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Design of Interleaved Winding for Multilayer Planar Inductor and Its Application in Reducing Current Ringing of LLC Resonant Converter

Author

Listed:
  • Qichen Liu

    (School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 611756, China)

  • Zhengquan Zhang

    (School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 611756, China)

Abstract

To enhance the power density of LLC resonant converters, multilayer planar inductors are required. However, multilayer planar inductors have high parasitic capacitance, which may cause inductor current ringing in LLC resonant converters, leading to EMI problems. In this paper, it is found that by using interleaved winding inductors, compared with traditional winding inductors, the parasitic capacitance of multilayer planar inductors is reduced, which can reduce current ringing, without sacrificing power density and increasing manufacturing complexity. The method used to analyze current ringing is to establish an impedance model, and the parasitic capacitance of the interleaved winding inductors is verified by FEM simulations. The analysis is validated in an LLC resonant converter prototype.

Suggested Citation

  • Qichen Liu & Zhengquan Zhang, 2024. "Design of Interleaved Winding for Multilayer Planar Inductor and Its Application in Reducing Current Ringing of LLC Resonant Converter," Energies, MDPI, vol. 17(7), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:7:p:1649-:d:1366702
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    References listed on IDEAS

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    1. Pouya Kolahian & Ferdinand Grimm & Mehdi Baghdadi, 2023. "A Comprehensive Review on Planar Magnetics and the Structures to Reduce the Parasitic Elements and Improve Efficiency," Energies, MDPI, vol. 16(7), pages 1-28, April.
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