Design and Optimization of DD Coupling Mechanism of Inductively Coupled Power Transmission System in Metal Environment

In this paper, the influence of metal environment on magnetic induction coupled wireless power transmission system (WPT) is studied. A DD coil coupling mechanism is proposed, and the design method of the metal surround coupling mechanism is given to improve the mutual inductance of primary and secondary sides. On this basis, the ferrite cores mechanism of DD coil was optimized to further improve the output power and efficiency of the system. Finally, an experimental platform was built to verify the effectiveness of the analysis.