抄録
This paper describes a method to analyze hamonic magnetic fields on squirrel-cage induction motors considering rotor skew and higher harmonics in the secondary current. The proposed method is based on a 2-dimensional finite element method. The rotor skew structure is considered by plural 2-D finite element mesh models, produced in suitable axial positions, and the magnetic field in each mesh model is calculated by the revised secondary current taking account of the skew effect.
The secondary currents, magnetic flux densities and electromagnetic forces are calculated by the proposed method. Then the differences between a skew rotor and a no-skew rotor are discussed. From the comparison between calculated and experimental results, the proposed method is shown to be appropriate and useful for quantitative estimation of harmonic components on induction motors.
