Preliminary comparison study of drive motor for electric vehicle application

With the development of electric vehicles, increasing attention is paid to the selection of motor type for a specific vehicle application. Candidate drives include induction, reluctance, permanent magnet and transverse flux motor types. Calculations for these four machine types have been done to suit EV applications. In this paper, an analytical method is employed to extend these calculation results to general cases. The transverse flux machine (TFM) is taken as the reference machine and compared with the other types of machines by describing the main differences between them. Thus, the main characteristics of each machine type may be compared. In the paper, the TFM provides the best power and torque density at low speed with high efficiency, and seems suitable for EV application