Reduction in human interaction with magnetic resonant coupling wpt systems with grounded loop

Duan X, Lan J, Diao Y, Gomez-Tames J, Hirayama H, Hotta M, Fischer G, Hirata A (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Energies MDPI

Book Volume: 14

Article Number: 7253

Journal Issue: 21

DOI: 10.3390/en14217253

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 (psSAR), 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.

Authors with CRIS profile

Georg Fischer Professur für Technische Elektronik

Involved external institutions

Yamaguchi University JP Japan (JP) Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku JP Japan (JP) Chengdu University of Information Technology CN China (CN)

How to cite

APA:

Duan, X., Lan, J., Diao, Y., Gomez-Tames, J., Hirayama, H., Hotta, M.,... Hirata, A. (2021). Reduction in human interaction with magnetic resonant coupling wpt systems with grounded loop. Energies, 14(21). https://doi.org/10.3390/en14217253

MLA:

Duan, Xianyi, et al. "Reduction in human interaction with magnetic resonant coupling wpt systems with grounded loop." Energies 14.21 (2021).

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