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1.发明授权公开(公告)号：US11923769B2
公开(公告)日：2024-03-05
申请号：US17728038
申请日：2022-04-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Ken Chin , Shanglin Mo , Yuanjun Liu
IPC: H02M1/42
CPC classification number: H02M1/4233
Abstract: The control system includes a PFC circuit and a sampling control circuit, and the PFC circuit includes an inductor, a first power supply drive circuit, and a first bridge arm and a second bridge arm that are connected in parallel, and a first bridge arm midpoint is a serial connection point between a first upper bridge arm and a first lower bridge arm of the first bridge arm. The sampling control circuit is configured to control, based on voltages of two ends of an alternating current power supply, the first lower bridge arm to be turned on, so that the first power supply drive circuit starts charging. The sampling control circuit is further configured to: when charging duration of the first power supply drive circuit reaches first target duration, control the first lower bridge arm to be turned off, so that the first power supply drive circuit completes charging.
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公开(公告)号：US12301100B2
公开(公告)日：2025-05-13
申请号：US18168515
申请日：2023-02-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Ken Chin , Yuanjun Liu , Zhixiang Hu
Abstract: A power factor correction (PFC) circuit includes an alternating current input circuit, a totem-pole PFC circuit, an input sampling circuit, an output sampling circuit, and a PFC control protection circuit. A first output terminal of the alternating current input circuit is respectively connected to a first input terminal of the totem-pole PFC circuit and a first input terminal of the input sampling circuit.
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公开(公告)号：US11979086B2
公开(公告)日：2024-05-07
申请号：US17750645
申请日：2022-05-23
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Ken Chin , Yuanjun Liu , Zhixiang Hu , Shuaibing Wang
CPC classification number: H02M3/01 , G01R19/12 , H02M1/0009 , H02M1/0058
Abstract: This application provides a resonant conversion system, including a controller and a resonant conversion circuit. The resonant conversion circuit includes a high frequency chopper circuit, a resonant cavity, a transformer, and a rectification filter network, and the high frequency chopper circuit includes switches S1 and S2. The controller is configured to: detect a bridge arm midpoint voltage VSW, and determine based on the VSW a current threshold signal used to indicate a current threshold; detect a resonant current on a primary side of the transformer, and compare the resonant current with the current threshold signal to control on/off of the switch S1 or S2 based on the second electrical signal, so that the system operates in an inductive mode to ensure zero voltage switching of the switch, while operating in a state close to a capacitive mode to maximize the use of a gain region.
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Patent Agency Ranking
公开(公告)号：US20230198383A1
公开(公告)日：2023-06-22
申请号：US18173416
申请日：2023-02-23
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Ken Chin , Yuanjun Liu , Zhixiang Hu , Wei Zhang
CPC classification number: H02M1/4233 , H02M1/44
Abstract: A high power factor rectifier circuit includes a totem pole power factor correction (PFC) circuit, a sampling resistor, a power suppl a PFC controller, and a filter. The totem pole PFC circuit includes two bridge arm units connected in parallel between a first parallel connection point and a second parallel connection point. One end of the sampling resistor is connected to the first parallel connection point and a first reference ground, and the other end of the sampling resistor is separately connected to a sampling voltage input terminal of the PFC controller and a second reference ground. A grounding terminal of the PFC controller is connected to the first reference ground. A power output terminal of the power supply is connected to a power input terminal of the PFC controller using the filter.
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5.发明公开公开(公告)号：US20240014731A1
公开(公告)日：2024-01-11
申请号：US18346679
申请日：2023-07-03
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Ken Chin , Shanglin Mo , Shuaibing Wang , Liangyun Kang
CPC classification number: H02M1/4233 , H02M1/0038
Abstract: A noise suppression method and apparatus for a totem pole power factor correction (PFC) circuit and an electronic device are provided. In response to a determination that an alternating current of the totem pole PFC circuit is switched at a zero crossing, a control signal is sent to a switch that enables a PFC inductor in the totem pole PFC circuit to charge or discharge. After the switch is turned off for a first period of time, the switch is turned on again for a second period of time.
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公开(公告)号：US20230198382A1
公开(公告)日：2023-06-22
申请号：US18167624
申请日：2023-02-10
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Ken Chin , Zhixiang Hu , Yuanjun Liu
CPC classification number: H02M1/4225 , H02M7/217
Abstract: An example of a totem-pole bridgeless power factor correction circuit includes a first drive circuit, a rectifier bridge, an inductor, and a current detection circuit. The rectifier bridge includes a first metal oxide semiconductor (MOS) transistor and a first resistor that are located in a first bridge arm. The first drive circuit is configured to drive, based on a first PWM signal when a voltage of a second output port of an alternating current power supply is a positive voltage, a first port and a second port of the first MOS transistor to turn on the first MOS transistor to enable the alternating current power supply to charge the inductor by using the first MOS transistor. The first resistor is configured to convert a current flowing through the first MOS transistor into a corresponding first voltage signal
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公开(公告)号：US11658649B2
公开(公告)日：2023-05-23
申请号：US17717265
申请日：2022-04-11
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Ken Chin , Yuanjun Liu , Guiping Zhang , Shanglin Mo
IPC: H03K5/24
CPC classification number: H03K5/24
Abstract: A pin state configuration circuit, a method for configuring pin states and an electronic device for configuring pin states are provided. The pin state configuration circuit includes a configured resistor load, a voltage sampling unit, and a comparator. The voltage sampling unit supplies a reference voltage to the configured resistor load by using a first or second configuration pin, and respectively samples voltages of the first and second configuration pins. The comparator calculates a first voltage ratio based on the voltage of the first configuration pin and the voltage of the second configuration pin, calculates a second voltage ratio based on the voltage of the first configuration pin and the voltage of the second configuration pin, and determines a corresponding pin configuration state based on the first and second voltage ratios. In this way, N×N pin configuration states may be obtained by configuring two configuration pins.
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公开(公告)号：US20220376686A1
公开(公告)日：2022-11-24
申请号：US17717265
申请日：2022-04-11
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Ken Chin , Yuanjun Liu , Guiping Zhang , Shanglin Mo
IPC: H03K5/24
Abstract: A pin state configuration circuit, a method for configuring pin states and an electronic device for configuring pin states are provided. The pin state configuration circuit includes a configured resistor load, a voltage sampling unit, and a comparator. The voltage sampling unit supplies a reference voltage to the configured resistor load by using a first or second configuration pin, and respectively samples voltages of the first and second configuration pins. The comparator calculates a first voltage ratio based on the voltage of the first configuration pin and the voltage of the second configuration pin, calculates a second voltage ratio based on the voltage of the first configuration pin and the voltage of the second configuration pin, and determines a corresponding pin configuration state based on the first and second voltage ratios. In this way, N×N pin configuration states may be obtained by configuring two configuration pins.
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