基于自适应状态观测器的异步电机无速度传感器矢量控制系统

Speed-sensorless Vector Control System of Induction Motor Based On Adaptive Full-order Observer

异步电机无速度传感器矢量控制系统是目前研究的热点,本文采用一种闭环磁链观测器,即自适应状态观测器对转子磁链进行观测,与传统开环电压、电流模型相比,观测效果更好。在转子磁链观测的基础上,采用PI型自适应律,对转速进行了辨识。最后,通过Matlab仿真验证了本文给出的异步电机无速度传感器矢量控制系统的可行性,仿真结果表明该系统具有较好的动、静态性能,并具有一定的抗干扰能力。

The sensorless control system of induction motor has already been a popular problem. In this paper, a closed-loop adaptive full-order observer is used to estimate the rotor flux. The effect of this observer is better than the traditional open-loop voltage and current model. Based on this closed-loop observer, a PI adaptive law is used to estimate the rotor speed. Finally, the results of Matlab Simulation show that the sensorless control system of induction motor in this paper has satisfied estimation precision and dynamic performance while having a certain anti-interference ability.