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.
Keywords— Fuzzy Logic Controller (FLC), Induction Motor, MATLAB/Simulink, Scalar Speed Control, V/f Control.