Analytical sizing methodology for inductive power transfer systems

In this paper an analytical sizing methodology for inductive power transfer (IPT) systems is proposed. The methodology is based on the inductance coupling principle. It allows to obtain the geometry (dimension of the coil, number of turns, according to the geometry type: circular, rectangular, square...) and the performance of an IPT system from just a few parameters: nominal power, nominal voltage in primary and secondary winding, air gap and operation frequency. This procedure has been implemented using Matlab, where different prototypes can be obtained in a very short time, reducing significantly the effort during the design process. The validation of the methodology has been carried out through finite element method (FEM) software and the construction and experimentation on a prototype. This paper includes a sensitivity analysis regarding coil sizing methodology, with the introduction of misalignment between windings.