Wireless Power Transfer via Strongly Coupled Magnetic Resonances

Author:

Kurs André123,Karalis Aristeidis123,Moffatt Robert123,Joannopoulos J. D.123,Fisher Peter123,Soljačić Marin123

Affiliation:

1. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

2. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

3. Department of Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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