FLC Based Closed Loop Control of MLI Fed Induction Motor Drive

Numerous industrial and practical applications of single phase induction motors are extensively used owing to cost effective, reliable and deficient maintenance. It is necessary to maximize the efficiency of induction motor. The destitute quality of voltage and current obtained from conventional inverter fed induction motor, since there is the existence of harmonics which raises harmonic losses and reduces efficiency. Hence multilevel inverter fed induction motor is used to reduce losses. Efficiency is increased by governing the speed of the motor and also by improving the power factor. So it needs proper control of the speed and power factor. In the proposed system multilevel inverter is fed to induction motor using fuzzy logic controller. The drive system has several merits like reduction in losses, steady state error, more reliability and also the power factor can be improved by necessary boost converter. The simulation and experimental results for the proposed system are verified and compared.