Single-Phase Enhanced Gain Converters with Boost DC and AC Outputs

Abstract

Depleting fossil fuel reserves, escalating energy demands, and escalating climate change concerns stemming from CO2 emissions have driven the widespread adoption of renewable energy sources. However, powering electronics, variable speed drives, and LED loads using renewable sources often entails multiple AC-DC and DC-AC conversions, leading to substantial energy losses in transit. Addressing this issue, this paper introduces a single-phase enhanced gain converter with simultaneous boost DC and AC outputs. Operating in a single stage, this architecture minimizes losses, boosts power density, and enhances overall efficiency. The converters, sharing a common ground, eliminate grounding issues. Moreover, they can cater to multiple loads demands concurrently, finding applications in battery charging, uninterrupted power supply, and integration into hybrid microgrids. The paper provides a comprehensive analysis of the converter's design, operation, and mathematical modeling under steady-state conditions. Validation comes from a 162 W laboratory prototype, confirming the theoretical predictions and showcasing the performance of the proposed converters. © 2024 IEEE.