导磁导电复合笼条转子感应电动机性能计算

Calculation of performance in induction motor with compound cage rotor of permeability and conductive material

为了研究既导磁又导电的复合材料作为高功率电机的转子材料时对其性能的影响,对37k W感应电动机进行了复合材料和普通铸铝材料的对比分析。采用二维电磁场有限元计算方法,建立了37k W感应电动机的数学模型和物理模型进行分析。在考虑工艺可行性的情况下,优化设计了三种适合复合笼条嵌入的转子槽型,分析复合材料放置位置对电机起动性能和运行性能的影响。同时,改变转子槽内合金材料的宽度,分析复合材料放置面积对电机起动和运行性能的影响,并与采用相同机座号的普通铸铝材料的感应电动机进行性能比较,证明了复合笼条转子应用于37k W感应电动机具有优越的起动性能和良好的运行性能,为新型感应电机设计和电工材料的选取提供一定的可行参考。

A new type of compound material, both electric and magnetic, was applied to the rotor bar of the high power density induction motor. To investigate the influence of the new material on the perform- ance, the machine was analyzed by comparing with a 37kW conventional motor, of which the rotor bar is manufactured by cast aluminum. The mathematical and physical models were established and calculated by using two-dimensional finite element method （2D FEM）. Considering the technological feasibility, three slots, which are suitable for the installation of the compound squirrel-cage bars, were designed, and then the influence of the location area of the compound material on the stating and operating performance of the motor was analyzed. Compared with the conventional induction motors, it shows that the new motor fabricated by using compound material has great starting and operating performances than the conventional machines. The studies provides meaningful references for the design of the novel induction motor and the selection of the electric materials.