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：US20240186908A1

公开(公告)日：2024-06-06

申请号：US18519429

申请日：2023-11-27

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Denghai PAN ,  Yuping QIU ,  Jiansheng CHEN

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33592 ,  H02M1/0058 ,  H02M1/0064

Abstract: A power supply apparatus, a three-phase transformer circuit, and a charging pile. The power supply apparatus includes a turns ratio switching circuit, a connection relationship switching circuit, a three-phase transformer, and two three-phase rectifier bridge circuits. A three-phase primary winding of the three-phase transformer is configured to receive a three-phase alternating current. A three-phase secondary winding of the three-phase transformer is configured to output a three-phase alternating current to each of the two three-phase rectifier bridge circuits. A running mode of the three-phase transformer includes a first turns ratio mode and a second turns ratio mode. The turns ratio switching circuit is configured to switch a quantity of turns of the three-phase primary winding, to switch the running mode of the three-phase transformer.