电器与能效管理技术 ›› 2026, Vol. 0 ›› Issue (7): 13-20.doi: 10.16628/j.cnki.2095-8188.2026.07.002

• 研究与分析 • 上一篇    下一篇

交错两相LLC谐振变换器的移相均流控制与磁集成设计

王乐彬, 张丽萍, 刘煌铭   

  1. 福州大学 电气工程与自动化学院, 福建 福州 350108
  • 收稿日期:2026-01-20 出版日期:2026-07-30 发布日期:2026-08-12
  • 作者简介:王乐彬(2001—),男,硕士研究生,研究方向为电力电子高频磁技术。|张丽萍(1977—),女,博士,研究方向为电力电子高频磁技术。|刘煌铭(1998—),男,硕士研究生,研究方向为电力电子高频磁技术。
  • 基金资助:
    福建省自然科学基金项目(2022J05196)

Current-Sharing Control and Integrated Magnetics Design for Two-Phase Interleaved Parallel LLC Resonant Converter

Wang Lebin, Zhang Liping, Liu Huangming   

  1. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
  • Received:2026-01-20 Online:2026-07-30 Published:2026-08-12

摘要:

针对两相交错并联电感-电感-电容(LLC)谐振变换器中输出电流不均衡的问题,提出一种基于移相控制的均流策略。首先推导移相控制方式下的电压增益解析式,从理论上验证该策略实现均流的可行性。其次,为减小磁性元件体积并提高功率密度,对变换器进行了磁集成设计。最后,搭建1 kW、48 V样机,与分立磁元件方案开展对比实验。实验结果表明,所提出的移相均流控制与磁集成方案可将两相电流不均流度控制在5%以内,与分立磁元件方案相比,磁性元件体积减小了7.1%,变换器效率提升了0.7%,验证了理论分析与设计方案的合理性与可行性。

关键词: 交错并联LLC, 移相控制, 磁性元件, 磁集成

Abstract:

To address output-current imbalance in a two-phase interleaved parallel LLC resonant converter,a phase-shift-based current-sharing strategy is proposed.Firstly,an analytical expression of the voltage gain under phase-shift modulation is derived,theoretically confirming the feasibility of achieving current sharing.Secondly,to reduce the volume of magnetic components and improve power density,an integrated magnetics design is developed for the converter.Finally,a 1 kW/48 V prototype is built and comparative experiments are conducted between discrete magnetics and integrated magnetics implementations.Experimental results demonstrate that the proposed phase-shift current-sharing control together with the integrated magnetics scheme can limit the current imbalance between the two phases to within 5%.Compared with the discrete magnetics solution,the magnetic-component volume is reduced by 7.1% and the converter efficiency is improved by 0.7%,validating the rationality and feasibility of the theoretical analysis and design.

Key words: interleaved parallel LLC, phase-shift control, magnetic components, integrated magnetics

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