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首页> 外文期刊>IEEE Transactions on Power Electronics >Energy Feedback Control of Light-Load Voltage Regulation for LLC Resonant Converter
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Energy Feedback Control of Light-Load Voltage Regulation for LLC Resonant Converter

机译： LLC 谐振变换器的轻载调压的能量反馈控制

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摘要

An LLC resonant converter would have light-load voltage regulation problems due to the effect of parasitic capacitances in a high-frequency range. In this paper, an energy feedback controlmethod is proposed to improve the light-load regulation capacity by using synchronous rectifiers (SRs). The SR bridges are controlled ahead of the primary inverter bridges to deliver the energy from load to source, reducing the output voltage independent of the load. Then the desired voltage can be achieved even in no-load conditions by regulating the operation time of the energy feedback mode. The gain, voltage ripple, and efficiency performances of the proposed control method are discussed based on the precise analysis and an accurate model of the converter. Moreover, the light-load operations of the LLC resonant converter are analyzed deriving the critical load condition. Finally, the proposed control method is verified by the experiments of a 12 V/8 A LLC resonant converter prototype.
机译：由于高频范围内寄生电容的影响，LLC谐振转换器会产生轻负载电压调节问题。本文提出了一种能量反馈控制方法，通过使用同步整流器（SR）来提高轻载调节能力。 SR桥在初级逆变器桥之前被控制，以将能量从负载传递到电源，从而降低了与负载无关的输出电压。然后，通过调节能量反馈模式的工作时间，即使在空载条件下也可以达到所需的电压。基于变换器的精确分析和精确模型，讨论了所提出的控制方法的增益，电压纹波和效率性能。此外，分析了LLC谐振转换器的轻载运行情况，得出了临界负载条件。最后，通过12 V / 8 A LLC谐振转换器原型的实验验证了所提出的控制方法。

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  • 来源
    《IEEE Transactions on Power Electronics》 |2019年第5期|4807-4819|共13页
  • 作者

    Fang Zhijian; Wang Junhua; Liu Rong; Xiao Liangle; Zhang Junkun; Hu Guozhen; Liu Qisheng;

  • 作者单位

    Wuhan Univ, Sch Elect Engn, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Sch Elect Engn, Wuhan 430072, Hubei, Peoples R China;

    Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Peoples R China;

    China Elect Power Res Inst, Wuhan 430074, Hubei, Peoples R China;

    Hunan Univ, Coll Elect & Informat Engn, Changsha 410082, Hunan, Peoples R China;

    Hubei Polytech Univ, Huangshi 435003, Hubei, Peoples R China;

    Wuhan Univ, Sch Elect Engn, Wuhan 430072, Hubei, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Control method; energy feedback; light load; LLC resonant converter;

    机译：控制方法;能量反馈;轻负载;LLC谐振转换器;

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