Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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A Study on Internal Loss Analysis of Totem Pole Bridgeless PFC and Efficiency Improvement using Parallel Switch

토템폴 브릿지리스 PFC의 내부 손실 분석과 병렬 스위치를 사용한 효율 개선에 관한 연구

  • Yoo, Jeong Sang (Department of Electronics Engineering, Cheongju University) ;
  • Gil, Yong Man (Department of Electronics Engineering, Cheongju University) ;
  • Yu, Seung Hyup (Department of Electronics Engineering, Cheongju University) ;
  • Ahn, Tae Young (Department of Electronics Engineering, Cheongju University)
  • 유정상 (청주대학교 전자공학과) ;
  • 길용만 (청주대학교 전자공학과) ;
  • 유승협 (청주대학교 전자공학과) ;
  • 안태영 (청주대학교 전자공학과)
  • Received : 2020.11.09
  • Accepted : 2020.12.08
  • Published : 2020.12.31
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Abstract

In this paper, a generalized efficiency equation was proposed to estimate the internal loss of the SMPS (switched-mode power supply) with 3 variables. The first variable was an internal loss not related to the load current such as auxiliary power, the second was a loss proportional to the current such as diode loss, and the third was a loss proportional to square of the current such as conduction loss. Especially, theoretical internal losses of the totem pole bridgeless PFC which is widely used for high efficiency SMPS were expressed as output function to compare generalized efficiency equation. In addition, in order to reduce the conduction loss of the switch, when a multiple switch were paralleled, the correlation with the efficiency was analyzed and shown as a graph. In order to confirm the degree of the parallel switch structure on the efficiency improvement, a 2kW class totem pole bridgeless PFC was constructed and the effectiveness of the analysis was confirmed by comparing the generalized efficiency equation and theoretical loss analysis results with experimental data.

Keywords

References

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