Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (4): 33-38.doi: 10.3969/j.issn.1000-565X.2013.04.006

• Power & Electrical Engineering • Previous Articles     Next Articles

Analysis of Circuit Characteristics of Parallel Resonant Converter

Zhang Zhi-guo1 Xie Yun-xiang1 Yuan Zhao-mei2   

  1. 1.School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China;2.Fujian Longking Co.,Ltd.,Longyan 364000,Fujian,China
  • Received:2011-09-23 Revised:2012-09-11 Online:2013-04-25 Published:2013-03-01
  • Contact: 张治国(1977-)，男，博士，主要从事高频谐振变换器的建模与控制研究． E-mail:zhang1569@126.com
  • About author:张治国(1977-)，男，博士，主要从事高频谐振变换器的建模与控制研究．
  • Supported by:

    国家火炬计划项目( 2007GH060026)

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Abstract:

In order to fully reveal the circuit characteristics of the parallel resonant converter with capacitive outputfilter,the principle of the two operational modes of the converter is analyzed and the corresponding mathematicalmodels are constructed.Then,the circuit characteristics of the converter in the two operating modes are discussedand a linear variation of the input current is revealed when the equivalent output voltage is less than the input one.Finally,some expressions are deduced to design circuit component parameters,and a design method is proposed toobtain component parameters meeting the application requirements of the parallel resonant converter.Simulated resultsindicate that the above analysis and the proposed design method are both correct.

Key words: parallel resonance, circuit characteristic, operating mode, capacitive output filter, mathematical model-ing