Comparison of fractional-slot concentrated winding and PM-assisted synchronous reluctance motors for class IV electric vehicles

The design and comparative analysis of three 100 kW motors, a fractional-slot concentrated winding machine (FSCW) surface mounted permanent magnet and two permanent magnet-assisted synchronous reluctance machines (PMa SynRMs), were considered for a Class IV step van electric vehicle application. The electromagnetic, thermal, demagnetization, and acoustic performances of each machine have been presented as well as vehicle dynamic simulations for various urban drive cycles. The results show that all three motors are suitable for a Class IV electric vehicle. The advantages and the disadvantages of the machines with respect to their application for Class IV vehicles have been highlighted in this work.