An LCCC-LCC Compensated Dual-Coupled WPT System With MI Enhancement and High Misalignment Tolerance

In this letter, an LCCC-LCC compensated dual-coupled wireless power transfer system is proposed to enhance the mutual inductance (MI) and antimisalignment capability. Only one capacitor is added to the LCC-compensated primary side. Not only the similar transfer characteristic to that of the LCC-LCC compensated system, like the load independent constant current output with zero phase angle (ZPA), but also the enhanced stable equivalent MI can be flexibly designed by introducing the MI adjustment factor λ. Thus, a stable output is efficiently offered. A 3.3-kW experimental prototype with Al plate is designed for validation. The result shows that the fluctuation of the load current is 5% within the 120 mm misalignment and the dc-dc efficiency of the system can be maintained above 90%.