scholarly journals In vitro exposure system using magnetic resonant coupling wireless power transfer

2014 ◽  
Vol 1 (2) ◽  
pp. 97-107 ◽  
Author(s):  
Kohei Mizuno ◽  
Junji Miyakoshi ◽  
Naoki Shinohara
Keyword(s):  
Magnetic Field ◽  
Cell Culture ◽  
Wireless Power Transfer ◽  
Reference Level ◽  
Power Transfer ◽  
Wireless Power ◽  
Exposure System ◽  
Resonant Coupling ◽  
In Vitro Exposure

Wireless power transfer (WPT) technology using the resonant coupling phenomenon has been widely studied. However, possible relationships between WPT exposure and human health have not been experimentally evaluated. In this study, we developed a new in vitro exposure system to evaluate the biological effects of magnetic resonant coupling WPT. The WPT was carried out using a self-resonant helical coil, which was designed to transfer the power with 85.4% efficiency at a 12.5 MHz resonant frequency. The magnetic field at the positions of the cell culture dishes is approximately twice the reference level for occupational exposure as stated in the International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines. The specific absorption rate (SAR) at the positions of the cell culture dishes match the respective reference levels stated in the ICNIRP guidelines. In this paper, the coil design for the magnetic resonant coupling in the in vitro exposure system and characteristics, such as power transfer efficiency, electric field and magnetic field distributions, and SAR of the exposure system, are described.

scholarly journals Evaluation of the Magnetic Field Leakage from Two Wireless Power Transfer Systems for EV/PHV Driven Simultaneously

2019 ◽  
Vol 10 (2) ◽  
pp. 41
Author(s):  
Toshiaki Watanabe ◽  
Yusuke Hakuta
Keyword(s):  
Magnetic Field ◽  
Human Exposure ◽  
Wireless Power Transfer ◽  
Hybrid Vehicles ◽  
Reference Level ◽  
Current Phase ◽  
Power Transfer ◽  
Wireless Power ◽  
Human Exposure Assessment ◽  
The Magnetic Field

Wireless power transfer for electric and plug-in hybrid vehicles has been developed to facilitate battery charging. In a wireless power transfer system, because the magnetic field leaks to the surroundings of the vehicle, it is important to evaluate the quantitative human exposure. The International Commission on Non-Ionizing Radiation Protection provides guidelines for human exposure assessment. In this study, we evaluate the magnetic field leakage under two parking configurations and current phase differences for two vehicles being simultaneously charged (3.7 kW at 85 kHz per vehicle). The results of the analysis show that the magnetic field leakage is lower than the reference level of the guidelines for all cases and that the leakage could be reduced by controlling the phase difference between the two wireless power transfer systems equally distributed from the single high-frequency power source for each parking configuration.

scholarly journals A Reconfigurable Coil grid for Receiver Localization in Wireless Power Transfer and Magnetic Field Steering

2020 ◽  
pp. 1-1
Author(s):  
Jaafar Al Sinayyid ◽  
Hakim Takhedmit ◽  
Patrick Poulichet ◽  
Marjorie Grzeskowiak ◽  
Antoine Diet ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power
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