Design and Analysis of a Single-Phase Full-Wave Inverter with Constant V/f Control for Induction Motor Speed Regulation

Abstract

Induction motors, especially three-phase types, are widely used in industrial and marine applications for their ability to operate near synchronous speed. Motor speed is primarily influenced by load torque, with only slight variations as the torque increases, making them ideal for systems requiring constant speed. This study focuses on designing a single-phase full-wave inverter with constant voltage-to-frequency (V/f) control for regulating induction motor speed. The goal is to develop an efficient method to adjust motor speed while maintaining optimal performance. The methodology involves systematic data collection, processing, and analysis. The inverter design allows precise speed control through V/f regulation, enabling flexible operation under varying load conditions. Experimental results show an average constant V/f ratio of 2.34, with the inverter producing a square wave output, typical of simple inverter designs. Analysis of the relationship between input frequency and motor speed reveals a proportional increase in motor speed with higher input frequency. This finding highlights the significance of frequency control in motor speed regulation. The study contributes to the development of more efficient and cost-effective speed control systems for induction motors, particularly in marine propulsion and industrial drive applications. Further improvements to the inverter design could enhance waveform quality and overall system efficiency, addressing limitations in simple inverter configurations.