Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (10): 178-184.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Sneak Circuit Characteristics of Switch-Mode Converters and the Corresponding Analysis Method

Zhang Bo  Qiu Dong-yuan   

  1. School of Electric Power, South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2007-03-01 Online:2007-10-25 Published:2007-10-25
  • Contact: 张波(1962-) ，男，教授，博士生导师，主要从事电力电子与电力传动研究. E-mail:epbzhang@scut. edu.cn
  • About author:张波(1962-) ，男，教授，博士生导师，主要从事电力电子与电力传动研究.
  • Supported by:

    国家自然科学基金资助项目(6074066,50177009,59777008 ,50507004 ) ;广东省自然科学基金资助项目(05103540 ,04020012)

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Abstract:

Based on the fact that the sneak circuit phenomena are found in resonant switched capacitor (RSC) converters, this paper proposes a graphic method to analyze the sneak circuit , obtains the generation laws of sneak circuit according to the energy equilibrium , and then summarizes a general analysis method for sneak circuits in switch-mode power converters. The proposed method , whose correctness is finally verified by experiments , can be used for the safety diagnosis in design process , and for discovering , eliminating or utilizing sneak circuit paths.

Key words: switch-mode converter, sneak circuit analysis, graphic theory switched capacitor, resonance