A non-isolated buck-boost converter based on SEPIC topology for renewable energy applications

IF 4 3区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Computers & Electrical Engineering Pub Date : 2025-04-16 DOI:10.1016/j.compeleceng.2025.110325

Priyanshu Kumar, Moina Ajmeri

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Abstract

In this manuscript, a novel non-isolated buck-boost converter topology based on SEPIC converter and switched capacitor circuit is proposed to meet the demand for high voltage gain in renewable energy applications. The operation of the proposed converter is investigated using a single-duty ratio in continuous conduction mode. Voltage gain of the proposed converter is found to be double of the conventional SEPIC’s gain. Additionally, the voltage stresses on the switches and diodes of the proposed circuit are lower than or comparable to other related existing converters. Further to prove the circuit’s feasibility, the performance of the proposed circuit is examined both in the boost and buck modes under the dynamic changes in duty ratios and load resistances. A prototype of the developed converter with a power rating of 200 W is designed and tested in the laboratory. With the proposed converter a maximum theoretical efficiency of 93.46% and the maximum experimental efficiency of approximately 91.81% are obtained.

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可再生能源应用中基于SEPIC拓扑的非隔离降压变换器

本文提出了一种基于SEPIC变换器和开关电容电路的非隔离降压-升压变换器拓扑结构，以满足可再生能源应用中对高电压增益的需求。采用单占空比对该变换器在连续导通模式下的工作进行了研究。该变换器的电压增益是传统SEPIC增益的两倍。此外，所提出电路的开关和二极管上的电压应力低于或可与其他相关的现有转换器相媲美。为了进一步证明电路的可行性，在占空比和负载电阻的动态变化下，研究了该电路在升压和降压模式下的性能。设计了额定功率为200w的变换器样机，并在实验室进行了测试。该变换器的最大理论效率为93.46%，最大实验效率约为91.81%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computers & Electrical Engineering 工程技术-工程：电子与电气

CiteScore

9.20

自引率

7.00%

发文量

661

审稿时长

47 days

期刊介绍： The impact of computers has nowhere been more revolutionary than in electrical engineering. The design, analysis, and operation of electrical and electronic systems are now dominated by computers, a transformation that has been motivated by the natural ease of interface between computers and electrical systems, and the promise of spectacular improvements in speed and efficiency. Published since 1973, Computers & Electrical Engineering provides rapid publication of topical research into the integration of computer technology and computational techniques with electrical and electronic systems. The journal publishes papers featuring novel implementations of computers and computational techniques in areas like signal and image processing, high-performance computing, parallel processing, and communications. Special attention will be paid to papers describing innovative architectures, algorithms, and software tools.