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The RMS Current Stress Reduction Technique in Link Capacitor of Two-stage AC/DC Converter  

Jang, Doo-Hee (국민대 전자공학과)
Jung, Young-Jin (국민대 전자공학과)
Roh, Chung-Wook (국민대 전자정보통신공학부)
Hong, Sung-Soo (국민대 전자정보통신공학부)
Han, Sang-Kyoo (국민대 전자정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.14, no.6, 2009 , pp. 449-456 More about this Journal
Abstract
The RMS(Root Mean Square) current stress reduction technique for the PFC link capacitor is proposed. Although the various parameter is exist for optimizing the link capacitor, the RMS current stress is the most weighty practical parameter. The proposed C-L filter can reduce effectively the RMS current stress by filtering the output current. And with the C-L-L-C filter proposed in this paper, the more RMS current stress can be reduce because it filters not only the output current, like C-L filter, but also the input current of DC/DC stage. The proposed filter is simple to design and have no effect on the control part of the PFC because of the very low crossover frequency. To confirm the validity of proposed filter, theoretical analysis, the design guide, verification of experimental results are presented.
Keywords
Two-stage; AC/DC converter; Filter; Current stress;
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  • Reference
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