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A Self-Tuning LCC/SP System for Electric Vehicle Wireless Charging against Large Self- and Mutual Inductance Variations

Author

Listed:
  • Yiyan Zhao

    (Department of Automotive Engineering, Tongji University, Shanghai 201800, China)

  • Xuezhe Wei

    (Department of Automotive Engineering, Tongji University, Shanghai 201800, China)

  • Zhichao Luo

    (Engineering Department, Division B, University of Cambridge, Cambridge CB3 0FA, UK)

  • Meng Xiong

    (Department of Automotive Engineering, Tongji University, Shanghai 201800, China)

  • Haifeng Dai

    (Department of Automotive Engineering, Tongji University, Shanghai 201800, China)

Abstract

An LCC/SP self-tuning wireless charging system is proposed herein for use in a wireless charging test bench. With different dislocations in addition to changes in the coil self-inductance and mutual inductance caused by different secondary magnetic shielding materials, the system can ensure that the high power factor of the primary side remains unchanged without changing the circuit topology. Based on this normalized detuning LCC/SP circuit model, a switch-controlled capacitor (SCC) self-tuning method based on PI control is proposed. The control scheme employs only two MOSFETs and capacitors, without WIFI communication or parameter identification. A 2 kW experimental device was set up in the laboratory, and experimental verification was carried out with large-scale dislocations and different secondary magnetic shielding materials. The experimental results confirm that the system can maintain a high power factor (>0.9) under a system mutual inductance variation of 47.7% and secondary coil self-inductance variation of 12%, and that it can be applied in electric vehicle wireless chargers or high-power wireless charger test benches.

Suggested Citation

  • Yiyan Zhao & Xuezhe Wei & Zhichao Luo & Meng Xiong & Haifeng Dai, 2022. "A Self-Tuning LCC/SP System for Electric Vehicle Wireless Charging against Large Self- and Mutual Inductance Variations," Energies, MDPI, vol. 15(11), pages 1-28, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:3980-:d:826365
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    References listed on IDEAS

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    1. Yafei Chen & Hailong Zhang & Sung-Jun Park & Dong-Hee Kim, 2019. "A Comparative Study of S-S and LCCL-S Compensation Topologies in Inductive Power Transfer Systems for Electric Vehicles," Energies, MDPI, vol. 12(10), pages 1-19, May.
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