Nonlinear Control for Induction motor and comparison with vector control techniques

Abstract

Induction motor is a complex nonlinear structure where strong coupling exists between rotor flux and produced electromagnetic torque.So, different decoupling techniques are applied to decouple the system which make the control design easy.Moreover, the proposed model of the motor has nonlinearities and parametric uncertainties which make control more difficult.In the thesis Multi-scalar variable model is used to decouple the complex motor structure,which transform the system in two subsystems namely mechanical and electromagnetic.As the presented system is nonlinear so a nonlinear control scheme is better choice to control such system.In this research work Backstepping controller of the system is proposed which gives better performance than conventional techniques. All the simulations are done in the MATLAB/SIMULINK. For mathematical analysis Laypunov theory is used to prove the stability of the proposed control.Comparison of proposed controller and conventional control techniques from literature is also done to show the robustness of controller.