Direct Torque Control of Induction Motor Drives

Abstract: This paper presents improved performance of Direct Torque Control (DTC) of induction motor drives. At the time of switching DTC drive gives the high torque ripple. In DTC induction motor drive there are torque and flux ripples because of incorrect voltage vector selection by VSI states is unable to generate the exact voltage value required to make zero both the torque electromagnetic error and the stator flux error. To overcome this problem a Fuzzy Logic Controller is proposed. The fuzzy logic controller is used to reducing the torque and flux ripples and it improve performance DTC especially at low speed.

Keywords: direct torque control, induction motor, fuzzy logic, torque ripple minimization, fuzzy logic controller.