[1] Qiu Xiaohui, Zhao Yang, Xie Shaojun, et al. A novel approach to conductive EMI noise source modeling [J]. Journal of Southeast University (English Edition), 2009, 25 (2): 161-166. [doi:10.3969/j.issn.1003-7985.2009.02.004]

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A novel approach to conductive EMI noise source modeling()

一种传导电磁干扰噪声源建模新方法

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

25

Issue:

2009 2

Page:

161-166

Research Field:

Electrical Engineering

Publishing date:

2009-06-30

Info

Title:

A novel approach to conductive EMI noise source modeling

一种传导电磁干扰噪声源建模新方法

Author(s):

Qiu Xiaohui^{1, 2}, Zhao Yang^{3, 4}, Xie Shaojun⁵, Chu Jiamei³, Jiang Ningqiu⁴

¹ College of Communications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
² School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, China
³ State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
⁴ School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210042, China
⁵ Defense Science Key Laboratory of Aeronautical Power Supply, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

邱晓晖^{1, 2}, 赵阳^{3, 4}, 谢少军⁵, 褚家美³, 姜宁秋⁴

¹ 南京邮电大学通信与信息工程学院, 南京 210003; ²中国矿业大学信息与电气学院, 徐州 221008; ³东南大学毫米波国家重点实验室, 南京 210096; ⁴南京师范大学电气与自动化工程学院, 南京 210042; ⁵南京航空航天大学航空电源国防重点实验室, 南京 210016

Keywords:

noise source modeling;  impedance estimation;  electromagnetic interference

噪声源建模;  阻抗估计;  电磁干扰

PACS:

TM461;TN03

DOI:

10.3969/j.issn.1003-7985.2009.02.004

Abstract:

A new approach to conductive electromagnetic interference(EMI)noise source modeling, i.e.the source internal impedance extraction, is presented.First, the impedance magnitude is achieved through an exciting probe and a detecting probe, or through calculations based on insertion loss measurement results when inserting a series high-value known impedance or a shunt low-value known impedance in the circuit.Then the impedance phase is extracted by the Hilbert transform(HT)of the logarithm of the obtained impedance magnitude.Performance studies show that the estimated phase error can increase greatly at a zero frequency in the Hilbert transform because of the existence of a singular point, and this effect can be eliminated by introducing a zero-point when the noise source does not include a series-connected capacitive component.It is also found that when the frequency is higher than 150 kHz, the estimated phase error is not sensitive to the inductive source but sensitive to the capacitive source.Finally, under the conditions of the same measurement accuracies for impedance magnitude, the accuracy of complex impedance based on the HT can be improved about 10 times when compared with the accuracy of estimated parameters based on the impedance magnitude fitting method(IMFM).

提出一种传导噪声源建模即内阻抗提取新方法.该方法首先通过激励和检测探头测得阻抗模, 或通过串联已知高阻抗、并联已知低阻抗的插损测量, 计算得到阻抗模.然后利用得到的阻抗模的对数进行Hilbert变换(HT)提取阻抗相位.对该方法的性能研究表明, Hilbert变换在零频率处存在的奇异点会引起该处相位估计误差骤增, 对不含串联电容的情况可引入零点以消除该影响;当频率高于150 kHz时, 估计误差对感性噪声源的变化不敏感, 而对容性噪声源的变化敏感;同样阻抗模测量精度下, 基于HT获取复阻抗比基于阻抗模拟合的参数估计精度提高近10倍.

References:

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Memo

Memo:

Biography: Qiu Xiaohui(1968—), female, associate professor, qiuxh@njupt.edu.cn.
Foundation items: The Natural Science Foundation of Jiangsu Province(No.BK2008429), Open Research Foundation of State Key Laboratory of Millimeter Waves of Southeast University(No.K200603), China Postdoctoral Science Foundation(No.20080431126), Jiangsu Postdoctoral Science Foundation(No.2007-337).
Citation: Qiu Xiaohui, Zhao Yang, Xie Shaojun, et al.A novel approach to conductive EMI noise source modeling[J].Journal of Southeast University(English Edition), 2009, 25(2):161-166.

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