The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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An Efficient Clamp to Reduce Switch Voltage Stress of Forward Converter

포워드 컨버터의 스위치 전압 스트레스 감소를 위한 효율적 클램프

  • Kim, Marn-Go (Dept. of Control & Instrumentation Engineering, Pukyong National University)
  • Received : 2015.09.15
  • Accepted : 2015.11.16
  • Published : 2016.02.20
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Abstract

In this study, an efficient clamp is proposed to reduce the switch voltage stress of a forward converter. The proposed clamp consists of a conventional LC snubber, a tertiary winding, and a diode. When the switch is turned OFF, the magnetizing inductor energy of the transformer is recovered directly into the flyback output, which is the tertiary winding and diode network, instead of circulating in the LC snubber. Therefore, switch voltage stress and circulating current caused by the magnetizing inductor energy are reduced. This condition improves the efficiency of the forward converter with limited switch voltage stress. A theoretical analysis and the design guidelines of the proposed converter are provided. Experimental results are also reported.

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References

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