新型Anti-Windup PI控制器在感应电机DTC系统中的应用

The New Anti- Windup PI Controller in the Application of the Induction Motor DTC System

感应电机直接转矩控制系统(DTC)的转速调节通常采用传统的PI控制器,但传统PI控制器存在非线性的饱和特性,会使实际系统的控制性能下降。为提高系统控制性能,采用了一种新型抗积分饱和(Anti-Windup)PI控制器,新型Anti-Windup PI控制器在出现积分饱和时,可以快速地退出饱和区,从而实现了减小超调量,加快响应速度的目的。随后对系统的稳定性进行了分析,给出了系统的稳定条件。最后用MATLAB仿真软件对系统进行了建模和仿真,并和传统PI控制器和反计算控制器进行了比较,结果表明新型Anti-Windup PI控制器可以有效抑制积分饱和现象,缩短响应时间,性能优于传统PI控制器和反计算控制器。

Induction motor direct torque control （DTC） system of speed adjusting usually adopt the traditional PI controller, but the traditional PI controller is nonlinear saturation characteristic, and can make the control of actual system performance degradation. In order to improve system control performance, a new type anti saturation （ anti-windup） PI controller was adopted. The anti windup PI controller can quickly exit the saturated zone, so as to realize the reduce the over-shoot, faster response speed. The stability of the system was analyzed, and the conditions for the robust stability of the system was given. Finally MATLAB simulation software was used to the system modeling and simulation, and the anti windup PI controller was compared with the traditional PI controller and tracking-back calculation controller. The results show that the new saturation PI controller can effectively restrain the integral saturation phenomenon and shorten the response time, better performance than the traditional PI controller and the tracking-back calculation controller.