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Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop

Author

Listed:
  • Xianyi Duan

    (Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology University, Nagoya 4668555, Japan)

  • Junqing Lan

    (College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610103, China)

  • Yinliang Diao

    (Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology University, Nagoya 4668555, Japan
    College of Electronic Engineering, South China Agricultural University, Guangzhou 510642, China)

  • Jose Gomez-Tames

    (Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology University, Nagoya 4668555, Japan)

  • Hiroshi Hirayama

    (Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology University, Nagoya 4668555, Japan)

  • Masashi Hotta

    (Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi 7558611, Japan)

  • George Fischer

    (Institute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany)

  • Akimasa Hirata

    (Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology University, Nagoya 4668555, Japan)

Abstract

Wireless power transfer (WPT) systems have attracted considerable attention in relation to providing a reliable and convenient power supply. Among the challenges in this area are maintaining the performance of the WPT system with the presence of a human body and minimizing the induced physical quantities in the human body. This study proposes a magnetic resonant coupling WPT (MRC-WPT) system that utilizes a resonator with a grounded loop to mitigate its interaction with a human body and achieve a high-efficiency power transfer at a short range. Our proposed system is based on a grounded loop to reduce the leakage of the electric field, resulting in less interaction with the human body. As a result, a transmission efficiency higher than 70% is achieved at a transmission distance of approximately 25 cm. Under the maximum-efficiency conditions of the WPT system, the use of a resonator with a grounded loop reduces the induced electric field, the peak spatial-average specific absorption rate ( ps SAR), and the whole-body averaged SAR by 43.6%, 69.7%, and 65.6%, respectively. The maximum permissible input power values for the proposed WPT systems are 40 and 33.5 kW, as prescribed in the International Commission of Non-Ionizing Radiation Protection (ICNIRP) guidelines to comply with the limits for local and whole-body average SAR.

Suggested Citation

  • Xianyi Duan & Junqing Lan & Yinliang Diao & Jose Gomez-Tames & Hiroshi Hirayama & Masashi Hotta & George Fischer & Akimasa Hirata, 2021. "Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop," Energies, MDPI, vol. 14(21), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:7253-:d:671149
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    References listed on IDEAS

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    1. Linlin Tan & Kamal Eldin Idris Elnail & Minghao Ju & Xueliang Huang, 2019. "Comparative Analysis and Design of the Shielding Techniques in WPT Systems for Charging EVs," Energies, MDPI, vol. 12(11), pages 1-20, June.
    2. Takaya Arai & Hiroshi Hirayama, 2020. "Folded Spiral Resonator with Double-Layered Structure for Near-Field Wireless Power Transfer," Energies, MDPI, vol. 13(7), pages 1-13, April.
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    Cited by:

    1. Xiaochen Zhang & Xiaona Wang & Pan Sun & Jun Sun & Jin Cai, 2023. "Mutual and Self-Inductance Variation in Misaligned Coupler of Inductive Power Transfer System: Mechanism, Influence, and Solutions," Energies, MDPI, vol. 16(13), pages 1-16, July.

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