屏蔽腔內任意高度線纜端接TVS管電路的電磁耦合時域分析

葉志紅; 周海京; 劉強

doi:10.11999/JEIT170615

屏蔽腔內任意高度線纜端接TVS管電路的電磁耦合時域分析

doi: 10.11999/JEIT170615 cstr: 32379.14.JEIT170615

1.
(重慶郵電大學通信與信息工程學院重慶 400065)
2.
(北京應用物理與計算數(shù)學研究所北京 100094)

基金項目:

重慶市教委科學技術研究項目(KJ1704082)，重慶郵電大學博士啟動基金(A2016-88)

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出版歷程
- 收稿日期: 2017-06-27
- 修回日期: 2017-12-04
- 刊出日期: 2018-04-19

Time Domain Coupling Analysis for the Arbitrary Height Cable Terminated with TVS Circuit in Shield Cavity

1.
(School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)
2.
(Institute of Applied Physics and Computational Mathematics, Beijing 100094, China)
3.
(Institute of Applied Physics and Computational Mathematics, Beijing 100094, China)

Funds:

The Science and Technology Research Program of Chongqing Municipal Education Commission (KJ1704082), The Doctor Start-up Funding of Chongqing University of Posts and Telecommunications (A2016-88)

摘要

摘要: 該文基于時域有限差分(FDTD)方法和傳輸線方程，結合插值技術和牛頓迭代法，提出一種新的時域混合算法，能夠快速模擬屏蔽腔內任意高度線纜端接瞬態(tài)電壓抑制(TVS)管電路的電磁耦合問題，并實現(xiàn)空間電磁場與線纜和電路瞬態(tài)響應的同步計算。該算法首先利用FDTD方法結合STL網(wǎng)格剖分技術實現(xiàn)屏蔽腔結構的快速建模以及腔體內空間電磁場分布的準確模擬。然后利用傳輸線方程結合插值技術建立腔體內線纜的場線耦合模型，結合FDTD方法，迭代求解出線纜上的電壓和電流響應。對于線纜端接的TVS管電路，列寫電壓電流方程，采用牛頓迭代法計算得到電路端口的電壓響應。通過與電磁仿真軟件的計算結果進行對比，驗證了所提時域混合算法的正確性。研究表明，該算法能夠很好地應用于屏蔽腔內線纜端接負載的TVS管限幅防護設計。
- FDTD方法 /
- 傳輸線方程 /
- 牛頓迭代法 /
- 任意高度線纜 /
- 瞬態(tài)電壓抑制管電路
Abstract: This paper presents a novel time domain hybrid method consisting of Finite Difference Time Domain (FDTD) method, Transmission Line (TL) equation, interpolation technique, and Newton iteration method for the coupling simulation of the arbitrary height cable terminated with TVS circuit in shield cavity rapidly. It can achieve a strong synergism computation of electromagnetic field and the responses of the cable and the circuit. The hybrid method uses FDTD method combined with the STL mesh generator technique to model the enclosure of the cavity rapidly and simulate the electromagnetic field distribution in the cavity accurately. The TL equation with interpolation technique is used to set up the coupling model of the cable in the cavity. Then the FDTD method is used to discrete the TL equation to obtain the transient voltage and current responses on the cable. The current-voltage equations are used for the analysis of the TVS circuit. Then the Newton iteration method is utilized to solve the current-voltage equations to obtain the voltage responses on the TVS. The correctness of the hybrid method is confirmed by comparing with the results obtained by electromagnetic simulation software. In testing, the hybrid method can be well applied to the limiting protection design of the loads in the terminal of the cable in shield cavity.
- Finite Difference Time Domain (FDTD) method /
- Transmission Line (TL) equation /
- Newton iteration method /
- Arbitrary height cable /
- Transient Voltage Suppressor (TVS) circuit

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