关键词: 感应电机, 杂散损耗, 定子齿, 气隙磁场, 有限元分析

Abstract:

In order to study the stator tooth size for stray loss reduction, the theory of harmonic mag-netic field in induction motor was analyzed. Taking an 11 kW motor with aluminum casting rotor as an example, the loss prediction model was established based on finite element method, and the influence of stator tooth size on the stray losses were analyzed. It was found that the effecting sequences of four main factors for stray loss were as follows: tooth tip loop height , tooth tip width , tooth width and tooth tip height. Further, by combining the above analysis , stator tooth size was optimized, so that the stray loss of 11 kW motor was reduced about 29.8 W, which took up 23.4% of the stray loss before optimization, on the premise of original torque performance.

Key words: induction motor, stray loss, stator teeth, air gap flux density, finite element method