Comparative study of design of PIDA controller for induction motor

PID controller gives satisfactory results up to second order as it is difficult to get desired response quality in third and higher order systems using analytical approach, as the number of zeros provided by PID controller is less than the order of the plant. PIDA (Proportional-Integral-Derivative-Acceleration) controllers are found to be suitable for third and higher order systems. This paper studies the design of PIDA controller using three different approaches i.e. Dorf Approach, Coefficient Diagram Method and Kitti's Method applied to speed control of 3-phase induction motor.