Wireless power transfer via strongly coupled magnetic resonances.
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 approximately 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.
Kurs
André
A
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. akurs@mit.edu
Karalis
Aristeidis
A
Moffatt
Robert
R
Joannopoulos
J D
JD
Fisher
Peter
P
Soljacic
Marin
M