THREE PHASE INDUCTION MOTOR PROTECTION USING EMBEDDED TECHNOLOGY

Three phase induction motors are extensively used for industrial applications consequently making its smooth operation and long life very imperative. The objective of this paper is to enhance the 3-phase induction motor protection systems using 16F87 Peripheral Interface Microcontrollers. To ensure protection against motor faults, this paper will comprise of fault analysis using fuzzy logic controller in MATLAB, use of embedded systems in hardware to protect against faults. The various faults affiliated with the induction motor are unbalanced supply voltage, over current, single phasing, under voltage, current faults, over voltage ,ground faults and this paper comprehends detection and clearing of these. Fuzzy logic controller rule base system classifies each type of fault detected on the basis of observed parameters and hence is more effective in fault identification. Fuzzy logic controller 'mamdani' system type classifies each type of fault based on observed inputs and hence is more effective in fault identification. They are able to segregate faults in much lesser time compared to other controllers. Hardware involves use of PIC micro controller and Atmega32 to make decisions on how to clear different types of faults. The efficiency of this system is higher and is robust in construction.