Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Analysis of Magnetically Coupled Wireless Power Transmission for Maximum Efficiency

  • Kim, Chung-Ju (Department of Electronics and Radio Engineering, Kyung Hee University) ;
  • Lee, Bom-Son (Department of Electronics and Radio Engineering, Kyung Hee University)
  • Received : 2011.09.01
  • Published : 2011.09.30
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Abstract

We have proposed and analyzed an equivalent circuit for a magnetically coupled wireless power transmission (WPT) system between two loop resonators by considering its coupling coefficient and radiation-related parameters. A complete formulation is provided for all the necessary circuit parameters. The mechanism of radiation loss is sufficiently explained. The circuit and electromagnetic (EM) simulation results have been shown to be in good agreement. Based on the proposed circuit formulation, a specific load impedance for maximum WPT efficiency was found to exist. The proposed modeling of the WPT in terms of circuit characterizations provides sufficient insight into the problems associated with WPT.

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