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Design and Analysis of a Novel Magnetic Coupler of an In-Wheel Wireless Power Transfer System for Electric Vehicles

Author

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  • Young Jin Hwang

    (Center for Scientific Instrumentation, Korea Basic Science Institute, Daejeon 34133, Korea)

  • Jae Young Jang

    (Center for Scientific Instrumentation, Korea Basic Science Institute, Daejeon 34133, Korea)

Abstract

Electric vehicle (EVs), which use an electric motor, are expected to replace internal combustion engine vehicles. However, to date EVs are not highly attractive to consumers due to their unsatisfactory battery charging characteristics and high cost. In particular, the existing conductive charging method makes it more difficult to spread EVs due to the inconvenience of charging and the risk of electric shock. The wireless power transfer (WPT) system can eliminate all of the charging troubles of EVs. However, the WPT systems in existing EVs have large air gaps between the transmitter coil and the receiver coil, posing a hurdle that prevents success. The large air gap cause issues such as a loose coupling, low efficiency, and troublesome electromagnetic compatibility (EMC). An in-wheel WPT system can serve as a solution to address the issues arising due to the large air gap. In this paper, we propose a magnetic coupler structure of an in-wheel WPT system for EV applications. A design of two coils is introduced, in which the transmitter coil and receiver coil are designed based on a design method. Moreover, the pad structure according to the ferromagnetic core geometry is designed and discussed. The aim of this research is to find a suitable configuration of the magnetic coupler for an in-wheel WPT system. The values of the coupling coefficients according the magnetic coupler structure are determined. This paper is expected to provide a good reference for further research, including work on the manufacturing of a prototype.

Suggested Citation

  • Young Jin Hwang & Jae Young Jang, 2020. "Design and Analysis of a Novel Magnetic Coupler of an In-Wheel Wireless Power Transfer System for Electric Vehicles," Energies, MDPI, vol. 13(2), pages 1-22, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:2:p:332-:d:306981
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    References listed on IDEAS

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    1. Venugopal, Prasanth & Shekhar, Aditya & Visser, Erwin & Scheele, Natalia & Chandra Mouli, Gautham Ram & Bauer, Pavol & Silvester, Sacha, 2018. "Roadway to self-healing highways with integrated wireless electric vehicle charging and sustainable energy harvesting technologies," Applied Energy, Elsevier, vol. 212(C), pages 1226-1239.
    2. Linlin Tan & Jinpeng Guo & Xueliang Huang & Han Liu & Changxin Yan & Wei Wang, 2016. "Power Control Strategies of On-Road Charging for Electric Vehicles," Energies, MDPI, vol. 9(7), pages 1-14, July.
    3. Kamal Eldin Idris Elnail & Xueliang Huang & Chen Xiao & Linlin Tan & Xu Haozhe, 2018. "Core Structure and Electromagnetic Field Evaluation in WPT Systems for Charging Electric Vehicles," Energies, MDPI, vol. 11(7), pages 1-17, July.
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    Cited by:

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