Input-Output Linearization of an Induction Motor Using MRAS Observer

This paper presents the non-linear control of an induction motor (IM). The objective of nonlinear control is to can control separately flux and the speed, several techniques of control are used for (IM), The technique of control oriented flux (FOC) whichpermits the decoupling between input and output variables, so (IM) is assimilate to continuous current motor , this method has a problem is how exactly oriented the axis d on the flux .However, feedback linearization amounts to cancelling the nonlinearities in a nonlinear system so that the closed- loop (CL) dynamics is in a linear form . A goal of feedback linearizationis to can controlled separately flux and the speed ,the motor model is strongly nonlinear then it’s composed to the autonomous and mono-variables too under systems so every under system presented an independence loop of control for each variables is given . We proposed the MRAS (system adaptive reference model) for speed and rotor fluxobserver.