Evaluation of Fractional Slot Concentrated Winding Permanent Magnet Synchronous Machine for Electric Vehicle Application

This paper mainly designed and compared the fractional slot concentrated winding (FSCW) permanent magnet synchronous motors (PMSMs) with different rotor topologies. To obtain higher peak torque with the constrain for cogging torque and torque ripple, three kinds of motors with different rotor topologies, including surface-mounted rotor, rectangular interior rotor and V-type interior rotor, are optimized using Maxwell. The optimized motors are further analyzed and compared with their electromagnetic performance at no load and its efficiency map. It turns out that higher peak torque can be achieved with surface-mounted rotor topology while V-type interior rotor has better performance in terms of efficiency map.