公开(公告)号：US20240297576A1

公开(公告)日：2024-09-05

申请号：US18582873

申请日：2024-02-21

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jinxiang ZHAN ,  Kai GAO ,  Juncan WANG ,  Yongbing GAO

IPC: H02M1/32 ,  H02J3/38 ,  H02M3/158

CPC classification number: H02M1/322 ,  H02M3/158 ,  H02J3/38 ,  H02J2300/24

Abstract: A power conversion device includes a positive direct current bus, a negative direct current bus, a first capacitor, a second capacitor, a first inductor, a first discharge unit. The first capacitor is connected between the positive direct current bus and the negative direct current bus. The second capacitor is connected in series to the first inductor and then connected in parallel to the first capacitor, where a capacitance value of the second capacitor is greater than a capacitance value of the first capacitor. The first discharge unit is connected in parallel to the first inductor, and is configured to be in a conducted state when a voltage of the first inductor is greater than a first action voltage threshold. In the embodiments, a case in which a semiconductor device in the power conversion device has a risk of voltage overstress caused by a differential mode lightning strike can be avoided.