感应电机直接转矩自抗扰控制系统仿真研究

Simulation of Active Disturbance Rejection Control on Direct Torque Control of Induction Motor

在三相感应电机调速系统中,传统的PI调节器不能满足大范围高精度调速的要求.本文采用自抗扰控制器部分组件取代PI调节器构成新型闭环调速系统,利用扩展状态观测器（Extended StateObserver,ESO）对控制对象的参数变化进行估计,并经过非线性组合（Non-Linear State Error Feedback,NLSEF）的方法对模型进行补偿.仿真比较表明：在感应电机直接转矩控制系统中,基于模型观测与补偿技术的调速方法在高速区相当于PI调节器,中低速区的性能优于PI调节器;应用模型观测与补偿技术可以对模型参数的变化敏感性下降,对不同转速运行的电机具有大范围适用性.

The traditional PI controller can not satisfy the demands of large range and high accuracy speed-regulation of 3-phase induction motor.A novel closed-loop speed regulation system was developed by using some components of active disturbance rejection controller（ADRC）,which took place of the PI controller.The proposed system used extended state observer（ESO） to estimate the parameter variations,which indicates the controlled behaviors,and used the non-linear state error feedback（NLSEF）method for its model compensation.The simulation based on the regulation method of observation model and compensation technique was conducted.The simulation results proved that the proposed system showed the same performance as that of the PI one in higher speed,and better performance than that of the PI in medium and low speed.The system is less sensitive to deviations of the model parameters.It suits for large range of motor speed.