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The paper developed an improved analytical subdomain model for predicting the open-circuit magnetic field in surface-mounted permanent magnet machines accounting for the tooth-tips in the slots. The whole field domain is divided into four types of simple subdomains, viz. magnets, air-gap, slot openings, and slots. The analytical expression of each subdomain is derived and the field solution is obtained...
The paper compares four analytical models, viz. relative permeance (RP), complex permeance (CP), subdomain (SD) based on single slot/pole and exact SD, for predicting electromagnetic performance of surface-mounted permanent magnet brushless machines. The RP model is simple, takes less computational time for predicting electromagnetic torque although modification is often required to account for fringing...
The paper compares five analytical models for predicting the cogging torque in surface-mounted permanent magnet machines, viz. lateral force (LF), complex permeance (CP), and combined CP models, together with subdomain (SD) models based on single slot/pole and exact SD model. The models are evaluated for the cogging torque waveforms and the prediction of optimal pole-arc to pole-pitch and slot-opening...
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