电源频率对三相交流异步牵引电动机影响的探讨

Probe into the Affect of Line Frequency to 3-phase AC Asynchronous Traction Motor

通过对三相异步牵引电动机的特点、结构、参数的分析，结合异步电动机用于机车做为牵引动力的特定工况，提出了在同一转差率下，低频区电动机输出转矩下降、机械特性变软的问题，从理论上分析了问题产生的原因，并针对这两个问题提出了作者的看法。

Through analysis of the characteristics, structure and parameter of 3 -phase asynchronous traction motor,in regard to its specific role as traction power in locomotive, the author put forward the problems that with the same slip ratio, in low frequency stage, the output torque of motor goes down and the mechanical characteristics become 'soft'. Theoretically,the auther analyses the cause for the problems and airs his view on these two problems.