关键词: 永磁同步电机, 同步磁阻电机, 绕组切换, 电感, 不均匀气隙

Abstract: Permanent magnet synchronous reluctance motor(PMSRM), which combines the advantages of permanent magnet synchronous motor (PMSM) and synchronous reluctance motor (SRM), has been widely used in electric vehicles and is a research focused issue in the field of motor. Two PMSRMs were designed with spoke pole and V-shape pole respectively. In each motor, the windings could be switched in series or parallel, so as to further broaden the speed range of the motor. In order to reduce torque ripple, the motor adopted uneven air gap.The characteristics of alternating and direct axis inductance of two kinds of rotor motors in stator winding series and parallel mode were analyzed, as well as the influence of uneven air gap on the performance of the motors. The research shows that the V-shape magnetic pole has larger salient pole ratio than the spoke magnetic pole, which can obtain larger reluctance torque when the motor runs in series, and reasonable uneven air gap can improve the performance of the motor. The test results of the prototype verify the correctness of the above analysis.

Key words: permanent magnet synchronous motor(PMSM), synchronous reluctance motor(SRM), winding switching, inductance, uneven air gap