吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (1): 216-221.doi: 10.13229/j.cnki.jdxbgxb201501032

• 论文 • 上一篇    下一篇

基于开关电源的三相电磁干扰滤波器

周逢道，董威，包志强，薛开昶，胡越，孙彩堂   

  1. 吉林大学 仪器科学与电气工程学院，长春 130061
  • 收稿日期:2013-09-12 出版日期:2015-02-01 发布日期:2015-02-01
  • 通讯作者: 孙彩堂(1975),男,副教授,博士.研究方向:数据处理与可视化.E-mail:sunct@jlu.edu.cn
  • 作者简介:周逢道(1970)，男，教授，博士.研究方向:功率变换技术及其应用.E-mail:zhoufd@jlu.edu.cn
  • 基金资助:
    国家潜在油气资源(油页岩勘探开发利用)产学研用合作创新研究项目(OSR-02,OSP-2).

Three-phase EMI filter based on switching power supply

ZHOU Feng-dao,DONG Wei,BAO Zhi-qiang,XUE Kai-chang,HU Yue,SUN Cai-tang   

  1. College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061,China
  • Received:2013-09-12 Online:2015-02-01 Published:2015-02-01

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摘要： 为了抑制三相开关电源注入电网的电磁干扰(EMI)，提出了三相EMI滤波器的设计方法。构建了三相共模、差模滤波器的理想等效电路，并分析了高频对理想等效电路的影响;确定了基于参数矩阵的插入损耗表达式，并在理想和高频情况下，分别推导出共模、差模滤波器的参数矩阵。根据电网侧负载阻抗和开关电源侧源阻抗的特性，分析了插入损耗与频率的关系;由于高导软磁铁氧体具有旋磁频率极限和非线性磁滞回线，分析了二者对共模电感的抑制作用和共模插入损耗的影响。根据相关标准及抑制效果要求，确定三相EMI滤波器的参数。实验结果表明:插入三相EMI滤波器后，开关电源的噪声峰值得到约21 dB的抑制。

关键词: 电气工程, 电磁兼容, 三相EMI滤波器, 开关电源, 共模电感

Abstract: In order to suppress the injection of three-phase Electromagnetic Interference (EMI) of switching power supply into the power grid, a design method of three-phase EMI filter is proposed. By modeling and analyzing the three-phase common-mode inductance, the ideal equivalent circuits of common-mode and differential-mode filters are built. The effect of high frequency on ideal equivalent circuits is analyzed. The insertion loss expression based on parameter matrix is determined. Parameter matrixes of common-mode and differential-mode filters are derived under ideal and high frequency conditions. According to the characteristics of load impedance in the power grid side and source impedance in the switching power supply side, the relationship between insertion loss and frequency is analyzed. Because that high conductivity of soft magnetic ferrite has gyromagnetic frequency limit and nonlinear hysteresis loop, their inhibitory effect on common-mode inductance and their influence on common-mode insertion loss are analyzed. The filter's parameters are determined based on the related suppress standards and requirements. Experiment results show that using three-phase EMI filter the noise peak of the switching power supply can be suppressed by about 21dB.

Key words: electrical engineering, electromagnetic compatibility, three-phase EMI filter, switching power supply, common-modeinductor

中图分类号: 

  • TN713
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