ANALYSIS AND COMPARISON OF DTC TECHNIQUE IN 2 LEVEL & 3 LEVEL INVERTER FED INDUCTION MOTOR DRIVE
3L-NPC MLI, Induction motor, hysteresis band controller, torque ripple.
Two level inverter fed technique has dynamic performances but very large amount of torque ripple is appears. To reduce torque ripple higher level of inverter is used which has large number of voltage vector which is helps to reduce torque ripple. Three level diode clamped inverter is used. In order to develop high dynamic characteristics, direct torque control technique is applied. Squirrel cage induction motor is used as ac motor drive which is widely used in industrial applications. Multilevel inverter also used to reduce THD in current and common mode voltage can be minimized. The simulation results carried out by using MATLAB/ Simulink