A High-Torque Flux-Modulated Permanent Magnet Motor With Reduced Low-Order Spatial Harmonics

In this paper, a new outer-rotor permanent magnet motor is proposed. The stator teeth are split to modulate the magnetic field and Halbach PM arrays are adopted to improve its torque density. To reduce the low-order spatial harmonics in the airgap, flux barriers are added to the stator yoke. Besides its structure and working principle, the design of the proposed motor is also introduced. The motor performance is analyzed by finite element analysis in comparison with a conventional PM motor.