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Sharing Voltage and Current of an Input-Series–Output-Parallel Boost-LLC Converter

Author

Listed:
  • Bo Zhang

    (Locomotive and Car Research Institute, China Academy of Railway Sciences Corporation Ltd., Beijing 100094, China)

  • Jin Huang

    (Locomotive and Car Research Institute, China Academy of Railway Sciences Corporation Ltd., Beijing 100094, China)

  • Yongfeng Song

    (Locomotive and Car Research Institute, China Academy of Railway Sciences Corporation Ltd., Beijing 100094, China)

  • Xinbo Liu

    (School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Jiahui Ren

    (School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Chengwei Kang

    (CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130022, China
    National Maglev Transportation Engineering Technology R&D Center, Tongji University, Shanghai 201804, China)

  • Yingtao Ma

    (Locomotive and Car Research Institute, China Academy of Railway Sciences Corporation Ltd., Beijing 100094, China)

  • Shijie Sun

    (CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130022, China)

  • Lijun Diao

    (School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China)

Abstract

Modular input-series–output-parallel (ISOP) converters are very suitable for high-voltage and high-power applications. In order to ensure the normal operation of ISOP converters, it is necessary to realize the input-voltage and output-current equalization of each submodule. However, there are few studies on the input-voltage and output-current equalization performance of the ISOP system. In this paper, the input-voltage and output-current equalization characteristics of a Boost + LLC modular ISOP converter are studied based on the small-signal model. In this paper, the small-signal model of an ISOP system is first established, and then the input-voltage and output-current equalization performance of the ISOP system under the condition of inconsistent submodule parameters are analyzed. Finally, simulations and experiments are reported to verify the results. The experimental results show that the ISOP system composed of a Boost + LLC cascaded module has excellent voltage and current self-equalization performance.

Suggested Citation

  • Bo Zhang & Jin Huang & Yongfeng Song & Xinbo Liu & Jiahui Ren & Chengwei Kang & Yingtao Ma & Shijie Sun & Lijun Diao, 2022. "Sharing Voltage and Current of an Input-Series–Output-Parallel Boost-LLC Converter," Energies, MDPI, vol. 15(19), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:7165-:d:928838
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