Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Analysis and Modeling of Wireless Power Transfer Systems using Magnetically Coupled Resonator Scheme with Relay Coils

릴레이 코일을 포함한 자기 공명 방식 무선 전력 전송 시스템의 분석 및 모델링

  • 박희수 (건국대학교 전자정보통신공학과) ;
  • 권민성 (건국대학교 전자공학부) ;
  • 김민지 (건국대학교 전자공학부) ;
  • 박현민 (건국대학교 전자공학부) ;
  • 구현철 (건국대학교 전자공학부/전자정보통신공학과)
  • Received : 2013.10.23
  • Accepted : 2013.11.21
  • Published : 2014.01.31
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Abstract

In this paper, characteristics of wireless power transfer (WPT) systems using magnetically coupled resonance scheme with relay coils are investigated and modeled. Especially, asymmetric frequency splitting characteristics in over-coupled region of WPT with relays are measured and accurately modeled. Transmitter, receiver, and relay coils are modeled with R, L, C equivalent circuits. Using these circuit models and mutual inductances between coils, a WPT system is described with a linear matrix equation. For under-coupled region, a matrix is simplified considering only mutual inductances between adjacent coils. An analytical transfer characteristic of WPT system vs. distance is extracted using an inverse matrix that is acquired by Gauss elimination method for the simplified matrix. For over-coupled region, a matrix considering mutual inductances between non-adjacent coils is used to predict a frequency splitting characteristics accurately. A 6.3MHz WPT system with relay coils is implemented and measured. An accuracy of the model is investigated by comparing the output of the model with the measured results.

Keywords

References

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