新型无速度传感器直接转矩控制系统

A new speed sensorless technology for direct torque control of induction motors

无速度传感器技术中最常用的方法是自适应观测器,观测器的增益和速度自适应律决定了观测器的性能。传统采用极点配置方法的自适应观测器存在区域不稳定的问题,针对此缺陷提出了一种基于线性矩阵不等式的新型观测器。仿真结果表明:新型观测器克服了传统方法存在的区域不稳定的缺点,能够在全速范围内准确辨识转速。

The speed -adaptive observer is the most commonly used method in the speed sensorless technology, the observer gain and the speed - adaptation law determine the properties of the observer. Traditional observer that using the pole - placement technique exist the problem of unstable regions, a new observer based on linear matrix inequalities is proposed for this problem. Simulation results show that new observer overcomes the disadvantage of the existence of the unstable regions and can identify speed accurately in full speed region.