改进型ADRC的感应电机定子磁场定向矢量控制

针对感应电机定子磁场定向时，定子磁链和定子q轴电流没有完全解耦这一问题，提出改进型自抗扰控制器(active disturbance rejection controller，ADRC)的定子磁场控制方法。建立关于定子磁链和定子电流的状态空间表达式。利用线性跟踪微分器对目标定子磁链安排过渡过程，从而改善闭环控制中“快”与“准”的矛盾。建立并联型线性扩张状态观测器替代线性扩张状态观测器对实际磁链与q轴电流耦合部分进行观测。在目标磁链闭环控制环节对观测的耦合部分实施补偿，并对系统稳定性进行分析。仿真试验对比该方法与传统ADRC和解耦器控制方法时定子磁链的稳定性和电机转速响应情况。结果表明：该方法简化了矢量控制系统结构，提高了定子磁链控制的稳定性，确保电机运行过程有良好的动态响应特性和鲁棒性。

Research on stator field oriented vector control of induction motor based onimproved ADRC

Aiming at the problem that stator flux and stator q axis current are not completely decoupled when the induction motor stator magnetic field is oriented,a stator magnetic field control method of improved ADRC(active disturbance rejection controller) is proposed.The state space expression of stator flux is established and the transition process of input target flux is arranged by linear tracking differentiator, so as to improve the contradiction between fast and accurate in the closedloop control.A parallel linear expansion state observer is established to observe the actual flux and coupling parts.Finally,the coupling part of the observation is compensated in the closed loop control of the target flux linkage and the system stability is analyzed. The simulation experiments compare the flux stability and speed response of the motor with traditional ADRC and decoupling controller. The results show that the proposed method simplifies the system structure, improves the stability of stator flux control, and ensures good dynamic response and robustness of the motor.