Finite element analysis of hybrid excitation axial flux machine for electric cars

This paper presents a FEM analysis of a hybrid excitation brushless axial flux machine (HEBAFM) for traction electric vehicle purposes in order to compare with the results from an analytical method used to determine the flux densities in each part of the machine. The magnetic quantities of the proposed topology were investigated in order to obtain a satisfactory level of flux densities avoiding a possible saturation of the material. Keeping the magnetic induction under the saturation point, it will be feasible to increase the speed beyond the rated speed. The results from using the analytical method as well as via FEM simulation analysis presented a good approximation and are shown at the end of this paper.