Repeater tuning against load variation for wireless power transfer

The incorporation of a repeater with a wireless power transfer (WPT) system for the performance improvement is investigated in this paper. Tuning of the self-resonance frequencies of transmitter, receiver and repeater coils is investigated as a promising approach to improve the performance against load variation. Theoretical analysis is presented using equivalent circuit method, and the 2-coil equivalent of WPT system with a repeaters is explored. Numerical results are presented along with experimental results to validate the proposed method.

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