This study proposes a non-isolated quadratic boost converter (QBC) that features a low-output-voltage ripple with respect to traditional QBCs. This advantage is in contrast with other topologies that require a higher amount of stored energy by capacitors to achieve the same output-voltage ripple specification. This benefit permits to design a compact converter, since the size of capacitors is proportional to their energy storage rating. Moreover, the proposed transformerless topology is suitable for applications that require high-voltage gains as in the case of renewable energy applications. The main properties of the converter are corroborated as well as its advantages by providing mathematical models, analytical waveforms and experiments.

中文翻译：

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具有低输出电压纹波的二次升压转换器

这项研究提出了一种非隔离式二次升压转换器（QBC），该转换器具有相对于传统QBC而言低的输出电压纹波。与其他拓扑结构相比，该优势与其他拓扑结构不同，其他拓扑结构需要电容器存储更多的能量，以实现相同的输出电压纹波规格。由于电容器的尺寸与它们的储能额定值成正比，所以该优点允许设计紧凑的转换器。此外，所提出的无变压器拓扑结构适合于需要高电压增益的应用，例如可再生能源应用。通过提供数学模型，分析波形和实验，证实了转换器的主要特性及其优势。