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Simulation of wave propagation effects in machine windings

Simulation of wave propagation effects in machine windings Purpose – The purpose of this paper is to offer a simulation method for predicting the impedance of machine windings at higher frequencies. Design/methodology/approach – A transmission‐line model (TLM) is developed based on parameters calculated on the basis of electroquasistatic and magnetoquasistatic finite‐element (FE) model of the winding cross‐section. Findings – The FE formulations for the low‐ and high‐frequency limits give acceptable results for the respective frequency ranges. An eddy‐current formulation is only accurate on a broader region when the FE mesh is sufficiently fine to resolve the skin depth. Research limitations/implications – The paper is restricted to frequency‐domain simulations. Practical implications – The results of the paper improve the understanding of higher‐frequency parasitic effects in electrical drives with long windings. Originality/value – The paper shows the limitations of the FE methods used for determining the parameters of the TLMs and remedies to avoid these. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Emerald Publishing

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Publisher
Emerald Publishing
Copyright
Copyright © 2010 Emerald Group Publishing Limited. All rights reserved.
ISSN
0332-1649
DOI
10.1108/03321641011007948
Publisher site
See Article on Publisher Site

Abstract

Purpose – The purpose of this paper is to offer a simulation method for predicting the impedance of machine windings at higher frequencies. Design/methodology/approach – A transmission‐line model (TLM) is developed based on parameters calculated on the basis of electroquasistatic and magnetoquasistatic finite‐element (FE) model of the winding cross‐section. Findings – The FE formulations for the low‐ and high‐frequency limits give acceptable results for the respective frequency ranges. An eddy‐current formulation is only accurate on a broader region when the FE mesh is sufficiently fine to resolve the skin depth. Research limitations/implications – The paper is restricted to frequency‐domain simulations. Practical implications – The results of the paper improve the understanding of higher‐frequency parasitic effects in electrical drives with long windings. Originality/value – The paper shows the limitations of the FE methods used for determining the parameters of the TLMs and remedies to avoid these.

Journal

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic EngineeringEmerald Publishing

Published: Jan 1, 2010

Keywords: Finite element analysis; Electric machines; Wave propagation; Modelling; Windings

References