| 引用本文: | 邱 燕,肖 岚,曹海港.基于噪声仿真的EMI滤波器研究[J].电力自动化设备,2010,(9): |
| QIU Yan,XIAO Lan,CAO Haigang.EMI filter design based on noise simulation[J].Electric Power Automation Equipment,2010,(9): |
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| 摘要: |
| 提出一种依据仿真得到的开关电源噪声进行电磁干扰（EMI）滤波器设计的方法。针对Boost功率因数校正变换器，应用SABER软件仿真不同寄生参数下的噪声幅值，得到了影响共模噪声和差模噪声的主要因素：差模噪声主要是由功率器件的高频模型引起的，而共模噪声则与无源器件的高频模型以及MOSFET对地漏电容相关，且随着漏电容的增加而增加。在考虑功率器件的高频模型、MOSFET的对地漏电容以及无源器件的高频寄生参数等影响的情况下，采用噪声仿真的方法分离出变换器的共模噪声和差模噪声。在此基础上，应用插入电压增益的方法，计算出共模滤波器和差模滤波器的截止频率，设计了EMI滤波器。实验验证了仿真的准确性以及滤波器设计方法的正确性。 |
| 关键词: EMI滤波器 仿真 插入电压增益 共模滤波器 差模滤波器 |
| DOI： |
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| EMI filter design based on noise simulation |
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QIU Yan, XIAO Lan, CAO Haigang
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College of Aeronautics & Astronautics，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
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| Abstract: |
| The method of EMI（Electro Magnetic Interference） filter design based on the simulative noise of switching power supply is put forward. The noise amplitudes under different parasitic parameters are simulated with SABER software for the Boost Power Factor Corrector and it is found that：the differential-mode noise is mainly induced by the high frequency models of power devices and the common-mode noise is mainly related to the high-frequency parameters of passive devices，which increases with the increase of the drain-to-ground capacitance of MOSFET. With the consideration of the aforementioned causes，the common-mode noise is separated from the differential-mode noise by noise simulation，based on which，the cut-off frequency of common-mode filter or differential-mode filter is calculated with insertion voltage gain method. The EMI filter is thus designed. The experimental results show the correctness of the proposed design method. |
| Key words: EMI filter simulation insertion voltage gain common-mode filter differential-mode filter |
