公开(公告)号：US20230136512A1

公开(公告)日：2023-05-04

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: H02M3/00 ,  H02M3/335

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：US20250015699A1

公开(公告)日：2025-01-09

申请号：US18760567

申请日：2024-07-01

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jin YANG ,  Zejie LV ,  Kun YU

IPC: H02M1/00 ,  H02J1/10 ,  H02J3/46

Abstract: A power conversion apparatus includes an AC-DC conversion circuit, a power controller, and a circulating current controller. The power controller is configured to control the AC-DC conversion circuit to convert a received alternating current into a first direct current and output the first direct current. The circulating current controller is configured to send a synchronization signal to another power conversion apparatus through a controller area network (CAN) bus. The synchronization signal is used to synchronize a carrier of the another power conversion apparatus with a carrier of the power conversion apparatus.

公开(公告)号：US20240146096A1

公开(公告)日：2024-05-02

申请号：US18492022

申请日：2023-10-23

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jin YANG ,  Zejie LV ,  Yang LIU ,  Yaping LIU ,  Jiansheng CHEN

IPC: H02J7/35 ,  B60L53/51 ,  H02J7/00

CPC classification number: H02J7/35 ,  B60L53/51 ,  H02J7/0029 ,  B60L2210/10 ,  H02J2207/20

Abstract: A charging apparatus, a charging pile, and a charging system. The charging apparatus includes a positive bus, a negative bus, a DC/DC conversion circuit, and a soft-start circuit. The soft-start circuit is connected to an input end of the DC/DC conversion circuit through the positive bus and the negative bus, and the input end of the DC/DC conversion circuit is connected to a photovoltaic apparatus or an energy storage apparatus through the positive bus and the negative bus. Therefore, when a first voltage between the positive bus and the negative bus is greater than or equal to a first threshold, the DC/DC conversion circuit may perform power conversion on a second voltage received from the photovoltaic apparatus or the energy storage apparatus, and output the second voltage obtained after power conversion.

公开(公告)号：US20230089905A1

公开(公告)日：2023-03-23

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.