Design of 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 V-shape magnets sandwich PMFSM machine has been proposed to improve the torque density of the machine in which two PM pieces in V-shape 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 V-shape magnets sandwich PMFSM with salient rotor topology with that of V-shape magnets sandwich PMFSM with modular rotor, in terms of flux linkage, flux distribution, induced back EMF, and cogging torque. From the results it is shown that the salient rotor V-shape magnets sandwich PMFSM and V shape magnets sandwich PMFSM with modular rotor produces 0.03 Wb and 0.02 Wb respectively.