基于观测器的无速度传感器感应电机控制

为了辨识感应电机的转速,提出了一种模型参考自适应观测器.该观测器基于模型参考自适应系统(model reference adaptive system,MRAS),将感应电机和全阶观测器分别作为参考模型和可调模型,基于两模型输出之间的误差构造了一个自适应律,通过自适应律不断调整观测器的参数,全阶观测器的输出将实现对实际系统输出的跟踪,并用李雅普诺夫稳定性定理验证了系统的稳定性.理论分析和仿真结果表明,所提出的感应电机无速度传感器矢量控制系统的转速辨识方法具有令人满意的动静态性能.

Study on the Speedless Sensor Control of Induction Motor Based on Observer

To observe speed parameter of induction motor,this paper proposes a model reference adaptive system(MRAS) observers.This strategy takes induction motor as the reference model and full-order rotor speed observer as the adjustable model.To formulate a self-adaptive algorithm,Lyapunov theorem of asymptotic stability is used according to output errors between two models.The output of full-order rotor speed observer will track the output of the actual system.Simulation results show that the proposed strategy used for speed identification in the speedless sensor vector control system is theoretically possible and has satisfactory performance.