Fuzzy Logic Based Speed Controller for Scalar Controlled Induction Motor Drive

This paper presents a fuzzy logic based speed controller for scalar controlled closed loop Volts/Hz induction motor (IM) drive with slip regulation. The IM is modeled in terms of dq windings, with synchronous frame associated with the frequency ω_s of the stator excitation. The two inputs to the fuzzy logic controller are the linguistic variables of speed error and change of speed error, while the output is the frequency change. They are also compared with traditional PI controller and without controller. The results validate the effectiveness of the proposed fuzzy logic controller for scalar controlled (or) Volts/Hz induction motor (IM) drive which considered as highly non linear dynamic complex systems. Matlab/simulink software was used to simulate the proposed model.