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Among various types of motors, Permanent Magnet (PM) motors, due to their high energy density are mainly used for electric based propulsion systems. In this paper an improved analytical model for PM motor has been presented. The model takes into account important factors such as, armature reaction, slotting effect and influence of non-linear material property on motor's behavior. Moreover, the main contributions of this work is representation of stator windings with exact winding width using Fourier series and consideration of effects of non-linear ferromagnetic material property. Using this model it is possible to determine air-gap magnetic field, flux linkage, back emf, cogging torque and electromagnetic torque with high accuracy. Results from the proposed model are compared with other analytical model and also with those from finite element analysis (FEA). The results obtained from the proposed method match closely with the FEA.Index Terms-Analytical models, cogging torque, electric vehicle, magnetic field, permanent magnet. 0018-9464 (c)

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