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Mutual and Self-Inductance Variation in Misaligned Coupler of Inductive Power Transfer System: Mechanism, Influence, and Solutions

Author

Listed:
  • Xiaochen Zhang

    (College of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China)

  • Xiaona Wang

    (College of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China)

  • Pan Sun

    (College of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China)

  • Jun Sun

    (College of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China)

  • Jin Cai

    (College of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China)

Abstract

This article focuses on the self- and mutual inductance variation of a coupler with ferrite in an Inductive Power Transfer (IPT) system. The mechanism of the variation was analyzed using the magnetic field splitting method, revealing that varying the reluctance leads to inductance variability. Additionally, the inductance variation trends were explored by Finite Element Analysis (FEA), based on which the input angle and voltage gain of an LCC-S type IPT system were calculated when coupler misalignment occurred. Then, an input voltage adjustment and frequency tracking compound control method was designed to neutralize the effect of inductance variability, which was validated by simulation. Finally, a prototype LCC-S type IPT system was fabricated. Experimental results reveal a 35.28% variation in self-inductance over the misalignment range, and the compound control managed to stabilize the output voltage and maintain the soft switching of the inverter with system efficiency remaining above 86% up to 94.27%. The proposed mechanism of inductance variation and compound control are instructive for solving the coupler misalignment problem in IPT systems.

Suggested Citation

  • Xiaochen Zhang & Xiaona Wang & Pan Sun & Jun Sun & Jin Cai, 2023. "Mutual and Self-Inductance Variation in Misaligned Coupler of Inductive Power Transfer System: Mechanism, Influence, and Solutions," Energies, MDPI, vol. 16(13), pages 1-16, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:5173-:d:1187296
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    References listed on IDEAS

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    1. Jacek Maciej Stankiewicz & Agnieszka Choroszucho, 2021. "Comparison of the Efficiency and Load Power in Periodic Wireless Power Transfer Systems with Circular and Square Planar Coils," Energies, MDPI, vol. 14(16), pages 1-24, August.
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    5. Jacek Maciej Stankiewicz & Agnieszka Choroszucho, 2021. "Efficiency of the Wireless Power Transfer System with Planar Coils in the Periodic and Aperiodic Systems," Energies, MDPI, vol. 15(1), pages 1-27, December.
    6. Xianyi Duan & Junqing Lan & Yinliang Diao & Jose Gomez-Tames & Hiroshi Hirayama & Masashi Hotta & George Fischer & Akimasa Hirata, 2021. "Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop," Energies, MDPI, vol. 14(21), pages 1-14, November.
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