同时给出了其牵引绕组电压、电流等系统主要参数的计算。
The system interface parameters calculation, such as input voltage and cur-rent for traction windings is also presented.
结合TAO649D机车牵引电机的结构参数，首先建立了该直流电机的数学模型，设计了该电机的转速，电流双闭环系统。
Combined with the structural parameters of TAO649D traction motor, the mathematic model of the DC motor is built and its speed and current dual-closed-loop system is designed.
对石太客运专线牵引供电系统AT所差动电流保护的基本原理进行了简要介绍。
Briefly introduces the basic principles for at post differential current protection of traction power supply system in Shijiazhuang-Taiyuan passenger dedicated lines.
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