Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Power Stage Design for a Surface Wireless Power Transmission System using a Coupled Electric Field

전계결합을 이용한 면대면 무선 에너지 전송회로 개발

  • Choi, Sung-Jin (School of Electrical Engineering, University of Ulsan) ;
  • Kim, Se-Yeong (School of Electrical Engineering, University of Ulsan) ;
  • Choi, Byung-Woo (School of Electrical Engineering, University of Ulsan)
  • 최성진 (울산대학교 전기공학부) ;
  • 김세영 (울산대학교 전기공학부) ;
  • 최병우 (울산대학교 전기공학부)
  • Received : 2013.11.20
  • Accepted : 2013.12.31
  • Published : 2014.02.01
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Abstract

Conventional wireless power transfer methods based on coupled magnetic fields need a complex winding structure on the surface of the energy transfer and shows poor efficiency near metal objects due to the eddy current effect. In this study, to mitigate these problems, we investigate an electric field-coupled power transmission system, which is less prone to metal object problems and EMI. Because of the fundamental physical limit in the size of link capacitances, a half-bridge converter with an impedance matching transformer is proposed and the design procedure is derived to provide a soft-switching scheme. Hardware implementation shows that the proposed scheme with a pair of 10cm by 10cm copper plate can power a 1.4W USB FAN in a separation of 0.2mm by using insulating paper when driven by 227 kHz gate pulse.

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References

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