感应电动机无速度传感器矢量控制优化算法  

A Simplified Speed Sensorless Vector Control Method of Induction Motor for Electric Vehicles

作　　者：江金鱼[1] 黄磊[1] 杨春杰[1] 

机构地区：[1]湖北理工学院,黄石435003

出　　处：《微特电机》2016年第5期75-76,82,共3页Small & Special Electrical Machines

基　　金：湖北省自然科学基金项目(2014CFB177)

摘　　要：电动汽车无速度传感器矢量控制需要估计电机转速,利用电压模型估计转速用到的电机参数少,算法简单,但由于纯积分环节的存在,会导致积分输出漂移和饱和。常规的抑制办法是采用滤波器,但会带来较大的幅值与相位误差,影响速度观测精度甚至导致系统失稳。为了解决因纯积分导致的问题,提出了一种改进的电压模型转速估计算法,该算法不含滤波器,而是利用定子侧反电势获得同步转速进而估算电机转速,避开了电机电流的微分运算以免放大检测噪声,不需要预测下一拍电流,算法简单有效,易于实现。最后实验验证了所提方法的正确性和有效性。In the speed sensorless vector control of induction motor for electric vehicles,a speed estimator is very important. Conventional voltage model- based method is simple,but there are errors in this method caused by the DC drift and initial value problems of the pure integration. When the low- pass filter is adopted to overcome this problem,amplitude and phase errors are introduced and this will degrade the accuracy of the speed estimation. To overcome this pure integration problem,a modified voltage model- based method without low- pass filter was proposed in this paper. The speed estimation was based on the back EMF of stator winding with no need of differential operation of the stator currents,which may cause noise amplification. The proposed method is simple,effective and easy to implementation. Experimental results verify its feasibility.

关 键 词：感应电动机 电压模型 转速估计 矢量控制 

分 类 号：TM346[电气工程—电机]