Field-oriented control using sliding mode linearization technique for induction motor

Abstract

In the following paper, we propose a new input-output sliding mode linearization control for induction motor combined with field oriented control (FOC). We develop two loops to control the speed and rotor flux modulus. The first one, inner loop, allows to linearize the system by a choose of closed loop poles to achieve a good linearization. The choice of a particular sliding surface permits to create a link between sliding mode theory and input- output linearization. The second loop, an outer one, allows to modifying the dynamics obtained by the first one using PI controller to guarantee stability and tracking performance of speed and rotor flux modulus. When the rotor flux cannot be measured, a nonlinear sliding mode observer is introduced to estimate the rotor flux. The effectiveness of this new approach has been successfully verified through computer simulations