PROJECT TITLE :

Magnetic Field Analysis in Eccentric Surface-Mounted Permanent-Magnet Motors Using an Improved Conformal Mapping Method

ABSTRACT:

This paper presents an improved conformal mapping (ICM) technique for magnetic field analysis in one typical surface-mounted permanent-magnet (SMPM) motor considering the static, dynamic, and mixed rotor eccentricities. The ICM method accurately accounts for the slotting result, the winding distribution, the armature reaction, the magnetic saturation effect, and also the working purpose variation of PMs throughout their volume. The ICM method is also very rigorous to separate the onload air gap field components. Initial, the slotless model of an eccentric SMPM motor is mapped to at least one concentric model employing a new kind of bilinear conformal mapping, and the sector solution is then obtained through applying Hague's answer in the main canonical domain. Second, the slotted air gap magnetic field is obtained through the modulation of air gap magnetic field within the slotless physical domain using the complex relative air gap permeance. The ICM method is additionally used to analyze the influence of rotor eccentricity on the flux linkage of the stator coils. This developed model is validated through comparing with the corresponding results obtained through finite part methodology and therefore the frozen permeability method. This methodology can additionally be used as a tool for design and optimization of electrical machines.