采用自抗扰控制器解决异步电动机调速系统参数鲁棒性问题

针对异步电动机难以建立精确的数学模型和采用PI调节器矢量控制系统参数鲁棒性差的问题,提出用自抗扰控制器控制异步电动机调速系统。自抗扰控制器不需要电动机的精确数学模型,通过扩张状态观测器估计电机模型中的耦合项及参数摄动等引起的总扰动并加以补偿,实现了磁链和转矩的完全解耦。在观测磁通的基础上,建立了无速度传感器矢量控制异步电机调速系统。仿真结果表明,此控制方案有较好的稳定性和很强的鲁棒性。

Parameter Robustness in Asynchronous Motor Speed Control System Implemented by Auto Disturbance Rejection Controller

For the asynchronous motor is difficult to establish accurate mathematical model and PI regulator parameter vector control system robustness is poor.An ADRC control induction motor drive system is proposed.A ADRC does not require accurate mathematical model of the motor.The extended state observer estimates the motor coupling terms in the model and parameter perturbations causing disturbance and to compensate.Flux and torque achieve a complete decoupling.On the basis of the observed flux,a speed sensorless vector control induction motor system is established.Simulation results show that this control scheme has good stability and strong robustness.