基于低频部分元等效电路法的共地干扰
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摘要
基于低频部分元等效电路(PEEC)模型计算接地回路电流和电势分布,研究分析了共地传导干扰机理。基于混合位积分方程建立了低频PEEC模型,并与边界元方法的结果对比验证其准确性。基于PEEC模型实现对导体中三维电流分布的计算,获得了典型大导体接地回路的电流分布,分析了频率对电流分布的影响特性。结果表明,地导体中电流分布主要集中在接地极附近,两接地极间会由于电感感抗的影响而呈现出电势差,揭示了接地回路中的共地传导干扰机理,建立的PEEC模型能够有效应用于共地干扰分析与抑制。
Based on low-frequency partial element equivalent circuit(PEEC)method,the current and potential distribution of the ground loop is presented,and the mechanism of common ground conduction interference is analyzed in this paper.Our proposed low-frequency PEEC model is achieved based on mixed potential integral equation(MPIE),and its accuracy is verified by comparing with the results of boundary element method.By realizing the three-dimensional current distribution calculation with the PEEC model,the current distribution of a typical large conductor ground loop and the effects on the current distribution due to frequency are achieved.The results demonstrate that current distribution of ground conductor is mainly concentrated in the vicinity of the ground electrode,and a potential difference is observed between two ground electrodes because of the influence of inductance,which reveals the mechanism of common ground conduction interference in the ground loop.
Based on low-frequency partial element equivalent circuit(PEEC)method,the current and potential distribution of the ground loop is presented,and the mechanism of common ground conduction interference is analyzed in this paper.Our proposed low-frequency PEEC model is achieved based on mixed potential integral equation(MPIE),and its accuracy is verified by comparing with the results of boundary element method.By realizing the three-dimensional current distribution calculation with the PEEC model,the current distribution of a typical large conductor ground loop and the effects on the current distribution due to frequency are achieved.The results demonstrate that current distribution of ground conductor is mainly concentrated in the vicinity of the ground electrode,and a potential difference is observed between two ground electrodes because of the influence of inductance,which reveals the mechanism of common ground conduction interference in the ground loop.
引文
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[11]刘长军,黄卡玛,闫丽萍,等.电磁辐射作用于计算机主板的模拟及效应评估[J].强激光与粒子束,2006,18(5):847-852.(Liu Changjun,Huang Kama,Yan Liping,et al.Simulation and effect evaluation of electromagnetic radiation on computer motherboard.High Power Laser and Particle Beams,2006,18(5):847-852)
[12]何勇,陈德怀,林福昌,等.强激光脉冲电源电磁干扰的仿真与测试[J].强激光与粒子束,2005,17(6):921-924.(He Yong,Chen Dehuai,Lin Fuchang,et al.Simulation and measurement of electromagnetic interference in a pulsed supply of high power laser.High Power Laser and Particle Beams,2005,17(6):921-924)
[13]咸哲龙,钟玉林,孙旭东,等.用于传导EMI分析的接地回路模型与参数[J].中国电机工程学报,2005,25(7):156-161.(Xian Zhelong,Zhong Yulin,Sun Xudong,et al.Modelling and parameters of conducted EMI in a grounding plane.Proceedings of the CSEE,2005,25(7):156-161)
[14]钟玉林,咸哲龙,孙旭东,等.计及部分电容的接地回路高频电路模型[J].中国电机工程学报,2005,25(17):37-42.(Zhong Yulin,Xian Zhelong,Sun Xudong,et al.HF circuit model of conducted EMI of ground net based on PEEC.Proceedings of the CSEE,2005,25(17):37-42)
[2]程二威,陈亚洲,田庆民,等.无线电引信双源辐照效应研究[J].强激光与粒子束,2014,26:073219.(Cheng Erwei,Chen Yazhou,Tian Qingmin,et al.Effect of dual sources irradiation on a radio fuse.High Power Laser and Particle Beams,2014,26:073219)
[3]魏光辉,陈亚洲,孙永卫.微波辐照对无线电引信的影响与作用机理[J].强激光与粒子束,2005,17(1):88-92.(Wei Guanghui,Chen Yazhou,Sun Yongwei.Effects and effecting mechanism of microwave irradiation on the radio fuse.High Power Laser and Particle Beams,2005,17(1):88-92)
[4]陈斌,姜建国,孙旭东.PWM逆变器-感应电机驱动系统中接地电流EMI问题的分析[J].中国电机工程学报,2003,23(2):58-62.(Chen Bin,Jiang Jianguo,Sun Xudong.Analysis of EMI due to grounding current in a PWM inverter-induction motor drives system.Proceedings of the CSEE,2003,23(2):58-62)
[5]Ruehli A E,Heeb H.Circuit models for three-dimensional geometries including dielectrics[J].IEEE Trans Microwave Theory and Techniques,1992,40(7):1507-1516.
[6]Ruehli A E.Equivalent circuit models for three dimensional multi conductor system[J].IEEE Trans Microwave Theory and Techniques,1974,22(3):216-221.
[7]曾翔君,王兆安,基于局部元电路等效原理对混合封装电力电子集成模块内互感耦合的研究[J].中国电机工程学报,2004,24(7):134-139.(Zeng Xiangjun,Wang Zhaoan.Mutual inductance coupling research based on PEEC theory inside hybrid IPEM.Proceedings of the CSEE,2004,24(7):134-139)
[8]赵治华,马伟明.钢板地阻抗的频率特性[J].中国电机工程学报,2003,23(8):119-124.(Zhao Zhihua,Ma Weiming.Frequency characteristic of ground impedance for steel plane.Proceedings of the CSEE,2003,23(8):119-124)
[9]Ruehli A E,Brennan P A.Efficient capacitance calculations for three-dimensional multi conductor systems[J].IEEE Trans Microwave Theory and Techniques,1973:21(2):76-82.
[10]Ruehli A E.Nonorthogonal PEEC formulation for time and frequency domain EM and circuit modeling[J].IEEE Trans Electromagnetic Compatibility,2003,45(2):452-456.
[11]刘长军,黄卡玛,闫丽萍,等.电磁辐射作用于计算机主板的模拟及效应评估[J].强激光与粒子束,2006,18(5):847-852.(Liu Changjun,Huang Kama,Yan Liping,et al.Simulation and effect evaluation of electromagnetic radiation on computer motherboard.High Power Laser and Particle Beams,2006,18(5):847-852)
[12]何勇,陈德怀,林福昌,等.强激光脉冲电源电磁干扰的仿真与测试[J].强激光与粒子束,2005,17(6):921-924.(He Yong,Chen Dehuai,Lin Fuchang,et al.Simulation and measurement of electromagnetic interference in a pulsed supply of high power laser.High Power Laser and Particle Beams,2005,17(6):921-924)
[13]咸哲龙,钟玉林,孙旭东,等.用于传导EMI分析的接地回路模型与参数[J].中国电机工程学报,2005,25(7):156-161.(Xian Zhelong,Zhong Yulin,Sun Xudong,et al.Modelling and parameters of conducted EMI in a grounding plane.Proceedings of the CSEE,2005,25(7):156-161)
[14]钟玉林,咸哲龙,孙旭东,等.计及部分电容的接地回路高频电路模型[J].中国电机工程学报,2005,25(17):37-42.(Zhong Yulin,Xian Zhelong,Sun Xudong,et al.HF circuit model of conducted EMI of ground net based on PEEC.Proceedings of the CSEE,2005,25(17):37-42)