Finite-Element Simulation of the Common-Mode Flux in Inverted-Fed Induction Machines

Conference: CEM 2006 - 6th International Conference on Computational Electromagnetics
04/04/2006 - 04/06/2006 at Aachen, Germany

Proceedings: CEM 2006

Pages: 2Language: englishTyp: PDF

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Gersem, H. De; Weiland, T. (Institut für Theorie Elektromagnetischer Felder, Technische Universität Darmstadt, Germany)
Muetze, A. (Department of Electrical and Computer Engineering, University of Wisconsin-Madison, USA)
Binder, A. (Institut für Elektrische Energiewandlung, Technische Universität Darmstadt, Germany)

This paper deals with the modelling by finite elements of a particular phenomenon in inverter-fed induction machines. A fast-switching inverter introduces a common-mode voltage at higher frequencies which leads to a capacitive coupling between stator windings and stator laminations. As a consequence, a current path arises which closes through the winding isolation, stator lamination and housing. The common-mode flux coupled to this current gives rise to secondary phenomena such as e.g. circulating bearing currents which may damage the drive.