As seen from the Table V, the torque ripples of the two ORSPM models (OD2 and OD3) are very similar.
The cross-sectional view of the OR-SPM with OD2 and OD3 are given in the Fig.
One of the two holes is located in the patterned region 1 and the other is in the patterned region 2 for the OR-SPM with OD3, whereas both two holes is located in the patterned region 1 for the OR-SPM with OD3.
24 for OD2 and OD3. It is observed that the energy variation still continuing.
56.7% and 55.3% improvement in the torque ripple value of models that are named as OD2 and OD3 was achieved, respectively.
The Hole Location in P1 for OR-SPM machine with OD2 (a) The Hole Location in P2 for OR-SPM machine with OD3 (b)