异步电动机直接转矩控制系统的Simulink仿真

在分析了异步电动机直接转矩控制(DTC)基本原理的基础上,对目前DTC研究中不同的控制策略进行了比较,提出了一种采用Matlab/SimulinkPSB建模和仿真DTC工作过程的简便方法。该方法通过d—q坐标系下建立的异步电动机数学模型,采用带滞环的比较器控制转矩、磁链和磁链幅值,建立了一种简便的开关选择表,成功实现了对异步电动机转矩和转速的直接转矩控制,为进一步改善DTC系统性能及投入实际工程应用奠定了基础,并给出了仿真结果

Simulation of Direct Torque Control System for Asynchronous Motor by Simulink

In this paper,the principle of direct torque control(DTC) for asynchronous motor(AM) is presented,and some different control strategies are compared.The authors explain a simple method of modeling and simulating operation process for DTC system by Matlab/Simulink.The mathematic model of asynchronous motor is established under d-q coordinates.In the DTC controller,the torque,flux and flux magnitude are all controlled by a hysteresis comparator.A simple switch select table is established.The torque and the speed of asynchronous machine are controlled successfully,which make it possible to improve the system performance and apply it to practice in following work.The simulation results are presented.