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Generalized Electric Field Equations of a Time-Varying Current Distribution Based on the Electromagnetic Fields of Moving and Accelerating Charges
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Elektricitetslära.
Karolinska Inst, Dept Neurophysiol, S-17177 Solna, Sweden.
Univ Appl Sci Western Switzerland, HEIG VD, CH-1401 Yverdon, Switzerland.
Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Electromagnet Compatibil Lab, CH-1015 Lausanne, Switzerland.
2019 (engelsk)Inngår i: Atmosphere, ISSN 2073-4433, E-ISSN 2073-4433, Vol. 10, nr 7, artikkel-id 367Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In several studies conducted recently, it was shown that equations pertinent to the electric and magnetic fields produced by electrical charges in motion can be used to calculate the electromagnetic fields produced by current pulses propagating along linearly restricted paths. An example includes the case of current pulses propagating along conductors and conducting channels such as lightning. In this paper, it is shown how the technique can be applied to estimate the electromagnetic fields generated by current and charge distributions moving in arbitrary directions in space. The analysis shows that, depending on the way the problem is formulated using the field equations pertinent to accelerating charges, one procedure leads to the generalized dipole equations, which are independent of the velocity of propagation of the current, and the other procedure leads to a set of equations that depend on the velocity. Using the well-tested transmission line model of lightning return strokes as an example, it is shown that both sets of field equations give rise to the same total electromagnetic field.

sted, utgiver, år, opplag, sider
MDPI , 2019. Vol. 10, nr 7, artikkel-id 367
Emneord [en]
lightning, electromagnetic fields, radiation fields, accelerating charges
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-393527DOI: 10.3390/atmos10070367ISI: 000480628300019OAI: oai:DiVA.org:uu-393527DiVA, id: diva2:1354177
Forskningsfinansiär
Swedish Research Council, VR-2015-05026Tilgjengelig fra: 2019-09-24 Laget: 2019-09-24 Sist oppdatert: 2019-09-24bibliografisk kontrollert

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