A Time-Domain Three-Dimensional Numerical Method for Comprehensive Common-Mode Analysis of Electric Circuits in Inhomogeneous Media
A Time-Domain Three-Dimensional Numerical Method for Comprehensive Common-Mode Analysis of Electric Circuits in Inhomogeneous Media
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DOI：
10.1109/temc.2022.3199473
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发表时间：
2022-12
影响因子：
2.1
通讯作者：
S. Jinno;S. Kitora;Hiroshi Toki;M. Abe
中科院分区：
文献类型：
--
作者：
S. Jinno;S. Kitora;Hiroshi Toki;M. Abe
本文提出了一种时域综合共模（CM）信号的数值处理方法，该信号是电子电气设备中的电磁噪声源。电磁势是量化CM信号的较好选择，因为我们可以很容易地扩展多导体系统的全波分析。我们从非均匀介质（包括导体和介电体）中的麦克斯韦方程出发，表达了电磁势的波动方程。本文还介绍了一种基于中心差分法的跳跃格式的集总参数电路波动方程的数值求解方法。利用时域反射法计算了具有不连续和非均匀性的差分电路的正模电压和CM电压，并进行了实验。将该方法的数值计算结果与时域有限差分法的计算结果进行了比较，并进行了验证实验，在不连续和非均匀性处观测NM和CM的转换和反射，结果吻合良好。
This article presents a numerical method to treat comprehensive common-mode (CM) signals in the time domain, which are electromagnetic noise sources in electrical and electronic devices. Electromagnetic potentials are a better choice to quantify the CM signals because we can easily extend the full-wave analysis of a multiconductor system. We start with the Maxwell equations in inhomogeneous media, which include conductors and dielectrics, and express the wave equations of the electromagnetic potentials. We also introduce a numerical method for the wave equations with lumped-parameter circuits by using the leap-frog scheme based on the central difference method. We calculate normal-mode (NM) and CM voltages in differential circuits with discontinuity and nonuniformity and conduct experiments by using the time-domain reflectometry method. The numerical results of the proposed method are compared with results from the finite-difference time-domain method and experiments for validation, observing conversions and reflections of NM and CM at discontinuities and nonuniformity, and show good agreements among these results.