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A Coupled-Inductor Interleaved LLC Resonant Converter for Wide Operation Range

Author

Listed:
  • Qianfan Zhou

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Yang Liu

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Zongjian Li

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Zhixing He

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

Abstract

In this paper, a coupled-inductor interleaved LLC resonant converter (CI-ILLC) was proposed, which can achieve extensive operation range applications by multiplexing inductors and switches. In this proposed CI-ILLC, the coupled-inductor not only serves as a filter inductor but also plays the role of transformer to improve the power density. By changing the modulation methods, the proposed converter can work at three modes for a wide operation range, namely high gain (HG) mode, medium gain (MG) mode, and low gain (LG) mode. Moreover, the interleaved structure greatly reduces the current ripple and current stress of switches. Besides, in HG and MG modes, all switches can realize zero-voltage switching, with high energy transmission efficiency. Finally, the simulation and experiment results of the prototype with 120–200 V input and 50–200 V output are presented to verify the viability of the proposed converter.

Suggested Citation

  • Qianfan Zhou & Yang Liu & Zongjian Li & Zhixing He, 2022. "A Coupled-Inductor Interleaved LLC Resonant Converter for Wide Operation Range," Energies, MDPI, vol. 15(1), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:1:p:315-:d:716772
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    Cited by:

    1. Kiran Kumar Geddam & Elangovan Devaraj, 2022. "Real Time Hardware-in-Loop Implementation of LLC Resonant Converter at Worst Operating Point Based on Time Domain Analysis," Energies, MDPI, vol. 15(10), pages 1-19, May.

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