Asymmetric loading of a series resonant R-L-C circuit for power transfer increase in inductive chargers

Asymmetric loading of a series R-L-C resonant circuit can under certain conditions provide useful characteristics concerning power transfer from a voltage generator to a resistive load. In this paper the behavior of such an arrangement, intended for inductive power transfer systems, is examined by a semi-analytical approach, PSpice simulation and a simple experimental setup. A power transfer gain of more than sixty percent can be obtained compared to the symmetrical loading, which can prove significant in the effort to provide inductive fast charging for electric vehicles.