An Isolated SWISS Rectifier with Low Voltage Stress

doi:10.3969/j.issn.1008- 0198.2023.05.015

Abstract

Abstract: In order to solve the problems of high voltage stress in high-frequency switching tubes of SWISS-forward rectifier and the straight-through risk of SWISS phase-shift full-bridge rectifier, a dual-transistor forward SWISS rectifier topology is proposed in this paper. The fusion of the dual-transistor forward converter and SWISS rectifier not only provides direct galvanic isolation for the SWISS rectifier but also reduces the voltage stress of the high-frequency switching transistor. At the same time, each bridge arm of the output circuit is composed of a diode and a switch in series, which ensures the reliability of the rectifier. The working principle of the dual-transistor forward SWISS rectifier and the voltage stress of the switching tube are analyzed in detail, and a two-stage filter is designed to suppress the current oscillation in order to solve the problem of input current distortion at the sector boundary. Finally, the feasibility of the rectifier topology and the effectiveness of the control method are verified on the simulation platform.

Key words: isolated, voltage stress, SWISS rectifier

CLC Number:

TM461

ZHOU Wanchuan, ZHANG Xu, LUO Zhaoxu, CHENG Zhun. An Isolated SWISS Rectifier with Low Voltage Stress[J]. Hunan Electric Power, 2023, 43(5): 99-108.

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