基于模型参考自适应的直线感应电机无传感器控制系统研究

Research on Sensorless Control System of Linear Induction Motor Based on Model Reference Adaptive

设计了一种基于模型参考自适应的直线感应电机无传感器矢量控制系统。首先推导单边直线感应电机的数学模型,其次设计基于次级磁链的模型参考自适应转速观测器,实现在低速环境下对电机实际速度的准确观测,最后将该观测器应用于直线感应电机控制系统内。仿真结果表明该系统响应能够迅速达到稳态,误差小、动静态性能良好,验证了模型参考自适应系统应用于直线感应电机无传感器控制的正确性与可行性。

A sensorless vector control system of linear induction motor based on model reference adaptive is designed.Firstly,the mathematical model of unilateral linear induction motor is deduced.Secondly,a model reference adaptive speed observer based on secondary flux is designed to accurately observe the actual speed of the motor in low-speed environment.Finally,the observer is applied to the control system of linear induction motor.The simulation results show that the system response can reach the steady state quickly with small error and good dynamic and static performance,which verifies the correctness and feasibility of the model reference adaptive system applied to the sensorless control of linear induction motor.