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Modeling and Performance Analysis of Fuzzy Logic Controller Based Direct Torque Control of VLSI Fed Three

S.Prabahaaran, P.RameshBabu, N.Vijayasarathi

This manuscript deals with fuzzy logic controller based Direct Torque Control (DTC) of three phase Induction Motor Drive using MATLAB and its toolbox SIMULINK. The Direct Torque Control of VSI fed Induction Motor is implemented with the help of Hysteresis Band (HB) controllers (one for flux control and other for torque control), a voltage source inverter and a switching table. The major problem that is usually associated with DTC drive is torque ripple. To overcome the problem direct torque control method has been optimized by using fuzzy logic controller. The presented fuzzy based control scheme combines the benefits of fuzzy logic control technique along with direct torque control technique. With aid of the developed model, the steady and transient-state characteristics of current, speed and torque of three phase induction motor can be effectively examined and analyzed.