In this paper, an investigative study on the effect of various notch depths and notch location angles in the U-core stator permanent magnet motors is presented, which aims to obtain the proper design combination of notch parameters for the better motor performance. Finite element method is carried out for the motor performance evaluation such as the starting torque, cogging torque as well as the phase back-EMF. The results show that there are certain ranges of the notch depth and the notch location angle to generate the larger back-EMF and starting torque with less cogging torque. Finally, the Simulink models are built and the prototypes are tested for their dynamic performance comparison.
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