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Pulse train controlled buck converter with coupled inductors

机译：脉冲串控制的降压转换器，带有耦合电感器

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摘要

Pulse train (PT) controlled switching DC/DC converters possess advantages of simple structure, fast dynamic response, good robustness etc. but also accompanied by undesirable low-frequency oscillation phenomenon when the converters are operated in continuous conduction mode (CCM). To mitigate the low-frequency oscillations of PT controlled buck converters, a novel buck converter with coupled inductor is proposed in this paper. Firstly, the mechanism of the low-frequency oscillation is analysed, the corresponding oscillation suppression method is discussed and the discrete-time model of the proposed converter is constructed. Furthermore, the bifurcation and time-domain diagrams of the output voltage and the switching peak current in terms of coupling coefficient and load variation are reported, and the influence from the coupling coefficient and load on low-frequency oscillation behaviours is revealed. The experimental results verify that the output voltage of the PT controlled proposed buck converter can be timely adjusted based on proper configuration of the coupling coefficient, and hence the low-frequency oscillation can be eliminated and the maximum switching peak current can be decreased.
机译：脉冲串（PT）控制的开关DC / DC转换器具有结构简单，动态响应快，鲁棒性强等优点，但在以连续导通模式（CCM）运行时，还会伴随着不良的低频振荡现象。为了减轻PT控制的降压转换器的低频振荡，本文提出了一种新型的带耦合电感的降压转换器。首先，分析了低频振荡的机理，讨论了相应的振荡抑制方法，并建立了该转换器的离散时间模型。此外，还报告了输出电压和开关峰值电流在耦合系数和负载变化方面的分叉和时域图，并揭示了耦合系数和负载对低频振荡行为的影响。实验结果证明，根据耦合系数的适当配置，可以及时调节PT控制的降压转换器的输出电压，从而可以消除低频振荡，减小最大开关峰值电流。

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  • 来源
    《Power Electronics, IET》 |2017年第10期|1231-1239|共9页
  • 作者

    Dongsheng Yu; Long Wang; Yisen Geng; Caoyuan Ma; Zongbin Ye; Yang Liu;

  • 作者单位

    China University of Mining and Technology, People's Republic of China;

    China University of Mining and Technology, People's Republic of China;

    China University of Mining and Technology, People's Republic of China;

    China University of Mining and Technology, People's Republic of China;

    China University of Mining and Technology, People's Republic of China;

    South China University of Technology, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bifurcation; inductors; power convertors;

    机译：分叉电感功率变换器;

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