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

The Korean Institute of Power Electronics (전력전자학회)
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A Study on 120Hz Output Voltage Ripple Reduction of LLC Converter using Resonant Controller

공진 제어기를 이용한 LLC 컨버터의 출력전압 120Hz 맥동저감에 관한 연구

  • So, Byong-Chul (Dept. of Control & Instrumentation Eng., Korea University of Transportation) ;
  • Lee, Sang-Ri (Dept. of Control & Instrumentation Eng., Korea University of Transportation) ;
  • Kim, Hag-Wone (Dept. of Control & Instrumentation Eng., Korea University of Transportation) ;
  • Cho, Kwan-Yuhl (Dept. of Control & Instrumentation Eng., Korea University of Transportation) ;
  • Hwang, Soon-Sang (R&D Center Dongah Elecomm) ;
  • Choi, Eun-Seok (Dept. of Electrical Engineering, KAIST)
  • Received : 2012.04.23
  • Accepted : 2012.06.11
  • Published : 2012.08.20
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Abstract

This paper proposes a new method to reduce 120Hz output voltage ripple of LLC converter using resonant voltage controller. This method can reduce the 120Hz output voltage ripple with very high gain at this frequency by the resonant controller with previous PI voltage controller. The reason why the voltage ripple can be reduced is explained by the Bode diagram comparing with the previous PI controller. The simulation with Matlab/Simulink is carried out for this resonant controller and the simulation results show that resonant controller can reduce the 120Hz output voltage ripple. Experiments with DSP controller also carried out and the experimental results also show that the usefulness of the proposed voltage controller.

Keywords

References

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Cited by

  1. Design of LLC Resonant Converter having Enhanced Load Range for Communication Power vol.17, pp.5, 2012, https://doi.org/10.6113/TKPE.2012.17.5.461