Superior Asymmetrical PWM AC Chopper Fed Capacitor Run Induction Motor Drive using Evaporation Based Water Cycle Algorithm

Abstract

Introduction: This research presents a novel improved asymmetric pulse width modulation technique for increasing the efficiency of a capacitor-powered, pulse width modulated (PWM) AC chopper-supplied induction motor. It uses a water cycle optimization technique based on evaporation and incorporates 4 distinct pulses in each quarter cycle. It is compared with the standard method of sinusoidal pulse-width modulation. Power quality is defined by properties such as input power factor, efficiency, and total harmonic dispersion of voltage and current. Simulation results yields better response for the proposed method when compared with the conventional technique.

Objectives: The goal of the study is to minimize total harmonic distortion of voltage and total harmonic distortion of current while optimizing power factor and efficiency in order to improve power quality metrics. This paper focuses on obtaining the optimal switching angles by an evaporation-based water cycle algorithm.

Methods: The pulses in the enhanced asymmetrical pulse width modulation approach have varying widths while maintaining quarter cycle symmetry. The switching on angles and switching off angles is varied. The proposed enhanced asymmetrical pulse width modulation by evaporation-based water cycle algorithm and conventional sinusoidal pulse width modulation technique is compared.

Results: The simulation results show that performance parameters by proposed technique is better compared to conventional technique. The controlling techniques implemented for PWM AC chopper are sinusoidal pulse width modulation and enhanced asymmetrical pulse width modulation by evaporation based water cycle optimization algorithm.

Conclusions: This paper discusses novel optimization algorithm for the speed control of capacitor run induction motor with improved parameters. The performance enhancement parameters taken into account total harmonic distortion of current, total harmonic distortion of voltage, efficiency and power factor. This work can be compared with the other techniques like particle swarm optimization, cuckoo search optimization and proposed technique for the enhanced asymmetrical pulse width modulation for capacitor run induction motor.