转子槽形及材料对复合笼条转子感应电动机运行性能的影响

Influence of rotor slot and material on IMCCR operating performances

针对实心转子感应电动机运行性能相对较差这一问题,提出了在转子槽上下层采用两种不同材料的复合笼条转子感应电动机设计方法,其中上层采用导电导磁的合金材料。基于二维正弦时变场计算电机的运行性能,通过改变转子笼条形状和材料的特性,研究使用导电导磁材料和导电不导磁材料对转子槽和齿部磁场的分布及电机性能的影响,并对不同负载运行情况进行了计算。根据计算结果与实测结果的对比分析后表明,转子槽形及材料特性对电机磁场分布和运行性能有一定的影响,为电机优化设计提供参考依据。

A new type of induction motor with compound cage rotor （IMCCR） composed of two different materials which include cast - aluminum and alloy is proposed, and the starting performances of the motor are improved using alloy material in the upper bars which can conduct magnetism and electricity. The operating performances of the motor are analyzed in the paper by using the Finite Element Method （FEM） employed to solve the two dimensional （2D） sinusoidal time-varying field, and the effect on the electromagnetic field distribution of rotor tooth, rotor slot and the motor performance is computed on the condition that the bar shape and material characteristics are changed. Also, some work is given to the analysis of the prototype motor＇ s operation performances at different loads. The calculated results compared with those of test values show that the rotor slot and material Characteristic have some effects on magnetic field distribution and motor performance, and the characteristics and the future applications of this kind of motor are concluded, which could help optimum design of induction motors.