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Design Considerations for Adding Series Inductors to Reduce Electromagnetic Field Interference in an Over-Coupled WPT System

Author

Listed:
  • Yujun Shin

    (The Cho Chun Shik Graduate School for Green Transportation, KAIST, Daejeon 34051, Korea)

  • Jaehyoung Park

    (Hardware Engineering Group, Samsung Electronics, Suwon 16677, Korea)

  • Haerim Kim

    (The Cho Chun Shik Graduate School for Green Transportation, KAIST, Daejeon 34051, Korea)

  • Seongho Woo

    (The Cho Chun Shik Graduate School for Green Transportation, KAIST, Daejeon 34051, Korea)

  • Bumjin Park

    (The Cho Chun Shik Graduate School for Green Transportation, KAIST, Daejeon 34051, Korea)

  • Sungryul Huh

    (The Cho Chun Shik Graduate School for Green Transportation, KAIST, Daejeon 34051, Korea)

  • Changmin Lee

    (The Cho Chun Shik Graduate School for Green Transportation, KAIST, Daejeon 34051, Korea)

  • Seungyoung Ahn

    (The Cho Chun Shik Graduate School for Green Transportation, KAIST, Daejeon 34051, Korea)

Abstract

This paper analyzes how over-coupled coils affect odd harmonic current and electromagnetic interference (EMI) in a wireless power transfer (WPT) system, and proposes design considerations for series inductors to solve the EMI problem. When the air gap of the coils of the WPT system decreases below a certain level and the coils are over-coupled, the odd harmonic component of the input impedance of the system decreases and odd harmonic currents increase. The increase in the odd harmonic components current quickly aggravates the EMI issues. To solve the EMI problem of the over-coupled WPT system, additional series inductors were applied to the system, and considerations for designing the series inductors were analyzed. When designing additional series inductors, power transfer efficiency, maximum power transfer, input impedance and odd harmonic components current must be considered. Using simulations and experiments, it was confirmed that the WPT system designed with analyzed considerations maintained relatively high efficiency and reduced EMI issues.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:10:p:2791-:d:553452
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    References listed on IDEAS

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    1. Dongwook Kim & Dawon Jeong & Jongwook Kim & Haerim Kim & Junho Kim & Sung-Min Park & Seungyoung Ahn, 2020. "Design and Implementation of a Wireless Charging-Based Cardiac Monitoring System Focused on Temperature Reduction and Robust Power Transfer Efficiency," Energies, MDPI, vol. 13(4), pages 1-17, February.
    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.
    3. Silvano Cruciani & Tommaso Campi & Francesca Maradei & Mauro Feliziani, 2020. "Active Shielding Design and Optimization of a Wireless Power Transfer (WPT) System for Automotive," Energies, MDPI, vol. 13(21), pages 1-12, October.
    4. Nguyen Minh Tran & Muhammad Miftahul Amri & Je Hyeon Park & Sa Il Hwang & Dong In Kim & Kae Won Choi, 2019. "A Novel Coding Metasurface for Wireless Power Transfer Applications," Energies, MDPI, vol. 12(23), pages 1-14, November.
    5. Tommaso Campi & Silvano Cruciani & Valerio De Santis & Francesca Maradei & Mauro Feliziani, 2019. "Near Field Wireless Powering of Deep Medical Implants," Energies, MDPI, vol. 12(14), pages 1-18, July.
    6. 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.
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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. Yuan Li & Shumei Zhang & Ze Cheng, 2021. "Double-Coil Dynamic Shielding Technology for Wireless Power Transmission in Electric Vehicles," Energies, MDPI, vol. 14(17), pages 1-20, August.
    3. Geetha Palani & Usha Sengamalai & Pradeep Vishnuram & Benedetto Nastasi, 2023. "Challenges and Barriers of Wireless Charging Technologies for Electric Vehicles," Energies, MDPI, vol. 16(5), pages 1-47, February.

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