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Computation of the turbogenerator end-region field using the BEM

Berechnung des Turbogenerator-Stirnraumfeldes mit der Rand-Elemente-Methode

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Contents

The Boundary Element Method has been adapted to the 2D electromagnetic field analysis in the piece-wise homogeneous regions described by the Laplace, Poisson and Helmholtz partial differential equations. Two subregions described by the Helmholtz equation have been introduced. The axial component of the magnetic flux density on the surface of turbogenerator end laminations has been calculated using the above approach. The copper electromagnetic shield is placed between the clamping ring and pressure fingers in the afore-mentioned turbogenerator and the conducting elements has been considered as the Helmholtz subregions. The numerical results have been compared with measured ones.

Übersicht

Die Rand-Elemente-Methode wurde zur Berechnung des zwei-dimensionalen Feldes in dem abschnittsweise homogenen Raum angewendet, der mit den Laplaceschen, Poissonschen und Helmholtzschen partiellen Differentialgleichungen beschrieben wird. Zwei mit der Helmholtzgleichung beschriebene Untergebiete wurden eingeführt. Die axiale Komponente der magnetischen Flußdichte (Induktion) auf der Oberfläche der Stirnbleche eines Turbogenerators wurde mit Hilfe der obengenannten Methode berechnet. Ein zwischen dem Preßring und den Andruckfingern sich befindender elektromagnetischer Kupferschirm wird in dem obenerwähnten Turbogenerator angewendet und die konduktiven Elemente wurden als Helmholtzsche Untergebiete betrachtet. Die numerischen Ergebnisse wurden mit gemessenen Werten verglichen.

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Krajewski, W. Computation of the turbogenerator end-region field using the BEM. Archiv f. Elektrotechnik 75, 173–178 (1992). https://doi.org/10.1007/BF01574321

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