Research on Parameter Configuration of C-C and C-V of WPT System Based on LCL-LCC Compensation Network

During the operation of WPT (Wireless Power Transmission) system, load changes will cause the system's operating voltage and current to become unstable, and further cause circuit equipment to malfunction. A LCL-LCC type compensation network applied in wireless power transmission system was proposed in this paper. The circuit model was established to derive the working conditions of the primary side C-C (constant current) and secondary side C-V (constant voltage). And the current expression of the primary side and load voltage expression of the secondary side was obtained. The relationship between voltage gain of the system and capacitors of the secondary side was analyzed. In order to keep the current of the primary side and the load voltage of the secondary side stable when the circuit load changes, a circuit parameter design method with adaptive parameter configuration features was proposed which no control strategy is needed. Finally, the rationality of the proposed parameter design method was proved by the results of software simulation and experiment.