Comparison of double-stator flux-switching permanent magnet machine and double-stator permanent magnet synchronous machine for electric vehicle applications

In this paper, a new type of double-stator flux-switching permanent magnet (DS-FSPM) machine is proposed to compare with the traditional permanent magnet synchronous machine (DS-PMSM). By using finite element method, both the steady and transient electromagnetic performances of the machine are investigated in details. The comparison shows that the DS-FSPM possesses higher air gap flux density and output torque under the same current density or the same copper loss, but it also shows that the DS-FSPM owns larger cogging torque, which will result in undesirable conditions for the electric vehicle applications. Besides, the DS-FSPM and the DS-PMSM both offers relatively higher efficiency under the same conditions. Both the theory and simulation results verify the reasonability of the DS-FSPM and the DS-PMSM, which is very essential for electric vehicles.