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Wireless Power Transfer via Strongly Coupled Magnetic Resonances

André Kurs, Aristeidis Karalis, Robert Moffatt, J. D. Joannopoulos, Peter Fisher and Marin Soljačić
Science
New Series, Vol. 317, No. 5834 (Jul. 6, 2007), pp. 83-86
Stable URL: http://www.jstor.org/stable/20036648
Page Count: 4
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Wireless Power Transfer via Strongly Coupled Magnetic Resonances
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Abstract

Using self-resonant coils in a strongly coupled regime, we experimentally demonstrated efficient nonradiative power transfer over distances up to 8 times the radius of the coils. We were able to transfer 60 watts with ∼40% efficiency over distances in excess of 2 meters. We present a quantitative model describing the power transfer, which matches the experimental results to within 5%. We discuss the practical applicability of this system and suggest directions for further study.

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