一种用于感应电机控制的新型滑模速度观测器研究

提出一种新颖的用于感应电机控制的滑模速度观测器。与传统的滑模速度观测器相比,此观测器具有结构简单、新颖、易于实现的特点,且有效消除了在无速度传感器的电机控制系统中,运用滑模观测器所固有的高频速度抖动现象。该观测器利用电压和电流信号构成观测器估计电机转速、转子磁通值及转子磁通位置,其理论的正确性由李雅普诺夫理论证明。将其运用于采用磁场定向矢量控制方法的无速度传感器感应电机控制系统,实验证明在整个调速范围内都取得了良好的效果,系统具有良好的稳态精度及动态响应性能。

A Novel Sliding-mode Observer for Speed-sensorless Induction Motors

A new sliding-mode speed observer for the speed-sensorless vector control of induction motor is proposed. The proposed algorithm is very simple and eases to implement. Also, the observer reduces the ripple of the motor speed in high frequency range in an efficient way. The observer estimates the motor speed, the rotor flux, the angular position of the rotor flux from measured terminal voltages and currents. The convergence of the proposed observer is examined using the lyapunov theory. Experimental results are presented to show the performance of the proposed observer for the field-oriented vector control of an induction motor drive system. The system has a good performance in speed tracking and has a satisfied accuracy of estimated speed in full speed range.