Analysis Technique of a Six-Phase Surface-Mounded Permanent Magenet Synchronous Motor for Electric Vehicle Applications

Permanent magnet synchronous motors (PMSMs) have been widely applied in the fields of electric cars/strucks and industries due to their high torque and efficiency, reliable performance, simple structure and various shapes and sizes.Recently, multi-phase PMSMs with inner and outer configurations have been applied to the above applications.However, the investigation, evaluation and comparison performences of multi-phase PMSM with inner and outer rotor types in previous studies have not been fully presented in both the analytical model and finite element technique.The previous researches mainly have focussed on doing experiments without presenting the detail of design of these machines.In this context, electromagnetic parameters (such as electromagnetic torque, cogging torque, torque ripple, back electromagnetic force, linkage flux) of a six-phase surface mounted PMSM (SPMSM) with inner and outer rotor configurations is proposed via an association of analytic model and finite element method (FEM).The development of the proposed methods is focussed on a 145kW six-phase SPMSM with two distinct rotor structures (inner and outer rotors)