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

The Korean Institute of Power Electronics (전력전자학회)
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A Load Sharing Method of Parallel-connected Two Interleaved CrM Boost PFC Converters

병렬 연결된 두 개의 Interleaved CrM Boost PFC 컨버터의 부하 공유 방법

  • Kim, Moon-Young (Visual Display Business, Samsung Electronics Co., Ltd.) ;
  • Kang, Shinho (Visual Display Business, Samsung Electronics Co., Ltd.) ;
  • Kang, Jeong-Il (Visual Display Business, Samsung Electronics Co., Ltd.) ;
  • Han, Jonghee (Visual Display Business, Samsung Electronics Co., Ltd.)
  • Received : 2020.10.26
  • Accepted : 2020.12.05
  • Published : 2021.02.20
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Abstract

Operation of the interleaved Boost PFC converter in Critical Conduction Mode (CrM) shows the advantages of high efficiency and good EMI characteristics owing to the valley switching of FET. However, when it is designed for a highly pulsating load, operation at a relatively high frequency is inevitable at non-pulsating typical load condition, resulting in efficiency degradation. Moreover, the physical size of the inductor becomes problematic because of the nature of the CrM operation, where the inductor peak current is about two times the inductor average current, thereby requiring high DC-bias characteristics, which is worse when the output power is high. In this study, a new parallel driving method of two sets of interleaved boost PFC converters for highly pulsating high-power application is proposed. The proposed method does not require any additional load-sharing controller, resulting in high efficiency and smaller inductor size.

Keywords

References

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