Power Factor Improvement and Harmonics Reduction in PWM AC Chopper Fed Three-Phase Induction Motor Drive Using Fuzzy Logic Controller

Induction motors are widely employed in industries due to their numerous advantages like robustness, less cost, less maintenance and the fact that they can perform even in polluted environment. However, they have the main drawback of characteristic low power quality. This paper suggests using fuzzy logic controller to improve the power factor and reduce harmonics of AC chopper fed three-phase Induction motor. The control circuit generates PWM signals which are used to drive the gates of IGBTs of the AC chopper.