公开(公告)号：EP4432545A1

公开(公告)日：2024-09-18

申请号：EP23899091.5

申请日：2023-11-16

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： GAO, Shen ,  LU, Fenglong ,  LIU, Shuai ,  SHI, Lei

IPC: H02M7/483

Abstract: This application provides an inverter and a control method thereof. The inverter is used in a power supply system. The inverter includes an inverter circuit, a collection circuit, a balanced circuit, and an inductor. The collection circuit is configured to detect a direct current bus voltage, to obtain end voltage values of a first capacitor and a second capacitor. The balanced circuit is configured to: when an end voltage value of a target capacitor is less than or equal to a first voltage threshold, control on or off of a plurality of switching transistors, to adjust a current for charging the target capacitor through the inductor and reduce a difference between the end voltage values of the target capacitor and a non-target capacitor in the two groups of capacitors. According to this application, when the difference between the end voltage values of the two groups of capacitors in the inverter circuit is large, the balanced circuit may adjust an output current of the inductor to charge the target capacitor. This reduces the difference between the end voltage values of the two groups of capacitors in the inverter circuit, and improves stability and power supply efficiency of the inverter. A structure is simple, and the method is simple with high applicability.