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公开(公告)号：US20230132524A1
公开(公告)日：2023-05-04
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: H02M1/08 , H02M7/5395
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.
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公开(公告)号：US20190074760A1
公开(公告)日：2019-03-07
申请号：US15919199
申请日：2018-03-12
Applicant: DELTA ELECTRONICS, INC.
Inventor： Lei-Chung HSING , Kuo-Ying LIU
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.
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公开(公告)号：US20230223866A1
公开(公告)日：2023-07-13
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: H02M7/487 , H02M7/5387
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.
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公开(公告)号：US20190316855A1
公开(公告)日：2019-10-17
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: F28F27/00
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.
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公开(公告)号：US20190280578A1
公开(公告)日：2019-09-12
申请号：US16225723
申请日：2018-12-19
Applicant: DELTA ELECTRONICS, INC.
Inventor： Lei-Chung HSING , Chien-Chung SHIH , Yu-Lin SU
Abstract: A bearingless motor is provided. The bearingless motor primarily includes a rotor module and a stator. The rotor module includes a plurality of rotor elements, and the stator includes a housing that forms a receiving space for receiving the rotor module, wherein the rotor module is rotatable relative to the stator.
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Patent Agency Ranking
公开(公告)号：US20240113646A1
公开(公告)日：2024-04-04
申请号：US18098121
申请日：2023-01-18
Applicant: DELTA ELECTRONICS, INC.
Inventor： Yen-Yang CHEN , Jen-Chih TSENG , Lei-Chung HSING
CPC classification number: H02P21/22 , H02P21/14 , H02P2207/05
Abstract: A method of obtaining a parameter of a synchronous motor is disclosed and includes: setting an operating current of the motor; providing a positive fixed voltage to the motor and monitoring a feedback current from the motor; recording a triggering time for the feedback current to reach the operating current; providing a negative fixed voltage to the motor for the triggering time; obtaining a square-wave voltage with a fixed frequency based on the positive fixed voltage and the negative fixed voltage being provided; providing the square-wave voltage with the fixed frequency to one axis of the motor; transforming three-phase current from the motor into an axial current; computing an inductance value of this axis based on the fixed frequency, the square-wave voltage and the axial current; and, creating an inductance-current parameter table based on a plurality of the inductance values and the axial currents correspondingly.
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公开(公告)号：US20240069090A1
公开(公告)日：2024-02-29
申请号：US18151701
申请日：2023-01-09
Applicant: DELTA ELECTRONICS, INC.
Inventor： Kai-Wei HU , Ping-Heng WU , Lei-Chung HSING
CPC classification number: G01R31/2617 , G01R31/52 , H02M5/458
Abstract: A switch short-circuited diagnosis method includes steps of: determining an initial voltage interval of multiple voltage intervals according to voltage relationships between voltages of a first phase wire, a second phase wire, and a third phase wire; performing a switch short-circuited diagnosis of a first bidirectional switch module in the three consecutive voltage intervals from the initial voltage interval, and including steps of: turning on a first switch branch, a second switch branch, or a third switch branch of the first bidirectional switch module according to the voltage relationships between the voltages of the first, second and third phase wires, determining whether an overcurrent occurs to diagnose whether the first switch branch, the second switch branch, or the third switch branch of the first bidirectional switch module is in a short-circuited state, and performing the switch short-circuited diagnosis for the next voltage interval.
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公开(公告)号：US20210067052A1
公开(公告)日：2021-03-04
申请号：US16991750
申请日：2020-08-12
Applicant: DELTA ELECTRONICS, INC.
Inventor： Kai-Wei HU , Lei-Chung HSING
Abstract: An indirect matrix converter includes a rectifier module, an inverter module, and a control unit. The rectifier module includes three parallel-connected T-type bridge arms, and each T-type bridge arm includes a bidirectional switch and a power bridge arm. The power bridge arm includes a first switch and a second switch connected to the first switch in series. One end of the bidirectional switch is coupled to a first AC power source, and the other end thereof is coupled to a common contact between the first switch and the second switch. The control unit outputs a plurality of control signals to control the rectifier module and the inverter module, so that the first AC power source is converted into a second AC power source, or the second AC power source is converted into the first AC power source.
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公开(公告)号：US20230006465A1
公开(公告)日：2023-01-05
申请号：US17720462
申请日：2022-04-14
Applicant: DELTA ELECTRONICS, INC.
Inventor： Kai-Wei HU , Yen-Hsun CHEN , Chia-Tse LEE , Lei-Chung HSING
Abstract: A power supply apparatus is coupled to an AC power source, a critical load, and a general load. The power supply apparatus includes a UPS, a generator system, a power conversion system, and a controller. The power conversion system includes a first power conversion path and a second power conversion path. The first power conversion path is connected to the critical load and an output side, and the second power conversion path is connected to the general load and an input side. The first power conversion path and the second power conversion path are jointly connected to a DC bus. When the controller determines that the AC power source is abnormal, the controller controls disconnecting the AC power source, and activates the UPS to supply power to the critical load so as to enable the first power conversion path and disable the second power conversion path.
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公开(公告)号：US20220231592A1
公开(公告)日：2022-07-21
申请号：US17468919
申请日：2021-09-08
Applicant: DELTA ELECTRONICS, INC.
Inventor： Yi-Wei LIN , Kai-Wei HU , Lei-Chung HSING
Abstract: A power drive circuit includes a power conversion module, a plurality of gate drivers, a waveform processing unit, a control unit, a weighting unit, and a comparator. Each gate driver includes a drive resistance setting value. The waveform processing unit outputs a current absolute value waveform of an AC power. The weighting unit generates a trigger voltage. When the comparator determines that the current absolute value waveform is greater than the trigger voltage, the comparator outputs a slew rate control signal to each of the gate drivers. When the gate driver receives the slew rate control signal, each of the gate drivers decreases the drive resistance setting value of the gate driver.
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