Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Miniaturization of Inductive Resonator for Implementation of Wireless Power Transfer Technology Using Resonant Inductive Coupling

자기 공진 결합 방식을 이용한 무선 전력 전송기술 구현을 위한 자기 공진기 소형화 설계

  • Cho, Young Seek (Center for Advanced Electric Applications, Wonkwang University) ;
  • Park, Ji Hye (Department of Information and Communication Engineering, Wonkwang University) ;
  • Nam, Yun Seo (Department of Information and Communication Engineering, Wonkwang University) ;
  • Choi, Seyeong (Department of Information and Communication Engineering, Wonkwang University)
  • Received : 2014.07.01
  • Accepted : 2014.07.28
  • Published : 2014.08.31
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Abstract

A novel inductive resonator for the implementation of wireless power transfer using resonant inductive coupling is presented. The proposed inductive resonator is much smaller than the helix shape resonator suggested by MIT research team but operates the same resonant frequency with comparable wireless power transfer efficiency. The proposed inductive resonator is a spiral shape ($1,696cm^3$), which is 97 % smaller than the helix shape ($59,376cm^3$). The wireless power transfer efficiency is less than 9 % when compared to the helix shape resonator. With the reduce size and comparable efficiency, this novel inductive resonator can be used in practical application of wireless power transfer.

자기 공진 결합 (resonant inductive coupling) 현상을 이용한 무선 전력 전송 기술을 구현하기 위하여 새로운 구조의 자기 공진기를 제시한다. MIT 연구팀이 제안한 헬릭스 (helix) 모양의 자기 공진기의 크기를 줄이고, 공진 주파수 10 MHz를 유지하며, 무선 전력 전송 효율이 크게 열화 되지 않도록 설계한다. 새로운 구조의 자기 공진기는 스파이럴 (spiral) 모양으로써 헬릭스 모양 대비 소형화를 달성하였다. 스파이럴 모양 ($1,696cm^3$)의 자기 공진기는 헬릭스 모양 ($59,376cm^3$) 대비 97% 소형화를 이룩하였고, 무선 전력 전송 효율은 기존 기술 (2 m 거리에서 40 % 전송 효율) 대비 9% 이하로 차이를 줄임으로써 무선 전력 전송 기술의 실용화에 기여할 수 있게 되었다.

Keywords

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