牵引电动机无速度传感器带速重投解决方案

为了解决无速度传感器交流牵引传动系统带速重投问题,在分析列车运行状态及牵引电机带速重投问题产生原因的基础上,提出了在列车正常运行中利用再生发电状态取代惰行工况的解决方案,并利用Matlab/Simulink仿真验证了该方法的有效性.以动车组CRH3和电力机车HXD3的参数为例,计算了该方案对列车速度和运行时分的影响.研究结果表明,相对于惰行过电分相,该方法对速度大于200 km/h的动车组造成的速度损失和时间损失均小于2%;对速度大于60 km/h的重载货运列车造成的速度损失和时间损失均小于7%.

Solution for Speed Sensorless Control System Restarting at Unknown Speed of Traction Motor

In order to solve the problem that a traction motor may restart at unknown speed when a speed sensorless control system is applied in electric traction drives,a new strategy using regenerative mode to replace coasting mode is presented on the basis of analyzing the train’s operating state and the root causes of this problem,and the effectiveness of this method is verified by numerical simulation using Matlab/Simulink.Taking the parameters of the electric multiple unit(EMU) CRH3 and the electric locomotive HXD3 for example,the influence of this strategy on speed and running time of the motor train is calculated.The results show that compared with those of passing the phase insulator under coasting mode,the loss in both of speed and running time is less than 2% for the EMU running at a speed more than 200 km/h,and less than 7% for heavy haul freight train running at more than 60 km/h.