公开(公告)号：US20240283376A1

公开(公告)日：2024-08-22

申请号：US18653038

申请日：2024-05-02

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Muhammad YAQOOB ,  Mattias Andersson ,  Shuqin Wang ,  Grover Victor Torrico-Bascopé

IPC: H02M7/81 ,  H02M1/00

CPC classification number: H02M7/81 ,  H02M1/0058

Abstract: A bi-directional AC/DC power conversion apparatus includes a low frequency switching network, a high frequency switching network, and one or more inductors coupled between the high frequency switching network and an AC voltage. A controller provides bi-directional power transfer between a DC voltage and an AC voltage. The controller receives the DC voltage, the AC voltage, and a total current flowing through the inductors, and produces a duty cycle, a switching frequency, and switch control signals configured to operate the switching networks. The required ZVS current is achieved by varying the switching frequency based on the total current, the duty cycle, and the AC and DC voltages. ZVS operation is ensured by adjusting the switching frequency to create an available charge stored in an inductor at the switching instant equal to the charge stored in an output capacitance of a switching device.