Performance evaluation of a 60kW IPM motor for medium commercial EV traction application

This paper presented the design and performance analysis of a 60kW interior permanent-magnet (IPM) synchronous motor used as traction drive in a medium commercial electric vehicle (EV), according to the traction requirements of the electric vehicle under the rated operating conditions and overload conditions. The key dimensions were calculated on the basis of the permanent-magnet (PM) motor theory, and the 2D finite element method (FEM) simulation model of the IPM motor was built by using 2D Maxwell software. The influence geometric structures of the IPM motor including the PM dimensions and skewed PMs on electromagnetic torque were investigated, and the temperature distribution of the motor under rated operating condition and the condition of maximum speed were calculated. Finally, the simulation results of the IPM motor running in various operating modes were compared with the experimental results, which demonstrated that the designed IPM motor can match all requirements of the medium commercial electric vehicle driving applications.