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The split ratio has been optimized for the maximum torque density when the airgap flux density is fixed in existing papers. However, the airgap flux density can vary with the split ratio significantly in interior permanent magnet (IPM) machines due to flux focusing. Therefore, an optimal airgap flux density may exist, together with the optimal split ratio, for the maximum torque in IPM machines. This...
A simple analytical method is developed for determining the optimal combination of stator pole and rotor pole numbers for maximum torque from a multi-tooth flux-switching permanent magnet (FSPM) machine. In addition, the rotor pole width and split ratio are optimized by finite element analysis. The optimized multi-tooth FSPM machine exhibits a significantly larger torque capability and requires a...
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