To Control and Monitor Variable Frequency Drives Using PLC for Various Applications

The induction motor in industries as well as in residential purposes plays an important role due to its low cost and simplicity for automated Control of industry. Many industries now also uses HMI to monitor the speed of the motor. Due to this system, all motor parameters are not monitored properly and continuous monitoring is not done. The speed of the motor is controlled by varying the frequency through triggering the VFD i.e. PWM technique. Thus it causes the output voltage of the VFD according to its turn on time. The inverter converts DC power to AC power at the required frequency and amplitude. By this the variable frequency is set by VFD and the motor speed can be changed to the required speed. The entire control system is switched by using PLC. Thus the main Aim of this paper is the monitoring, speed control of motor based on VFD and programmable logic controller, and SCADA system is developed which shows the parameters of IM on the GUI Application Software.