Speed control in vector controlled induction motors

The field orientation control of an induction motor has been permitted fast transient response by decoupled torque and flux. The conventional PI controller has been widely used in industrial application due to the simple control algorithm and easy implementation. With help of the Matlab/Simulink, block model of an induction motor drives can be constructed. This paper presents a novel fuzzy controller and POSICAST controller of an indirect field oriented induction motor drive for high performance. A superiority of the proposed fuzzy and POSICAST controller over conventional PI controller in handling nonlinear such as an induction motor has been effectively demonstrated by comparing speed controller with conventional PI controller under varying operating conditions like step change in speed reference and torque reference. The results validate the robustness and effectiveness of the fuzzy logic controller and POSICAST controller for high performance of induction motor drive system.