Direct Torque and Flux control of induction machine using Fuzzy Logic controller

This paper presents implementation of Direct Torque and Flux control of induction machine using modified switching table and Fuzzy Logic Controller. The major concern in DTFC is selection of the switching state vector in order to meet Torque and flux demand of the drive. Major disadvantage of Conventional DTFC is high flux and Torque ripples due to hysteresis controllers and switching table cannot produce accurate voltage vector. Fuzzy logic controller can divide the torque error, flux error and stator flux angle into smaller subsections which results in optimal selection of switching state there by reduction in torque and flux ripples. The proposed methods are evaluated using simulation by Matlab/Simulink.

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