本文主要探讨了交—直—交传动机车轮径偏差、异步牵引电动机转矩和电流偏差、轮周牵引力偏差以及电动机转差率之间的数量关系。给出的计算公式不要求知道牵引电动机的具体特性参数和供电电压及频率,适用于牵引电动机尚未设计出来前,对交—直—交传动机车的总体方案进行分析研究。文中还对上述偏差及牵引电动机转差率的数值提出了建议。 This paper mainly discusses the relationship between the wheel diameter deviation, the torque and current deviation of the asynchronous traction motor, the deviation of the wheel circumference traction and the slip of the motor. The formula given is not required to know the specific characteristic parameters of traction motor and the supply voltage and frequency. It is suitable for the analysis and study of the overall scheme of the AC-DC-DC transmission before the traction motor is designed. The article also made a suggestion on the above deviation and the value of traction motor slip.