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Applying a Current Sharing Method Based on Partial Energy Processing to Multiphase LLC Resonant Converters

Author

Listed:
  • Yue-Lin Lee

    (Delta Electronics Inc., No. 186, Ruiguang Road, Neihu District, Taipei 114501, Taiwan)

  • Han-Hsiang Chen

    (Monolithic Power Systems: MPS, 29F, No. 97, Section 1, Xintai 5th Road, Xizhi District, New Taipei City 22175, Taiwan)

  • Kuo-Ing Hwu

    (Department of Electrical Engineering, National Taipei University of Technology, No. 1, Section 3, Zhongxiao East Road, Taipei 10608, Taiwan)

Abstract

In this paper, partial energy processing is applied to the current sharing technique for multiphase LLC resonant converters. The proposed circuit consists of an LLC resonant converter and a flyback converter, where the flyback converter is only used for partial energy processing. The input voltage of the LLC resonant converter is fine-tuned by the flyback converter to solve the problem of a voltage gain difference between the two phases of the LLC resonant converter caused by the error of the resonant tank components, which prevents the output current from being nonequalized. Since the compensation power is much smaller than the output power, and only one phase will be during circuit operation, the impact on the overall efficiency is minimal. Due to the low dependence between the LLC resonant converter and the flyback converter, they are operated at different switching frequencies. In addition, due to the low dependence between each phase, the circuit can be expanded using odd and even phases.

Suggested Citation

  • Yue-Lin Lee & Han-Hsiang Chen & Kuo-Ing Hwu, 2024. "Applying a Current Sharing Method Based on Partial Energy Processing to Multiphase LLC Resonant Converters," Energies, MDPI, vol. 17(15), pages 1-23, August.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:15:p:3859-:d:1450383
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