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Analysis and Implementation of Inverter Wide-Range Soft Switching in WPT System Based on Class E Inverter

Author

Listed:
  • Shaoteng Zhang

    (College of Electrical Engineering, Shanghai University of Electric Power, No. 2588, Changyang Road, Yangpu District, Shanghai 200090, China)

  • Jinbin Zhao

    (College of Electrical Engineering, Shanghai University of Electric Power, No. 2588, Changyang Road, Yangpu District, Shanghai 200090, China)

  • Yuebao Wu

    (College of Electrical Engineering, Shanghai University of Electric Power, No. 2588, Changyang Road, Yangpu District, Shanghai 200090, China)

  • Ling Mao

    (College of Electrical Engineering, Shanghai University of Electric Power, No. 2588, Changyang Road, Yangpu District, Shanghai 200090, China)

  • Jiongyuan Xu

    (College of Electrical Engineering, Shanghai University of Electric Power, No. 2588, Changyang Road, Yangpu District, Shanghai 200090, China)

  • Jiajun Chen

    (Pegasus Power Energy Co., Ltd., Hangzhou 310019, China)

Abstract

This article addresses the problem of hard switching caused by the change of equivalent load in a wireless power transfer (WPT) system based on a class E inverter. Based on the load-sensitive characteristics of the class E inverter, the coil structure is improved, and the self/mutual inductance compensation method of the transmitting coil is proposed to realize a wide range of soft switching. On the basis of fully considering the coupling relationship between the source and load coils, a coil structure with multiple coils in series on the primary side is proposed, and the cross-coupling relationship between the coils is analyzed in detail and simplified. The inverter parameters and coupling mechanism were adjusted by means of coil series reverse connection. Combined with the parameter influence law and the load equivalent principle of the class E inverter, the margin of soft switching at the inverter side was increased and the load offset correction was carried out. The soft-switching effect of the equivalent load from 0 to 3.3 times of ideal load was obtained, and the purpose of improving system reliability and efficiency was achieved. Finally, the feasibility and effectiveness of the proposed method were verified by simulation and experiment.

Suggested Citation

  • Shaoteng Zhang & Jinbin Zhao & Yuebao Wu & Ling Mao & Jiongyuan Xu & Jiajun Chen, 2020. "Analysis and Implementation of Inverter Wide-Range Soft Switching in WPT System Based on Class E Inverter," Energies, MDPI, vol. 13(19), pages 1-15, October.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:19:p:5187-:d:423974
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    References listed on IDEAS

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    1. Xuezhe Wei & Zhenshi Wang & Haifeng Dai, 2014. "A Critical Review of Wireless Power Transfer via Strongly Coupled Magnetic Resonances," Energies, MDPI, vol. 7(7), pages 1-26, July.
    2. Thuc Phi Duong & Jong-Wook Lee, 2015. "A Dynamically Adaptable Impedance-Matching System for Midrange Wireless Power Transfer with Misalignment," Energies, MDPI, vol. 8(8), pages 1-25, July.
    3. Chaoqiang Jiang & K. T. Chau & Chunhua Liu & Christopher H. T. Lee, 2017. "An Overview of Resonant Circuits for Wireless Power Transfer," Energies, MDPI, vol. 10(7), pages 1-20, June.
    4. Vijith Vijayakumaran Nair & Jun Rim Choi, 2016. "An Efficiency Enhancement Technique for a Wireless Power Transmission System Based on a Multiple Coil Switching Technique," Energies, MDPI, vol. 9(3), pages 1-15, March.
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    Cited by:

    1. Ching-Yao Liu & Guo-Bin Wang & Chih-Chiang Wu & Edward Yi Chang & Stone Cheng & Wei-Hua Chieng, 2021. "Derivation of the Resonance Mechanism for Wireless Power Transfer Using Class-E Amplifier," Energies, MDPI, vol. 14(3), pages 1-22, January.
    2. Li-Chuan Tang & Shyr-Long Jeng & Edward-Yi Chang & Wei-Hua Chieng, 2021. "Variable-Frequency Pulse Width Modulation Circuits for Resonant Wireless Power Transfer," Energies, MDPI, vol. 14(12), pages 1-25, June.

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