Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Interleaved DC-DC Converters with Partial Ripple Current Cancellation

  • Lin, Bor-Ren (Dept. of Electrical Eng., National Yunlin University of Science and Technology) ;
  • Chiang, Huann-Keng (Dept. of Electrical Eng., National Yunlin University of Science and Technology) ;
  • Cheng, Chih-Yuan (Dept. of Electrical Eng., National Yunlin University of Science and Technology)
  • Received : 2011.01.11
  • Published : 2012.03.20
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Abstract

An interleaved PWM converter is proposed to implement the features of zero voltage switching (ZVS), load current sharing and ripple current reduction. The proposed converter includes two ZVS converters with a common clamp capacitor. With the shared capacitor, the charge balance of the two interleaved parts is automatically regulated under input voltage and load variations. The active-clamping circuit is used to realize the ZVS turn-on so that the switching losses on the power switches are reduced. The ZVS turn-on of all of the switching devices is achieved during the transition interval. The interleaved pulse-width modulation (PWM) operation will reduce the ripple current and the size of the input and output capacitors. The current double rectifier (CDR) is adopted in the secondary side to reduce output ripple current so that the sizes of the output chokes and capacitor are reduced. The circuit configuration, operation principles and design considerations are presented. Finally experimental results based on a 408W (24V/17A) prototype are provided to verify the effectiveness of the proposed converter.

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References

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