本文就交—直—交电传动内燃机车,阐明了牵引发电机的外特性;利用有关文献资料推导出逆变器负载电流与牵引发电机整流电压之间的理论关系,揭示了部分工况下机车牵引功率和启动牵引力与柴油机转速之间的关系;并以DE2500型和Am6/6型机车为实例旁证了牵引发电机的设计功率等于实际需要功率难以付诸实现。 In this paper, the AC-DC diesel locomotive is elaborated and the external characteristics of the traction generator are clarified. The theoretical relationship between the load current of the inverter and the rectified voltage of the traction generator is deduced based on the literature, Locomotive traction power and starting the relationship between traction and diesel engine speed; and to DE2500 and Am6 / 6 locomotive as an example next to the traction generator design power is equal to the actual need of power is difficult to put into practice.