Speed Control of Three Phase Induction Motor usingVariable Frequency Drive

Abstract

Induction motors do not run at synchronous speed; they are generally fixed speed motors. In industries mechanical loads should not only be driven but should also be driven at desired speed. Therefore, the need of speed control methods for induction motor arises. There are various methods of speed control for an induction motor. In this project reviews on different speed control methods and their performance based on SPWM inverter, harmonics reduction and speedtorque characteristics so as to analyse the most effective techniques among them considering the presence of harmonics. Thus due to the importance of speed control using VFD drive, that used scalar V/F as most common technique, this method was studied and investigated both in simulation and on the field of the industry (Green Food Processing Industry).