Effect of shielding on electromagnetic crosstalk in double differential mode cable loop
-
摘要: 屏蔽层在抑制电磁干扰应用中被广泛使用，但目前少有研究聚焦于屏蔽层对独立的功率回路与信号回路构成的双差模回路间电磁串扰的影响。提出了一种基于多导体传输线理论的双差模带屏蔽线缆回路间的串扰分析模型。该方法首先建立了多导体系统单位长度等效电路模型，然后利用有限差分的思想并依据基尔霍夫电压定律和电流定律列写出系统的传输线方程组，最后求解得到串扰结果。将计算结果与CST软件仿真结果进行对比，验证了该模型和计算方法的可行性与有效性。对感性耦合和容性耦合进行单独计算，研究了屏蔽层对线缆间串扰的影响，得到了抑制串扰的方法，可为实际应用中电缆选型以及屏蔽层接地方式的选择提供指导。Abstract: Shields are widely used in EMC applications because they can realize electromagnetic shielding, but few studies have focused on the effect of shields on electromagnetic crosstalk in a double differential mode loop, consisting of independent power loop and signal loop. A crosstalk analysis model based on the theory of multi-conductor transmission lines is proposed. In this method, the per-unit-length equivalent circuit model of the system is established, then the transmission line equations of the system are written by using the idea of finite difference and Kirchhoff’s voltage law and current law, and the crosstalk results are obtained finally. The crosstalk results are compared with the simulation results obtained by CST software to verify the feasibility and validity of the model and calculation method. Separate calculations of inductive coupling and capacitive coupling are carried out to study the effect of shielding layer on electromagnetic crosstalk between cables, and crosstalk suppression methods are obtained, which can provide guidance for the selection of cables and the selection of shield grounding method in practical engineering applications.
-
图 1 无屏蔽功率电缆-带屏蔽信号电缆系统线缆分布示意图
Figure 1. Diagram of cable distribution for unshielded power cables and shielded signal cables system
图 2 无屏蔽功率电缆-带屏蔽信号电缆的七导体传输线系统等效电路模型
Figure 2. Equivalent circuit model of a seven-conductor transmission line system for the unshielded power cables and shielded signal cables system
图 3 无屏蔽功率电缆-带屏蔽信号电缆系统的线缆截面分布
Figure 3. Distribution of cable cross sections for the unshielded power cables and shielded signal cables system
图 4 无屏蔽功率电缆-带屏蔽信号电缆系统MATLAB与CST仿真结果对比
Figure 4. Comparison of MATLAB and CST simulation results for the unshielded power cables and shielded signal cables system
图 5 无屏蔽功率电缆-带屏蔽信号电缆系统不同屏蔽层接地方式下的感性和容性耦合系数
Figure 5. Inductive and capacitive coupling coefficients for the unshielded power cables and shielded signal cable system under different shield grounding methods
图 6 无屏蔽功率电缆-带屏蔽信号电缆系统不同屏蔽层接地方式下的总串扰
Figure 6. Total crosstalk for the unshielded power cables and shielded signal cable system under different shield grounding methods
图 7 带屏蔽功率电缆-无屏蔽信号电缆的七导体传输线系统分布示意图
Figure 7. Distribution of the seven-conductor transmission line system for a shielded power cables and unshielded signal cables system
图 8 带屏蔽功率电缆-无屏蔽信号电缆系统MATLAB 与CST仿真结果对比
Figure 8. Comparison of MATLAB and CST simulation results for the shielded power cables and unshielded signal cables system
图 9 带屏蔽功率电缆-无屏蔽信号电缆系统不同屏蔽层接地方式下的感性和容性耦合系数
Figure 9. Inductive and capacitive coupling coefficients for the shielded power cables and unshielded signal cables system under different shield grounding methods
图 10 带屏蔽功率电缆-无屏蔽信号电缆系统不同屏蔽层接地方式下的总串扰
Figure 10. Total crosstalk for a shielded power cables and unshielded signal cables system under different shield grounding methods
图 11 带屏蔽功率电缆-带屏蔽信号电缆的九导体传输线系统分布示意图
Figure 11. Distribution of the seven-conductor transmission line system for the shielded power cables and shielded signal cables system
图 12 带屏蔽功率电缆-带屏蔽信号电缆系统MATLAB与CST仿真结果对比
Figure 12. Comparison of MATLAB and CST simulation results for the shielded power cables and shielded signal cables system
图 13 带屏蔽功率电缆-带屏蔽信号电缆系统不同屏蔽层接地组合方式下的串扰
Figure 13. Crosstalk for the shielded power cables and shielded signal cables system under different shield grounding methods
-
[1] 赵斌, 贾智, 王东, 等. 电气化铁路轨道电路钢轨互阻抗计算研究[J]. 铁道学报, 2021, 43(8):54-61Zhao Bin, Jia Zhi, Wang Dong, et al. Research on calculation of mutual impedance of rails in electrified railway track circuits[J]. Journal of the China Railway Society, 2021, 43(8): 54-61 [2] 崔勇, 黄鑫, 杨晓凡. 基于多端口网络理论及矩量法的电缆串扰研究[J]. 铁道学报, 2022, 44(2):49-55Cui Yong, Huang Xin, Yang Xiaofan. Research on cable crosstalk based on multiport network theory and MoM[J]. Journal of the China Railway Society, 2022, 44(2): 49-55 [3] Zhang Dan, Wen Yinghong, Wang Yansheng, et al. Coupling analysis for wires in a cable tray using circuit extraction based on mixed-potential integral equation formulation[J]. IEEE Transactions on Electromagnetic Compatibility, 2017, 59(3): 862-872. doi: 10.1109/TEMC.2016.2626310 [4] 方举昊, 陈健, 颜伟, 等. 基于时域有限差分的传输线串扰方法研究[J]. 南京师范大学学报(工程技术版), 2020, 20(3):22-26,70Fang Juhao, Chen Jian, Yan Wei, et al. Research on transmission crosstalk method based on finite difference time domain method[J]. Journal of Nanjing Normal University (Engineering and Technology Edition), 2020, 20(3): 22-26,70 [5] Sridevi R, Sekhar P C, Madhavi B K, et al. FDTD modeling for crosstalk reduction in coupled RLC interconnects with active shielding[J]. International Journal of Innovative Technology and Exploring Engineering, 2019, 8(11): 1038-1042. doi: 10.35940/ijitee.J1100.0981119 [6] 杨承潘. 基于FDTD算法的多导体传输线串扰研究[D]. 南京: 南京师范大学, 2020Yang Chengpan. Research on multi-conductor transmission line crosstalk based on FDTD[D]. Nanjing: Nanjing Normal University, 2020 [7] Paul C R. Introduction to electromagnetic compatibility[M]. 2nd ed. Hoboken: Wiley, 2006. [8] Paul C R, Bowles B A. Symbolic solution of the multiconductor transmission-line equations for lines containing shielded wires[J]. IEEE Transactions on Electromagnetic Compatibility, 1991, 33(3): 149-162. doi: 10.1109/15.85128 [9] 方举昊. 基于多导体传输线理论的传输线串扰方法研究[D]. 南京: 南京师范大学, 2021Fang Juhao. Research on transmission line crosstalk method based on multi-conductor transmission line theory[D]. Nanjing: Nanjing Normal University, 2021 [10] 王倩营, 卢俊文, 周超. 基于TLM的传输线串扰影响因素研究[J]. 机车电传动, 2021(4):146-152Wang Qianying, Lu Junwen, Zhou Chao. Research of transmission line crosstalk influence factors based on TLM[J]. Electric Drive for Locomotives, 2021(4): 146-152 [11] 张丹. 高速动车组电磁兼容预测建模方法及其应用研究[D]. 北京: 北京交通大学, 2017Zhang Dan. Research on the predicting modeling method of electromagnetic compatibility and its application for EMUs[D]. Beijing: Beijing Jiaotong University, 2017 [12] Paul C R. Analysis of multiconductor transmission lines[M]. 2nd ed. Hoboken: Wiley, 2008. [13] Paul C R. Solution of the transmission-line equations for three-conductor lines in homogeneous media[J]. IEEE Transactions on Electromagnetic Compatibility, 1978, EMC-20(1): 216-222. doi: 10.1109/TEMC.1978.303651 [14] 王强, 沙斐. 平行双线串扰的分析[J]. 电子测量与仪器学报, 2008, 22(6):75-77,86Wang Qiang, Sha Fei. Analysis of crosstalk of two parallel transmission lines[J]. Journal of Electronic Measurement and Instrumentation, 2008, 22(6): 75-77,86 [15] Vance E F. Coupling to shielded cables[M]. New York: Wiley, 1978. [16] Demoulin B, Degauque P, Cauterman M, et al. Shielding performance of triply shielded coaxial cables[J]. IEEE Transactions on Electromagnetic Compatibility, 1980, EMC-22(3): 173-180. doi: 10.1109/TEMC.1980.303877 [17] 崔勇, 杨世武, 刘志明, 等. 铁路信号电缆屏蔽及接地方式的研究分析[J]. 铁道学报, 2017, 39(11):77-82Cui Yong, Yang Shiwu, Liu Zhiming, et al. Research on shielding and earthing methods of railway signal cables[J]. Journal of the China Railway Society, 2017, 39(11): 77-82 [18] 崔勇, 黄鑫, 杨晓凡. 电缆槽对电缆间串扰的影响研究[J]. 北京交通大学学报, 2021, 45(5):108-115,123Cui Yong, Huang Xin, Yang Xiaofan. Research on the influence of cable trough on crosstalk between cables[J]. Journal of Beijing Jiaotong University, 2021, 45(5): 108-115,123 [19] 谢路雨. 多芯信号电缆束的串扰分析及串扰防护措施研究[D]. 北京: 北京交通大学, 2023Xie Luyu. Research on crosstalk in signal cable bundles and protection measures[D]. Beijing: Beijing Jiaotong University, 2023 [20] 彭宁, 杨勇, 张明, 等. 双差模非屏蔽线缆回路的电磁串扰研究[J]. 强激光与粒子束, 2024, 36:025017 doi: 10.11884/HPLPB202436.230228Peng Ning, Yang Yong, Zhang Ming, et al. Research on electromagnetic crosstalk in double differential mode unshielded cable loop[J]. High Power Laser and Particle Beams, 2024, 36: 025017 doi: 10.11884/HPLPB202436.230228 -
下载:
点击查看大图
计量
- 文章访问数: 135
- HTML全文浏览量: 56
- PDF下载量: 26
- 被引次数: 0
