基于矢量控制的异步电机自抗扰控制

Asynchronous motor active disturbance rejection control based on vector control

针对异步电机矢量控制系统在负载变化和电机参数变化时转速易受较大影响的问题,研究了采用自抗扰控制器(ADRC)对负载扰动和电机参数变化进行估计和补偿的方法。根据自抗扰控制器的数学特征和异步电机的数学模型,采用扩张状态观测器(ESO)对电机模型的参数摄动和变量耦合项进行观测并补偿,确定了矢量控制系统中自抗扰转速环控制器、自抗扰磁链环控制器、自抗扰d轴电流环控制器和自抗扰q轴电流环控制器的形式。仿真和实验结果表明,与传统的比例积分控制器(PI)相比,ADRC控制器对系统负载扰动和电机参数变化具有较好的鲁棒性和动态性能。

For induction motor vector control system, the problem is that speed is easy to be influenced by load and motor parameters. In this paper, the estimation and compensation method of load disturbance and motor parameters based on active disturbance rejection controller ( ADRC ) is studied for induction motor vector control system. According to the mathematical characteristics of ADRC and the mathematical model of asynchronous motor, the extended state observer ( ESO) was used to observe and compensate parameter disturbance of motor model and variable coupling term. Speed loop ADRC controller, flux loop ADRC controller, d-axis current loop ADRC controller and q-axis current loop ADRC controller were de-termined. The simulations and experiments were performed for induction motor vector control system with ADRC controller or PI controller. The results show that ADRC controller has better robustness and dy-namic performance.