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

The Korean Institute of Power Electronics (전력전자학회)
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Design and Implementation of 500 kHz High Frequency LLC Resonant Converter for High Power Density

높은 전력밀도를 갖는 500 kHz 고주파 LLC 컨버터의 설계와 구현

  • Park, Hwa-Pyeong (School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology (UNIST)) ;
  • Jung, Jee-Hoon (School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology (UNIST))
  • Received : 2014.10.16
  • Accepted : 2014.12.09
  • Published : 2015.02.20
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Abstract

In order to decrease the size of a switch mode power supply, high switching frequency can be an efficient way to reduce the size of passive components in the converter. In this paper, a 500-kHz high-frequency LLC resonant converter is proposed with an accurate design method of magnetizing inductance, as well as the relationship between the switching frequency and the size of the passive components. Simulation and experimental results are presented to verify the proposed methods and equations, including the temperature data of each passive and active device of the converter. Using those results, dominant power losses in the prototype converter under 500-kHz high-frequency operation are investigated, compared with the results from a 100-kHz converter. In addition, operating waveforms and power conversion efficiency will be shown to obtain design considerations for the high switching frequency LLC resonant converter.

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References

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