Electromagnetic performance analysis of PMSM with eccentric consequent pole rotor

Abstract

The fractional slot concentrated winding permanent magnet synchronous machines (PMSM) are widely investigated in recent years. The electromagnetic performance of traditional 24-slot/20-pole surface-mounted PM machine (24/20-SPM) and 24-slot/20-pole SPM machine with consequent pole (CP) permanent magnet used for in-wheel motor drives for electric vehicle (EV) applications is quantitatively analyzed and compared by finite element analysis (FEA). The shape of the PMs for the 24/20-SPM machine with (CP) rotor is designed as eccentric shape (24/20-ECP-SPM) and compared with 24/20-CP-SPM machine with tile shape permanent magnet (24/20-CP-SPM). In addition, the electromagnetic performance which include back electromotive forces (Back-EMFs), cogging torque, average torque, torque ripple, the volume of PM, machine loss, efficiency and radial force distribution of the analyzed machines are compared and validated by FEA.