A NEW BOOST REGULATOR BASED INDUCTION MOTOR DRIVE

Simplicity and ruggedness of Induction motor makes it suitable for many applications. There is wide range of machine easily available. The control and estimation of ac drives is more complex than those of dc drives. Almost all the types of ac drive require variable frequency for speed control. The timely varying inductances make this drive more complex for close loop control. So there is a need of harmonically filtered converter power supplies for the better operation of these drives. In the PWM Inverter fed Induction motor drives the current drawn by power semi converter devices from the line is distorted in nature.Distorted nature of current gives rise to high value of Total Harmonic Distortion (THD) and low Power Factor (PF). So there is a continuous need for power factor improvement and reduction of line current harmonics. This paper aims to study the single switch boost converter approach to minimize the Total Harmonic Distortion for an Inverter drive.