Experimental comparison of different anti-windup schemes for an AC motor speed control system

Anti-windup compensator is an additional controller which is used to compensate the affect of saturation non-linearity often present in practical systems. This paper describes the system identification, uncertainty modeling, control and implementation of different anti-windup techniques for a computer interfaced AC motor speed control system. System identification is done using pseudo random number technique. A robustly stable PI-controller is designed and implemented in order to control the AC motor speed. Wind-up affect due to actuator saturation is removed by implementing different schemes like Internal Model Control (IMC), full order, low order and static anti-windup compensator and practical results are compared.