High‐Gain Fault‐Tolerant Multiport Bidirectional DC–DC Converter With Time Multiplexing Control

ABSTRACT In low‐power multiple‐voltage applications, single‐input, multiple‐output nonisolated converters are becoming popular as alternative dc‐dc topologies to increase efficiency and reduce the size and cost of the converter. This article presents a novel high‐gain fault‐tolerant multiport (HGFTM) dc‐dc converter for low‐ and medium‐voltage applications. The proposed converter is a combination of conventional boost and buck converter topologies with time multiplexing control. The switched boost action divides power into two ports using time multiplexing control. The noncascading structure of the converter provides high gain with improved efficiency. The proposed converter provides open circuit switch fault (OCSF) tolerant capability without any additional device requirement. This provides controlled output voltages for a wide range of applications. The main objective of this research is to attain robust and fault‐tolerant operations in multiport converter systems, ensuring continued power delivery even under component failure. A closed‐loop control technique is implemented to control the output voltages and assure the system's stability and accuracy under different load conditions. The physical implementation of the converter is tested in various scenarios to ensure its real‐time application. The experimental findings closely match the simulation results, showing the effectiveness of the proposed fault‐tolerant multiport dc‐dc converter.