Research Article

Wireless Power Transfer via Strongly Coupled Magnetic Resonances

Science  06 Jul 2007:
Vol. 317, Issue 5834, pp. 83-86
DOI: 10.1126/science.1143254

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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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