感应电机无速度传感器控制的降阶观测器设计

An Adaptive Observer Design for Sensorless Control of Induction Motors

提出了一种简单的用于感应电机无速度传感器控制的自适应观测器设计方法.该方法以磁链误差作为校正反馈项,利用电流和电压模型组合成一个降阶观测器.在将电机模型和观测器进行线性化的基础上,利用劳斯-赫尔维茨稳定判据和极点配置方法得到了观测器增益,该增益能够保证获得一个全局渐近稳定并具有良好阻尼的感应电机控制系统.数字仿真试验结果进一步验证了所提出的自适应观测器的有效性.

A simple design method of an adaptive observer for sensorless control of induction motors is pro- posed. The current and voltage models are combined into a general reduced-order observer in which a flux error is used for corrective feedback. By linearizing both the induction motor model and the adaptive observer, an ob- server gain providing asymptotically stable and well damped induction motor control system is selected based on the Routh-Hurwitz stability criterion and the pole placement method. Simulation results are presented to vali- date the use and applicability of the induction motor control system.