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公开(公告)号：US11349336B2
公开(公告)日：2022-05-31
申请号：US17131789
申请日：2020-12-23
Applicant: DELTA ELECTRONICS, INC.
Inventor： Yuan-Fang Lai , Hung-Chieh Lin , Chao-Li Kao , Chao-Lung Kuo , Hsin-Chih Chen , Yi-Ping Hsieh
Abstract: A method for operating a power factor correction (PFC) circuit of an uninterruptible power supply (UPS) apparatus is provided. The PFC circuit includes two T-type converters, and each of the T-type converters includes four switching tubes. The method includes: converting AC input voltage into a positive bus voltage across a first capacitor and a negative bus voltage across a second capacitor that is connected in series with the first capacitor when the UPS apparatus is operated under a normal supply mode; and controlling conduction states of the switching tubes of the T-type converters to balance the positive bus voltage and the negative bus voltage when the UPS apparatus is operated under a battery supply mode.
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公开(公告)号：US10734835B2
公开(公告)日：2020-08-04
申请号：US16052914
申请日：2018-08-02
Applicant: DELTA ELECTRONICS, INC.
Inventor： Chao-Li Kao , Hung-Chieh Lin , Chao-Lung Kuo , Yi-Ping Hsieh , Jin-Zhong Huang , Po-Hsin Tseng
Abstract: A power bypass apparatus with a current-sharing function includes at least two bypass switch assemblies and a control unit. Each bypass switch assembly includes a controllable switch, a cooling unit, and a temperature detection unit. Each the temperature detection unit, correspondingly disposed to a heat-dissipating unit, detects a temperature value of the controllable switch to produce a temperature detection signal. The control unit receives the temperature detection signals and outputs at least two switch control signals to control at least one of the controllable switches or outputs at least two cooling unit control signals to control at least one of the cooling units, thus making currents flowing through the controllable switches identical. Accordingly, it is to increase overall efficiency of a power system and implement current-sharing function of the power system providing high power.
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公开(公告)号：US11088629B2
公开(公告)日：2021-08-10
申请号：US16867242
申请日：2020-05-05
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Chao-Li Kao , Yi-Ping Hsieh , Jin-Zhong Huang , Chao-Lung Kuo , Hung-Yu Huang , Chih-Hsien Li
IPC: H02M3/335
Abstract: An isolated converter with high boost ration includes a transformer, a first bridge arm, a second bridge arm, and a boost circuit. The transformer includes a secondary side having a secondary side first node and a secondary side second node. The first bridge arm includes a first diode and a second diode. The second bridge arm includes a third diode and a fourth diode. The boost circuit includes at least one fifth diode coupled between the first bridge arm and the secondary side second node, at least one sixth diode coupled between the second bridge arm and the secondary side first node, and at least two capacitors coupled to the secondary side first node and the secondary side second node.
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公开(公告)号：US11081968B2
公开(公告)日：2021-08-03
申请号：US16698764
申请日：2019-11-27
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Chao-Li Kao , Yi-Ping Hsieh , Jin-Zhong Huang , Chao-Lung Kuo , Hung-Yu Huang , Chih-Hsien Li
IPC: H02M3/335
Abstract: An isolated boost converter includes a transformer, a first bridge arm, a second bridge arm, and a boost circuit. The transformer includes a secondary side having a secondary side first contact and a secondary side second contact. The boost circuit includes two diodes—anodes of the two diodes are mutually coupled to a first contact and cathodes of the two diodes are coupled to a first bridge arm upper contact and a second bridge arm upper contact, two diodes—cathodes of the two diodes are mutually coupled to a second contact and anodes of the two diodes are coupled to a first bridge arm lower contact and a second bridge arm lower contact, the second contact is coupled to the first contact, and at least two capacitors are coupled to the secondary side first contact and the secondary side second contact.
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公开(公告)号：US20250007389A1
公开(公告)日：2025-01-02
申请号：US18243626
申请日：2023-09-07
Applicant: Delta Electronics, Inc.
Inventor： Hsin-Chih Chen , Li-Hung Wang , Chao-Li Kao , Yi-Ping Hsieh , Hung-Chieh Lin
IPC: H02M1/32
Abstract: A circulating current suppression method of a power system having a plurality of power modules is provided. Each power module includes a high-voltage bus, a low-voltage bus and a balance circuit having a neutral voltage. The circulating current suppression method includes: in each balance circuit, disposing a first capacitor electrically coupled between the high-voltage bus and the neutral voltage, and disposing a second capacitor electrically coupled between the neutral voltage and the low-voltage bus; acquiring a current effective value of an input of each power module; if detecting that the current effective value of at least one power module doesn't remain at a current reference value, determining that a circulating current occurs in the at least one power module; and operating the balance circuit of the at least one power module to charge the first capacitor or the second capacitor to regulate the neutral voltage for suppressing the circulating current.
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Patent Agency Ranking
公开(公告)号：US11205956B2
公开(公告)日：2021-12-21
申请号：US16267881
申请日：2019-02-05
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Chao-Li Kao , Yi-Ping Hsieh , Jin-Zhong Huang , Po-Hsin Tseng , Chih-Hsien Li , Hung-Yu Huang
Abstract: A power converter with a common DC power source includes a DC power source and at least two power modules. Each of the power modules is coupled with each other and coupled to the DC power source. Each of the power module includes a coupled inductive component coupled to the DC power source, a DC output conversion unit coupled to the coupled inductive component, and a capacitor group having a coupling point. By using the coupled inductive component, it is to solve the problem of return current between the power modules caused by coupling multiple coupling points to each other.
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公开(公告)号：US10674640B1
公开(公告)日：2020-06-02
申请号：US16264621
申请日：2019-01-31
Applicant: Delta Electronics, Inc.
Inventor： Chao-Li Kao , Jin-Zhong Huang , Yi-Ping Hsieh , Chang-Ye Li
Abstract: An electronic device with heat sink is provided. The heat sink includes a base and fins. One side of the base has a first placement plane and a second placement plane. The electronic device includes a circuit board, a power module and transistors. The power module includes a power body and soldering legs, and the power body is attached to the first placement plane. The transistor has a transistor body and pins, and the transistor body is attached to the second placement plane. The circuit board is disposed at one side of the base formed with the first placement plane, and soldering legs of the power module and pins of the transistor are inserted on the circuit board. Thereby the heat sinks and the space which the circuit board occupied will be reduced for increasing the power density of the heat sink.
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公开(公告)号：US20240364203A1
公开(公告)日：2024-10-31
申请号：US18232721
申请日：2023-08-10
Applicant: Delta Electronics, Inc.
Inventor： Hsin-Chih Chen , Li-Hung Wang , Chao-Li Kao , Yi-Ping Hsieh , Hung-Chieh Lin
CPC classification number: H02M1/0029 , H02M1/007 , H02M7/4837
Abstract: A power converter is provided. The power converter includes first to fourth switches electrically connected in series, a flying capacitor and a controller. Positive and negative terminals of the flying capacitor are electrically connected to the second and third switches respectively. The controller operates the first and fourth switches to perform a first complementary switching with a first dead time, and operates the second and third switches to perform a second complementary switching with a second dead time. The controller determines to regulate the first or second dead time by detecting a capacitor voltage of the flying capacitor, such that the capacitor voltage of the flying capacitor is maintained within a balance voltage range.
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公开(公告)号：US11652420B2
公开(公告)日：2023-05-16
申请号：US17365608
申请日：2021-07-01
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Chao-Li Kao , Yi-Ping Hsieh , Jin-Zhong Huang , Chao-Lung Kuo , Hung-Yu Huang , Chih-Hsien Li
IPC: H02M3/335
CPC classification number: H02M3/33592 , H02M3/33553 , H02M3/33584
Abstract: An isolated converter with high boost ration includes a transformer, a first bridge arm, a second bridge arm, and a boost circuit. The transformer includes a secondary side having a secondary side first node and a secondary side second node. The first bridge arm includes a first diode and a second diode. The second bridge arm includes a third diode and a fourth diode. The boost circuit includes at least one fifth diode coupled between the first bridge arm and the secondary side second node, at least one sixth diode coupled between the second bridge arm and the secondary side first node, and at least two capacitors coupled to the secondary side first node and the secondary side second node.
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公开(公告)号：US10910943B1
公开(公告)日：2021-02-02
申请号：US16675474
申请日：2019-11-06
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Chao-Li Kao , Yi-Ping Hsieh , Jin-Zhong Huang , Chao-Lung Kuo
IPC: H02M1/42
Abstract: A bidirectional power factor correction (PFC) module is coupled to an AC power source, an energy storage unit, and a DC bus. The bidirectional PFC module includes a bridge arm assembly and a control unit. The bridge arm assembly includes a first bridge arm, a first inductor, a second inductor, and a second bridge arm. The control unit provides a plurality of control signals to control the first bridge arm and the second bridge arm to make the bidirectional PFC module operate in an AC power supply mode, a DC power supply mode, or a power feed mode.
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