A New Partitioned-Rotor Flux-Switching Permanent Magnet Motor With High Torque Density and Improved Magnet Utilization

In this paper, by incorporating the new concept of “partitioned structure,” a type of new partitioned-rotor flux-switching permanent magnet (PR-FSPM) motors is proposed, where the parallel and serial magnetic circuit topologies are involved, respectively. The topologies and the operation principle of the two motors are introduced first. Then, by using the finite-element method, the basic electromagnetic performances are analyzed. Moreover, the two proposed motors and the conventional 12/10-pole FSPM motor are quantitatively compared, in terms of their output torque, torque capability in per unit PM volume, as well as torque-speed and power-speed characteristics, in detail. Both the theoretical analysis and simulation results indicate that the proposed motors not only can retain the high torque density and efficiency but also can avoid the stator flux leakage and improve the PM utilization significantly.