A Technique for Calculating Voltages Induced on Twisted-Wire Pairs Using the FDTD Method

Tatematsu, Akiyoshi; Rachidi, Farhad; Rubinstein, Marcos

doi:10.1109/temc.2016.2604463

Cited by 27 publications

(18 citation statements)

References 16 publications

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“…Examples of radiated disturbances, where the longitudinal mode disturbances are dominant, can be seen in references [14,21,32], which deal with lightning-induced voltages; and in reference [33], which deal with voltages induced in twisted-wire pairs by a parallel wire excited by a voltage source.…”

Section: Interferences Produced By External Disturbancesmentioning

confidence: 99%

“…To show the generality of (34) and (35), we will compare (2)(3)(4)(5)(6)(7) and (2)(3)(4)(5), which are equivalent to (34) and (35), with the corresponding equations of reference [14]: -Neglecting the differences between the static magnetic potentials and the internally-produced magnetic potentials, the unbalanced current in the reference conductor, and if, from the externally applied electromagnetic field, only the externally impinging or incident electromagnetic field is considered, (2-7) reduce to (16) or (33) of reference [14]; -Neglecting the differences between the static magnetic potentials and the internally-produced magnetic potentials (the electrodynamics corrections (including radiation) mentioned in reference [13]), the non-linear conduction current I LS * , flowing out of the "j" conductor through the lateral surface, and assuming that the internally-produced line voltage is equal to the scattered line voltage, (2-5) almost reduce to (32) of reference [14]. The terms remaining in the right-hand side of (2-5) come from an assumption that is made here, which is different from the respective assumption made in reference [14]: The capacitance coefficients are here defined in the Maxwell's way, in terms of the scalar potentials in the conductors; while in reference [14] they are defined in terms of the scattered line voltages with respect to the reference conductor.…”

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confidence: 99%

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Conducted and Radiated Interference on Interconnection’s Lines

Munhoz-Rojas¹

2019

Adv. sci. technol. eng. syst. j.

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There exists a profound difficulty of communication between the people that works in the EMC area in circuit terms and the people that works in field terms. In this paper we show that when the matter is predominantly distributed along a certain direction in space, as for transmission lines, the electromagnetic field can be divided in two modes, each of them with two degrees of freedom, that are practically independent: a longitudinal TM (transverse magnetic) mode and a transversal TE (transverse electric) mode. We also show that two degrees of freedom of the longitudinal mode are the ones that are described by circuit's theory. This formulation is based on the observation that, when the matter is macroscopically described by constitutive laws, the electromagnetic field within the matter can be fully characterized in terms of the potential fields, in total four degrees of freedom. Using the above formulation, we put forward a generalized formulation of the coupling of an external electromagnetic field to a transmission line, valid in any time scale. We apply the above concepts to study, in a common theoretical framework, the iconic case of the conducted and radiated interferences on a transmission line, and we show that: 1-Differently than what is normally assumed in standard transmission-line theory, the normal operation mode and the internally-produced electromagnetic field are predominantly a longitudinal TM mode; 2-The longitudinal mode is affected by both the conducted disturbances and the radiated disturbances; while 3-The transverse mode is affected only by the radiated disturbances. Then, only for systems where the longitudinal mode is predominant, and, the longitudinal and the transversal modes are practically decoupled, EMI can be simulated using circuit simulation software's. Also, to further illustrate the interpretation power of this formulation, we present some other application examples.

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Section: Interferences Produced By External Disturbancesmentioning

confidence: 99%

mentioning

confidence: 99%

Conducted and Radiated Interference on Interconnection’s Lines

Munhoz-Rojas¹

2019

Adv. sci. technol. eng. syst. j.

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“…It is a large-scale problem because of (i) the scale of the solution domain, which can be in the order of several tens of kilometers, and (ii) the complexity of the propagation media, when considering the inhomogeneity and roughness of the soil (e.g., [17][18][19][20][21][22][23][24]). In most of the studies focused on the evaluation of lightning radiated electromagnetic fields and their induced disturbances on nearby structures, such as overhead transmission lines and buried cables (e.g., [25][26][27][28][29][30][31]), computations have been carried out by making use of CPU-based systems.…”

Section: Introductionmentioning

confidence: 99%

“…induced disturbances on nearby structures, such as overhead transmission lines and buried cables (e.g., [25][26][27][28][29][30][31]), computations have been carried out by making use of CPU-based systems. However, there exist several attempts in which different hardware platforms have been used for the same study (e.g., [32][33][34][35][36]).…”

Section: Introductionmentioning

confidence: 99%

On the Efficiency of OpenACC-aided GPU-Based FDTD Approach: Application to Lightning Electromagnetic Fields

et al. 2020

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An open accelerator (OpenACC)-aided graphics processing unit (GPU)-based finite difference time domain (FDTD) method is presented for the first time for the 3D evaluation of lightning radiated electromagnetic fields along a complex terrain with arbitrary topography. The OpenACC directive-based programming model is used to enhance the computational performance, and the results are compared with those obtained by using a CPU-based model. It is shown that OpenACC GPUs can provide very accurate results, and they are more than 20 times faster than CPUs. The presented results support the use of OpenACC not only in relation to lightning electromagnetics problems, but also to large-scale realistic electromagnetic compatibility (EMC) applications in which computation time efficiency is a critical factor.

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“…More recently, Pignari et al have carried out very effective studies on modeling field‐to‐wire coupling in bundles of TWP with different geometries, respectively. Because of the geometrical feature of TWP as well as TWP bundles, both analytical and numerical methods can be implemented for predicting their input‐output responses or crosstalk among them, while analytical or semianalytical approaches can save much time for simulating many TWPs in comparison with the commercial software FEKO…”

Section: Introductionmentioning

confidence: 99%

Modeling electromagnetic wave coupling and mode conversion effects in multitwisted bundle of twisted‐wire pairs (MTB‐TWP) above ground plane

Gassab

Zhou

Wang

et al. 2018

Int J Numerical Modelling

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A multiconductor transmission line (MTL) model is developed for predicting electromagnetic wave coupling effects with multitwisted bundle of twisted‐wire pairs (MTB‐TWP) running above a ground plane. Such MTB‐TWP is described as a sequential repeated structure, where all its parameters are formulated in terms of sequences. In particular, the parametric equations of all the wires are derived and described by a set of generalized equations, where the unit tangent vector for each wire is also determined analytically. In addition, the averaged per‐unit‐length (p.u.l.) parameters are described by recurrence formulas. Further, the equivalent voltages for describing the field‐to‐wire coupling of MTB‐TWP are obtained and determined analytically. The modal domain decomposition is performed with special loading terminals to split out the common mode (CM) and differential mode (DM) signals, where the CM‐to‐DM conversions are further investigated in order to indicate the balanced property in such MTB‐TWP system. On the other hand, the effect of dielectric coatings of all the wires is also characterized, where the averaged modal p.u.l. capacitance matrix is obtained numerically. A comparison is performed with the other wiring structures to visualize the benefits of our MTB‐TWP model. An extended MTL model is also validated in comparison with the commercial software FEKO.

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A Technique for Calculating Voltages Induced on Twisted-Wire Pairs Using the FDTD Method

Cited by 27 publications

References 16 publications

Conducted and Radiated Interference on Interconnection’s Lines

Conducted and Radiated Interference on Interconnection’s Lines

On the Efficiency of OpenACC-aided GPU-Based FDTD Approach: Application to Lightning Electromagnetic Fields

Modeling electromagnetic wave coupling and mode conversion effects in multitwisted bundle of twisted‐wire pairs (MTB‐TWP) above ground plane

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