Physics-based FE model and analytical verification of bi-directional inductive wireless power transfer system

Accurate and efficient models can assist designers to predict and optimize the system performance during system development. This paper presents a physics-based 2-D finite-element model (FEM) for bidirectional inductive wireless power transfer system (BIWPTS) for electric vehicle (EV) applications. The proposed model is based on a co-simulation platform developed through the coupling between Finite Element (FE) and circuit modeling. A steady-state analytical model for the same system was developed and implemented in MatLab environment. A 0.5 kW BIWPTS was analyzed based on the two models and the results were compared. Less than 0.5% normalized mean square (NMSE) current error shows that the numerical models were able to predict the system performance accurately. These models can be easily extended to other magnetic designs, compensation and inverter topologies.