关键词: 软开关, 开关电源, ZVT, 拓扑结构

Abstract:

A novel switch power conversion circuit based on synchronous rectification and ZVT soft switching technology has been successfully designed.In order to achieve synchronous rectification,the low-resistance MOSFETs are used instead of the diode.It is realized that switch tube turn-on or turn-off under conditions of zero voltage or zero current by using soft switching technology.The simulated characteristics of topological structure are simulated by using PSIM software.The results show that the overall efficiency of the converter is improved effectively and the wastage of the physical device is reduced as well.

Key words: soft switching;switching power supply;ZVT;topological structure