| Abstract |
In variable speed domain, many applications need high performances in term of torque and accuracy.
To obtain high performances, several control methods have been developed few years ago. The
variable structures of control methods were developed principally in Russia since 1950. Sliding mode
theory has been used for Induction Motor (I.M) drive for a long time [1]. Introduce as a relative easier
control design, sliding mode using switched control produces chattering phenomena and torque
perturbations. Also, many solutions try to limit those drawbacks by using smoothed nonlinearities.
In an other hand, many methods of non linear system control have been developed like linearization,
backstepping [2] , [3]. This paper shows the utilization of sliding mode theory, well known by speed
drive conceptors, in order to linearize the I.M behavior. Continuous feedbacks are designed to limit
the chattering problem and a model based approach is used to impose motor state trajectories in
despite of parameter variations. |
