| 基于传输线变压器理论的传导EMI噪声测试网络 |
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| 引用本文： | 吴锡,毕务忠. 基于传输线变压器理论的传导EMI噪声测试网络[J]. 电测与仪表, 2010, 47(4) |
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| 作者姓名： | 吴锡 毕务忠 |
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| 作者单位： | 成都信息工程学院,电子工程系,成都,610225;成都信息工程学院,电子工程系,成都,610225 |
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| 摘 要： | 对传导电磁干扰进行准确测量是对设备电磁干扰进行准确量化和有效降低电磁干扰的重要工作。传统的噪声分离电路没有考虑变压器的寄生参数,在测试端口处CM噪声与DM噪声相互干扰较大。针对该问题,本文结合传输线变压器理论设计了一种新型的传导EMI噪声测试网络。该网络对变压器的寄生参数进行了良好的控制,对测试网络的输入、输出阻抗进行了精确的匹配。在PSpice中建立电路仿真模型对噪声分离网络进行仿真,从仿真结果可以看出该网络有良好的传导EMI噪声分离效果。
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| 关 键 词： | EMI 噪声分离 传输线变压器 |
A Conducted EMI Noise Separation Network Based on Transmission Line Transformer |
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| WU Xi,BI Wu-zhong. A Conducted EMI Noise Separation Network Based on Transmission Line Transformer[J]. Electrical Measurement & Instrumentation, 2010, 47(4) |
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| Authors: | WU Xi BI Wu-zhong |
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| Affiliation: | WU Xi,BI Wu-zhong(Department ofElectronic Engineering,Chengdu UniversityofInformation Technology,Chengdu 610225,China) |
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| Abstract: | Accurate measurement of the conducted EMI noise is important to qualify and decrease the conducted EMI noise.The conventional conducted EMI noise test methods did not consider the parasitic parameter of the transformer and had crosstalk interference at the test port of the CM and DM noise.In this paper,a novel conducted EMI test network based on the transmission line transformer was proposed.Parasitic parameters of transformer were attenuated in this test network and the input and output impedances are matc... |
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| Keywords: | EMI |
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