comparison between linear and nonlinear control strategies for induction motor

Document Type : Original Article


Electrical Engineering Department, Faculty Of Engineering,Mansoura University


This paper presents a comparison of two different control strategies for Squirrel-Cage Induction
Motor (IM): conventional Proportional-Integral (PI) controller and modern Sliding Mode
Controller (SMC). Two control laws are proposed to control speed and rotor flux independently.
Convergence analysis of the SMC, based on Lyapunov theory, proved. Both strategies are
investigated and simulated using MATLAB/Simulink under nominal case. Moreover, the
robustness of both methods with respect to the parameters uncertainties is verified by significant
simulation results.
The study shows that nonlinear control strategy based Sliding mode technique possesses not only
high-performance dynamic characteristics, but also robustness with respect to parameter variations
and external load disturbances compared to PI controller.