Fuzzy logic based speed control of an induction motor with considering core loss, stray load loss, and variations of motor parameters

Most of the controllers of Induction Motors (IM) for industrial applications have been designed based on PI controller without consideration of core loss (CL) and stray load loss (SLL). In order to obtain precise performances of torque as well as rotor speed and flux, the mentioned losses should be considered. The overshoot problems are the common phenomena occurred in conventional PI based controller. Also the performance is degraded under the variations of motor parameters such as rotor resistance, moment of inertia, etc. To overcome the above mentioned drawbacks of PI based speed controller, in this paper a fuzzy logic based speed controller is proposed. Fuzzy Logic Controller (FLC) is a perfect choice for smooth operation of IM during transient condition and during the variations of motor parameters. The effectiveness of the proposed control scheme is verified by simulation analysis using MATLAB/SIMULINK. The simulation analysis shows the proposed FLC performs well and gives satisfactory results under the variations of rotor speed, load torque, rotor resistance, and moment of inertia compared to conventional PI based speed control strategy.