Planar spiral coils for inductive power transfer systems

This study discusses the inductive power transfer (IPT) system based on planar spiral coils. The primary series resonant and secondary parallel resonant (SP) topology and secondary parallel resonant (P) topology are utilized for the IPT system under varied air gap. The transfer function and frequency response of the SP topology and P topology for the IPT system are derived. The simulation results and test results under varied air gap are presented to validate the performances of the proposed scheme.