公开(公告)号：US20220368227A1

公开(公告)日：2022-11-17

申请号：US17872525

申请日：2022-07-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Tao SHI ,  Jixin ZHU

IPC: H02M3/158 ,  H02M7/483

Abstract: This application discloses a boost power conversion circuit, a method, an inverter, an apparatus, and a system. In the conversion circuit, a voltage control circuit is added on a three-level boost. The voltage control circuit can be connected in series in a third closed loop, and the third closed loop is a loop including an inductor, a first switching transistor, a flying capacitor, a second diode, and an input end. The voltage control circuit clamps a voltage of a common point of the first diode and the second diode when a voltage on an input end of the boost power conversion circuit is less than a startup voltage of the boost power conversion circuit. The voltage borne by the second diode is reduced, so that a diode with relatively small voltage stress can be selected.