Direct Torque Control Of Induction Motor Using Two-Level Inverter
The direct torque control strategy of squirrel-cage induction motor using two-level inverter is
presented. The strategy used for controlling the torque of induction motor includes the change in applied voltage
to the squirrel-cage induction motor .The variable voltage is provided with the help of look up table to the
inverter. It is observed that the torque ripples are much in two-level inverter. This is because of the high dv/dt
ratio of the output voltage of inverter. The current ripple produces torque ripples in steady state. The
performance of motor in transient state and steady state are shown. The parameters of machine are given and the
controlling strategy is performed using MATLAB/Simulink software. The control strategy is simulated on a 7.5
hp SQIM drive with two-level insulated-gate bipolar transistor (IGBT) inverter in MATLAB/Simulink software.
Index Terms- Direct Torque Control, Space vector modulation, Two-level Inverter.