A low stress, high voltage, switched capacitor and active switched inductor DC‐DC converter

IF 1.8 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Circuit Theory and Applications Pub Date : 2024-08-01 DOI:10.1002/cta.4190

Motiur Reza, Avneet Kumar, Pan Xuewei

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引用次数: 0

Abstract

SummaryA novel, high voltage gain, non‐isolated, non‐coupled DC‐DC converter is proposed for applications such as PV systems, HEV, aerospace, and so forth. The proposed converter consists of two active switches in parallel, which are turned on and off simultaneously, two inductors in parallel and switched capacitors arrangements. During charging, both the inductor comes in parallel with voltage source and effectively reduces the ripple current and inductor size. These factors attribute to the lower power loss and low cost. The voltage stress of the switches is at least 5 times lower than the output voltage, which allows the use of low switches. The voltage stresses of the diodes are also at least 2.5 times lower than the output voltage, which enables to use low forward voltage drop diodes, and hence, the total power loss due to diode will be further reduced. Lower capacitors' stress also results in reduced parasitics. The detailed steady‐state analysis of the proposed converter and its comparison with the existing converters are presented. The efficiency of the proposed converter is highest. The hardware prototype of 325 W is implemented to boost the voltage by 18 times, and results are presented. The closed‐loop analysis of the proposed converter is also carried out. The maximum efficiency of the proposed converter is reported 96% for 100 W and 93% for 300 W.

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低应力、高电压、开关电容器和有源开关电感器 DC-DC 转换器

摘要针对光伏系统、混合动力汽车、航空航天等应用，提出了一种新型、高电压增益、非隔离、非耦合 DC-DC 转换器。拟议的转换器由两个并联的有源开关（同时打开和关闭）、两个并联的电感器和开关电容器组成。在充电过程中，两个电感器都与电压源并联，从而有效降低了纹波电流和电感器尺寸。这些因素都有助于降低功率损耗和成本。开关的电压应力至少比输出电压低 5 倍，因此可以使用低开关。二极管的电压应力也至少比输出电压低 2.5 倍，因此可以使用低正向压降二极管，从而进一步降低二极管造成的总功率损耗。较低的电容器应力也会减少寄生效应。本文详细介绍了拟议转换器的稳态分析及其与现有转换器的比较。建议的转换器效率最高。实现了 325 W 的硬件原型，将电压提升了 18 倍，并给出了结果。此外，还对拟议的转换器进行了闭环分析。据报告，100 W 和 300 W 转换器的最高效率分别为 96% 和 93%。

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

International Journal of Circuit Theory and Applications 工程技术-工程：电子与电气

CiteScore

3.60

自引率

34.80%

发文量

277

审稿时长

4.5 months

期刊介绍： The scope of the Journal comprises all aspects of the theory and design of analog and digital circuits together with the application of the ideas and techniques of circuit theory in other fields of science and engineering. Examples of the areas covered include: Fundamental Circuit Theory together with its mathematical and computational aspects; Circuit modeling of devices; Synthesis and design of filters and active circuits; Neural networks; Nonlinear and chaotic circuits; Signal processing and VLSI; Distributed, switched and digital circuits; Power electronics; Solid state devices. Contributions to CAD and simulation are welcome.