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Design Considerations of Fault-Tolerant Permanent Magnet Vernier Machine

This article investigates some design considerations of fault-tolerant permanent magnet vernier (PMV) machines. The key of this article is to provide a holistic approach to analyze and design fault-tolerant permanent magnet vernier machines. The electromagnetic performance, including torque density, fault-tolerant capability, and power factor are taken into consideration by using air gap permeance and magnetic equivalent circuit models. Hence, the proper slot–pole combination and structure parameter of the fault-tolerant PMV machine can be selected. Then, the finite-element models of the typical machines are established to verify these analyses. Finally, the experiments on a prototype machine are conducted, verifying the effectiveness of theoretical analyses.