Direct torque control of induction motor ppt

The main aim of direct torque control strategies is to effectively control the torque and flux of induction motor. Department of Energy Conversion,. Faculty of Electrical Engineering,.

IM is superior to DC machine with respect to size, weight, inertia, cost, speed. DC motor is superior to IM with respect to ease of control.

There are many different ways to drive an induction motor.

Decoupled control of torque and flux.

DIRECT TORQUE CONTROL FOR INDUCTION. Absence of mechanical transducers. Current regulator, PWM pulse generation, PI control of flux and torque and co-ordinate transformation are not required.

Torque Control ( DTC) problem of three-phase induction motor drives. Specifically, by observing that the . Step response of speed control (without tachometer) DTC measurements.

Direct torque control (DTC) is one of the most excellent control strategies of torque control in induction motor. The aim is to control effectively the torque and flux. In this project we propose an approach to improve the direct torque control (DTC) of an induction motor (IM).

The proposed DTC is based on fuzzy logic techni. Lecture series on Power Electronics by Prof. Gopakumar, Centre for Electronics Design and Technology, IISc Bangalore. Induction motors are currently used in many industrial applications.

An efficient method of induction motor control is the direct torque control.

The method directly controls motor torque instead of trying to control the currents analogously to DC drives. This means better accuracy in matching the load requirements . This technique increases the number of voltage vectors beyond the available eight discrete voltage vectors without any increase in the number . A triangular wave is used as dither signal of minute amplitude (for torque hysteresis band and flux hysteresis band respectively) in the error block. This method minimizes flux and torque ripple in . Warsaw University of Technology.

Institute of Control and Industrial Electronics. Space Vector Modulated – Direct. Inverter – Fed Induction Motor Drive. Evolution of direct torque control. AC drives, frequency control, PWM.