Asymmetry in bus bars due to proximity effects

Biringer, P.P.

doi:10.1063/1.344816

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…It was shown in the work that the magnetic field distribution in two external conductors of the three-phase flat shielded high-current busduct is not equal in spite of symmetry [9] of the system geometry.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field asymmetry at external phases of shielded single-pole three-phase flat high-current busduct

2019

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The article shows the total magnetic field distribution in two outer conductors of the flat, threephase single-pole shielded, high-current busduct is asymmetric. The phase currents in the shielded conductors decide about the magnetic field of such a high-current busduct. The components of this field reflect the magnetic field of the reverse reaction fields of the eddy currents induced in the conductors of the adjacent phases as the results of the proximity effect and the skin effect. The field distribution is shown in the outer area of the outer phases as the function of the parameters reflecting the current frequency, the conductivity, and the transverse dimensions of the tubular conductors.

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Section: Introductionmentioning

confidence: 99%

Magnetic field asymmetry at external phases of shielded single-pole three-phase flat high-current busduct

2019

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“…Some other methods for solving the problem of current distribution are possible, such as boundary integral equation formulation [10,11], modal functions [12], differential equation approach in terms of the magnetic vector potential [13 ÷ 16], etc.…”

Section: Introductionmentioning

confidence: 99%

Integral equation approach for proximity effect in a line constituted by two solid conductors of circular cross section

Dlabač

2015

Teh. vjesn.

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Preliminary notesThis paper presents an analysis of the proximity effect in a line consisting of two identical solid conductors of circular cross section. Integral equation for the current distribution in one of the conductors is solved approximately by assuming the current density in the form of a finite double polynomial series and by applying the point matching procedure. The current distribution obtained by the presented method has been checked by implementing the FEMM 4.0 software package. Also, the a.c. to d.c. resistance ratio is calculated and the results are compared to the available ones, and a good agreement is exhibited. Keywords: a.c. to d.c. resistance ratio; circular cross section conductors; current distribution; proximity effect Metoda integralnih jednadžbi za analizu efekta blizine u dvožičnom vodu s kružnim vodičimaPrethodno priopćenje U ovom radu predstavljena je analiza efekta blizine u vodu sastavljenom od dva identična vodiča kružnog poprečnog presjeka. Integralna jednadžba za raspodjelu gustoće struje u jednom od vodiča riješena je približno uzimajući da je gustoća struje u obliku konačnog dvojnog stupanjskog reda s nepoznatim koeficijentima koji su određeni metodom podešavanja u točkama. Raspodjela struje dobivena prikazanom metodom provjerena je uporabom softverskog paketa FEMM 4.0. Također, izračunat je omjer otpornosti pri izmjeničnoj i istosmjernoj struji, a rezultat je pokazao dobro poklapanje s raspoloživim rezultatima.Ključne riječi: omjer otpornosti pri izmjeničnoj i istosmjernoj struji; provodnici kružnog poprečnog presjeka; raspodjela struje; efekt blizine

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Thermal expansion coefficient of hydrogenated amorphous carbon

Marques

Lacerda

Champi

et al. 2003

Applied Physics Letters

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The coefficient of thermal expansion (CTE) of hydrogenated amorphous carbon (a-C:H) was investigated as a function of the concentration of sp2 hybridization. The CTE, determined using the thermally induced bending technique, depends on the concentration of sp2 bonded carbon, increasing to the value of graphite as the sp2 concentration approaches 100%. By using a combination of the thermally induced bending technique and nanohardness measurements, we extract separately the Young’s modulus and Poisson’s ratio of the a-C:H films as function of the sp2 concentration.

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Asymmetry in bus bars due to proximity effects

Cited by 5 publications

References 1 publication

Magnetic field asymmetry at external phases of shielded single-pole three-phase flat high-current busduct

Magnetic field asymmetry at external phases of shielded single-pole three-phase flat high-current busduct

Integral equation approach for proximity effect in a line constituted by two solid conductors of circular cross section

Thermal expansion coefficient of hydrogenated amorphous carbon

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