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

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

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.

Creators Duan Xianyi

Creators Lan Junqing

Creators Diao Yinliang

Creators Gomez-Tames Jose

Creators Hirayama Hiroshi

Creators Hotta Masashi

Creators Fischer George

Creators Hirata Akimasa

Creative Commons Attribution 4.0 International(https://creativecommons.org/licenses/by/4.0/deed.en)

[isIdenticalTo] https://doi.org/10.3390/en14217253

Award Energy Conversion Systems: From Materials to Devices 2019/R1