Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 27, Issue 4, Pages 1905-1916Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2011.2169460
Keywords
Electromagnetic coupling; magnetic induction; wireless power transfer
Categories
Funding
- Hong Kong Research Grant Council [HKU114410]
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In this paper, the effects of the magnetic coupling of nonadjacent resonators on the optimal frequency of wireless power transfer are addressed. A power analysis has been carried out to identify the adjacent and nonadjacent power flow components. It is found that such cross-coupling effects of nonadjacent resonators would cause the maximum efficiency operation to slightly shift away from the resonance frequency of the resonators. Theoretical reasons for such phenomena are provided and experimentally confirmed with practical measurements in a wireless power transfer system comprising several magnetically coupled resonators arranged in a straight domino form.
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