An integrated characterization model for the magnetic design of an EV charger's circular wireless power transfer pads

A good magnetic design of wireless Electric Vehicle (EV) charging system requires accurate characterization of the equivalent circuit parameters. This is while taking into consideration the proximity effect of the magnetic core and the conductive shielding layers. In the literature, such analysis is done using 3D finite element analysis (3DFE), which makes the design process time consuming and computationally expensive. In this paper, an integrated analytical model for the characterization of a circular Wireless Power Transfer (WPT) EV pads is utilized. The results compare well with the results from an FE model as well as experimental test. This analytical model provides a valuable tool to optimize the design process and introduce an element of numerical verification.