Performance Comparison of Conventional and V-Shape Magnets Sandwich Flux-Switching Permanent Magnet Machines with Modular Rotor Topology

Conventional flux-switching permanent magnet brushless machines (PMFSM) gained a lot of attraction due to their high torque densities, simple and robust rotor structure, and the permanent magnets and coils on the stator. The sandwich PMFSM and V-shaped magnets PMFSM machine has been proposed to improve the torque density of the machine in which two PM pieces are sandwiched in one stator pole to enhance the PMs usage efficiency. 2D finite element analysis (2DFEA) method is employed to compare the performance of conventional and V-shape magnets sandwich PMFSM with modular rotor topology, in terms of flux linkage, flux distribution, induced back EMF, cogging torque and average torque. From the results it is shown that both motors have almost produced same flux linkage and Sandwich PMFSM generates slightly high torque than V-shape magnets sandwich PMFSM with modular rotor.