Fast-Convergent Time-Domain Algorithm Based Parameter Optimization for Phase-Shift LLC Converters

被引:2
|
作者
Chen, Wenzhe [1 ]
Zhao, Jianfeng [1 ]
Jin, Cheng [1 ]
Liu, Kangli [2 ]
机构
[1] Southeast Univ, Sch Elect Engn, Nanjing 210096, Peoples R China
[2] Tech Univ Munich, Chair High Power Converter Syst, D-80333 Munich, Germany
基金
中国国家自然科学基金;
关键词
Iterative initial value estimation; iterative variables simplification; parameter optimization; phase-shift LLC converter; RESONANT CONVERTER; OPTIMAL-DESIGN; TRANSFORMER;
D O I
10.1109/TIE.2022.3204961
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
LLC resonant converters have drawn growing attention from industries. Time-domain analysis has the advantage of high accuracy, promoting the utilization of resonant tanks. This article proposes a parameter optimization methodology for phase-shift LLC converters based on a fast-convergent time-domain algorithm. The algorithm can be extended to different operating modes, rather than confined to a specific mode. It minimizes the number of iterative variables in the time analysis and reasonably estimates its initial points based on the fundamental harmonic analysis. Thus, accurate results can be obtained much faster than the existing time-domain algorithms. The property of fast convergence makes it easy to quantitatively investigate the power loss characteristics, based on which the parameter optimization methodology is proposed. The methodology guarantees that the converter achieves zero voltage switching for the primary switches and zero current switching for the secondary diodes in the entire operating region. The energy conversion efficiency is improved by reducing the conduction loss and switching loss. The effectiveness of the proposed methodology is verified by a 2-kW experimental prototype, whose peak efficiency is 96.3%.
引用
收藏
页码:6786 / 6797
页数:12
相关论文
共 3 条
  • [1] A Line Cycle Synchronous Rectification Strategy Based on Time-Domain Analysis for Single- Stage AC-DC LLC Converters
    Forouzesh, Mojtaba
    Liu, Yan-Fei
    Sen, Paresh C.
    IEEE TRANSACTIONS ON POWER ELECTRONICS, 2023, 38 (04) : 5077 - 5091
  • [2] Parameter optimization of eddy current damper based on energy dissipation equivalence and time-domain explicit method
    Liang L.
    Liang L.
    Su C.
    Feng Z.
    Chen Z.
    Tumu Gongcheng Xuebao/China Civil Engineering Journal, 2023, 56 (09): : 81 - 89and99
  • [3] Design Methodology of Three-Phase LLC Charger Based on Time-Domain Model With Enhanced Analytical Accuracy and Power Efficiency
    Guo, Ning
    Liu, Jinjun
    Du, Sixing
    Li, Cong
    Chen, Hui
    Deng, Zhifeng
    IEEE TRANSACTIONS ON POWER ELECTRONICS, 2025, 40 (05) : 7042 - 7057