无解耦器的定子磁场定向矢量控制系统

为克服感应电机按定子磁场定向矢量控制解耦器带来的不便,提出一种不需解耦器的定子磁场定向控制方法.采用扩张状态观测器对磁链与转矩电流间耦合进行观测和补偿,结合自抗扰控制器进行磁链环的控制,同时将自抗扰控制器引入转速环,并进行了数字仿真和实物实验.结果表明,采用该方案取消了解耦器,简化了系统结构,降低了系统设计难度,并实现了定子圆形磁链的控制.不同转速下系统都具有快速动态响应和高稳态精度.

Stator Flux Oriented Induction Motor Vector Control System Without Decoupler

Stator flux oriented induction motor not only has its continuous control,but also is robust to stator parameters.However,as its torque can not decouple the flux,a decoupler is needed thus adding to the complexity of the system.To settle the coupling problem in flux orientation,it is suggested that a stator flux orientation control mode without decoupler and an extended state observer(ESO) is adopted to compensate the coupled part.Active disturbance rejection controller (ADRC) is used to control the flux loop and speed loop.Simulation and experiment verified the feasibility of the given scheme.It achieves stator circle flux control and the speed adjusting system has fine dynamic and static performances.