倍流整流式不对称半桥DC/DC变换器软开关分析

华南理工大学学报（自然科学版） ›› 2005, Vol. 33 ›› Issue (1): 62-65,69.

倍流整流式不对称半桥DC/DC变换器软开关分析

王志强陈保艳

华南理工大学电力学院，广东广州 510640

收稿日期:2004-04-08 出版日期:2005-01-25 发布日期:2005-01-25
通信作者: 王志强(1951-)，男，副教授，主要从事高频开关电源和电力电子装置方面的研究 E-mail:gzwangzhiqiang@ hotmail.com
作者简介:王志强(1951-)，男，副教授，主要从事高频开关电源和电力电子装置方面的研究

ZVS Analysis of the Asymmetrical Half-Bridge DC/DC Converter with Current Doubler Rectification

Wang Zhi-qiang Chen Bao-yan

College of Electric Power,South China Univ.of Tech.,Guangzh0u 510640,Guangdong,China

Received:2004-04-08 Online:2005-01-25 Published:2005-01-25
Contact: 王志强(1951-)，男，副教授，主要从事高频开关电源和电力电子装置方面的研究 E-mail:gzwangzhiqiang@ hotmail.com
About author:王志强(1951-)，男，副教授，主要从事高频开关电源和电力电子装置方面的研究

摘要/Abstract

摘要： 分析了倍流整流式不对称半桥变换器的工作原理，并推导得出变换器实现零电压软开关(ZVS)的条件．为了克服漏感过大对变换器带来的不良影响，在分析励磁电流对ZVS作用的基础上，提出了通过减小励磁电感来减小漏感的方法．仿真结果表明，采用该方法的变换器只需很小的漏感就可在全负载范围内实现ZVS，且有效减小了占空比丢失．

关键词: 倍流整流, 不对称半桥, DC/DC变换器, 零电压开关

Abstract:

The principle of the asymmetrical half-bridge converter with current doubler rectification was analy d,and the ZVS(Zero-V0hage-Switched)conditions of the converter were deduced. In order to eliminate the influence resulted fmm the big leakage inductance,a method was proposed to reduce the leakage inductance by releasing the ma; letizing inductance.Th is method is based on the analysis of the effect of the magnetizing current on the ZVS of the e0nverter. Simulated resuIts confirm that the proposed converter can achieve ZVS at rated load even with very small leakage inductance and can effectively reduce the duty cycle loss.

Key words: eurrent doubler rectification, asymmetrical half-bridge, DC/DC converter, zero-vohage-sw tehed

王志强陈保艳. 倍流整流式不对称半桥DC/DC变换器软开关分析[J]. 华南理工大学学报（自然科学版）, 2005, 33(1): 62-65,69.

Wang Zhi-qiang Chen Bao-yan. ZVS Analysis of the Asymmetrical Half-Bridge DC/DC Converter with Current Doubler Rectification[J]. Journal of South China University of Technology (Natural Science Edition), 2005, 33(1): 62-65,69.