Stator flux optimization on direct torque control with fuzzy logic

摘要

The Direct Torque Control (DTC) is well known as an effective controltechnique for high performance drives in a wide variety of industrialapplications and conventional DTC technique uses two constant reference value:torque and stator flux. In this paper, fuzzy logic based stator fluxoptimization technique for DTC drives that has been proposed. The proposedfuzzy logic based stator flux optimizer self-regulates the stator fluxreference using induction motor load situation without need of any motorparameters. Simulation studies have been carried out with Matlab/Simulink tocompare the proposed system behaviors at vary load conditions. Simulationresults show that the performance of the proposed DTC technique has beenimproved and especially at low-load conditions torque ripple are greatlyreduced with respect to the conventional DTC.