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

Energies

Junqing Lan¹  Xianyi Duan²  Yinliang Diao²  Hiroshi Hirayama²  Jose Gomez-Tames²  Akimasa Hirata²  Masashi Hotta³  George Fischer⁴ 

[1] College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610103, China;Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology University, Nagoya 4668555, Japan;Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi 7558611, Japan;Institute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany;

关键词: spiral coil;    wireless power transfer;    grounded loop;    human safety;    specific absorption rate (SAR);    computational dosimetry;   

DOI  :  10.3390/en14217253

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown