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Research ArticlesWireless Power Transfer via Strongly Coupled Magnetic Resonances i 1
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
1 Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. 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.
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. * To whom correspondence should be addressed. E-mail: akurs{at}mit.edu
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Science. ISSN 0036-8075 (print), 1095-9203 (online)