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Analysis and Introduction of Effective Permeability with Additional Air-Gaps on Wireless Power Transfer Coils for Electric Vehicle Based on SAE J2954 Recommended Practice

Author

Listed:
  • Dongwook Kim

    (Graduate School for Green Transportation, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea)

  • Hongseok Kim

    (Electromagnetic Compatibility Laboratory, Missouri University of Science and Technology, Rolla, MO 65401, USA)

  • Anfeng Huang

    (Electromagnetic Compatibility Laboratory, Missouri University of Science and Technology, Rolla, MO 65401, USA)

  • Qiusen He

    (Electromagnetic Compatibility Research Center, Southwest University of Science and Technology, Mianyang 621010, China)

  • Hanyu Zhang

    (Electromagnetic Compatibility Research Center, Southwest University of Science and Technology, Mianyang 621010, China)

  • Seungyoung Ahn

    (Graduate School for Green Transportation, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea)

  • Yuyu Zhu

    (Electromagnetic Compatibility Research Center, Southwest University of Science and Technology, Mianyang 621010, China)

  • Jun Fan

    (Electromagnetic Compatibility Laboratory, Missouri University of Science and Technology, Rolla, MO 65401, USA)

Abstract

The wireless power transfer (WPT) method for electric vehicles (EVs) is becoming more popular, and to ensure the interoperability of WPT systems, the Society of Automotive Engineers (SAE) established the J2954 recommended practice (RP). It includes powering frequency, electrical parameters, specifications, testing procedures, and other contents for EV WPT. Specifically, it describes the ranges of self-inductances of the transmitting coil, the receiving coil, and coupling coefficient ( k ), as well as the impedance matching values of the WPT system. Following the electrical parameters listed in SAE J2954 RP is crucial to ensure the EV wireless charging system is interoperable. This paper introduces a method for adjusting the effective permeability of the ferrite blocks in the standard model, to tune the self-inductance of the coils as well as the coupling coefficient. To guarantee the given values of the self-inductance of the coil and coupling coefficient matched those in the standard, we slightly modified the air-gap between the ferrite tiles in a specific region. Based on this method, it was possible to successfully tune the self-inductance of the transmitting coil and receiving coil as well as the coupling coefficient. The proposed method was verified by simulation and experimental measurements.

Suggested Citation

  • Dongwook Kim & Hongseok Kim & Anfeng Huang & Qiusen He & Hanyu Zhang & Seungyoung Ahn & Yuyu Zhu & Jun Fan, 2019. "Analysis and Introduction of Effective Permeability with Additional Air-Gaps on Wireless Power Transfer Coils for Electric Vehicle Based on SAE J2954 Recommended Practice," Energies, MDPI, vol. 12(24), pages 1-11, December.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:24:p:4797-:d:298623
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    References listed on IDEAS

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    2. 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.
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    Cited by:

    1. Seongho Woo & Yujun Shin & Changmin Lee & Jaewon Rhee & Jangyong Ahn & Jungick Moon & Seokhyeon Son & Sanguk Lee & Hongseok Kim & Seungyoung Ahn, 2022. "Minimizing Leakage Magnetic Field of Wireless Power Transfer Systems Using Phase Difference Control," Energies, MDPI, vol. 15(21), pages 1-18, November.
    2. Yujun Shin & Jaehyoung Park & Haerim Kim & Seongho Woo & Bumjin Park & Sungryul Huh & Changmin Lee & Seungyoung Ahn, 2021. "Design Considerations for Adding Series Inductors to Reduce Electromagnetic Field Interference in an Over-Coupled WPT System," Energies, MDPI, vol. 14(10), pages 1-28, May.

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