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In vitro exposure system using magnetic resonant coupling wireless power transfer

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  • Author Bio:
    Kohei Mizuno received his B.S. and M.S. degrees in Electrical Engineering from Osaka University, Osaka Japan, in 2000 and 2002, respectively. He is now with Kansai Electric Power Co., Inc. In addition, he is a Ph.D. candidate in Electrical Engineering at Kyoto University, Kyoto, Japan. His research interests include power transmission line, wireless power transfer technology, and bioelectromagnetics of ELF and RF.
    Junji Miyakoshi received the Ph.D. degree in Anatomy from Osaka City University, Osaka, Japan, in 1982. During 1985–2002, he stayed in Graduate School of Medicine, Kyoto University, Kyoto, Japan. During 2002–2010, he was a Professor at the Faculty of Medicine, Hirosaki University, Hirosaki, Japan. Since 2010, he has been the Professor of the Research Institute for Sustainable Humanosphere, Kyoto University. His main interest is the molecular and cellular effects of electromagnetic fields and ionizing radiation. He was a Working Group Member of IARC for the risk assessment of ELF in 2002 and RF in 2011. He was also a Task Group Member of WHO for the ELF Environmental Health Criteria (EHC) in 2005. He has been serving ICNIRP Standing Committee Ⅱ since November 2006. He received the Charles Polk Memorial Award in 2004 at Washington DC, USA from the Bioelectromagnetic Society.
    Naoki Shinohara received the B.E. degree in Electronic Engineering, the M.E. and Ph.D. (Eng.) degrees in Electrical Engineering from Kyoto University, Japan, in 1991, 1993, and 1996, respectively. He was a Research Associate in the Radio Atmospheric Science Center, Kyoto University from 1998. He was a Research Associate of the Radio Science Center for Space and Atmosphere, Kyoto University by recognizing the Radio Atmospheric Science Center from 2000, and there he had been an Associate Professor since 2001. He was an Associate Professor in the Research Institute for Sustainable Humanosphere, Kyoto University by recognizing the Radio Science Center for Space and Atmosphere since 2004. Since 2010, he has been a Professor in Research Institute for Sustainable Humanosphere, Kyoto University. He has been engaged in research on Solar Power Station/Satellite and Microwave Power Transmission system
  • Corresponding author: K. Mizuno Email: mizuno.kohei.67z@st.kyoto-u.ac.jp 
  • 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.
  • Cite this article

    Mizuno K, Miyakoshi J, Shinohara N. 2014. In vitro exposure system using magnetic resonant coupling wireless power transfer. Wireless Power Transfer 1(2): 97-107 doi: 10.1017/wpt.2014.12
    Mizuno K, Miyakoshi J, Shinohara N. 2014. In vitro exposure system using magnetic resonant coupling wireless power transfer. Wireless Power Transfer 1(2): 97-107 doi: 10.1017/wpt.2014.12

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ARTICLE   Open Access    

In vitro exposure system using magnetic resonant coupling wireless power transfer

  • Author Bio:
    Kohei Mizuno received his B.S. and M.S. degrees in Electrical Engineering from Osaka University, Osaka Japan, in 2000 and 2002, respectively. He is now with Kansai Electric Power Co., Inc. In addition, he is a Ph.D. candidate in Electrical Engineering at Kyoto University, Kyoto, Japan. His research interests include power transmission line, wireless power transfer technology, and bioelectromagnetics of ELF and RF.
    Junji Miyakoshi received the Ph.D. degree in Anatomy from Osaka City University, Osaka, Japan, in 1982. During 1985–2002, he stayed in Graduate School of Medicine, Kyoto University, Kyoto, Japan. During 2002–2010, he was a Professor at the Faculty of Medicine, Hirosaki University, Hirosaki, Japan. Since 2010, he has been the Professor of the Research Institute for Sustainable Humanosphere, Kyoto University. His main interest is the molecular and cellular effects of electromagnetic fields and ionizing radiation. He was a Working Group Member of IARC for the risk assessment of ELF in 2002 and RF in 2011. He was also a Task Group Member of WHO for the ELF Environmental Health Criteria (EHC) in 2005. He has been serving ICNIRP Standing Committee Ⅱ since November 2006. He received the Charles Polk Memorial Award in 2004 at Washington DC, USA from the Bioelectromagnetic Society.
    Naoki Shinohara received the B.E. degree in Electronic Engineering, the M.E. and Ph.D. (Eng.) degrees in Electrical Engineering from Kyoto University, Japan, in 1991, 1993, and 1996, respectively. He was a Research Associate in the Radio Atmospheric Science Center, Kyoto University from 1998. He was a Research Associate of the Radio Science Center for Space and Atmosphere, Kyoto University by recognizing the Radio Atmospheric Science Center from 2000, and there he had been an Associate Professor since 2001. He was an Associate Professor in the Research Institute for Sustainable Humanosphere, Kyoto University by recognizing the Radio Science Center for Space and Atmosphere since 2004. Since 2010, he has been a Professor in Research Institute for Sustainable Humanosphere, Kyoto University. He has been engaged in research on Solar Power Station/Satellite and Microwave Power Transmission system
  • Corresponding author: K. Mizuno Email: mizuno.kohei.67z@st.kyoto-u.ac.jp 
Wireless Power Transfer  1 Article number: 10.1017/wpt.2014.12  (2014)  |  Cite this article

Abstract: 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.

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    Cite this article
    Mizuno K, Miyakoshi J, Shinohara N. 2014. In vitro exposure system using magnetic resonant coupling wireless power transfer. Wireless Power Transfer 1(2): 97-107 doi: 10.1017/wpt.2014.12
    Mizuno K, Miyakoshi J, Shinohara N. 2014. In vitro exposure system using magnetic resonant coupling wireless power transfer. Wireless Power Transfer 1(2): 97-107 doi: 10.1017/wpt.2014.12

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