The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis of No-load Characteristics in LLC Resonant Converter

LLC 공진형 컨버터의 무부하 특성 분석

  • Kwon, Min-Jun (Dept. of Electrical Electronic & Control Engineering, Hankyong National University) ;
  • Lee, Woo-Cheol (Dept. of Electrical Electronic & Control Engineering, Institute for information technology convergence, Hankyong National University)
  • Received : 2017.10.26
  • Accepted : 2018.02.02
  • Published : 2018.03.01
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Abstract

LLC resonant converter is popular with industrial fields because it can be achieved high efficiency by zero voltage switching (ZVS). As interest grew, analysis of characteristics in LLC resonant converter have been actively studied. Generally, characteristic of LLC resonant converter is analyzed based on first harmonic approximation(FHA). The FHA analysis represents the characteristics of LLC resonant converter by obtaining the series resonant operation. FHA analysis of LLC resonant converter in load condition is correct. but it is not correct in no load condition. This paper proposed analysis of characteristics considering the parasitic components to overcome the limitation of FHA and analyze no-load characteristics. The validity of the proposed method has been investigated by simulation and experimental results.

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References

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