A new transformerless buck-boost converter with improved voltage gain and continuous input current

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-02-17 DOI:10.1049/pel2.12671

Majid Hosseinpour, Mahsa Ahmadi, Ali Seifi, Seyed Hossein Hosseini

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Abstract

This paper proposes a new transformerless buck-boost converter with an extended voltage conversion ratio. This converter has semi-quadratic voltage gain, which provides more gain with lower duty cycles. This converter has a simple structure and easy implementation, which reduces the cost and increases efficiency. The proposed converter operates in continuous conduction mode and provides two operation modes by turning on and off the switches. The suggested converter has continuous input current and low input current ripple, which is important when utilizing renewable energy sources. The calculation of the proposed converter includes ideal and practical voltage gain, current calculations, voltage stresses of the switches and diodes, current stress of the switches, parameter design, efficiency, and a brief analysis of discontinuous conduction mode and boundary conditions. The proposed converter provides efficiency of about 93.1% in boost mode and 92.14% in buck mode at 50 W output power. The suggested converter varies the input voltage from 20 to 48 V in boost mode and changes the input voltage from 20 to 10.4 V in buck mode. Finally, a laboratory prototype has been built to prove and evaluate the simulation results and theoretical analysis of the proposed converter.

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一种新型无变压器降压-升压转换器，具有更好的电压增益和连续输入电流

本文提出了一种具有扩展电压转换率的新型无变压器降压-升压转换器。这种转换器具有半二次电压增益，可在较低占空比的情况下提供更多增益。该转换器结构简单，易于实现，从而降低了成本，提高了效率。建议的转换器以连续导通模式运行，并通过开关的开启和关闭提供两种运行模式。建议的转换器具有连续的输入电流和较低的输入电流纹波，这在利用可再生能源时非常重要。拟议转换器的计算包括理想和实际电压增益、电流计算、开关和二极管的电压应力、开关的电流应力、参数设计、效率，以及对不连续传导模式和边界条件的简要分析。在输出功率为 50 W 时，建议的转换器在升压模式下的效率约为 93.1%，在降压模式下的效率约为 92.14%。建议的转换器在升压模式下可将输入电压从 20 V 变为 48 V，在降压模式下可将输入电压从 20 V 变为 10.4 V。最后，还制作了一个实验室原型，以证明和评估所建议的转换器的仿真结果和理论分析。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.