转子槽形对笼型电机附加损耗的影响

Influence of Rotor Slot on Additional Loss of Cage Induction Motor

电机的附加损耗影响着电机的温升与效率,其数值大小受电机铁心结构的影响。本文详细讨论了笼型电机附加损耗的产生原因及计算方法,分析了通过改变槽形降低附加损耗的可能。文中通过建立多个不同转子槽形的电机模型,并利用二维有限元法分别对各个模型的定转子铁心与导条中的附加损耗进行了计算和分析。对比其结果发现,电机的附加损耗值随着转子槽形的改变而变化,尤其是转子槽宽对其影响显著。这意味着合理的优化转子槽形可以作为降低附加损耗的一项有效措施。

The additional loss plays an important role in motor＇s temperature rise and efficiency characteristic, which numeric value is influenced by core structure in motors. In this paper, the cause and calculation method of additional loss in cage induction motor were discussed in details, and the possibility of decrease the additional loss by changing slot＇s shape has been analyzed. Models of different rotor slot were established and additional loss in the core and rotor bars were calculated desperately by 2-D finite element method. The conclusion could be obtained by comparison and analysis, the additional loss was influenced by rotor slot, especially the slot＇s width. It means that, optimization of rotor slot could be taken as an effective method for reducing motor＇s additional loss.