公开(公告)号：US20230155488A1

公开(公告)日：2023-05-18

申请号：US18157270

申请日：2023-01-20

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Haitao CHEN ,  Xingzhong ZHANG

IPC: H02M3/00 ,  H02M3/158 ,  H02M1/36 ,  H02M1/00 ,  H02M3/07

CPC classification number: H02M3/01 ,  H02M3/1582 ,  H02M1/36 ,  H02M1/0058 ,  H02M3/07

Abstract: A conversion circuit includes a capacitor module, a balancing module, and a startup module. The capacitor module includes at least a first capacitor and a second capacitor. The balancing module includes at least a first resonant circuit. The startup module includes a direct current-direct current converter and a target capacitor. The first resonant circuit includes at least two groups of switches and a first resonant cavity. The first capacitor is connected in series to the second capacitor, and connected in parallel to the target capacitor. The first resonant circuit is separately connected to both ends of the first capacitor and the second capacitor by using the startup module. The balancing module balances voltages at both ends of the first capacitor and the second capacitor by controlling the switches in the first resonant circuit. The startup module is configured to start the balancing module and the capacitor module.

公开(公告)号：US20220321005A1

公开(公告)日：2022-10-06

申请号：US17848155

申请日：2022-06-23

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Haitao CHEN ,  Xingzhong ZHANG

IPC: H02M3/155 ,  H02M3/00 ,  H02J7/00 ,  H02M3/07

Abstract: A converter circuit is provided in this application, which includes a capacitor module and a balance module. The capacitor module includes at least a first capacitor and a second capacitor. The balance module includes at least a first resonant circuit. The first resonant circuit includes at least two switch groups connected in parallel and a first resonant cavity bridged between the two switch groups. The first capacitor and the second capacitor are connected in series. The first resonant circuit is separately bridged between two ends of the first capacitor and between two ends of the second capacitor. The balance module controls each switch in the first resonant circuit, so that each switch works with the first resonant cavity to affect a current, to balance a voltage between the two ends of the first capacitor and a voltage between the two ends of the second capacitor.

公开(公告)号：US20230208287A1

公开(公告)日：2023-06-29

申请号：US18174084

申请日：2023-02-24

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Haitao CHEN ,  Xingzhong ZHANG ,  Zhengdong JIANG

IPC: H02M3/07 ,  H02M3/158 ,  H02M3/00

CPC classification number: H02M3/07 ,  H02M3/158 ,  H02M3/015

Abstract: A DC/DC converter and a voltage gain switching method and system. A first resonance unit of the DC/DC converter includes a first terminal and a second terminal connected to a second capacitor unit, and a third terminal and a fourth terminal connected to a first capacitor unit. A second resonance unit of the DC/DC converter includes a first terminal connected to a second terminal of the second capacitor unit, and a second terminal of the second resonance unit connected to a first input/output terminal of the DC/DC converter, a third terminal connected to the ground terminal of the DC/DC converter, and a fourth terminal connected to a first voltage gain changeover switch. The DC/DC converter can improve voltage gain switching efficiency.