基于自抗扰控制器的异步电机矢量控制

Vector control of induction motors with active disturbance rejection control

针对异步电机的高性能鲁棒问题,采用自抗扰控制理论,设计并实现了基于自抗扰控制器的异步电机矢量控制方案。将电机模型中的耦合项及参数摄动视为系统扰动,采用扩张状态观测器进行观测并加以补偿,简化了系统结构,提高了响应速度。为减小运算量,对自抗扰控制器的典型结构作了简化处理,使控制周期缩短约1/2,提高了实时控制性能。仿真和物理实验表明,该文研究的基于自抗扰控制器的矢量控制系统,在70%额定负载突卸情况下的动态速升仅为0.8%,动态性能优异,对转子参数变化也具有较强的鲁棒性。

A vector control scheme with an active disturbance rejection controller (ADRC) was designed and implemented for robust control of induction motors. The algorithm includes the cross-coupling and parameter variation of the induction motor assystem disturbances, which can be estimated and compensated by an extended state observer (ESO), resulting in faster response with a simplified object. The computation load is reduced by simplifying the conventional ADRC model, so the control response is of a half control period shorted with better real-time control performance. Simulations and experiment results show that the vector control system with the ADRC provides outstanding dynamic response (the speed rise at 0.8% when the load torque is suddenly reduced by 70%) and also gives robust control with parameter variations.