公开(公告)号：US12051982B2

公开(公告)日：2024-07-30

申请号：US17961800

申请日：2022-10-07

Applicant: DELTA ELECTRONICS, INC.

Inventor： Kai-Wei Hu ,  Ping-Heng Wu ,  Lei-Chung Hsing

IPC: H02M7/5387 ,  H02M7/487

CPC classification number: H02M7/487 ,  H02M7/53871

Abstract: A method of clamping an output current of a three-phase power converter is provided. The three-phase power converter includes three switching bridge arms and provides a three-phase output voltage command, and each switching bridge arm has an upper switch and a lower switch connected in series. The method includes steps of: determining that the output current is greater than a first current threshold to activate a current clamping control procedure, comparing a carrier signal with the three-phase output voltage command to turn on the lower switches by a first zero vector when the carrier signal is rising and turn on the upper switches by a second zero vector when the carrier signal is falling, determining that the output current is greater than a second current threshold to activate an overcurrent protection procedure, wherein the second current threshold is greater than the first current threshold.

公开(公告)号：US11870382B2

公开(公告)日：2024-01-09

申请号：US17577953

申请日：2022-01-18

Applicant: Delta Electronics, Inc.

Inventor： Ping-Heng Wu ,  Kai-Wei Hu ,  Lei-Chung Hsing

IPC: H02M5/27 ,  H02M1/12 ,  H02P27/16 ,  H02M5/293 ,  H02M1/42

CPC classification number: H02P27/16 ,  H02M1/4216 ,  H02M5/2932

Abstract: A matrix power conversion device including a plurality of three-phase switching modules and a controller is provided. Each three-phase switching module includes a plurality of bidirectional switches connected to the input phase voltages of the three-phase input power respectively and outputs a corresponding output phase voltage of the three-phase output power. The controller determines a maximum voltage, an intermediate voltage and a minimum voltage among all the input phase voltages to acquire a waveform of a control carrier wave in a switching cycle. The controller acquires output expected values corresponding to all output phase voltages and compares them with the waveform of the control carrier wave for acquiring a turning-on time of each of the plurality of bidirectional switches. Accordingly, the controller controls the matrix power conversion device to switch the three-phase input power so as to change the three-phase output power for driving the motor.

公开(公告)号：US11711029B2

公开(公告)日：2023-07-25

申请号：US17687076

申请日：2022-03-04

Applicant: DELTA ELECTRONICS, INC.

Inventor： Ping-Heng Wu ,  Kai-Wei Hu ,  Lei-Chung Hsing

IPC: H02M7/5395 ,  H02M1/08 ,  H02M1/14

CPC classification number: H02M7/5395 ,  H02M1/083 ,  H02M1/14

Abstract: A method of controlling a power converter is provided. The power converter generates a three-phase output power by switching an input power through a plurality of switches. The method includes steps of: acquiring a three-phase output command corresponding to the three-phase output power; comparing the three-phase output command with a control carrier to acquire a voltage phase angle corresponding to the three-phase output command; acquiring a three-phase current value of the three-phase output power; detecting the voltage phase angle and a positive/negative change of the three-phase current value to decide a zero-sequence voltage; composing the zero-sequence voltage and the three-phase output command to acquire a three-phase output expected value; comparing the three-phase expected values with the control carrier to acquire a turned-on time of each switch; and switching the input power to adjust the three-phase output power according to the turned-on time of each switch.

公开(公告)号：US10804024B2

公开(公告)日：2020-10-13

申请号：US15994007

申请日：2018-05-31

Applicant: Delta Electronics, Inc.

Inventor： Tsung-Nan Kuo ,  Lei-Chung Hsing

IPC: H01F27/28 ,  H01F27/245 ,  H01F3/14 ,  H01F30/12 ,  H02K3/28 ,  H01F27/30 ,  H01F3/10 ,  H01F27/38 ,  H01F37/00 ,  H01F17/00

Abstract: An integrated magnetic element is provided, including a first magnetic-core frame, three second magnetic-core frames, and three coil windings. The first magnetic-core frame has a first side pillar and a second side pillar opposite to the first side pillar. The three second magnetic-core frames are arranged on the side corresponding to the first side pillar of the first magnetic-core frame, and are arranged in parallel with the axis of the first side pillar of the first magnetic-core frame. Each of the second magnetic-core frames has a first side pillar adjacent to the first side pillar of the first magnetic-core frame, and a second side pillar opposite to the first side pillar of itself. The three coil windings connect to a three-phase grid, and wind around the first side pillar of the first magnetic-core frame and the corresponding first side pillar of the second magnetic-core frame respectively.

公开(公告)号：US20240412916A1

公开(公告)日：2024-12-12

申请号：US18811096

申请日：2024-08-21

Applicant: Delta Electronics, Inc.

Inventor： Tsung-Nan Kuo ,  Lei-Chung Hsing

IPC: H01F27/24 ,  H01F3/14 ,  H01F27/26 ,  H01F27/28 ,  H01F27/30

Abstract: A magnetic element includes a first magnetic core, a second magnetic core, a first winding and a second winding. The first magnetic core includes a first lateral core part, a second lateral core part and a first middle core part between the first and second lateral core parts. The second magnetic core includes a third lateral core part, a fourth lateral core part and a second middle core part between the third lateral core part and the fourth lateral core part. The second middle core part, third lateral core part, and fourth lateral core part are respectively located beside the first middle core part, first lateral core part, and second lateral core part. The first winding is wound around the first middle core part and the second middle core part. The second winding is wound around the second lateral core part and the fourth lateral core part.

公开(公告)号：US20240322729A1

公开(公告)日：2024-09-26

申请号：US18403676

申请日：2024-01-03

Applicant: Delta Electronics, Inc.

Inventor： Kai-Wei Hu ,  Yi-Jui Chen ,  Chih-Hung Chen ,  Lei-Chung Hsing

IPC: H02P27/06 ,  H02M1/32 ,  H02M7/00 ,  H02M7/5387

CPC classification number: H02P27/06 ,  H02M1/327 ,  H02M7/003 ,  H02M7/53871

Abstract: A motor driver is provided. The motor driver includes an AC/DC converter, a DC/AC converter, a heat dissipation plate and a busbar module. The AC/DC converter converts an AC input power to a DC power and includes a first thermal module, a second thermal module, a first capacitor pack and a second capacitor pack. The DC/AC converter is connected with the AC/DC converter, converts the DC power to an AC output power, and includes a third thermal module. The heat dissipation plate includes an upper surface and a lower surface. The first thermal module is disposed on the upper surface. The second thermal module and the third thermal module are disposed on two opposite surfaces, respectively. The first capacitor pack is disposed on the upper surface. The second capacitor pack is disposed on the lower surface and corresponding to the first capacitor pack.

公开(公告)号：US20230067581A1

公开(公告)日：2023-03-02

申请号：US17577953

申请日：2022-01-18

Applicant: Delta Electronics, Inc.

Inventor： Ping-Heng Wu ,  Kai-Wei Hu ,  Lei-Chung Hsing

IPC: H02P27/16 ,  H02M5/293 ,  H02M1/42

Abstract: A matrix power conversion device including a plurality of three-phase switching modules and a controller is provided. Each three-phase switching module includes a plurality of bidirectional switches connected to the input phase voltages of the three-phase input power respectively and outputs a corresponding output phase voltage of the three-phase output power. The controller determines a maximum voltage, an intermediate voltage and a minimum voltage among all the input phase voltages to acquire a waveform of a control carrier wave in a switching cycle. The controller acquires output expected values corresponding to all output phase voltages and compares them with the waveform of the control carrier wave for acquiring a turning-on time of each of the plurality of bidirectional switches. Accordingly, the controller controls the matrix power conversion device to switch the three-phase input power so as to change the three-phase output power for driving the motor.

公开(公告)号：US11118850B2

公开(公告)日：2021-09-14

申请号：US16185428

申请日：2018-11-09

Applicant: Delta Electronics, Inc.

Inventor： Lei-Chung Hsing ,  Hsien-Chih Ou ,  Chun-Chang Huang

IPC: G01R27/28 ,  G01R31/08 ,  G01R31/11 ,  G01R31/00 ,  F28F27/00 ,  G05D23/00 ,  G01R27/04 ,  G01R31/28 ,  G01R27/32 ,  G01R31/317

Abstract: A thermal abnormality detection system includes: a first heat dissipation system having a first temperature sensor for measuring an actual temperature of the first heat dissipation system; a second heat dissipation system having a second temperature sensor for measuring an actual temperature of the second heat dissipation system. Assuming that a difference between the actual temperature of the first heat dissipation system and an upper limit temperature of the first heat dissipation system is d1, and a difference between the actual temperature of the second heat dissipation system and an upper limit temperature of the second heat dissipation system is d2, when a value of d1−d2 is greater than an error threshold value Error1_level, the first heat dissipation system is determined to be abnormal, and when the value of d1−d2 is less than an error threshold value Error2_level, the second heat dissipation system is determined to be abnormal.

公开(公告)号：US11002782B2

公开(公告)日：2021-05-11

申请号：US16507969

申请日：2019-07-10

Applicant: Delta Electronics, Inc.

Inventor： Lei-Chung Hsing ,  Hsien-Chih Ou ,  Chun-Chang Huang

IPC: G01R31/26

Abstract: A method for determining failure of a power element for use in an electronic device is provided. The electronic device includes a power element and a detection circuit. The method includes the steps of: obtaining a temperature-calculation model of the power element, and obtaining a parameterized temperature-calculation model of a power-element parameter and a parameterized temperature of the power element; detecting load information and the power-element parameter by the detection circuit; calculating a modeled temperature of the power element according to the load information and the temperature-calculation model, and calculating the parameterized temperature of the power element according to the power-element parameter and the parameterized temperature-calculation model; determining whether an error between the modeled temperature and the parameterized temperature exceeds a permitted range; and determining that the power element has failed in response to the error exceeding the permitted range.

公开(公告)号：US10224804B1

公开(公告)日：2019-03-05

申请号：US15919199

申请日：2018-03-12

Applicant: DELTA ELECTRONICS, INC.

Inventor： Lei-Chung Hsing ,  Kuo-Ying Liu

IPC: H02M1/08 ,  H02M7/537 ,  H02M1/084 ,  H02M1/38 ,  H03K17/16 ,  H02M7/217 ,  H02M7/538 ,  H02M1/32 ,  H02M1/088 ,  H02M7/5395 ,  H02M7/5387

Abstract: A driving circuit includes a power switch driver and a plurality of current-limiting circuits. The power switch driver is configured to output a driving signal according to a switching signal. Each of the current-limiting circuits has an input terminal electrically coupled to a corresponding one of output terminals of the power switch driver respectively. Output terminals of the current-limiting circuits are electrically coupled to a control terminal of a power switch. The power switch driver is configured to selectively output the driving signal to one of a plurality of output terminals according to a load state of the power switch, such that the driving signal is outputted to the control terminal of the power switch via one of the current-limiting circuits.