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

The Korean Institute of Power Electronics (전력전자학회)
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Design of LLC Resonant Converter having Enhanced Load Range for Communication Power

넓은 부하 범위를 갖는 통신 전원용 LLC 공진 컨버터의 설계

  • So, Byong-Chul (Dept. of Control & Instrumentation Eng., Korea University of Transportation) ;
  • Seo, Ki-Bong (R&D Center Dongah Elecomm) ;
  • Lee, Dong-Hoo (R&D Center Dongah Elecomm) ;
  • Jung, Ho-Chul (R&D Center Dongah Elecomm) ;
  • Hwang, Soon-Sang (R&D Center Dongah Elecomm) ;
  • Kim, Hag-Wone (Dept. of Control & Instrumentation Eng., Korea University of Transportation) ;
  • Cho, Kwan-Yuhl (Dept. of Control & Instrumentation Eng., Korea University of Transportation) ;
  • Lim, Byung-Kuk (Dept. of Control & Instrumentation Eng., Korea University of Transportation)
  • Published : 2012.10.20
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Abstract

This paper deals with LLC resonant converter for communication power supply. Generally, the load range of communication power is very wide. However, voltage conversion ratio of LLC converter is highly dependent of load condition. So, it is not easy to design of robust power supply along with the wide load condition. Especially, it is not possible to meet the required low voltage conversion ratio for low output voltage with high input voltage under the light load condition. To solve this problem, in this paper, a new duty control interlinked with operational frequency has been proposed. To prove the usefulness of the proposed control method, the simulation and experiments were carried out. The simulation and experimental results show the usefulness of the proposed control method.

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References

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