定子斜槽高压感应电动机三维磁场与运行性能分析

Analysis of Operating Performance and Three Dimensional Magnetic Field of High Voltage Induction Motors with Stator Chute

针对高压感应电动机转子斜槽在工艺上的困难,提出了在定子上采用斜槽结构的设计方法。建立求解定子斜槽高压感应电动机的三维非线性瞬态场数学模型。通过对电机进行三维实体建模,并采用基于T,ψ-ψ电磁位对的三维有限元法对定子斜槽的高压感应电动机额定工况进行分析计算。分析了定子斜槽后电机基波磁场和齿谐波磁场沿轴向的分布情况,并研究了斜槽对主要齿谐波磁场的削弱作用,进一步对比分析了斜槽与直槽额定工况下主要性能参数,计算结果表明,定子斜槽高压感应电动机电气性能优于直槽电机,并大幅降低了齿谐波。

In view of the difficulties on technology of rotor chute in high voltage induction motor,the design method adopted stator chute structure is put forward. The mathematical model of three dimensional nonlinear transient field for solving stator chute in high voltage induction motor is set up. Through the three dimensional entity model of motor,three dimensional finite element method based on T,ψ-ψ electromagnetic potential is adopted for the analysis and calculation of stator chute in high voltage induction motor under rated condition. The distributions along axial of fundamental wave magnetic field and tooth harmonic wave magnetic field are analyzed after stator chute,and the weakening effects on main tooth harmonic magnetic field are researched. Further more,the comparison analysis of main performance parameters of chute and straight slot is carried out under rated condition.The results show that the electrical performance of stator chute is better than that of straight slot in high voltage induction motor,and the tooth harmonic has been sharply decreased.