Capacitive output filter effect on series-series inductive power transfer systems operating in asymmetric loading mode

In this work, the effect of a capacitive output filter in a series-series compensated inductive power transfer system, operating in asymmetric loading mode, is investigated. Asymmetric loading is performed by a half-cycle short-circuit / half-cycle loading operation, in the secondary side of the system. The aim is to reduce the value of the load resistance as reflected to the power supply, in order to increase the power intake from a given voltage source. Theoretical analysis shows that with the capacitive output filter, the output power can be up to four times the one achieved with the conventional full-wave rectification incorporating the same output filter. Simulations are carried out for a variety of resistive loads and frequencies of operation. Results show a significant increase in the output power, especially for high resistance loads, in comparison with the conventional full wave rectification.