetic leg of the plural magnetic legs so that plural
winding parts in a multi-layered arrangement are sequentially stacked on the specified magnetic leg, wherein a direction of
a conductor thickness of each winding part is perpendicular to a direction of a magnetic flux through the specified magnetic
leg,

wherein the plural winding parts are gradually close to the low-permeability structure along an arranging direction, and the
conductor thicknesses of at least two of the plural winding parts are gradually decreased along the arranging direction.

US Pat. No. 9,960,592

SHORT-CIRCUIT DETECTION DEVICE AND METHOD USED IN INVERTER CIRCUIT

DELTA ELECTRONICS (SHANGH...

1. A method for detecting a short circuit fault in a multi-level inverter circuit, the multi-level inverter circuit comprising a plurality of single phase branches, each of which comprises a plurality of switches, the method comprising:transmitting at least one detection pulse sequence to the plurality of switches of the single phase branch, wherein the at least one detection pulse sequence comprises a number of “0” and “1” pulses and the “0” and “1” pulses are transmitted to the switches respectively, wherein the “0” pulse represent a low level pulse and the “1” pulse represent a high level pulse;
determining whether a conducting loop is formed in the single phase branch according to the detection pulse sequence; and
locating a respective position of one or more malfunctioned switches according to a path of the conducting loop when the conducting loop exists, wherein a switch corresponding to the “0” pulse is determined as a short circuit fault, and after the switch corresponding to the “0” pulse is determined as the short circuit fault, a short-circuit protection process is performed to shut down the multi-level inverter circuit.

US Pat. No. 9,875,842

INDUCTOR AND CONVERTER HAVING THE SAME

Delta Electronics (Shangh...

1. An inductor having a current sampling function, comprising:
a magnetic core comprising at least one window; and
at least one winding provided within the at least one window, wherein the at least one winding comprises a main body part
and a sampling part, the main body part has a first end and a second end, the sampling part has a first end and a second end,
the first end of the sampling part is connected to the second end of the main body part such that the main body part and the
sampling part are connected in series, and a length ratio of the sampling part to the main body part is less than 2,

wherein the main body part is formed of a low resistivity conductive material, the sampling part is formed of a low temperature
coefficient conductive material, and a current flowing through the inductor is sampled across two ends of the sampling part,

wherein the inductor further comprises a first sampling terminal and a second sampling terminal, the first sampling terminal
is connected to the second end of the main body part or the first end of the sampling part, the second sampling terminal is
connected to the second end of the sampling part, and the current flowing through the inductor is sampled by the first sampling
terminal and second sampling terminal, and

wherein the inductor further comprises a first inductive terminal provided at the first end of the main body part, wherein
the second sampling terminal also functions as a second inductive terminal, and the second sampling terminal and the second
inductive terminal are the same terminal, have the same size and are commonly used.

US Pat. No. 9,837,930

POWER SUPPLY SYSTEM AND POWER CONVERSION DEVICE

Delta Electronics (Shangh...

1. A power conversion device for converting electric energy outputted by a power supply module, which is coupled with first
and second bus capacitors in series, the power conversion device comprising:
an electric energy conversion module configured to convert the electric energy outputted by the power supply module into a
single-phase two-wire output or a single-phase three-wire output, wherein the electric energy conversion module comprises:

a voltage-balanced half-bridge circuit having a bridge arm midpoint coupled with each first terminal of the first and second
bus capacitors;

a bridge conversion circuit having a first input terminal coupled with a second terminal of the first bus capacitor, a second
input terminal coupled with a second terminal of the second bus capacitor, and first and second output terminals providing
the single-phase two-wire output; and

a neutral line having a first terminal coupled with the bridge arm midpoint, and a second terminal providing the single-phase
three-wire output together with the first and second output terminals of the bridge conversion circuit; and

a switching module coupled with the electric energy conversion module, and configured to determine the electric energy conversion
module to provide the single-phase two-wire output or the single-phase three-wire output;

wherein the bridge conversion circuit comprises a full-bridge inverter circuit which comprises:
a first switching element having a first terminal, a second terminal and a control terminal, the first terminal of the first
switching element being coupled with the second terminal of the first bus capacitor;

a second switching element having a first terminal, a second terminal and a control terminal, the first terminal of the second
switching element being coupled with the first terminal of the first switching element;

a third switching element having a first terminal, a second terminal and a control terminal, the second terminal of the third
switching element being coupled with the second terminal of the second bus capacitor;

a fourth switching element having a first terminal, a second terminal and a control terminal, the second terminal of the fourth
switching element being coupled with the second terminal of the third switching element;

a fifth switching element having a first terminal, a second terminal and a control terminal, the first terminal of the fifth
switching element being coupled with the second terminal of the first bus capacitor;

a sixth switching element having a first terminal, a second terminal and a control terminal, the first terminal of the sixth
switching element being coupled with the second terminal of the first switching element and the first terminal of the fifth
switching element, and the second terminal of the sixth switching element being coupled with the first terminal of the third
switching element; and

a seventh switching element having a first terminal, a second terminal and a control terminal, the first terminal of the seventh
switching element being coupled with the second terminal of the fifth switching element, and the second terminal of the seventh
switching element being coupled with the second terminal of the second switching element and the first terminal of the fourth
switching element.

US Pat. No. 9,959,971

INDUCTOR AND CONVERTER HAVING THE SAME

Delta Electronics (Shangh...

1. A converter, comprising an inductor having a current sampling function, wherein the converter is configured to obtain a current detection signal of the converter by a sampling part of the inductor, and the inductor comprises:a magnetic core comprising at least one window; and
at least one winding provided within the at least one window, wherein the at least one winding comprises a main body part and the sampling part, the main body part has a first end and a second end, the sampling part has a first end and a second end, the first end of the sampling part is connected to the second end of the main body part such that the main body part and the sampling part are connected in series, and a length ratio of the sampling part to the main body part is less than 2,
wherein the main body part is formed of a low resistivity conductive material, the sampling part is formed of a low temperature coefficient conductive material, and a current flowing through the inductor is sampled across two ends of the sampling part,
wherein the inductor further comprises a first sampling terminal and a second sampling terminal, the first sampling terminal is connected to the second end of the main body part or the first end of the sampling part, the second sampling terminal is connected to the second end of the sampling part, and the current flowing through the inductor is sampled by the first sampling terminal and second sampling terminal, and
wherein the inductor further comprises a first inductive terminal provided at the first end of the main body part, wherein the second sampling terminal also functions as a second inductive terminal, and the second sampling terminal and the second inductive terminal are the same terminal, have the same size and are commonly used.

US Pat. No. 9,941,805

FREQUENCY AND DUTY CYCLE STRATEGIES FOR DC/DC CONVERTERS

DELTA ELECTRONICS (SHANGH...

1. A method for controlling a direct current to direct current (DC/DC) converter, comprising:correspondingly controlling and maintaining an output voltage of the DC/DC converter to stabilize at a first value according to a first range of an input voltage of the DC/DC converter during a first interval of the input voltage;
correspondingly controlling and keeping the output voltage to stabilize at a second value according to a second range of the input voltage during a second interval of the input voltage, wherein the first interval of the input voltage is directly followed by the second interval of the input voltage;
controlling the second value of the output voltage to be greater than the first value; and
controlling and keeping a switch frequency or a duty cycle of the DC/DC converter within a first predetermined range during the first interval and the second interval,
wherein if the switch frequency is a maximum value of the first predetermined range, when a value of the output voltage is still greater than the first value, adjusting the output voltage to the second value to maintain the switch frequency in the first predetermined range.

US Pat. No. 9,781,804

LIGHT REGULATING APPARATUS WITH FEED FORWARD COMPENSATION AND LIGHT REGULATING METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A light-regulating apparatus, comprising:
a converter configured to generate a load current signal according to a control signal;
a load circuit driven by the load current signal; and
a controller configured to generate the control signal, comprising:
an error computation unit configured to generate a first error signal according to a reference current signal and a feedback
signal;

a regulation unit configured to generate a regulation signal according to the first error signal;
a feed forward compensation unit configured to generate a feed forward compensation signal according to the reference current
signal; and

an addition unit configured to generate the control signal according to the regulation signal and the feed forward compensation
signal;

wherein when the load current signal is regulated, the feed forward compensation signal remains unvaried, and
wherein when the reference current signal is changed, the controller generates the control signal to regulate the load current
signal outputted from the converter, the feed forward compensation unit generates the feed forward compensation current to
the addition unit and the regulation unit halts to output the regulation signal to the addition unit; when the controller
regulates the load current signal to a setting current, the regulation unit output the regulation signal to the addition unit.

US Pat. No. 9,744,629

POWER SUPPLY AND METHOD FOR ASSEMBLING POWER SUPPLY

DELTA ELECTRONICS (SHANGH...

1. A power supply, comprising:
a housing having a plurality of inner corner vertices and a plurality of sealing elements respectively disposed at the inner
corner vertices;

a power module disposed in the housing;
a top cover disposed above the housing;
a sealing sheet at least partially disposed between the housing and the top cover, wherein the sealing sheet substantially
covers a cavity of the housing; and

a filling member disposed between the housing and the sealing sheet.

US Pat. No. 10,117,334

MAGNETIC ASSEMBLY

DELTA ELECTRONICS (SHANGH...

1. A magnetic assembly comprising:a first magnetic core having a first top surface, a first bottom surface, a first sidewall, a second sidewall, at least one first sidewall through-hole and at least one second sidewall through-hole, wherein the at least one first sidewall through-hole is disposed on the first sidewall, the at least one second sidewall through-hole is disposed on the second sidewall, and the first sidewall is opposite to the second sidewall;
a second magnetic core having a second top surface and a second bottom surface, wherein at least a portion of the second bottom surface of the second magnetic core is connected to the first top surface of the first magnetic core by an adhesive layer; and
at least a first series winding having a first upper winding set, a first sidewall winding set, and a second sidewall winding set, wherein the first upper winding set is disposed on the first top surface, the first sidewall winding set is disposed in the first sidewall through-hole, the second sidewall winding set is disposed in the second sidewall through-hole, the first upper winding set is electrically connected to the first sidewall winding set and the second sidewall winding set, so as to form the first series winding around the first magnetic core.

US Pat. No. 10,111,284

LIGHT DRIVING CIRCUIT

DELTA ELECTRONICS (SHANGH...

1. A light driving circuit comprising:a first illuminant unit;
a second illuminant unit;
a power conversion unit configured for generating an output voltage;
a first switching unit coupled to the first illuminant unit, the first illuminant unit being driven by the output voltage to emit light and generate a first output current when the first switching unit is turned on;
a first current sampling unit connected in series with the first switching unit configured for detecting the first output current;
a second switching unit coupled to the second illuminant unit, the second illuminant unit being driven by the output voltage to emit light and generate a second output current when the second switching unit is turned on;
a second current sampling unit connected in series with the second switching unit configured for detecting the second output current; and
a first control unit configured for controlling the first switching unit and the second switching unit to be turned on and turned off according to the first output current and the second output current, respectively,
wherein the power conversion unit comprises:
a first switch;
a second switch connected in series with the first switch;
a resonant circuit having a first terminal and a second terminal, wherein the first terminal is electrically connected between the first switch and the second switch wherein the resonant circuit has a resonant capacitor and a resonant inductor;
a transformer having a primary winding and a secondary winding, and the secondary winding comprises a first secondary winding and a second secondary winding, wherein the second terminal of the resonant circuit is electrically connected to the primary winding;
a first diode and a second diode, anodes of the first diode and the second diode are respectively coupled to the first secondary winding and the second secondary winding, and cathodes of the first diode and the second diode are coupled to the first illuminant unit and the second illuminant unit; and
a second control unit coupled to the first switch and the second switch configured for generating a third control signal according to a feedback signal, the third control signal being configured for controlling working frequencies or duty cycles of the first switch and the second switch so as to adjust the output voltage generated by the power conversion unit.

US Pat. No. 9,871,439

POWER ELECTRONIC CIRCUIT AND POWER MODULE

DELTA ELECTRONICS (SHANGH...

1. A power electronic circuit, comprising:
a reference ground;
a differential mode loop unit having a capacitance component, a switch and an electronic component, wherein the capacitance
component has a first end, the switch has a first end and connects in series with the capacitance component, the electronic
component has a first end, and the electronic component connects in series with the capacitance component and the switch;

a shell; and
a plurality of conversion circuits disposed in the shell, wherein the plurality of conversion circuits have the differential
mode loop unit disposed therein, and the number of the differential mode loop unit is more than one;

wherein the capacitance component and the switch are packaged in a power module, the power module has a trace and at least
one output pin connected to the reference ground, wherein the first end of the switch or the first end of the electronic component
are only connected to the first end of the capacitance component through the trace, and the first end of the capacitance component
is connected to the reference ground through the output pin,

wherein the plurality of conversion circuits comprise a boost circuit and a flyback circuit, wherein
the boost circuit comprises a first transistor switch, a first diode and an output filter capacitor, the first end of the
first transistor switch is electrically connected to the anode of the first diode, the cathode of the first diode is electrically
filter capacitor is electrically connected to the second end of the first transistor switch;

the flyback circuit comprises a second transistor switch and a transformer, the first end of the second transistor is electrically
connected to one end of th primary winding of the transformer, and the other end of the primary winding of the transformer
is electrically connected to the cathode of the first diode and the first end of the output filter capacitor;

wherein the first transistor switch, the first diode, the output filter capacitor and the second transistor switch are packaged
in the power module, and the second end of the output filter capacitor and the second end of the second transistor are both
electrically connected to the output pin.

US Pat. No. 9,859,816

METHOD FOR CONTROLLING MODULATION WAVE AND THREE-PHASE THREE-WIRE THREE-LEVEL CIRCUIT

DELTA ELECTRONICS (SHANGH...

1. A method for controlling a modulation wave, applied in a three-phase three-wire three-level circuit, wherein three bridge
arms of the three-phase three-wire three-level circuit correspond to at least three modulation waves, and the three-phase
three-wire three-level circuit is controlled by comparing the three modulation waves and a carrier wave, comprising:
obtaining a primary modulation wave from the three modulation waves based on the currents corresponding to each phase of the
three-phase three-wire three-level circuit; and

adding a shifting quantity to the three modulation waves such that the primary modulation wave is shifted to a peak value,
a valley value, or a middle value between the peak value and the valley value of the carrier wave, further comprising:

determining polarity of the primary modulation wave to add the shifting quantity to the three modulation waves such that the
primary modulation wave is shifted to the peak value or the valley value of the carrier wave;

if any one of the three modulation waves exceeds the peak value of the carrier wave or falls below the valley value of the
carrier wave after the primary modulation wave is shifted to the peak value or the valley value of the carrier wave, the method
for controlling modulation wave further comprising:

adding the shifting quantity to the three modulation waves such that the primary modulation wave is shifted to the middle
value of the carrier wave.

US Pat. No. 9,887,631

CURRENT SAMPLING METHOD AND CURRENT SAMPLING APPARATUS FOR ISOLATED POWER CONVERTER

Delta Electronics (Shangh...

17. A current sampling method for an isolated power converter, comprising:
providing an isolated power converter comprising at least one isolated transformer;
sampling a total current at a primary side of the isolated transformer to obtain a total sampling current at the primary side
of the isolated transformer;

shunting the total sampling current into an excitation sampling current and a current to be sampled, the excitation sampling
current being in proportion to an excitation current at the primary side of the isolated transformer, and the current to be
sampled being in proportion to a current at a secondary side of the isolated transformer; and

obtaining a sampling of the current of the secondary side of the isolated transformer through a proportion between the current
to be sampled and the current at the secondary side of the isolated transformer.

US Pat. No. 9,867,275

MODULAR POWER SUPPLY AND METHOD FOR MANUFACTURING THE SAME

DELTA ELECTRONICS (SHANGH...

1. A modular power supply, comprising a printed circuit board, power components, and a heat sink, characterized in that, the
heat sink comprises an upper surface which is planar, the power components are mounted on the printed circuit board and disposed
at a side opposite to the heat sink, a lower surface of the printed circuit board is engaged with the upper surface of the
heat sink, with an insulating layer being disposed between the upper surface of the heat sink and the lower surface of the
printed circuit board,
wherein, the power components comprise a semiconductor device, the semiconductor device comprises a case having a bottom and
a top, hot sources of the semiconductor device are located at the bottom, and the bottom is close to the printed circuit board.

US Pat. No. 9,853,571

SECONDARY CONTROL METHOD AND APPARATUS OF PARALLEL INVERTERS IN MICRO GRID

DELTA ELECTRONICS (SHANGH...

1. A secondary control method of parallel inverters in micro grid, comprising:
Step 1: generating a frequency instruction value and an amplitude instruction value of a fundamental voltage in the voltage
instructions of the inverter by using a droop control according to an output voltage and an output current of the inverter,
so as to obtain a fundamental voltage instruction value Vfund;

Step 2: extracting current values of a first AC signal and a second AC signal from the output current of the inverter, extracting
voltage values of the first AC signal and the second AC signal from at least one voltage signal, generating a frequency instruction
value of the first AC signal by using the droop control so as to obtain a voltage instruction value vp* of the first AC signal, and generating a frequency instruction value of the second AC signal by using the droop control
so as to obtain a voltage instruction value vq* of the second AC signal; and

Step 3: regulating the output voltage of the inverter according to the voltage instruction value vp* of the first AC signal, the voltage instruction value vq* of the second AC signal, and the fundamental voltage instruction value Vfund.

US Pat. No. 9,806,010

PACKAGE MODULE AND METHOD OF FABRICATING THE SAME

DELTA ELECTRONICS (SHANGH...

1. A method of fabricating a package module, the method comprising:
placing a pin frame having a plurality of pins on a circuit substrate;
bonding the pins to a plurality of bonding areas on the circuit substrate, thereby connecting the pins to the bonding areas;
cutting off a connecting portion of the pin frame;
varying a cross section of a bending portion of each of the pins, wherein the bending portion has at least one recess portion,
the recess portion is located at an inner side of the bending portion, and the recess portion is a triangular groove or a
zigzag groove, wherein a depth of the recess portion is not greater than one half of a thickness of the bending portion;

bending the pins to be substantially vertical to the circuit substrate;
mounting an outer housing to the circuit substrate, wherein the outer housing has a plurality of through holes; and
penetrating the pins through the through holes, wherein a pin body of each of the pins is protruded from the outer housing,
and a bending portion of each of the pins is covered by the outer housing.

US Pat. No. 10,129,949

LIGHTING SYSTEM, POWER DRAWING DEVICE USING SINGLE LIVE WIRE AND METHOD FOR CONTROLLING THE SAME

Delta Electronics (Shangh...

1. A power drawing device using a single live wire, comprising:a first mechanical switch, having a first contact at a first side of the first mechanical switch connected to an input terminal of the live wire, a third contact at a second side of the first mechanical switch connected to a first terminal of a first light adjusting circuit, and a fifth contact at the second side of the first mechanical switch connected to a first output terminal of the live wire and a second terminal of the first light adjusting circuit;
a second mechanical switch, having a first contact at a first side of the second mechanical switch connected to the input terminal of the live wire, a third contact at a second side of the second mechanical switch connected to a first terminal of a second light adjusting circuit, a fifth contact at the second side of the second mechanical switch connected to a second output terminal of the live wire and a second terminal of the second light adjusting circuit, and a sixth contact at the second side of the second mechanical switch connected to a second contact at the first side of the first mechanical switch; and
a power drawing circuit, having a first terminal connected to the input terminal of the live wire, a second terminal connected to a second contact at the first side of the second mechanical switch, a third terminal connected to a third terminal of the first light adjusting circuit, and a fourth terminal connected to a third terminal of the second light adjusting circuit.

US Pat. No. 10,032,553

TRANSFORMER UNIT AND POWER CONVERTER CIRCUIT

Delta Electronics (Shangh...

1. A transformer unit comprising:a first secondary wiring layer comprising a first secondary winding;
a second secondary wiring layer adjacent to the first secondary wiring layer and comprising a second secondary winding, a first end of the second secondary winding being connected to a first end of the first secondary winding via at least one first via hole; and
a plurality of primary wiring layers comprising at least one primary winding, the first secondary wiring layer and the second secondary wiring layer being disposed between the plurality of primary wiring layers,
wherein at least one of the first via hole is disposed within a projection of the primary winding in the plurality of primary wiring layers.

US Pat. No. 9,887,547

METHOD AND APPARATUS FOR DECOUPLING THE POWER OF GRID-CONNECTED INVERTER

DELTA ELECTRONICS (SHANGH...

1. A method for controlling an output power of an inverter, the inverter being electrically connected to a power grid, wherein
the control method comprises the following steps:
obtaining an amplitude feedforward amount Eff and a phase feedforward amount ?ff according to a grid voltage of the power grid, an output voltage of the inverter, and a phase difference ? between the output
voltage of the inverter[0] and the grid voltage, using the following Equation:


wherein U is an amplitude of the grid voltage, E is an amplitude of the output voltage of the inverter, ?E is a variation
of the amplitude E of the output voltage of the inverter during two adjacent control periods, ?? is a variation of the phase
difference ? during two adjacent control periods; and

controlling the output power of the inverter according to the amplitude feedforward amount Eff and the phase feedforward amount ?ff.

US Pat. No. 10,123,428

PACKAGE MODULE

DELTA ELECTRONICS (SHANGH...

1. A package module, comprising:a circuit board;
an electronic component disposed on the circuit board;
a frame disposed next to at least one side of the electronic component, wherein a gap is formed between the frame and the electronic component; and
an encapsulant comprising a first portion covering at least a part of the circuit board and a second portion filling into at least a part of the gap, the first portion being connected to the second portion, the first portion and the second portion being located on two opposite sides of the frame respectively, the first portion being in contact with the frame, the second portion being in contact with the frame and the electronic component, the first portion having a first height relative to the circuit board, the second portion having a second height relative to the circuit board, wherein the first height and the second height are from highest positions of the first portion and the second portion to the circuit board respectively, a distance between a bottom end of the frame and the circuit board is less than the first height and the second height is greater than the first height;
a housing, wherein the electronic component, the frame, and the encapsulant are in the housing; and
wherein the housing comprises an encapsulant injection port, wherein a vertical projection of the encapsulant injection port onto the circuit board is not overlapped with the electronic.

US Pat. No. 10,109,569

VIA STRUCTURE AND CIRCUIT BOARD HAVING THE VIA STRUCTURE

Delta Electronics (Shangh...

1. A via structure, provided in two or more conductor layers in the same electrical network, the conductor layers overlapping with each other vertically and comprising at least one current input layer and at least one current output layer;wherein the via structure comprises a plurality of rows of vias, each row of vias puncture through at least one current input layer and at least one current output layer, an in-out ratio of each row of vias is (A+1)/A, where A is a positive integer.

US Pat. No. 9,899,870

POWER SUPPLY SYSTEM AND METHOD FOR SUPPLYING POWER

DELTA ELECTRONICS (SHANGH...

1. A power supply system, comprising:
an isolating circuit comprising an input terminal and an output terminal, wherein the input terminal of the isolating circuit
is configured to connect with a second input source and receive alternating current or direct current outputted from the second
input source;

a first converting circuit comprising an input terminal and an output terminal, wherein the input terminal of the first converting
circuit is configured to connect with a first input source and the output terminal of the isolating circuit, and the first
converting circuit is configured to convert electricity to output an outputting direct current; and

an auxiliary power supply circuit comprising at least one master auxiliary power supply and at least one slave auxiliary power
supply, wherein each of the at least one master auxiliary power supply and the slave auxiliary power supply comprises at least
one input terminal and at least one output terminal, and is configured to supply power to a control circuit.

US Pat. No. 9,893,525

HIGH-POWER CONVERSION SYSTEM

DELTA ELECTRONICS (SHANGH...

1. A high-power conversion system, including a switching circuit and at least one reactor, the at least one reactor being
electrically connected to the switching circuit, characterized in that core of the at least one reactor is electrically connected
to a potential point of the high-power conversion system, wherein said potential point is ungrounded.

US Pat. No. 10,128,181

PACKAGE STRUCTURE AND FABRICATING METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A package structure, comprising:a first carrier plate, wherein at least a power component is disposed on a first top surface of the first carrier plate, and a bottom surface of the power component is disposed on the first top surface of the first carrier plate;
a second carrier plate disposed on the first top surface of the first carrier plate, wherein a driving circuit is disposed on a second top surface of the second carrier plate for driving the power component, wherein at least an opening runs through the second carrier plate and corresponds to the power component, and the power component is accommodated within the opening when the second carrier plate is disposed on the first top surface of the first carrier plate;
a pin group assembled on the first carrier plate and/or the second carrier plate, wherein the pin group comprises a first pin group and a second pin group; and
an encapsulant member encapsulating the first carrier plate, the second carrier plate, a part of the first pin group and a part of the second pin group, so that the first pin group and the second pin group are partially exposed outside the encapsulant member;
wherein the trace density of the second carrier plate is higher than the trace density of the first carrier plate, and the second carrier plate is used to carry the driving circuit, but is not used to form the pins;
wherein the power component is directly disposed on the first carrier plate through a first bonding material when the power component is accommodated within the opening;
wherein the power component is a power chip, and a top surface of the power chip is not higher than the second top surface of the second carrier plate.

US Pat. No. 10,122,474

COMMUNICATION SYSTEM FOR CASCADE TYPE POWER CONVERSION DEVICE

DELTA ELECTRONICS (SHANGH...

1. A communication system for a cascade type power conversion device, each phase of the cascade type power conversion device comprising a plurality of power modules connected in series and the communication system, wherein the communication system comprises:a plurality of low voltage communication units connected in series and disposed in the power modules respectively; and
a plurality of optical fibers connected between at least one of the low voltage communication units and a master control system of the cascade type power conversion device.

US Pat. No. 10,084,393

CASCADE CONVERTER SYSTEM AND METHOD OF PUTTING CONVERTER MODULE OF THE SAME INTO OPERATION

Delta Electronics (Shangh...

1. A method of putting a converter module of a cascade converter system into operation, wherein the cascade converter system comprises:n converter modules, wherein n>1, each of the converter modules comprises a first terminal, a power conversion circuit, a second terminal and a module controller, the first terminal is electrically connected to the power conversion circuit, the power conversion circuit is electrically connected to the second terminal, the power conversion circuit contains at least one DC bus capacitor, and the module controller is configured to control the power conversion circuit;
n bypass switch modules, wherein the n bypass switch modules are connected in series and electrically connected to an AC power source, and the first terminals of the n converter modules are correspondingly connected in parallel with the n bypass switch modules, respectively; and
a system controller, at least configured to control the n bypass switch modules to be in a bypass state or a non-bypass state,
wherein the method comprises:
a module pre-plug-in step: m bypass switch modules of the n bypass switch modules being in a non-bypass state, and remaining n-m bypass switch modules being in a bypass state, and the system controller communicating with the module controllers of the m non-bypassed converter modules, such that the m non-bypassed converter modules operate according to a first control signal, wherein 1?m a module plug-in step: the system controller controlling the (m+1)th bypass switch module to change from the bypass state to the non-bypass state; and
a module post-plug-in step: the system controller communicating with the module controllers of the m+1 non-bypassed converter modules, such that the m+1 non-bypassed converter modules operate according to a second control signal.

US Pat. No. 9,954,429

CONVERTER AND VOLTAGE CLAMP CIRCUIT THEREIN

DELTA ELECTRONICS (SHANGH...

1. A converter comprising:a first bridge arm comprising a first switch unit and a second switch unit electrically coupled in series at an output terminal;
a second bridge arm comprising a first voltage source and a second voltage source electrically coupled in series at a neutral point terminal, wherein the first voltage source and the second voltage source are arranged between a positive input terminal and a negative input terminal;
a third switch unit and a fourth switch unit electrically coupled in series at a common connection terminal and arranged between the neutral point terminal and the output terminal;
a voltage clamp circuit comprising:
a sharing circuit, electrically coupled to the output terminal, the common connection terminal and the neutral point terminal, wherein the sharing circuit is configured to clamp voltages across the third switch unit and the fourth switch unit, and the sharing circuit comprises a first capacitor coupled between a node and the common connection terminal to store a clamping voltage; and
an active circuit comprising a DC-to-DC converter electrically coupled to the sharing circuit at the node and the common connection terminal,
wherein the DC-to-DC converter comprises at least a fifth switch and a second capacitor, wherein the fifth switch is electrically coupled to the first capacitor and the second capacitor, the DC-to-DC converter is configured to output an operation voltage, via the second capacitor, to one of the positive input terminal, negative input terminal, the output terminal, and a driving circuit, according to the clamping voltage, wherein the driving circuit is configured to drive the third switch unit or the fourth switch unit.

US Pat. No. 9,893,625

DIRECT CURRENT TO DIRECT CURRENT POWER SUPPLY APPARATUS

DELTA ELECTRONICS (SHANGH...

1. A direct current to direct current (DC/DC) power supply apparatus, comprising:
a plurality of power boards coupled in parallel with one another, wherein each power board comprises a carrier circuit board
and a power device disposed on the carrier circuit board, wherein the power device comprises a power circuit and a transformer,
wherein the power circuit comprises a plurality of power switches disposed at a primary side and a secondary side of the transformer
for controlling the transformer;

a control board electrically coupled to the power boards and comprising a feedback control circuit and a pulse width modulation
(PWM) generator circuit, wherein the feedback control circuit is configured to receive one or more feedback signals from the
power boards, and the PWM generator circuit outputs a PWM driving control signal to the power boards to drive the plurality
of power switches based on the feedback signals; and

a main board electrically coupled to the power boards and the control board,
wherein the power boards and the control board are vertically mounted on the main board and physically separated from each
other.

US Pat. No. 9,887,534

POWER CONVERTER, SHORT-CIRCUIT DETECTING DEVICE THEREOF AND SHORT-CIRCUIT DETECTING METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A short-circuit detecting device, comprising:
a coil configured to detect a variation of magnetic flux intensity generated by a current variation of a current flowing through
a power semiconductor switch unit and configured to generate an induced electromotive force based on the variation of magnetic
flux intensity, wherein the coil is different from a current transformer, and the current does not flow through the coil;
and

a processing circuit configured to generate a short-circuit signal based on the induced electromotive force when an current
variation rate of the current is greater than a predetermined value, so as to turn off the power semiconductor switch unit
based on the short-circuit signal.

US Pat. No. 10,148,164

TOPOLOGY OF COMPOSITE CASCADED HIGH-VOLTAGE AND LOW-VOLTAGE MODULES

Delta Electronics (Shangh...

1. A topology of composite cascaded high-voltage and low-voltage modules, comprising:at least one high-voltage module, comprising a high-voltage bus capacitor;
at least one low-voltage module, comprising a low-voltage bus capacitor; wherein the at least one low-voltage module is connected with the at least one high-voltage module in a cascade manner, and a low-voltage direct current (DC) bus voltage of the low-voltage bus capacitor is lower than a high-voltage DC bus voltage of the high-voltage bus capacitor;
at least one local control circuit, for outputting at least one control signal to at least one high-voltage driving circuit and at least one low-voltage driving circuit;
the at least one high-voltage driving circuit, electrically connected with a corresponding power semiconductor switch group of the at least one high-voltage module, for generating a high-voltage drive signal according to the at least one control signal to drive ON or OFF of the power semiconductor switch group;
the at least one low-voltage driving circuit, electrically connected with a corresponding power semiconductor switch group of the at least one low-voltage module, for generating a low-voltage drive signal according to the at least one control signal to drive ON or OFF of the power semiconductor switch group; and
at least one DC-to-DC module, wherein an input of the at least one DC-to-DC module is connected with two ends of the low-voltage bus capacitor for receiving the low-voltage DC bus voltage and converting the low-voltage DC bus voltage into a DC output voltage, so as to provide one or more of the at least one high-voltage driving circuit, the at least one low-voltage driving circuit and the at least one local control circuit with a power supply.

US Pat. No. 10,116,227

SYSTEM AND METHOD FOR PULSE DRIVING FOR REDUCING NUMBER OF OPTICAL FIBERS

Delta Electronics (Shangh...

1. A pulse driving system for driving a multi-level converter which comprises at least M power switches, where M?2, wherein the pulse driving system comprises:a main control module generating encoding information which contains driving information according to sampling information;
a local control module electrically coupled to the multi-level converter to output control signals to the multi-level converter so as to control on and off of the at least M power switches in the multi-level converter; and
a first optical fiber coupled to the main control module and the local control module, wherein the local control module receives the encoding information output from the main control module via the first optical fiber and generates the control signals according to the encoding information;
wherein the main control module comprises:
a data processing unit receiving the sampling information of the multi-level converter and outputting the driving information by a control algorithm;
a first control unit electrically coupled with the data processing unit to receive and encode the driving information and output the encoding information.

US Pat. No. 10,056,821

POWER CONVERSION SYSTEM AND METHOD FOR SUPPRESSING THE COMMON-MODE VOLTAGE THEREOF

DELTA ELECTRONICS (SHANGH...

1. A power conversion system, characterized in that the power conversion system comprises:a grid-side converter;
a motor-side converter;
a bus capacitor, the bus capacitor being electrically connected between the grid-side converter and the motor-side converter;
a first reactor, which includes a first terminal and a second terminal, the first terminal of the first reactor being electrically connected to the motor-side converter;
a second reactor, which includes a first terminal and a second terminal, the first terminal of the second reactor being electrically connected to the second terminal of the first reactor and the second terminal of the second reactor being electrically connected to a motor;
a third reactor, which includes a first terminal and a second terminal, the first terminal of the third reactor being electrically connected to a grid and the second terminal of the third reactor being electrically connected to the grid-side converter; and
a control means electrically connected to the grid-side converter and the motor-side converter, the control means injecting a first common-mode voltage into a first voltage to output a first control signal, and injecting a second common-mode voltage into a second voltage to output a second control signal, so as to reduce a common-mode voltage of the power conversion system.

US Pat. No. 10,014,232

PACKAGING SHELL AND A POWER MODULE HAVING THE SAME

DELTA ELECTRONICS (SHANGH...

13. A power module, installed on a system circuit board and connected with a heat-sink at the same time, comprising:a plurality of electronic components;
a substrate, wherein all the electronic components are mounted on the same surface of the substrate;
a packaging shell, comprising:
an accommodating recess providing space for the electronic components being assembled with the substrate; and
a stepped surface surrounding the bottom edge of the accommodating recess for positioning the substrate, wherein the stepped surface has a bigger than normal flatness difference so as to form a curve outline opposing and contacting with the substrate to buffer the stress the substrate subjected during the process of the power module and the packaging shell assembled with another object; and
a seal adhesive, adhering to the stepped surface and the substrate so as to sealing up the substrate and the packaging shell,
wherein the substrate is a smiling-like shape and has a warpage within a predetermined range, and the flatness difference of the stepped surface matches with the warpage of the substrate.

US Pat. No. 10,009,024

POWER CONVERSION DEVICE, DRIVING DEVICE AND DRIVING METHOD

DELTA ELECTRONICS (SHANGH...

1. A driving device, comprising:a driving primary circuit configured to receive a control signal and a power signal, wherein the driving primary circuit is configured to generate a driving pulse signal based on the control signal, and generate a power pulse signal based on the power signal;
an isolating transforming circuit configured to be coupled to the driving primary circuit, wherein the isolating transforming circuit comprises a first isolating transforming unit and a second isolating transforming unit, wherein the first isolating transforming unit comprises a plurality of first pulse transformers, or a second pulse transformer, or a plurality of third pulse transformers, and the second isolating transforming unit comprises a plurality of fourth pulse transformers, or a fifth pulse transformer, or a plurality of sixth pulse transformers;
wherein each one of the first pulse transformers comprises a primary winding and a secondary winding, and the primary windings of the first pulse transformers are electrically coupled to the driving primary circuit, wherein the primary windings of the first pulse transformers are sequentially connected to each other in series;
wherein the second pulse transformer comprises a primary winding and a plurality of secondary windings, and the primary winding is electrically coupled to the driving primary circuit;
wherein one of the third pulse transformers comprises a primary winding and a secondary winding, another one of the third pulse transformers comprises a primary winding and a plurality of secondary windings, and the primary windings of the third pulse transformers are electrically coupled to the driving primary circuit, wherein the primary windings of the third pulse transformers are sequentially connected to each other in series;
wherein each one of the fourth pulse transformers comprises a primary winding and a secondary winding, and the primary windings of the fourth pulse transformers are electrically coupled to the driving primary circuit, wherein the primary windings of the fourth pulse transformers are sequentially connected to each other in series;
wherein the fifth pulse transformer comprises a primary winding and a plurality of secondary windings, and the primary winding is electrically coupled to the driving primary circuit;
wherein one of the sixth pulse transformers comprises a primary winding and a secondary winding, another one of the sixth pulse transformers comprises a primary winding and a plurality of secondary windings, and the primary windings of the sixth pulse transformers are electrically coupled to the driving primary circuit, wherein the primary windings of the sixth pulse transformers are sequentially connected to each other in series; and
at least one driving secondary circuit configured to be coupled to the secondary windings, wherein the driving primary circuit transmits the driving pulse signal through the second isolating transforming unit and transmits the power pulse signal through the first isolating transforming unit to the at least one driving secondary circuit, wherein the at least one driving secondary circuit receives the driving pulse signal and generates a driving signal based on the driving pulse signal for driving a power semiconductor switch unit,
wherein the driving primary circuit comprises:
a driving signal generating unit configured to receive the control signal, and generate the driving pulse signal based on the control signal; and
a driving primary power circuit configured to be coupled to the driving signal generating unit, wherein the driving primary power circuit receives the power signal and generates a driving primary power and the power pulse signal based on the power signal, wherein the driving primary power circuit is configured to provide the driving primary power for the driving signal generating unit;
wherein the at least one driving secondary circuit comprises:
a driving signal receiving unit configured to be coupled to the second isolating transforming unit, wherein the driving signal generating unit transmits the driving pulse signal to the driving signal receiving unit through the second isolating transforming unit, wherein the driving signal receiving unit is configured to receive the driving pulse signal and generate the driving signal based on the driving pulse signal so as to drive the power semiconductor switch unit; and
a driving secondary power circuit configured to be coupled to the first isolating transforming unit, wherein the driving primary power circuit transmits the power pulse signal to the driving secondary power circuit through the first isolating transforming unit, wherein the driving secondary power circuit is configured to receive the power pulse signal and generate a driving secondary power based on the power pulse signal so as to provide the driving secondary power for the driving signal receiving unit,
wherein the driving signal generating unit comprises:
a driving signal receiver configured to receive the control signal;
a noise filter configured to be coupled to the driving signal receiver, and configured to receive and filter the noise of the control signal; and
a first pulse modulator configured to be coupled to the noise filter, wherein the first pulse modulator is configured to receive the control signal, and the first pulse modulator is configured to modulate and generate the driving pulse signal based on the control signal.

US Pat. No. 9,953,758

MAGNETIC ELEMENT

DELTA ELECTRONICS (SHANGH...

1. A magnetic element, comprising:a magnetic core comprising:
at least two magnetic columns arranged oppositely, each of the magnetic columns comprising a plurality of first magnetic blocks stacked together, wherein each of the first magnetic blocks is provided with at least one through hole, and the through holes of the first magnetic blocks of each of the magnetic columns are in communication with each other, each of the through holes comprises a middle section located in the respective first magnetic block; and two openings respectively located at two opposite ends of the middle section, and the openings being respectively disposed on two opposite end surfaces of the respective first magnetic block, wherein a maximum caliber of each of the openings is greater than a caliber of the middle section; and
at least two magnetic plates arranged oppositely, respectively covering two opposite end surfaces of each of the magnetic columns to mutually form a closed magnetic flux path with the magnetic columns, and each of the magnetic plates comprising at least one second magnetic block;
at least one winding set binding at least one of the magnetic columns; and
at least one heat conduction pipe disposed in an interior of one of the magnetic columns, and penetrating through the through holes of the first magnetic blocks of each of the magnetic columns.

US Pat. No. 9,882,502

PRE-CHARGE CONTROL METHOD

Delta Electronics (Shangh...

1. A pre-charge control method for a hybrid multilevel power converter, wherein the hybrid multilevel power converter comprises
a first converter, a second converter and a current-limiting resistor unit, the first converter comprises three H-bridge modules,
each of the three H-bridge modules comprises at least one H-bridge circuit, each the H-bridge circuit comprises a first capacitor
unit, and the second converter comprises a second capacitor unit, wherein the three H-bridge modules are electrically connected
with the second converter, and the three H-bridge modules are connected with the AC power by the current-limiting resistor
unit, the pre-charge control method comprising steps of:
(a) controlling the access of the current-limiting resistor unit, and limiting a current outputted from the AC power via the
current-limiting resistor unit, and outputting the current;

(b) controlling the second capacitor unit to bypass, and charging the first capacitor unit using the current;
(c) controlling the access of the second capacitor unit when the first capacitor unit is charged to a third preset voltage,
and allowing the current to charge the first capacitor unit and the second capacitor unit at the same time;

(d) controlling the first capacitor unit to bypass when the second capacitor unit is charged to a fourth preset voltage or
the first capacitor unit is charged to a first preset voltage, and charging the second capacitor unit using the current; and

(e) controlling the access of the first capacitor unit and the current-limiting resistor unit to bypass when the second capacitor
unit is charged to a second preset voltage.

US Pat. No. 9,991,811

CONTROL METHOD AND CONTROL APPARATUS FOR FLYBACK CIRCUIT

DELTA ELECTRONICS (SHANGH...

16. A control apparatus for a Flyback circuit, the Flyback circuit including a primary switch, a secondary rectifier unit, a transformer and an output capacitor, wherein the secondary rectifier unit includes a first terminal and a second terminal, which are electrically connected to the transformer and the output capacitor, respectively, characterized in that the control apparatus is electrically connected to the primary switch and the secondary rectifier unit, and that the primary switch is turned on after the secondary rectifier unit is controlled to be turned on once or twice according to an input voltage, or according to the input voltage and an output power of the Flyback, to achieve zero-voltage-switching of the primary switch.

US Pat. No. 9,989,586

CONVERTER CIRCUIT AND OPEN-CIRCUIT DETECTION METHOD OF THE SAME

DELTA ELECTRONICS (SHANGH...

1. A converter circuit, comprising:a capacitor module;
a plurality of bridge arms, each of the bridge arms electrically connects to the capacitor module in parallel and respectively comprises an upper bridge arm having at least one upper-haft power semiconductor switch and a lower bridge arm having at least one lower-half semiconductor switch, wherein the upper bridge arm and the lower bridge arm electrically connect in series at a middle point;
a voltage measuring module, for electrically connecting to the middle points of the bridge arms, to measure each voltage difference between each two bridge arms; and
an open-circuit detection module, for transmitting a plurality set of testing impulse signals to the upper-half power semiconductor switches and the lower-half power semiconductor switches of the bridge arms, to make at least one of the bridge arms become a upper-conducted bridge arm which is the bridge arm only with a conducted upper bridge arm under a normal operation and at least one of the bridge arms become a lower-conducted bridge arm which is the bridge arm only with a conducted lower bridge arm under the normal operation;
wherein the open-circuit detection module gets the voltage differences of each pair of the upper-conducted and lower-conducted bridge arms from the voltage measuring module, to make comparison with a reference value for generating a comparison result accordingly, and to each pair of the upper-conducted and lower-conducted bridge arms, to further determine operation states of the ought-to-be conducted upper bridge arm and of the ought-to-be conducted lower bridge arm under the normal operation;
the open-circuit detection module further makes comparisons between the operation states determined according to the different sets of the testing impulse signals, to further determine if the upper and lower bridge arms of the bridge arms are actually open circuit.

US Pat. No. 10,148,196

INVERTER AND CONTROL METHOD THEREOF

Delta Electronics (Shangh...

1. An inverter, comprising:a first bridge leg, electrically coupled to a first input node of the inverter and a second input node of the inverter, and comprising a first MOSFET switch, a second MOSFET switch, a third MOSFET switch and a fourth MOSFET switch in sequence, a connection point between the second MOSFET switch and the third MOSFET switch being served as a first node;
a second bridge leg, connected in parallel with the first bridge leg, and comprising a fifth MOSFET switch, a sixth MOSFET switch, a seventh MOSFET switch and an eighth MOSFET switch in sequence, a connection point between the sixth MOSFET switch and the seventh MOSFET switch being served as a second node;
a third bridge leg, electrically coupled between the first node and the second node, and comprising a ninth MOSFET switch, a tenth MOSFET switch, an eleventh MOSFET switch and a twelfth MOSFET switch in sequence;
a first diode, connected in parallel with the first MOSFET switch and the second MOSFET switch, wherein the first MOSFET switch and the second MOSFET switch are in anti-series connection;
a second diode, connected in parallel with the third MOSFET switch and the fourth MOSFET switch, wherein the third MOSFET switch and the fourth MOSFET switch are in anti-series connection;
a third diode, connected in parallel with the fifth MOSFET switch and the sixth MOSFET switch, wherein the fifth MOSFET switch and the sixth MOSFET switch are in anti-series connection;
a fourth diode, connected in parallel with the seventh MOSFET switch and the eighth MOSFET switch, wherein the seventh MOSFET switch and the eighth MOSFET switch are in anti-series connection;
a fifth diode, connected in parallel with the ninth MOSFET switch and the tenth MOSFET switch, wherein the ninth MOSFET switch and the tenth MOSFET switch are in anti-series connection;
a sixth diode, connected in parallel with the eleventh MOSFET switch and the twelfth MOSFET switch, wherein the eleventh MOSFET switch and the twelfth MOSFET switch are in anti-series connection, and are in anti-series connection with the fifth diode;
a first inductor, electrically coupled between the first node and a first output end of the inverter; and
a second inductor, electrically coupled between the second node and a second output end of the inverter,
wherein the first MOSFET switch, the third MOSFET switch, the fifth MOSFET switch, the seventh MOSFET switch, the ninth MOSFET switch and the twelfth MOSFET switch are high-voltage MOSFETs, and the second MOSFET switch, the fourth MOSFET switch, the sixth MOSFET switch, the eighth MOSFET switch, the tenth MOSFET switch and the eleventh MOSFET switch are low-voltage MOSFETs, and
wherein the inverter is configured to perform;
turning on and off the first MOSFET switch, the second MOSFET switch, the seventh MOSFET switch and the eighth MOSFET switch synchronously, and controlling on and off of the ninth MOSFET switch and the tenth MOSFET switch to be complementary with on and off of the first MOSFET switch, the second MOSFET switch, the seventh MOSFET switch and the eighth MOSFET switch;
turning on and off the third MOSFET switch, the fourth MOSFET switch, the fifth MOSFET switch and the sixth MOSFET switch synchronously, and controlling turning on and off of the eleventh MOSFET switch and the twelfth MOSFET switch to be complementary with on and off of the third MOSFET switch, the fourth MOSFET switch, the fifth MOSFET switch and the sixth MOSFET switch;
when the first MOSFET switch, the second MOSFET switch, the seventh MOSFET switch and the eighth MOSFET switch are controlled to be turned on, turning on the first MOSFET switch and the seventh MOSFET switch earlier than the second MOSFET switch and the eighth MOSFET switch, and when the first MOSFET switch, the second MOSFET switch, the seventh MOSFET switch and the eighth MOSFET switch are controlled to be turned off, turning off the first MOSFET switch and the seventh MOSFET switch later than the second MOSFET switch and the eighth MOSFET switch; and
when the third MOSFET switch, the fourth MOSFET switch, the fifth MOSFET switch and the sixth MOSFET switch are controlled to be turned on, turning on the third MOSFET switch and the fifth MOSFET switch earlier than the fourth MOSFET switch and the sixth MOSFET switch, and when the third MOSFET switch, the fourth MOSFET switch, the fifth MOSFET switch and the sixth MOSFET switch are controlled to be turned off, turning off the third MOSFET switch and the fifth MOSFET switch later than the fourth MOSFET switch and the sixth MOSFET switch.

US Pat. No. 10,107,264

MEDIUM VOLTAGE WIND POWER GENERATION SYSTEM AND POWER GENERATION METHOD USING THE SAME

DELTA ELECTRONICS (SHANGH...

1. A medium voltage wind power generation system, comprising:a first boost device, which has a medium voltage side and a high voltage side, the high voltage side of the first boost device being electrically connected to a grid; and
a doubly-fed wind power generation device, wherein the doubly-fed wind power generation device comprises:
at least one wind generator, which comprises stator windings and rotor windings, the stator windings being coupled to the medium voltage side of the first boost device;
at least one rotor side converter, which is coupled to the rotor windings; and
at least one line side converter, one end of which is coupled to the rotor side converter, and the other end of which is coupled to the medium voltage side of the first boost device via a second boost device,
wherein, the stator windings output medium voltage alternating current which is transmitted to the medium voltage side of the first boost device directly through a medium voltage cable.

US Pat. No. 10,097,103

POWER CONVERSION MODULE WITH PARALLEL CURRENT PATHS ON BOTH SIDES OF A CAPACITOR

Delta Electronics (Shangh...

1. A power conversion module, comprising:a substrate comprising a routing layer and an insulating layer, the routing layer comprising a first routing area and a second routing area;
an electronic device provided on the first routing area and electrically connected to the first routing area and the second routing area, respectively;
a vertical type power device provided on the second routing area and electrically connected to the second muting area; and
a capacitor provided on the substrate, disposed between the electronic device and the vertical type power device, and electrically connected to the electronic device and the vertical type power device, respectively;
wherein a first current path and a second current path are formed in the second routing area, respectively, on both sides of the capacitor, being parallel to each other and having a same current direction; a third current path is formed between the electronic device, the capacitor and the vertical type power device, and the third current path is parallel to the first current path and the second current path with an opposite current direction.

US Pat. No. 10,097,110

MODULATION METHOD FOR A THREE-PHASE MULTILEVEL CONVERTER

DELTA ELECTRONICS (SHANGH...

1. A modulation method for a three-phase multilevel converter, comprising the following steps:step 1: generating first three-phase sinusoidal modulated wave signals by a control loop in the three-phase multilevel converter;
step 2: generating second three-phase modulated wave signals by processing the first three-phase sinusoidal modulated wave signals,
wherein in proximity to peak values of a line voltage of the second three-phase modulated wave signals, absolute values of any two phases are unequal;
step 3: generating PWM pulse signals based on the second three-phase modulated wave signals; and
step 4: generating driving signals for respective power units in the three-phase multilevel converter based on the PWM pulse signals.

US Pat. No. 10,084,390

POWER CONVERTER, SHORT CIRCUIT PROTECTION CIRCUIT, AND CONTROL METHOD

Delta Electronics (Shangh...

1. A power converter configured to generate an output voltage comprising:a semiconductor switch configured to adjust the output voltage according to a driving signal;
a short circuit protection circuit configured to generate a short circuit protection signal according to a control signal and a short circuit status of the semiconductor switch; and
a signal processing module electrically coupled to the semiconductor switch and the short circuit protection circuit, and configured to generate the control signal and the driving signal according to a modulating signal and to turn off the semiconductor switch according to the short circuit protection signal;
wherein a delay duration is present between the modulating signal and the control signal, and the semiconductor switch is turned on during the delay duration.

US Pat. No. 10,056,818

SERIES-PARALLEL CONVERTER SYSTEM AND CONTROL METHOD THEREOF

Delta Electronics (Shangh...

1. A series-parallel converter system, comprising:a first set of parallel circuitries comprising a plurality of first circuitries in parallel with each other;
a second set of parallel circuitries comprising a plurality of second circuits in parallel with each other, the second circuit being controlled in a second control method;
wherein an input end of the first set of parallel circuitries and an input end of the second set of parallel circuitries are connected in series with an input power supply; and
wherein the first circuitry in the first set of parallel circuitries comprises:
a first circuit being controlled in a first control method; and
a first control circuitry electrically connected with the first circuit and configured to generate a first control signal for controlling the first circuit based on a variable intercept compensation, and an input voltage, a first output current and a virtual impedance of the first circuit.

US Pat. No. 10,251,240

DC CONCENTRATED ILLUMINATION SYSTEM AND METHOD FOR MEASURING THE STATE OF THE LAMPS THEREOF

Delta Electronics (Shangh...

1. A DC concentrated illumination system, comprising:a DC distribution box configured for converting a command specification that controls the state of the lamps into a voltage signal with a varying amplitude, and outputting the voltage signal via a power line; and
a plurality of lamp units, each of which comprises a lamp, a power conversion unit and a simulated load unit, wherein the power conversion unit is coupled to the lamp and the simulated load unit, and is coupled to the DC distribution box via the power line;
wherein the power conversion unit receives the voltage signal and determines whether the voltage signal matches a preset convention rule; if matches successfully, the power conversion unit collects state information of the lamps; and
the power conversion unit controls the action of the simulated load unit to get a current signal corresponding to the state information of the lamps, the current signal is transmitted back to the DC distribution box via the power line; and the DC distribution box parses the current signal to obtain the state information of the lamps.

US Pat. No. 10,141,838

FREQUENCY JITTERING CONTROL CIRCUIT AND METHOD

DELTA ELECTRONICS (SHANGH...

1. A frequency jittering control circuit comprising:a frequency jittering circuit configured to generate a frequency jittering signal;
a feedback compensation circuit coupled to the frequency jittering circuit to receive the frequency jittering signal and to receive an output signal of a power supply apparatus, wherein the feedback compensation circuit generates a feedback compensation signal in response to the frequency jittering signal and the output signal;
a first comparator having an inverting input terminal, a non-inverting input terminal and an output terminal, wherein the first comparator coupled to the feedback compensation circuit to output a first comparison output signal through the output terminal according to the feedback compensation signal and a reference signal in the inverting input terminal and an oscillation signal in the non-inverting input terminal; and
a control circuit coupled to the first comparator to output a frequency jittering control signal to switch a main switch in the power supply apparatus according to the first comparison output signal, such that the power supply apparatus generates the output signal correspondingly, wherein the frequency jittering control signal generated by the control circuit does not affect the frequency jittering circuit to generate the frequency jittering signal,
wherein the feedback compensation circuit comprises:
a detection unit for receiving the frequency jittering signal and a feedback signal which is derived by detecting the output signal, wherein the detection unit generate a frequency jittering feedback signal by the frequency jittering signal adding the feedback signal;
a third comparator configured to compare the frequency jittering feedback signal with a second reference voltage signal to output a third comparison output signal; and
a feedback unit configured to receive the third comparison output signal, and generate and transmit the feedback compensation signal to the first comparator, wherein the feedback unit comprising an opto-coupler, wherein an input terminal of the opto-coupler is electrically coupled to an output terminal of the third comparator, and an output terminal of the opto-coupler is electrically coupled to the inverting input terminal of the first comparator.

US Pat. No. 10,164,515

DRIVING METHOD FOR POWER SEMICONDUCTOR SWITCHES IN H-BRIDGE CIRCUIT

Delta Electronics (Shangh...

1. A driving method for power semiconductor switches in an H-bridge circuit, wherein the H bridge circuit comprises a first bridge arm, a second bridge arm and a bus capacitor, both the first bridge arm and the second bridge arm are connected to the bus capacitor in parallel, wherein each of the first bridge arm and the second bridge arm comprises an upper power semiconductor switch and a lower power semiconductor switch, an output voltage is generated between a connection point connecting the upper power semiconductor switch with the lower power semiconductor switch in the first bridge arm and a connection point connecting the upper power semiconductor switch with the lower power semiconductor switch in the second bridge arm; the driving method comprises:calculating, by a control circuit of the H-bridge circuit, a start time and an end time, determining, by the control circuit, zero level sections based on the start time and the end time, and outputting, by the control circuit, a control signal in the zero level sections, wherein the start time is a time at which the output voltage changes from a non-zero level to a zero level, the end time is a time at which the output voltage changes from the zero level to the non-zero level, and the zero level sections are durations in which the output voltage is the zero level;
receiving, by a drive circuit of the H-bridge circuit, the control signal, and outputting, by the drive circuit, a driving signal to drive the upper power semiconductor switch of the first bridge arm and the upper power semiconductor switch of the second bridge arm to be on simultaneously or driving the lower power semiconductor switch of the first bridge arm and the lower power semiconductor switch of the second bridge arm to be on simultaneously in the zero level sections;
wherein each of a first preset duration and a second preset duration comprised in a duration of the output voltage of the H-bridge circuit comprises at least one of the zero level sections; the upper power semiconductor switch of the first bridge arm and the upper power semiconductor switch of the second bridge arm and the lower power semiconductor switch of the first bridge arm and the lower power semiconductor switch of the second bridge arm are turned on with a first turning-on logic sequence in the at least one zero level section within the first preset duration; and the upper power semiconductor switch of the first bridge arm and the upper power semiconductor switch of the second bridge arm and the lower power semiconductor switch of the first bridge arm and the lower power semiconductor switch of the second bridge arm are turned on with a second turning-on logic sequence in the at least one zero level section within the second preset duration.

US Pat. No. 10,164,549

POWER MODULE CASCADED CONVERTER SYSTEM

Delta Electronics (Shangh...

1. A power module cascaded converter system, comprising: a control sub-system and a power sub-system, wherein the control sub-system comprises: a master controller and N switch modules that are connected in series, each of the switch modules comprising: a first power port, a first control port, a driver circuit, an optical-electric module and a switch circuit; the power sub-system comprises: N power modules, each of the power modules comprising: a second power port, a second control port and a power conversion circuit, wherein N is an integer greater than one;the first power port of each of the switch modules is electrically connected to the second power port of corresponding one of the power modules;
the master controller is connected to the optical-electric module of each of the switch modules through an optical fiber, and the optical-electric module of each of the switch modules is electrically connected to the first control port, the first control port of each of the switch modules is detachably and electrically connected to the second control port of corresponding one of the power modules, so that the master controller transmits, via the switch modules, control signals with the corresponding power modules; and
the master controller transmits the control signals to the driver circuit of each of the switch modules, so as to control the driver circuit of each of the switch modules to drive the switch circuit of each of the switch modules to close or open, causing the corresponding power module to be bypassed or not bypassed.

US Pat. No. 10,075,057

HYBRID TOPOLOGY POWER CONVERTER AND CONTROL METHOD THEREOF

DELTA ELECTRONICS (SHANGH...

1. A control method of a hybrid topology power converter, the hybrid topology power converter comprising a three-level circuit module and a cascaded H-bridge circuit module, an output side of the three-level circuit module being connected with an input side of the cascaded H-bridge circuit module, the control method comprising steps of:injecting a zero sequence component into a total modulation wave, thereby generating a compensated total modulation wave;
generating a first voltage signal according to the compensated total modulation wave;
generating an H-bridge modulation wave according to the compensated total modulation wave and the first voltage signal; and
generating a three-level driving signal according to the first voltage signal, and generating an H-bridge driving signal according to the H-bridge modulation wave,
wherein a duty cycle of at least one switch element of the three-level circuit module is adjusted according to the three-level driving signal, and a duty cycle of at least one switch elements of the cascaded H-bridge circuit module is adjusted according to the H-bridge driving signal.

US Pat. No. 10,314,178

PACKAGE MODULE

DELTA ELECTRONICS (SHANGH...

1. A package module, comprising:a circuit board;
an electronic component disposed on the circuit board;
a frame disposed next to at least one side of the electronic component, wherein a gap is formed between the frame and the electronic component; and
an encapsulant comprising a first portion covering at least a part of the circuit board and a second portion filling into at least a part of the gap, the first portion being connected to the second portion, the first portion having a first height relative to the circuit board, the second portion having a second height relative to the circuit board,
wherein the first height and the second height are from highest positions of the first portion and the second portion to the circuit board respectively, a distance between a bottom end of the frame and the circuit board is greater than the first height, and the second height is greater than the first height; and
a housing; wherein the electronic component, the frame, and the encapsulant are in the housing; and
wherein the housing comprises an encapsulant injection port; wherein a vertical projection of the encapsulant injection port onto the circuit board is overlapped with the electronic component.

US Pat. No. 10,305,273

PHOTOVOLTAIC SYSTEM AND RAPID SHUTDOWN METHOD THEREOF

Delta Electronics (Shangh...

1. A photovoltaic system comprising at least one photovoltaic array, a junction box and an inverter, the at least one photovoltaic array transferring electric energy to DC side of the inverter via high voltage wires, AC side of the inverter being coupled to a power grid, and the junction box being electrically connected to the inverter for configuring an input lead wire and an output lead wire of the inverter, whereinthe photovoltaic array comprises a photovoltaic array panel and a shutdown device, the shutdown device is electrically connected to the photovoltaic array panel, and is connected to the inverter via the high voltage wires;
the photovoltaic system further comprises a shutdown device controller, which is coupled to the high voltage wires, and is configured for receiving a first detection signal reflecting a state of the AC side of the inverter, determining whether the AC side of the inverter is in a power-off state according to the first detection signal, outputting a first power-off signal when the AC side of the inverter is in the power-off state, and transferring the first power-off signal to the at least one photovoltaic array via the high voltage wires; and
the shutdown device of the photovoltaic array is configured for receiving the first power-off signal, and prohibiting the electric energy from transferring to the inverter according to the first power-off signal,
wherein the shutdown device controller is installed inside the junction box or outside the junction box,
wherein the shutdown device controller comprises:
a first signal terminal configured for receiving the first detection signal reflecting the state of the AC side of the inverter; and
a first communication device electrically connected with the first signal terminal, and configured for determining whether the AC side of the inverter is in the power-off state according to the first detection signal, outputting the first power-off signal when the AC side of the inverter is in the power-off state, and loading the first power-off signal on the high voltage wires,
wherein the first detection signal is an AC voltage outputted from the AC side of the inverter, and when the AC voltage is less than a second threshold value, the first communication device determines that the AC side is in the power-off state.

US Pat. No. 10,243,306

OUTPUT DEVICE INCLUDING DC TRANSMISSION CABLE AND CONNECTOR

DELTA ELECTRONICS (SHANGH...

1. An output device comprising:a dc transmission cable configured to receive and transmit a dc voltage, wherein the dc voltage is between 5 volts to 60 volts; and
a connector connected to an output terminal of the dc transmission cable and configured to receive the dc voltage and output an output voltage, wherein the connector comprises:
a housing;
a dc-dc converter enclosed in the housing and configured to convert the dc voltage to the output voltage; and
an output terminal enclosed in the housing and configured to transmit the output voltage;
wherein the output terminal is further connected to an external device, and the output terminal is configured to transmit a communication signal from the external device to the DC-DC converter while transmitting the output voltage to the external device, the communication signal reflects the state of the external device, and the dc-dc converter is configured to adjust a voltage level of the output voltage correspondingly according to the communication signal.

US Pat. No. 10,234,880

ACTIVE CLAMP CIRCUIT FOR POWER SEMICONDUCTOR SWITCH AND POWER CONVERTER USING THE SAME

Delta Electronics (Shangh...

1. An active clamp circuit for a power semiconductor switch, comprising:a discharging circuit comprising a first terminal and a second terminal, the first terminal of the discharging circuit being electrically connected to a collector of the power semiconductor switch;
an unidirectional blocking circuit;
a first voltage regulator diode connected in series with the unidirectional blocking circuit to form a series branch, the series branch comprising a first terminal and a second terminal, and the first terminal of the series branch being electrically connected to the collector of the power semiconductor switch; and
a resistance-capacitance RC circuit comprising a first terminal and a second terminal, the first terminal of the RC circuit, the second terminal of the discharging circuit, and the second terminal of the series branch being electrically connected, and the second terminal of the RC circuit being electrically coupled to a gate of the power semiconductor switch.

US Pat. No. 10,199,822

VOLTAGE BALANCE CONTROL DEVICE AND VOLTAGE BALANCE CONTROL METHOD FOR FLYING-CAPACITOR MULTILEVEL CONVERTER

DELTA ELECTRONICS (SHANGH...

1. A voltage balance control device for a flying-capacitor multilevel converter, the flying-capacitor multilevel converter including plural flying capacitors, even-numbered switch elements and a filtering inductor, the even-furthered switch elements being serially connected between a positive electrode and a negative electrode of a DC voltage source, the filtering inductor being connected with a middle point of the serially-connected even-numbered switch elements, a first end of each flying capacitor being connected with two adjacent switching elements at a first side of the middle point, a second end of each flying capacitor being connected with two adjacent switching elements at a second side of the middle point, the even-numbered switch elements being operated at the same switching period, the voltage balance control device comprising:a control signal processor generating plural control signals corresponding to the switch elements, thereby controlling on/off states of the switch elements;
a voltage/current detecting unit detecting voltage values of the plural flying capacitors to output a first detecting result, and detecting an operating status of the flying-capacitor multilevel converter to output a second detecting result;
a capacitor voltage balance controller receiving the first detecting result and generating plural first duty cycle differences according to a result of comparing the voltage values of the first detecting result with plural anticipated voltage values of the plural flying capacitors;
a current direction forecasting unit calculating a current direction adjusting signal in each adjusting period according to the voltage value of any selected flying capacitor from the first detecting result and a feedback signal, wherein the feedback signal is related to the duty cycle difference between the duty cycles of the two serially-connected switch elements corresponding to the selected flying capacitor, and the adjusting period is an integer multiple of the switching period; and
a computing unit performing multiplication and/or division on the current direction adjusting signal and the plural first duty cycle differences, thereby generating corresponding second duty cycle differences,
wherein the control signal processor generates the plural control signals according to a reference value, the second detecting result and the plural second duty cycle differences, wherein the voltage values of the plural flying capacitors are maintained at the corresponding anticipated voltage values according to the plural duty cycle signals.

US Pat. No. 10,305,542

METHOD, APPARATUS AND SYSTEM FOR CROSSTALK SUPPRESSION OF POWER LINE COMMUNICATION

Delta Electronics (Shangh...

18. A system for crosstalk suppression of power line communication, comprising: a power line communication transmitter and at least one communication terminal; wherein the at least one communication terminal is connected to the power line communication transmitter via two power lines, respectively;wherein the power line communication transmitter, comprising:
a first receiving unit, configured to receive a joining request message, the joining request message comprising an identifier of the communication terminal;
a first processing unit, configured to determine a matching state of the communication terminal according to a history matching record and the identifier of the communication terminal;
a first sending unit, configured to send a joining response message to the communication terminal when the first processing unit determines that the matching state of the communication terminal is unmatched, the joining response message comprising the identifier of the communication terminal and an identifier of the power line communication transmitter;
wherein the first receiving unit is further configured to receive an acknowledgment request message which is sent by the communication terminal after a switch of the communication terminal is turned on;
a voltage detection unit, configured to detect a voltage on a power line between the communication terminal and an inverter corresponding to the power line communication transmitter, wherein:
the first processing unit is further configured to detect whether the voltage detected by the voltage detection unit is within a preset voltage range and send a detection result to the first sending unit;
the first sending unit is further configured to send an acknowledgment response message to the communication terminal if the detection result of the first processing unit is yes, the acknowledgment response message comprising the identifier of the communication terminal and the identifier of the power line communication transmitter;
the first processing unit is further configured to store the identifier of the communication terminal in the history matching record and store the matching state of the communication terminal as successfully-matched, when the detection result is yes;
wherein the communication terminal, comprising:
the switch provided between a power supply device and the inverter, configured to disconnect or connect a connection between the power supply device and the inverter;
a second sending unit, configured to send the joining request message, the joining request message comprising the identifier of the communication terminal;
a second receiving unit, configured to receive the joining response message which is sent by the power line communication transmitter after determining the matching state of the communication terminal being unmatched;
a verification unit, configured to verify the identifier of the communication terminal in the joining response message;
a second processing unit, configured to store the identifier of the power line communication transmitter in the joining response message and control the switch of the communication terminal to turn on, when verification of the verification unit is passed; wherein:
the second sending unit is further configured to send the acknowledgment request message to the power line communication transmitter;
the second receiving unit is further configured to receive the acknowledgment response message which is sent by the power line communication transmitter after determining that the voltage on the power line between the communication terminal and the inverter corresponding to the power line communication transmitter is within the preset voltage range;
the verification unit is further configured to verify the identifier of the communication terminal and the identifier of the power line communication transmitter in the acknowledgment response message;
the second receiving unit is further configured to store the identifier of the power line communication transmitter in a matching record of the communication terminal when verification for the acknowledgment response message is passed.

US Pat. No. 10,256,739

MULTIUNIT POWER CONVERSION SYSTEM

DELTA ELECTRONICS (SHANGH...

1. A multiunit power conversion system, comprising:a first power conversion unit comprising a first resonant power conversion circuit, wherein the first resonant power conversion circuit comprises a first resonant tank circuit, wherein the first resonant tank circuit comprises a first resonant capacitor and a first resonant inductor connected in series;
a second power conversion unit comprising a second resonant power conversion circuit, wherein the second resonant power conversion circuit comprises a second resonant tank circuit, wherein the second resonant tank circuit comprises a second resonant capacitor and a second resonant inductor connected in series; and
a current sharing transformer comprising a first winding and a second winding magnetically coupled to each other;
wherein the first winding is connected in parallel to the first resonant capacitor and the second winding is connected in parallel to the second resonant capacitor; or the first winding is connected in parallel to the first resonant inductor and the second winding is connected in parallel to the second resonant inductor; or the first winding is connected in parallel to the first resonant capacitor and the first resonant inductor which are connected in series, and the second winding is connected in parallel to the second resonant capacitor and the second resonant inductor which are connected in series.

US Pat. No. 10,263,530

CONVERTER MODULE, TRANSFORMER MODULE AND CIRCUIT THEREOF

Delta Electronics (Shangh...

1. A converter module, comprising:a system board; and
an isolated rectifier unit connected with the system board, the isolated rectifier unit comprising:
a magnetic core comprising at least one core column parallel to the system board and two cover plates provided at both ends of the core column; and
multiple carrier board units provided between the two cover plates and perpendicular to the system board, wherein each of the carrier board units comprises at least one via hole, at least one primary winding and at least one secondary winding; and wherein the at least one core column passes through the via hole of each of the carrier board units, at least one pin is provided at one side of at least one of the carrier board units close to the system board and configured to connect the carrier board units with the system board,
wherein each of the carrier board units further comprises at least one switching device connected with the secondary winding of the carrier board unit, and
wherein the at least one switching device is located on a surface of one of the carrier board units or embedded in one of the carrier board units.

US Pat. No. 10,242,791

COUPLED-INDUCTOR MODULE AND VOLTAGE REGULATING MODULE COMPRISING THE SAME

Delta Electronics (Shangh...

1. A coupled-inductor module comprising:a magnetic core, comprising a first magnetic column, a second magnetic column, and a third magnetic column extending in a first direction and two covers extending in a second direction, wherein the first magnetic column is disposed between the second magnetic column and the third magnetic column, the two covers are respectively connected to two ends of the first magnetic column, two ends of the second magnetic column and two ends of the third magnetic column; and
windings, including a first winding and a second winding respectively wound around the first magnetic column, the first winding and the second winding being spaced apart from each other in the first direction,
wherein the magnetic core is provided with at least one air gap, and the windings and the air gap are not overlapped with each other, and
wherein the magnetic core is formed from two E-shaped cores, wherein the air gap is disposed only on the first magnetic column, or two air gaps are respectively disposed on the second magnetic column and the third magnetic column, or three air gaps are respectively disposed on the first magnetic column, the second magnetic column and the third magnetic column.

US Pat. No. 10,198,020

INTERLEAVED PARALLEL CIRCUIT, INTEGRATED POWER MODULE AND INTEGRATED POWER CHIP

Delta Electronics (Shangh...

1. An interleaved parallel circuit comprising a first bridge arm and a second bridge arm, whereinthe first bridge arm comprises:
a first upper bridge-arm switch comprising a first terminal, a second terminal and a control terminal; and
a first lower bridge-arm switch comprising a first terminal, a second terminal and a control terminal;
wherein the second terminal of the first upper bridge-arm switch is electrically connected to the first terminal of the first lower bridge-arm switch;
the second bridge arm comprises:
a second upper bridge-arm switch comprising a first terminal, a second terminal and a control terminal; and
a second lower bridge-arm switch comprising a first terminal, a second terminal and a control terminal;
wherein the first bridge arm is connected in parallel with the second bridge arm; the second terminal of the second upper bridge-arm switch is electrically connected to the first terminal of the second lower bridge-arm switch;
wherein the first bridge arm and the second bridge arm are at least partly formed in a wafer containing a plurality of first cell groups and a plurality of second cell groups;
wherein the plurality of first cell groups are configured to form the first upper bridge-arm switch of the first bridge arm and the plurality of second cell groups are configured to form the second upper bridge-arm switch of the second bridge arm; and
the plurality of first cell groups and the plurality of second cell groups are switched on and off alternatingly;
wherein the plurality of first cell groups are disposed in a first region of the wafer, and the plurality of second cell groups are disposed in a second region of the wafer;
wherein the first region contains a plurality of first sub-regions, and the second region contains a plurality of second sub-regions, each of the first sub-regions and the second sub-regions is in a stripe shape or a polygon shape, and the first sub-regions and the second sub-regions are arranged alternatively.

US Pat. No. 10,305,388

CONTROL DEVICE AND CONTROL METHOD

Delta Electronics (Shangh...

1. A control device, applied to a flyback converter, the flyback converter comprising an auxiliary switch, the control device comprising:an output voltage integrator, configured to integrate an output voltage of the flyback converter to obtain an amplitude of a negative magnetizing current of the flyback converter;
a comparator controller, configured to compare the obtained amplitude of the negative magnetizing current with a reference value, and turn off the auxiliary switch according to a comparison result; and
a reference calculator, configured to set the reference value based on an input voltage of the flyback converter.

US Pat. No. 10,291,136

CONTROL DEVICE AND CONTROL METHOD

Delta Electronics (Shangh...

1. A control device, applied to a flyback converter comprising an auxiliary switch, comprising:a current detector configured to detect an amplitude of a current of the flyback converter to obtain an amplitude of a negative magnetizing current of the flyback converter;
a comparator controller configured to compare the amplitude of the negative magnetizing current obtained by the current detector with a reference value, and turn off the auxiliary switch according to a comparison result; and
a reference calculator configured to set the reference value based on an input voltage of the flyback converter.

US Pat. No. 10,276,520

SWITCH CIRCUIT PACKAGE MODULE

DELTA ELECTRONICS (SHANGH...

1. A switch circuit package module, comprising:at least a semiconductor switch unit comprising:
a first semiconductor switch element comprising a plurality of parallel connected sub micro-switch elements, each sub micro-switch element configured with a drain electrode and a source electrode; and
a second semiconductor switch element comprising a plurality of parallel connected sub micro-switch elements, each sub micro-switch element configured with a drain electrode and a source electrode; and
at least a capacitor unit comprising a plurality of capacitors;
wherein the semiconductor switch unit comprises a plurality of common electrodes, each common electrode connects the source electrode of one sub micro-switch element in the first semiconductor switch element with the drain electrode of one sub micro-switch element in the second semiconductor switch element and is disposed adjacent to at least one drain electrode from the first semiconductor switch element or one source electrode from the second semiconductor switch element, such that when the capacitors are configured to cooperate with the sub micro-switch element of the first semiconductor switch element or the second semiconductor switch element, impedances of multiple commutation loops between the capacitors and the sub micro-switch element are close to or the same with each other;
wherein the semiconductor switch unit is a one integral chip, the first semiconductor switch element and the second semiconductor switch element are integrated into the one integral chip, the integral chip further comprises a plurality of capacitors integrated in, and each capacitor comprises two electrodes; the two electrodes of each capacitors are electrically connected with a drain electrode of the first semiconductor switch element and a source electrode of the second semiconductor switch element respectively.

US Pat. No. 10,320,188

POWER ADAPTER, POWER DEVICE AND OUTPUT DEVICE

DELTA ELECTRONICS (SHANGH...

1. A power adapter, comprising:an ac-dc converter configured to convert an input ac voltage to an intermediate dc voltage;
at least two output ports configured to output the intermediate dc voltage respectively;
at least two dc transmission cables, wherein a second terminals of the at least two dc transmission cables are detachably connected to the at least two output ports respectively and configured to receive and transmit the intermediate dc voltage respectively; and
at least two connectors, connected to first terminals of the at least two dc transmission cables respectively, wherein each of the at least two connectors comprises:
a first housing;
a dc-dc converter enclosed in the first housing and configured to convert the intermediate dc voltage to an output voltage to an external device; and
an output terminal is detachably connected to the external device to directly transmit the output voltage to the external device, wherein a node of the output terminal enclosed in the first housing is directly connected to the dc-dc converter to receive the output voltage and another node of the output terminal is plugged into the external device to directly transmit the output voltage to the external device,
wherein the at least two connectors are detachably connected to the external devices and provide adjustable output voltages to the external devices respectively.