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A Converter Based on Independently Inductive Energy Injection and Free Resonance for Wireless Energy Transfer

Author

Listed:
  • Lin Chen

    (Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China
    Department of Biological System Engineering, Washington State University, Pullman, WA 99164, USA)

  • Jianfeng Hong

    (Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China)

  • Mingjie Guan

    (Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China)

  • Zaifa Lin

    (Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China)

  • Wenxiang Chen

    (Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China)

Abstract

Strong coupling in an inductive power transfer (IPT) system will lead to difficulties in power control and loss of soft switching conditions. This paper presents an IPT system that can decouple the converter from the resonant network. In the proposed system, the energy transmission process is divided into energy injection stage and free resonance stage. In the energy injection stage, the inductor is separated from the resonance network, and the power source injects energy into the inductor independently. In the free resonance stage, the inductor is connected to the resonance network for resonating. As a benefit from the decoupling of the converter from the resonance network, the proposed IPT system is characterized by easy power control and soft switching operation. A prototype was built for experiments. The experimental results show that with a supply voltage of 300 V, coupling factor of 0.2, and load resistance of 10 Ω, the output power can be controlled nearly linearly by the time of the energy injection stage in a range of 40–60 μs, and the system works under soft switching conditions.

Suggested Citation

  • Lin Chen & Jianfeng Hong & Mingjie Guan & Zaifa Lin & Wenxiang Chen, 2019. "A Converter Based on Independently Inductive Energy Injection and Free Resonance for Wireless Energy Transfer," Energies, MDPI, vol. 12(18), pages 1-19, September.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:18:p:3467-:d:265352
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    References listed on IDEAS

    as
    1. Yan Lu & Dongsheng Brian Ma, 2016. "Wireless Power Transfer System Architectures for Portable or Implantable Applications," Energies, MDPI, vol. 9(12), pages 1-16, December.
    2. Lin Chen & Jianfeng Hong & Mingjie Guan & Wei Wu & Wenxiang Chen, 2019. "A Power Converter Decoupled from the Resonant Network for Wireless Inductive Coupling Power Transfer," Energies, MDPI, vol. 12(7), pages 1-18, March.
    3. Karam Hwang & Jaeyong Cho & Dongwook Kim & Jaehyoung Park & Jong Hwa Kwon & Sang Il Kwak & Hyun Ho Park & Seungyoung Ahn, 2017. "An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment," Energies, MDPI, vol. 10(3), pages 1-20, March.
    4. 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.
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    Cited by:

    1. Lin Chen & Jianfeng Hong & Zaifa Lin & Daqing Luo & Mingjie Guan & Wenxiang Chen, 2020. "A Converter with Automatic Stage Transition Control for Inductive Power Transfer," Energies, MDPI, vol. 13(20), pages 1-14, October.

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