Optimal design of a V-type consequent-pole motor with shifted PMs for reducing the PM usage and the torque ripple

Abstract

Surface-mounted permanent magnet synchronous machines (SPMSM) have low field weakening capability. This fact limits the implementation of these machines in high-speed applications. This paper proposes a winding changeover scheme, which realizes the multi-speed operation of the SPMSM, decreases induced back EMF by 6.33 times, and increases the base speed of the machine by 7.33 times.There are four possible winding configurations, which resultin a different amount of back EMF. To verify the roposed scheme, the finite element method (FEM) simulation resultsare provided.