Mandal, S.Prabhakaran, P.2026-02-0620232023 IEEE IAS Global Conference on Emerging Technologies, GlobConET 2023, 2023, Vol., , p. -https://doi.org/10.1109/GlobConET56651.2023.10150151https://idr.nitk.ac.in/handle/123456789/29501The paper proposes a novel transformer-less bidirectional DC-DC converter that achieves ultra-high gain and reduces voltage stress across components. This converter is based on modified SEPIC and CUK topologies, and its derivation, operating principle, and steady-state analysis are presented. The paper also includes dynamic modeling of the converter and the design of closed-loop controllers for voltage and current control modes. Detailed analysis and simulation results are provided to demonstrate the efficacy and performance of the proposed topology. Overall, this innovative converter offers a promising solution for high-efficiency energy transfer with ultra-high voltage gain in various applications. © 2023 IEEE.Bidirectional DC-DC convertersDynamic modellingmodified SEPIC-Cuk converternon-isolatedultrahigh voltage gain