应用Simulink电动轮车辆轮边电机输出转矩波动分析

发布时间：2018-01-13 02:31

本文关键词：应用Simulink电动轮车辆轮边电机输出转矩波动分析　出处：《机械设计与制造》2017年05期 　论文类型：期刊论文

【摘要】：电动轮车辆在短距离大载重运输中应用普遍,当驾驶员指令突发大幅度变化时,电机可快速响应,但输出转矩波动较大,对系统冲击较大,针对此进行分析。根据电动轮特点,电机采用低速区转矩输出稳定矢量控制,很好实现异步电机转矩与磁链解耦,进而控制电机输出转速。基于Simulink电机矢量控制模型,搭建电传动系统模型,对不同工况电机响应及转矩波动进行分析。针对转矩波动,从控制模型入手分析影响转矩脉动的原因及应对方法。结果可知:设定转速不加负载、转速发生突变、转速缓慢增加、定负载运行等几种工况下,电机调速性能良好,响应迅速;转速发生突变时,电机对于速度响应很好,但在指令改变瞬间,电机输出转矩波动很大,且衰减很快,0.5s左右恢复正常;通过减小脉冲发生器中误差宽度、转子磁链给定值、调整转子时间常数等可有效达到稳定转矩的目的;为进一步实车测试提供参考。
[Abstract]:Electric wheeled vehicle is widely used in short distance and large load transportation. When the driver's instruction changes suddenly and greatly, the motor can respond quickly, but the output torque fluctuates greatly, and the impact on the system is great. According to the characteristics of electric wheel, the motor adopts torque output stable vector control in low speed, which can decouple the torque and flux of asynchronous motor. Then the output speed of the motor is controlled. Based on the vector control model of the Simulink motor, the electric drive system model is built to analyze the motor response and torque ripple under different working conditions. Starting with the control model, this paper analyzes the causes and countermeasures of torque ripple. The results show that: no load, sudden change of speed, slow increase of speed, constant load operation and so on. Motor speed regulation performance is good, rapid response; When the rotational speed changes, the motor responds well to the speed, but at the moment of the instruction change, the output torque of the motor fluctuates greatly, and the attenuation quickly returns to normal for about 0.5 s. By reducing the error width of the pulse generator, setting the rotor flux and adjusting the rotor time constant, the purpose of stabilizing the torque can be achieved effectively. It provides reference for further test of real vehicle.
【作者单位】：广东理工学院;
【分类号】：TH22
【正文快照】： 1引言电动轮车辆结构简单、功率利用率高而被广泛应用于非公路运输,采用柴油发动机和交流电机组成动力源,通过整流逆变驱动轮边电机,整个过程灵活方便、实现无极变速等[1]。对于电机控制系统,当驾驶员指令突发大幅度变化时,要求电机应对突发情况应有较好速度响应,但在指令改变

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