公开(公告)号：US20220166313A1

公开(公告)日：2022-05-26

申请号：US17670592

申请日：2022-02-14

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jun WANG ,  Houjian XU ,  Tiansan LIN ,  Fangpo ZHANG

IPC: H02M3/07 ,  H02M1/00 ,  H02J3/38

Abstract: A direct current-direct current conversion circuit includes: an input inductor, a first capacitor, a second capacitor, a flying capacitor, a first switch, a second switch, a first inductor, a first diode, a first buffer circuit, a third switch, a fourth switch, a second inductor, a second diode, and a second buffer circuit. A power supply, the input inductor, the first diode, the second diode, the first capacitor, and the second capacitor are sequentially connected in series. A first terminal of the flying capacitor is connected between the first diode and the second diode. A second terminal of the flying capacitor is connected between the first switch and the third switch, and the second terminal of the flying capacitor is further connected between the second switch and the second inductor.

公开(公告)号：US20240305109A1

公开(公告)日：2024-09-12

申请号：US18583016

申请日：2024-02-21

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Kai GUO ,  Houjian XU ,  Xiaoxiang ZHOU

IPC: H02J3/38 ,  H02M7/483 ,  H02M7/5387

CPC classification number: H02J3/388 ,  H02M7/4835 ,  H02M7/53873

Abstract: A power converter includes a power conversion circuit, a relay, and a controller. The power conversion circuit can be configured to implement conversion from a direct current to an alternating current. The relay can be configured to implement on-grid and off-grid switching. The controller can be configured to control switch-on/off of switches in the power conversion circuit and the relay. When a positive direct current bus has a short circuit to ground, the controller switches off a relay of a corresponding phase when any phase of grid voltage is negative. When a negative direct current bus has a short circuit to ground, the controller switches off a relay of a corresponding phase when any phase of grid voltage is positive.