A Novel CTTC Structure and Optimization Design Method for CLLC Bidirectional Resonant Converter

IF 6.5 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Power Electronics Pub Date : 2025-01-31 DOI:10.1109/TPEL.2025.3536010

Min Chen;Liwen Jia;Bodong Li;Dongbo Zhang;Feng Jiang

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Abstract

The resonant tank of CLLC converter incorporates numerous magnetic components. To enhance power density, magnetic integration technology has become a key research focus. This article proposed a new capacitor-transformer-transformer-capacitor (CTTC) structure with variable parameter configuration for the resonant tank of CLLC converter, effectively reducing both the number and volume of magnetic elements. The power transfer characteristics of two magnetic elements at different turns ratio are analyzed, and the design and optimization strategies for the magnetic elements are presented. Compared to the traditional CLLC structure, the proposed CTTC structure effectively reduces volume while maintaining the same control methods and operating modes. The synchronous rectification control method employed by the converter with the proposed CTTC structure is also discussed. A performance evaluation of the CLLC converter utilizing the CTTC structure has been conducted, focusing on the effects of circuit parasitic parameters and leakage inductors. Finally, the validity is verified by a 3 kW bidirectional CLLC prototype.

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CLLC双向谐振变换器CTTC结构及优化设计方法

CLLC变换器的谐振槽由许多磁性元件组成。为了提高功率密度，磁集成技术已成为研究的重点。本文针对CLLC变换器谐振槽提出了一种变参数配置的CTTC （capacitor-transformer-transformer-capacitor）结构，有效地减少了磁性元件的数量和体积。分析了两种磁性元件在不同匝比下的功率传输特性，提出了磁性元件的设计与优化策略。与传统的CLLC结构相比，本文提出的CTTC结构在保持控制方法和运行模式不变的情况下，有效地减小了体积。文中还讨论了采用CTTC结构的变流器采用同步整流控制的方法。对采用CTTC结构的CLLC变换器进行了性能评估，重点研究了电路寄生参数和泄漏电感的影响。最后，通过3kw双向CLLC样机验证了该方法的有效性。

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来源期刊

IEEE Transactions on Power Electronics 工程技术-工程：电子与电气

CiteScore

15.20

自引率

20.90%

发文量

1099

审稿时长

3 months

期刊介绍： The IEEE Transactions on Power Electronics journal covers all issues of widespread or generic interest to engineers who work in the field of power electronics. The Journal editors will enforce standards and a review policy equivalent to the IEEE Transactions, and only papers of high technical quality will be accepted. Papers which treat new and novel device, circuit or system issues which are of generic interest to power electronics engineers are published. Papers which are not within the scope of this Journal will be forwarded to the appropriate IEEE Journal or Transactions editors. Examples of papers which would be more appropriately published in other Journals or Transactions include: 1) Papers describing semiconductor or electron device physics. These papers would be more appropriate for the IEEE Transactions on Electron Devices. 2) Papers describing applications in specific areas: e.g., industry, instrumentation, utility power systems, aerospace, industrial electronics, etc. These papers would be more appropriate for the Transactions of the Society which is concerned with these applications. 3) Papers describing magnetic materials and magnetic device physics. These papers would be more appropriate for the IEEE Transactions on Magnetics. 4) Papers on machine theory. These papers would be more appropriate for the IEEE Transactions on Power Systems. While original papers of significant technical content will comprise the major portion of the Journal, tutorial papers and papers of historical value are also reviewed for publication.