Speed Control of Induction Motor Using Fuzzy Logic Controller Using Dspic30f2010

This paper presents hardware development of closed loop scalar speed control of three-phase induction motor. A Fuzzy logic controller with two inputs and one output is used in controller. Speed of the motor is adjusted by Fuzzy logic controller (FLC) with the help of predefined rules for input and output of fuzzy controller. Two inputs to the FLC are error and change in error. Its output is frequency of AC input of the motor. The frequency is determined from rules of the FLC under different conditions. The control strategy keeps Voltage- Frequency ratio of induction motor constant. Three phase induction motor is fed by PWM based inverter. The speed control system for 3-phase induction motor is implemented in dsPIC micro-controller. The performance analysis of this closed loop speed control system is carried out. It is found that the motor speed can be kept constant when load is varied. Keywordsâ€” Fuzzy Logic Controller (FLC), Induction Motor, MATLAB/Simulink, Scalar Speed Control, V/f Control.