摘要
异步电机在低速运行时,定子电阻受温度、定子频率、定子电流等的影响较大,直接转矩控制系统的性能受到直接的影响。为此,将预测控制算法与全阶状态观测器相结合,对定子电阻进行在线识别,由此构成改进的直接转矩控制系统。在MATLAB/Simulink软件中对上述设计进行仿真研究,仿真结果表明,改进的异步电动机直接转矩控制系统能够提高系统的鲁棒性,使得低速性能得到了较好的改善。
Because the stator resistance is affected by the temperature, stator frequency and stator current greatly, the performance of the direct torque control system is directly affected at low speed. Combining the predictive control algorithm with the full-order state observer and on-line identification of the stator resistance, this article constitutes an improved direct torque control system. The simulation results on MATLAB/simulink software show that the improved direct torque control system of asynchronous motor can improve the robustness of the system and improve the performance at low speed.
出处
《微型机与应用》
2017年第14期86-88,91,共4页
Microcomputer & Its Applications
关键词
异步电动机
直接转矩控制
预测控制算法
状态观测器
电阻在线识别
induction motor
direct torque control （DTC）
predictive control algorithm
full-order state observer
on-line identification of the stator resistance
