公开(公告)号：US12206323B2

公开(公告)日：2025-01-21

申请号：US17994635

申请日：2022-11-28

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Hua Jiang ,  Zejie Lv ,  Baoguo Chen

IPC: H02M1/42 ,  H02M1/00 ,  H02M1/44

Abstract: A bridgeless PFC circuit includes: a control module that collects a current flowing through a current sampling element; and when the current flowing through the current sampling element is greater than a first threshold, the control module controls a switch element to be turned on. Based on the current flowing through the current sampling element, the switch element can be controlled to be turned on, thereby implementing zero-voltage turn-on of the switch element. Because the collected current does not change abruptly, a delay requirement on a sampling control circuit included in the control module is lowered, and a signal anti-interference capability of the control module is strong.

公开(公告)号：US20230327560A1

公开(公告)日：2023-10-12

申请号：US18325946

申请日：2023-05-30

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Wenguang Li ,  Zejie Lv ,  Yulian Ke

IPC: H02M3/158 ,  G01R19/04 ,  H02M1/00

CPC classification number: H02M3/1582 ,  G01R19/04 ,  H02M1/0009

Abstract: This application discloses a voltage conversion circuit, a voltage converter, and an electronic device. The voltage conversion circuit mainly includes a detection circuit having a first detection resistor and a second detection resistor, and a buck-boost circuit of an H-bridge structure. The first detection resistor is connected between one input end of the buck-boost circuit and one bridge arm of the H-bridge structure, the second detection resistor is connected between one output end of the buck-boost circuit and the other bridge arm of the H-bridge structure, and the detection circuit may output a current detection signal based on resistor voltages of the first detection resistor and the second detection resistor.

公开(公告)号：US12301105B2

公开(公告)日：2025-05-13

申请号：US18147177

申请日：2022-12-28

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Shu Zhong ,  Zejie Lv ,  Liqiong Yi ,  Denghai Pan ,  Yuping Qiu ,  Zezhou Yang

IPC: H02M3/335 ,  H02M3/00

Abstract: A resonant converter and a voltage conversion method. The resonant converter includes a high-frequency inversion circuit, an inductor-inductor-capacitor (LLC) resonant tank network, and a hybrid rectification circuit. The LLC resonant tank network is separately coupled to the high-frequency inversion circuit and the hybrid rectification circuit. The high-frequency inversion circuit is configured to convert a first direct current voltage into a first alternating current voltage. The LLC resonant tank network is configured to adjust the first alternating current voltage to obtain a second alternating current voltage.

公开(公告)号：US20240253494A1

公开(公告)日：2024-08-01

申请号：US18630421

申请日：2024-04-09

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Denghai Pan ,  Zejie Lv ,  Liqiong Yi

IPC: B60L53/30 ,  B60L53/51 ,  B60L53/53 ,  H02J3/00 ,  H02J3/14 ,  H02J3/32 ,  H02J3/36 ,  H02J3/38 ,  H02J7/02 ,  H02J7/35

CPC classification number: B60L53/30 ,  B60L53/51 ,  B60L53/53 ,  H02J3/007 ,  H02J3/144 ,  H02J3/32 ,  H02J3/36 ,  H02J3/38 ,  H02J7/02 ,  H02J7/35 ,  B60L2210/10 ,  B60L2210/30 ,  H02J2207/20 ,  H02J2300/24

Abstract: A charging module includes an AC-DC circuit, a first DC-DC circuit, and a first direct current transmission circuit. A first end of the AC-DC circuit is connected to an alternating current grid, a second end is connected to a first end of the first DC-DC circuit through a high-voltage direct current bus, and a second end of the first DC-DC circuit is connected to a to-be-charged apparatus. A second end of the first direct current transmission circuit is configured to connect to an external direct current apparatus.