Recent advancement of AC–DC SEPIC converter: a state–of–the–art review on topologies, technical aspects and applications

Power Factor Correction (PFC) ac–dc converters play a vital role in numerous power electronics applications as they can enhance power quality and achieve high levels of efficiency. The Single–Ended Primary–Inductor Converter (SEPIC) has emerged as a pivotal topology in the domain of PFC converters as it facilitates efficient power conversion in various industrial and domestic loads. However, despite its significance, a comprehensive review specifically focusing on the technical merit of its state–of–the–art topologies remains conspicuously absent in the literature. This paper endeavors to fill this gap by presenting a detailed synthesis of recent ac–dc SEPIC converters encompassing their classifications, performance characteristics, and applications. The working principles of the SEPIC converter with different control modes are provided in detail, and a classification section is introduced for the nominated converters according to the operating modes. The classification of ac–dc SEPIC converters based on the type of rectification, isolation, number of phases, and power levels are also demonstrated lucidly. A detailed chart of different topologies include information on topological structure, isolation, rated power, component counts, control and operating mode, conversion efficiency, input Power Factor (PF), and Total Harmonic Distortion (THD). The key design challenges and approximate cost estimation associated with semiconductor components are illustrated for various SEPIC converters. This study may serve as a valuable resource for researchers and manufacturers, providing insights, and fostering further advancements in the ever–evolving domain of power electronic converters.