A comparison of 2D and 3D analysis methods for the prediction of cogging torque in an electrical machine having skewed slots

摘要

Two-and three-dimensional computations of the cogging torque in a brushless dc motor are compared with measurements for both skewed and unskewed stators. The modeling of stator skew is considered both using a full three dimensional model with and without material anisotropy and using a set of displaced two-dimensional slices. The errors inherent in the latter approach are discussed. A cost/benefit trade-off between three-dimensional and two-dimensional analyses is considered.