ADAPTIVE VPWM CONTROL FOR HIGH PERFORMANCE MULTILEVEL INVERTER DRIVEN INDUCTION MOTOR SYSTEM

Abstract

This paper presents an adaptive Voltage Pulse Width Modulation (VPWM) control technique for a multilevel inverter-fed induction motor drive system. The proposed method enhances motor performance by dynamically adjusting the switching pulses according to load variations and operating conditions. Multilevel inverters are used to reduce harmonic distortion and improve the quality of the output voltage supplied to the induction motor. The adaptive VPWM technique provides efficient operation, improved speed control, reduced switching losses, and better motor performance under different load conditions. The proposed control strategy is implemented and evaluated through simulation to study the voltage, current, speed, torque, and harmonic characteristics of the drive system. Simulation results demonstrate that the proposed technique provides lower Total Harmonic Distortion (THD) and improved system stability compared with conventional PWM methods. The motor also shows a smoother speed response and better torque characteristics during changes in load. The adaptive switching approach helps to avoid unnecessary switching actions and improves the overall utilization of the multilevel inverter. The obtained results confirm that the proposed VPWM technique can effectively maintain stable motor operation during sudden load changes and varying operating conditions. Overall, the proposed method provides improved power quality, speed regulation, efficiency, and reliability of the induction motor drive system. The results indicate that the adaptive VPWM technique is a suitable and effective control method for practical multilevel inverter-fed induction motor drive applications.