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Weilharter B.,Institute for Electrical Drives and Machines | Weilharter B.,Chrstn Doppler Laboratory For Multiphysical Simulation | Biro O.,Institute for Fundamentals and Theory in Electrical Engineering | Lang H.,ELIN Motoren GmbH | Rainer S.,Institute for Fundamentals and Theory in Electrical Engineering
COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering | Year: 2011

Purpose - The purpose of this paper is to set up a comprehensive numerical approach to estimate the 3D structural vibration and noise radiation of an induction machine. Design/methodology/approach - The rotating force waves, acting in the air gap of an induction machine and obtained by an electromagnetic finite element multi-slice simulation, are applied to the 3D structural finite element model and a structural harmonic simulation is performed. The sound emission due to the vibration of the surface of the machine is computed with a 3D boundary element model. Findings - The paper outlays problematic issues when setting up the numerical models, i.e. The structural finite element model. The material properties strongly affect the structural behaviour and therefore the radiated noise. Originality/value - The 3D force distribution in the air gap and the resulting vibrations are computed. The structural behaviour, i.e. The different vibrational behaviour of stator and surface is discussed. The correlation of the structural vibrations and the noise radiation is investigated. © 2011 Emerald Group Publishing Limited. Source


Weilharter B.,University of Graz | Weilharter B.,Chrstn Doppler Laboratory For Multiphysical Simulation | Biro O.,University of Graz | Biro O.,Chrstn Doppler Laboratory For Multiphysical Simulation | And 3 more authors.
IEEE Transactions on Magnetics | Year: 2011

Investigations of the noise behavior of induction machines demand the calculation of the rotating force waves and thus the determination of the field-harmonics. The goal of this paper is to develop a method to compute the field-harmonics of a skewed induction machine using a multi-slice model. © 2011 IEEE. Source

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