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Coupled FEM and lumped circuit model of the electromagnetic response of coaxially insulated windings in two slot cores
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Economics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. (Elektricitetslära)
2007 (English)In: European transactions on electrical power, ISSN 1430-144X, E-ISSN 1546-3109, Vol. 17, no 6, 554-568 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents a coupled FEM and lumped circuit modelling approach that is primarily intended for high-frequency and overvoltage simulations of rotating electric machines with coaxially insulated windings, such as Powerformer and Motorformer. The magnetic fields and their interaction with the conductors of the winding are simulated with the aid of a FEM-program. The displacement current and its losses are modelled with an external lumped circuit. To consider eddy current losses, the stranded conductors and the laminated steel cores are replaced by homogeneous bodies with similar losses over a wide frequency range. The approach is illustrated and experimentally verified for a set-up with a cable wound around two slot cores. The model agrees well with measurements up to 1 MHz.

Place, publisher, year, edition, pages
2007. Vol. 17, no 6, 554-568 p.
Keyword [en]
high-frequency model, overvoltages, transient response, rotating electric machines, circuit modelling, finite element method
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-13984DOI: 10.1002/etep.145ISI: 000251013600002OAI: oai:DiVA.org:uu-13984DiVA: diva2:41754
Available from: 2008-04-25 Created: 2008-04-25 Last updated: 2011-01-17Bibliographically approved

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Holmberg, PärLeijon, Mats
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