AIM OF THE PROJECT:
The aim of the project is to generate a PWM signal using which we trigger the IGBT gates of an inverter which feeds the necessary supply to the motor. Thus the speed control is planned to be achieved. Space vector modulation is the technique that is evolved to generate this PWM signal. The controller thus evolved has greater efficiency and precision compared to the conventional methods adopted for the speed control of 3 phase Induction motors.

SCOPE OF THE PROJECT:

In recent years, so-called sensorless control scheme for AC drives has been one of the most popular research topics in this area. For direct control of AC motors, information about its rotational speed (or rotational position) is crucial and in general shaft-mounted tacho-generators and resolvers are used to measure them. The elimination of those transducers has long been an attractive prospect, since the shaft transducers and the associated signal wiring are a significant source of failure, additional cost, and additional weight. This project presents the mathematical principles and algorithm underlying a new sensorless control strategy for a three phase squirrel cage induction motor.