Variable Frequency Drive based Speed Control 3-Phase Induction Motor using PLC

Three phase induction motors are frequently used AC motors in industry for various operations. In electrical machine technology there are different types of motor available and one has to choose the proper motor type depending on the requirements and applications. However, the most widely used and more efficient motor available of all is the Induction Motors. Hence, control the speed of induction motor many techniques and drives are available out of which variable frequency drive is used here. The employment of variable frequency drive will increase potency, reliability, energy savings and supply speed variation. It initiates a need to control various parameters of induction motor in order to run it properly and efficiently. Each motor require individual variable frequency drive for speed control, so to overcome this we report here to control number of variable frequency drives through a single PLC from the control room itself, and hence the motor speed can be controlled.