摘要
将滑模变结构控制方法应用于感应电动机直接转矩控制系统,介绍了一种自适应滑模状态观测器。以定子电流和转子磁链为状态变量,利用定子电流的测量值与观测值的误差构成滑模面,设计滑模观测器,对转子磁链进行估计。采用李雅普诺夫稳定性理论证明了观测器是渐近稳定的,导出了转速自适应律。将转速观测值用于感应电动机的无速度传感器直接转矩控制系统,实验结果表明驱动系统具有优良的动、静态控制性能。
A novel adaptive sliding-mode observer for the space vector direct torque control induction motor drives was proposed, in which the principles of sliding-mode control, direct torque control （DTC） , and space-vector modulation were combined to ensure high-performance operation. This observer employed stator currents and rotor flux as the state varia- bles. The sliding-mode observer was designed to obtain the rotor flux by using the error of the stator current. The conver-gence of the observer was proved by Lyapunov stability theory. Consequently, the adaptive law of the speed was derived. The experimental results show that the driving system has excellent dynamic and static control performance.
出处
《微特电机》
北大核心
2013年第10期64-66,69,共4页
Small & Special Electrical Machines
基金
国家自然科学基金资助项目(60974009)
