Closed-form oriented compensator analysis for series-parallel loosely coupled inductive power transfer systems

Based on the optimized conditions of the system output power, an innovative design approach to design the parameter values of compensated capacitors of a series-parallel loosely coupled inductive power transfer systems (SP-LCIPTS) is proposed in this paper. Under the optimized conditions, a closed form analysis for all of the bifurcation frequencies and respective corresponding output powers which can achieve input zero phase angle, decide the maximum output power and predict the corresponding operation frequency as the load changes. Therefore, the problems of output power dropping abruptly caused by the bifurcation frequencies can be prevented. Finally, guidelines with some simulation results are presented to verify the proposed theory.