Abstract
A dual-rotor axial field flux-switching permanent magnet (DRAFFSPM) machine is proposed and investigated in this paper. The static characteristics, such as the field distribution, the PM flux-linkage, the back-EMF, and the cogging torque, etc., are investigated based on the 3D finite element (FE) method. In order to gain sinusoidal back-EMF and reduce the cogging torque, the structure of the DRAFFSPM machine is optimized and the rotor pole displacement is adopted to reduce the cogging torque further. It shows that the phase back-EMF is sinusoidal, and the machine can be used as a permanent magnet brushless AC motor.
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