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Conducted electromagnetic interference analysis and mitigation using zero-current transition soft switching and spread spectrum techniques

机译:使用零电流过渡软开关和扩频技术进行电磁干扰分析和缓解

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摘要

Switching power converters cause electromagnetic interference (EMI), which can disturb the normal operation of the converter itself and other adjacent systems. Power converters must comply with electromagnetic compatibility (EMC) standards to guarantee proper operation of converters and nearby systems. Soft switching methods can be employed as EMI mitigation techniques in power converters. Although, soft switching converters are commonly addressed to have lower EMI than hard switching counterparts, they may not satisfy EMC regulations. In this study, spread spectrum by the means of pseudorandom modulation is applied to a zero-current transition (ZCT) flyback converter. By extracting the converter EMI model, the effect of using ZCT soft switching method is simulated and compared to its hard switching counterpart. The reduced amount of conducted electromagnetic emission is demonstrated via the proposed simulation method. To justify the theoretical analysis, the experimental results are presented.
机译:开关电源转换器会引起电磁干扰(EMI),这会干扰转换器本身和其他相邻系统的正常运行。电源转换器必须符合电磁兼容性(EMC)标准,以保证转换器和附近系统的正常运行。软开关方法可以用作电源转换器中的EMI缓解技术。尽管通常将软开关转换器解决为具有比硬开关转换器更低的EMI,但它们可能不满足EMC法规。在这项研究中,借助于伪随机调制的扩展频谱被应用于零电流转换(ZCT)反激转换器。通过提取转换器的EMI模型,模拟了使用ZCT软开关方法的效果,并将其与硬开关方法进行了比较。通过提出的仿真方法证明了减少的传导电磁辐射量。为了证明理论分析的正确性,给出了实验结果。

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  • 来源
    《Power Electronics, IET》 |2012年第7期|p.1034-1041|共8页
  • 作者

    Yazdani M.R.; Farzanehfard H.;

  • 作者单位

    Department of Electrical Engineering, Khorasgan (Isfahan) Branch, Islamic Azad University, Isfahan, Iran;

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  • 正文语种 eng
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