07-11-2014, 10:20 AM
Abstracts: OUR PROJECT PRESENTS A DESIGN AND IMPLEMENTATION OF A THREE-PHASE INDUCTION MOTOR MONITORING, CONTROL AND PROTECTION SYSTEM USING VARIABLE FREQUENCY DRIVE (VFD) AND PROGRAMMABLE LOGIC CONTROLLER (PLC) TECHNOLOGY. ALSO, THE IMPLEMENTATION OF HARDWARE AND SOFTWARE (LADDER LOGIC) FOR SPEED CONTROL AND PROTECTION OF INDUCTION MOTOR IS PROVIDED. WE ARE USING A PROGRAMMABLE LOGIC CONTROLLER WHICH CAN BE PROGRAMMED AS PER OUR REQUIREMENT. WE HAVE DESIGNED A CONTROL PANEL AND PROGRAMMED THE PLC ACCORDING TO OUR REQUIREMENTS. THE PLC CORRELATES THE OPERATIONAL PARAMETERS TO THE SPEED REQUESTED BY THE USER AND MONITORS THE SYSTEM DURING NORMAL OPERATION AND UNDER TRIP CONDITIONS. THE INDUCTION MOTOR DRIVEN BY VFD AND CONTROLLED BY PLC PROVES A HIGHER ACCURACY IN SPEED REGULATION AS COMPARED TO A CONVENTIONAL V/F CONTROL SYSTEM. THE EFFICIENCY OF PLC CONTROL IS INCREASED AT HIGH SPEEDS. THUS, PLC PROVES THEMSELVES AS A VERY VERSATILE AND EFFECTIVE TOOL IN INDUSTRIAL CONTROL OF ELECTRIC DRIVES