Simplified self-tuning Fuzzy Logic Speed controller for induction motor drive

This paper presents the simplified self tuning Fuzzy Logic Speed Controller (FLSC) with output scaling factor tuner for Induction Motor Drive. In general, self tuning mechanism is able to improve the drive performance. However, implementing fuzzy self-tuning mechanism will increase the complexity of the control algorithm. The number of rules will significantly affect the computation time and memory space requirement. Thus, this paper proposes a simplified rules for the self-tuning (ST) FLSC. The proposed system controller consists of ST-FLSC with less number of rules. The drive system utilizes the indirect Field Oriented Control (FOC) fed by Space Vector Pulse Width Modulation method. The ST-FLSC is compared with the constant parameter (CP)-FLSC. The simulation results indicate the improvement in term of rise time and settling time at low, medium and high speed operation as well as during load disturbance. With less number of rules, the complexity of the controller algorithm is minimized and will provide a great advantage for the hardware implementation.