An ECPT system with complementary symmetric LCC resonant network

Aiming at the problem of short transmission distance and low transmission efficiency, a parameter configuration method for the complementary symmetric LCC networks is proposed on the basis of the ECPT system with double-sided LC resonant network. The equivalent capacitance Cs is introduced into LC network to form LCC resonant network. Through the mechanism analysis and the parameter design of the forward LCC network, the constant voltage output of the forward LCC network is achieved; with the symmetric design of the inverse LCC network, the system characteristics including ZPA (zero phase angle) and constant current operation are obtained. The analytic relationship between the resonant operating point and system parameters is obtained by the stroboscopic map modeling method. Combining with the identification of Cs and variable frequency control, the system can still work steadily in ZPA state after Cs changes. The simulation and experimental results are in good agreement.