A Method of Prediction and Analysis of Electromagnetic Interference (EMI) in Wireless Power Transfer System Operating at 13.56 MHz

13.56 MHz 무선 에너지 전송 시스템의 효율적인 전자파 장해(EMI) 예측 및 분석 방법

  • Shim, Hyun-Jin (Department of Electronic and Computer Engineering, Seoul National University) ;
  • Park, Jong-Min (Department of Electronic and Computer Engineering, Seoul National University) ;
  • Nam, Sangwook (Department of Electronic and Computer Engineering, Seoul National University)
  • 심현진 (서울대학교 전기.컴퓨터공학부) ;
  • 박종민 (서울대학교 전기.컴퓨터공학부) ;
  • 남상욱 (서울대학교 전기.컴퓨터공학부)
  • Received : 2013.05.24
  • Accepted : 2013.08.28
  • Published : 2013.09.30


The effective way of estimation and analysis of EMI(Electromagnetic Interference) in Wireless Power Transfer System operating at 13.56 MHz is proposed. In this paper methodology of driving magnetic field strength and electric loop current of two antennas which are in free space and on PEC plane using image theory and duality is proposed. Perfect electric conductor(PEC) is planar, infinite in extent, and perfectly conducting plane. And we will refer it as PEC plane. A equivalent circuit model is used to analyze. Using this theoretical analysis, we can derive maximum magnetic field strength of the far-field region numerically using measured data of near-field maximum magnetic field strength. The experimental results using commercial numerical simulation tool are in agreement with the theoretical results. Also, using the derivation of maximum magnetic field strength in the far-field region, we can easily estimate the maximum allowable power dissipation that meets EMI regulations.


EMI;Wireless Power Transfer System;Magnetic Field Strength


Supported by : 방송통신위원회


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