Design and optimization of 30 kW CLLLC resonant converter for vehicle‐to‐grid applications

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

International Journal of Circuit Theory and Applications Pub Date : 2024-07-17 DOI:10.1002/cta.4181

Donghao Tian, Yu Tang, Zhe Shi

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引用次数: 0

Abstract

The CLLLC resonant converter is a promising technology for electric vehicles and microgrids due to its ability to operate bidirectionally. This article presents a design of a bidirectional CLLLC resonant converter that is applied in the vehicle‐to‐grid (V2G). The battery side of the converter uses a two‐channel parallel structure to enhance its efficiency and reliability. In contrast, the DC‐bus side uses a transformer series structure to obtain the benefits of passive current sharing on the secondary side and reduce the transformer turns ratio. By utilizing the proposed design method, the converter can achieve a wide input and output voltage range, high efficiency, and high power density. The article analyzes the working principle of the converter and explains the design process, which includes the transformer turns ratio, magnetizing inductance, and resonance parameters. Finally, an experimental prototype is produced to verify the theory's validity and the design's feasibility. The prototype has a DC‐bus side voltage of 660–860 V, a battery side voltage of 250–500 V, and a maximum power output of 30 kW. The peak efficiency of the prototype is 98.2%, and its power density can reach up to 8 kW/L.

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设计和优化用于车联网应用的 30 千瓦 CLLLC 谐振转换器

CLLLC 谐振转换器因其双向运行能力而成为电动汽车和微电网的一项前景广阔的技术。本文介绍了应用于车辆到电网（V2G）的双向 CLLLC 谐振转换器的设计。转换器的电池侧采用双通道并联结构，以提高效率和可靠性。而直流母线侧则采用变压器串联结构，以获得次级侧无源分流的优势，并降低变压器匝数比。利用所提出的设计方法，该转换器可实现宽输入和输出电压范围、高效率和高功率密度。文章分析了转换器的工作原理，并解释了设计过程，包括变压器匝比、磁化电感和谐振参数。最后，文章制作了一个实验原型，以验证理论的正确性和设计的可行性。原型机的直流母线电压为 660-860 V，电池侧电压为 250-500 V，最大输出功率为 30 kW。原型机的峰值效率为 98.2%，功率密度可达 8 kW/L。

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.