Abstract
This paper compares winding function theory (WFT) method and finite-element analysis (FEA) method simulation results for calculating electromagnetic torque and inductances of an outer-rotor, inner-stator field regulated reluctance machine (FRRM) for flywheel energy storage application under linear condition. Both methods consider the salient pole rotor geometry, the stator slot effects, and the stator windings distribution. The WFT results are compared with two-dimensional FEA results. The two methods give approximately the same results, but WFT requires less computational time.
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