Iterative design method of weakly coupled magnetic elements for inductive power transfer

This paper proposes an iterative approach for the design of weakly coupled inductors for Inductive Power Transfer applications. The procedure is based on the Finite Element Method and can be used for several coil geometries and include skin and proximity effects. Considering electrical parameters, the presented algorithms represent self-inductances and mutual inductances in terms of equivalent geometric parameters. Also, Finite Element Method is used to analyze the coil system, with two or more coils, under axial, lateral and angular misalignment prior to the development of prototypes. The iterative method can be used to support the development of wireless power converters for biomedical sensors and implants, electric vehicles recharging systems and chargers for portable devices, with simple and minor modifications.