A Non-isolated Bidirectional Buck-Boost DC-DC Converter with Minimum Component Count

Abstract

This paper presents a novel non-isolated high gain DC-DC converter designed to perform bidirectional buck boost operations in both the power flow directions efficiently. The converter is engineered with an emphasis on simplicity, utilizing a minimal number of components. Its standout feature lies in its broad duty ratio range, enhancing adaptability to meet the specific demands of renewable energy sources and electric vehicle applications. Noteworthy for its straightforward control and design characteristics, the proposed topology employs small signal analysis and the K-factor method for controller design. To rigorously validate the performance, open-loop and closed loop simulations of the proposed converter are conducted using MATLAB Simulink, considering a power level of 300 watts. This comprehensive examination ensures a thorough understanding of the converter's behavior and effectiveness in various operational scenarios. © 2024 IEEE.