带无损被动元件辅助电路的零压开关三电平非隔离双向 DC/DC 转换器及面向设计的分析

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

International Journal of Circuit Theory and Applications Pub Date : 2024-09-09 DOI:10.1002/cta.4269

Yingbao Liang, Fan Xie, Yanlin Liu, Bo Zhang, Dongyuan Qiu

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引用次数: 0

摘要

三电平双向降压/升压转换器（TLBBBC）适用于其开关具有半电压的高压直流链路的电力电子系统。为了实现更高的效率，本文提出了一种新型零电压开关（ZVS）TLBBBC，以实现更高的开关频率。在所提出的 ZVS TLBBBC 中，两个相同的 ZVS 单元（每个单元由一个谐振电感器、两个缓冲电容器和两个谐振电容器组成）与传统的三电平 (TL) 拓扑集成在一起，使所有四个开关都能在降压和升压模式下实现软开关。这样做的一个好处是，在传统控制方法下，无需使用辅助开关或复杂的控制方法，即可确保软开关条件。此外，还推导出了软开关区域，清楚地说明了占空比与确保软开关条件的功率电感电流之间的关系。因此，软开关区域有利于辅助 ZVS 单元设计，并指导转换器在 ZVS 中运行。然后，详细分析了拟议拓扑结构的运行和设计考虑因素。最后，介绍了升压和降压模式下 800 瓦原型的实验结果，以证实理论分析。

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A Zero‐Voltage Switching Three‐Level Nonisolated Bidirectional DC/DC Converter With a Lossless Passive Component Auxiliary Circuit and Design‐Oriented Analysis

A three‐level bidirectional buck/boost converter (TLBBBC) is suitable for power electronic systems with a high‐voltage DC link for its switches with half voltage. In order to achieve higher efficiency, a novel zero‐voltage switching (ZVS) TLBBBC is proposed in this paper to enable operation with higher switching frequencies. In the proposed ZVS TLBBBC, two identical ZVS cells, each composed of a resonant inductor, two snubber capacitors, and two resonant capacitors, are integrated with the conventional three‐level (TL) topology to enable soft switching in all four switches in both buck and boost modes. Here, one advantage is that soft‐switching conditions are ensured under conventional control methods without using the auxiliary switch or complex control methods. In addition, the soft‐switching region is derived, clearly illustrating the relationship between the duty cycle ratio and the power inductor current that ensures the soft‐switching condition. Hence, the soft‐switching region is beneficial for assisting in ZVS cell design and guiding the converter in running in ZVS. Then, the operation and design considerations of the proposed topology are analyzed in detail. Finally, the experimental results of an 800‐W prototype for both the boost and buck modes are presented to confirm the theoretical analysis.

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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.