Application of Fuzzy Logic in the Phase-Locked Loop Speed Control of Induction Motor Drive

A phase-locked loop induction motor speed drive incorporating a fuzzy logic controller is presented. The proposed system combines the excellent speed regulation of the phaselocked loop techniques and the advantages of fuzzy logic (intuitiveness, simplicity, easy implementation, and minimal knowledge of system dynamics) to obtain a robust, fast, and precise control of induction motor speed. An experimental system is implemented to evaluate the performance of the proposed system. The experimental results show that the combination of a fuzzy logic controller and the phase-locked loop in induction motor drive can achieve precise speed control with fast response.