DELAYED FEEDBACK CONTROL OF NONLINEAR PHENOMENA IN INDIRECT FIELD ORIENTED CONTROL OF INDUCTION MOTOR

Subhankar Dam, Abhrajit Saha, Goutam Kumar Panda

Abstract: The Indirect Field Oriented Controlled (IFOC) Induction Motor often shows the nonlinearity in time domain response of its speed and current due to the instability of the periodic orbits. The system undergoes Hopf bifurcation which is essentially caused by the unstable equilibrium points. In this work our aim is directed towards the stabilization of the unstable periodic orbits (UPOs) by continuously perturbing the system by a time delayed version of any state variable in a feedback form. The clarification of controlling the system from any periodic even chaotic mode to any stable periodic mode is presented by both numerical analysis and software simulation.

Keywords: IFOC-IM, Hopf Bifurcation, Time Delayed Feedback Control, Control of Nonlinear Dynamics.

DOI: https://doi.org/10.15623/ijret.2012.0104013