Control of Induction Motors by Using Programmable Logic Controllers (PLC)

Automation is the process of handling various parameters of process like flow, temperature, etc. without presence of responsible person. Where classic control there is difficulty in maintenance therefore, use programmable logic controllers (PLC) to solve these problems. In the development of automation controllers the trend has been to move towards soft controllers so as to provide better control, more flexibility and more reliability with intelligent diagnostics of machine faults and so industries have gradually moved from conventional relay logic control to programmable logic controller (PLC) and three phase squirrel cage induction motors are widely used motors in industry and the implementation of monitoring and control system for the induction motor based on programmable logic controller technology is described. Also the implementation of a hardware and software for speed control and protection with the result obtained from the test on induction motor performance is provided and this idea presents a design and implementation of a monitoring and control system for the three phase induction motor based on programmable logic controller (PLC) technology and the programmable logic controller (PLC) correlates the operational parameters to the speed requested by the user and monitors the system during normal operation and under trip conditions. Thus, programmable logic controller (PLC) proves an effective tool in industrial control of electric drives.