13-07-2012, 01:40 PM
DIRECT TORQUE CONTOL OF AN INDUCTION MOTOR
DIRECT TORQUE CONTOL.pptx (Size: 127.67 KB / Downloads: 35)
Induction motor torque control
frequency & magnitude of voltage, current, flux CONTROL
Vector control methods
instantaneous position of voltage, current and flux
Direct torque control
Direct torque control (DTC) is one method used in variable frequency drives to control the torque (and thus finally the speed) of three-phase ac electric motors.
This involves calculating an estimate of the motor's magnetic flux and torque based on the measured voltage and current of the motor.
conclusion
Direct torque control for induction motor using two sets of three-phase inverters has been presented
The control scheme is quite different from field oriented control because it depends on the concept of the slip frequency control in the spite of the magnetic force