SPEED SENSORLESS DIRECT TORQUE CONTROL OF INDUCTION MOTOR DRIVE

Document Type : Original Article

Author

Electrical Engineering Department, Faculty of Engineering, Shebin El-kom, Minoufiya University, Egypt.

Abstract

A torque and speed control system for pulse width modulated inverter fed
induction motor without speed sensor is proposed. The system is implemented
by adding a speed calculation algorithm to the direct torque control (DTC)
technique, based on the instantaneous space vector control theory. These control
strategies guarantee very good dynamic and steady state characteristics, with
low sampling time and constant switching frequency. A laboratory control unit
with Digital Signal Processor (DSP) scheme is presented. A simulation and
experimental results are presented and they agree very well.

Keywords