无传感器矢量控制系统及其速度估算的研究

基于同步轴系下的感应电动机电压磁链方程式,提出了一种感应电动机转子磁场定向的矢量控制方法,利用在同步轴系中q轴电流的误差信号实现对电动机速度的估算.在该无传感器矢量控制系统中,由于采用了经典的PI调节器,使得控制系统更为简单.最后利用MATLAB建立仿真模型,通过仿真验证了该控制系统具有良好的动态和静态性能.

Research of Sensorless Vector Control System and Speed Estimation

Based on the synchronous reference frame, the voltage equation in terms of flux linkage of induction motor was deduced, a vector-controlled approach based on the rotor field orientation control was proposed as well. Error signal of the stator q-axis current in the synchronous reference frame was utilized to attain the induction motor speed. Because classical PI controllers was used, the structure of the sensorless vector control was very simple. Simulation results based on MATLAB 6.1 demonstrate that the proposed vector control scheme is valid, and the dynamic and static performance are quite well.