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Analysis of Dynamic Characteristics of Foreign Metal Objects under Electromagnetic Force in High-Power Wireless Power Transfer

Author

Listed:
  • Xian Zhang

    (Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, TianGong University, Tianjin 300387, China)

  • Yanan Ren

    (Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, TianGong University, Tianjin 300387, China)

  • Lin Sha

    (Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, TianGong University, Tianjin 300387, China)

  • Qingxin Yang

    (Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, TianGong University, Tianjin 300387, China)

  • Xuejing Ni

    (Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, TianGong University, Tianjin 300387, China)

  • Fengxian Wang

    (Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, TianGong University, Tianjin 300387, China)

Abstract

Because of the noncontact structure of wireless power transfer (WPT) systems, foreign metal objects can easily enter into the coupling region—and often move under the action of electromagnetic force (EMF), instead of staying relatively static, which brings a difficult problem for foreign object detection technology. In this paper, we investigate the motion state of foreign metal objects with different properties under the action of electromagnetic force in the coupling space of WPT system. The equivalent model of the circuit parameters with the intervention of foreign metal objects and the differential equations for the motion of foreign metal objects are derived. Combined with finite-element simulation calculations, the motion characteristic of ferromagnetic and non-ferromagnetic metals under EMF was analyzed. The results show that, due to the size and properties of the metal, non-ferromagnetic foreign metal objects have four states: vibration, suspension, static and flying out. The ferromagnetic foreign metal objects will adsorb on the coil surface and rapidly heat up. By establishing an experimental prototype, the analysis uses high-speed acquisition equipment to obtain the movement of foreign metal objects which verified the correctness of the simulation. This research is also beneficial to the operational safety and reliability of the WPT.

Suggested Citation

  • Xian Zhang & Yanan Ren & Lin Sha & Qingxin Yang & Xuejing Ni & Fengxian Wang, 2020. "Analysis of Dynamic Characteristics of Foreign Metal Objects under Electromagnetic Force in High-Power Wireless Power Transfer," Energies, MDPI, vol. 13(15), pages 1-15, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3881-:d:391787
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    References listed on IDEAS

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    1. Bo Cheng & Jianghua Lu & Yiming Zhang & Guang Pan & Rakan Chabaan & Chunting Chris Mi, 2020. "A Metal Object Detection System with Multilayer Detection Coil Layouts for Electric Vehicle Wireless Charging," Energies, MDPI, vol. 13(11), pages 1-16, June.
    2. 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.
    3. Linlin Tan & Jiacheng Li & Chen Chen & Changxin Yan & Jinpeng Guo & Xueliang Huang, 2016. "Analysis and Performance Improvement of WPT Systems in the Environment of Single Non-Ferromagnetic Metal Plates," Energies, MDPI, vol. 9(8), pages 1-16, July.
    4. Yang Liu & Bin Li & Mo Huang & Zhijian Chen & Xiuyin Zhang, 2018. "An Overview of Regulation Topologies in Resonant Wireless Power Transfer Systems for Consumer Electronics or Bio-Implants," Energies, MDPI, vol. 11(7), pages 1-22, July.
    5. Xian Zhang & Xuejing Ni & Bin Wei & Songcen Wang & Qingxin Yang, 2018. "Characteristic Analysis of Electromagnetic Force in a High-Power Wireless Power Transfer System," Energies, MDPI, vol. 11(11), pages 1-13, November.
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