According to temperature changes of the DC traction motor in continuous operation, the fan motor speed is controlled, and the purposes of regulation of ventilation and energy-saving are achieved.
根据直流牵引电动机在持续运行中的温升变化控制通风机的电动机转速，实现通风量调节，以达到节能目的。
The fuel cell is connected with traction motor inverter directly and connected with the secondary battery and DC/DC convert in series.
燃料电池与牵引电机逆变器直接相连，与辅助电池和DC/DC器串联。
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.
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。
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