Boost Inverter Based Variable Frequency Drive for Induction Motor

Abstract

The fast expansion of renewable energy sources, including solar systems, fuel cells, and wind turbines, necessitates the development of efficient power conversion technology to manage their fluctuating voltage profiles.To overcome the limitations involve in two stage and single stage inverter base induction motor drives, This study introduces the Coupled Inductor Diode Assisted Boost Inverter (CL-DABI) architecture for induction motor drive, which overcomes the constraints of conventional two-stage and single-stage boost inverter complex configurations and control. In contrast to traditional designs that typically utilize large number of active and passive components and complex control strategies to extract maximum advantages but use of large number of components make hardware bulky also costly some of these topologies like Z-Source Inverter and Active Switch Boost inverter topologies are shoot through topologies require to change inductor for boost functionality. The CL-DABI architecture provides a single-stage boost functionality with a reduced number of switches and non-shoot-through inductor charging functionality. But due to use of passive components in circuit for boost functionality the inverter demands inrush starting current from source specially when this inverter supplies to inductive load. The research presents improved modulation techniques, namely Soft Starting Pulse Width Modulation (SS-SPWM) and Soft Starting Extended Sinusoidal Pulse Width Modulation (SSESPWM). These strategies aim to reduce inrush currents during initiation also provides low total harmonic distortion (THD). The experimental results demonstrate a substantial decrease in beginning current—by as much as 40% and 50% respectively—along with improved overall system performance. The hardware implementation of the CL-DABI effectively showcases superior gain performance, establishing it as a reliable option for efficient power conversion. This research highlights the advantages of the CL-DABI topology compared to existing inverter designs and its potential to enhance power conversion systems in renewable energy applications.