PWM与谐振型开关变流器的设计及实验

对(桥式)零电流开关准谐根变流器电路加以改进，通过引入辅助开关，使准谐振变流器工作在恒频PWM方式下；同时，分析及研究桥式并联谐振开关变流器存在的几个不足之处；针对这些问题，对原有电路拓朴结构提出一系列改进措施以及引入多谐振技术；新一类变流器包括几种不同的电路结构，其开关场效应管实现了在零电流条件下导通及关断，变流器的控制方式实现恒频PWM控制方式，该文通过电路分析、计算机仿真以及桥式变流器的电路实验，证实了改进后变流器所具有的优点。

Zero Current Switching Multi-resonant Converters based on ConstantFrequency PWM and Mutual Inductance Technique

This paper introduces a novel constant frequency switching PWM converter,as well as some improvements on the conventional bridge parallel resonant converters. By introducing mutual inductance and auxiliary into the original circuit topology ,a class of novel zero current switching multi-resonant converters regulated by PWM mode at a fixed switching frequency are presented,which overcomes some drawback of the original circuits.One illustrative example is analyzed and the experimental results are given, which confirms the advantages of this approach.