Design and Development of PLC and SCADA based Control Panel for Continuous Monitoring of 3-Phase Induction Motor

Abstract

Three phase squirrel cage induction motors are widely used motors in industry because of its rugged construction and negligible maintenance.To operate this kind of this motor star-delta starters are used .But ,because of its constant speed characteristics, many a times it is driven with the help of variable frequency drives.To have reliable operation its performance must be monitored continuosly. Design and fabrication of a monitoring and control system for 3-phase induction motor based on Programmable Logic Controller technology. 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.The PLC corelates the operational parameters to the speed requested by the user and monitor the system during normal operational and under the trip conditions.Other performance parameters of three phase induction motors can also be monitored by the other control devices.Variable Frequency Drives (VFD) can also used to control the motor rotation direction and rotation speed of the three phase induction motor.All the required control and motor performance data will be taken to a personal computer via PLC for further analysis.Speed control from control side and protection from performance side will be priority. Index Terms-Computer-controlled systems, computerized monitoring, electric drives, induction motors, programmable logic controllers (PLCs), variable frequency drives, voltage control, SCADA (Citect Software)