Wireless Power Transfer via Strongly Coupled Magnetic Resonances

• DOI: 10.1126/science.1143254
• Publication Date: 2007-06-08T01:09:47Z
• Authors: André Kurs; Aristeidis Karalis; Robert Moffatt; J. D. Joannopoulos; Peter Fisher; Marin Soljačić
• Keywords: 0301 basic medicine; 03 medical and health sciences; 7. Clean energy

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.