感应电机滑模观测器矢量控制系统研究

Researches on Vector Control System of Induction Motor Based on Sliding Mode Observer

研究了一种基于滑模观测器的感应电机无速度传感器矢量控制技术。根据感应电机两相α-β静止坐标系下数学模型的特点,设计了一种电流型滑模观测器。利用李亚普诺夫稳定定理,分析和证明了此观测器的稳定性,并在此观测器的基础上,根据等效控制的概念,估算了电机转子磁链和转速。仿真结果表明,基于滑模观测器的感应电机无速度传感器矢量控制技术对于电机启动和突加负载转矩时均能呈现很好的调速性能。

A sliding mode observer is studied based sensorless vector control for induction motor. According to the characteristics of the two phase static coordinate system, a new type of sliding mode observer is designed. Using Lyapunov stability theorem, the stability of the observer is analyzed and proved. Based on the concept of equivalent control, the flux and speed of the motor rotor are estimated. The simulation results show that the speed sensorless vector control technology based on the sliding mode observer can be applied to the motor starting and load torque.