Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (1): 62-65,69.

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

Wang Zhi-qiang  Chen Bao-yan   

  1. 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

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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