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Filter Influence on Rotor Losses in Coreless Axial Flux Permanent Magnet MachinesSANTIAGO, J.   , OLIVEIRA, J. G. , BERNHOFF, H. |
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Author keywords
Eddy currents, harmonic filters, permanent magnet machines, power filters, permanent magnets synchronous machine, slotless machines
References keywords
permanent(9), motor(8), magnet(8), machines(6), synchronous(4), rotor(4), inverter(4), high(4), energy(4)
Blue keywords are present in both the references section and the paper title.
About this article
Date of Publication: 2013-02-28
Volume 13, Issue 1, Year 2013, On page(s): 81 - 86
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2013.01014
Web of Science Accession Number: 000315768300014
SCOPUS ID: 84875314441
Abstract
This paper investigates the eddy current losses induced in the rotor of coreless Axial-Flux machines. The calculation of eddy currents in the magnets requires the simulation of the inverter and the filter to obtain the harmonic content of the stator currents and FEM analysis of the magnets in the rotor. Due to the low inductance in coreless machines, the induced eddy current losses in the rotor remain lower than in traditional slotted machines. If only machine losses are considered, filters in DC/AC converters are not required in machines with wide airgaps as time harmonic losses in the rotor are very low.The harmonic content both from simulations and experimental results of a DC/AC converter are used to calculate the eddy currents in the rotor magnets. The properties of coreless machine topologies are investigated and some simplifications are proposed for time efficient 3D-FEM analysis. The time varying magnetic field can be considered constant over the magnets when the pole is divided in several magnets.The simplified FEM method to calculate eddy current losses is applicable to coreless machines with poles split into several magnets, although the conclusions are applicable to all coreless and slotless motors and generators. |
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[1] Permanent magnet working point ripple in synchronous generators, Sjökvist, Stefan, Rossander, Morgan, Eriksson, Sandra, The Journal of Engineering, ISSN 2051-3305, Issue 5, Volume 2017, 2017.
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[2] Practical Aspects of the Skin Effect in Low Frequencies in Rectangular Conductors, Cabral, Sergio H. L., Bertoli, Savio L., Medeiros, Alessandro, Hillesheim, Crisleine Regina, De Souza, Carolina K., Stefenon, Stefano Frizzo, Nied, Ademir, Leithardt, Valderi Reis Quietinho, Gonzalez, Gabriel Villarrubia, IEEE Access, ISSN 2169-3536, Issue , 2021.
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
All rights reserved: Advances in Electrical and Computer Engineering is a registered trademark of the Stefan cel Mare University of Suceava. No part of this publication may be reproduced, stored in a retrieval system, photocopied, recorded or archived, without the written permission from the Editor. When authors submit their papers for publication, they agree that the copyright for their article be transferred to the Faculty of Electrical Engineering and Computer Science, Stefan cel Mare University of Suceava, Romania, if and only if the articles are accepted for publication. The copyright covers the exclusive rights to reproduce and distribute the article, including reprints and translations.
Permission for other use: The copyright owner's consent does not extend to copying for general distribution, for promotion, for creating new works, or for resale. Specific written permission must be obtained from the Editor for such copying. Direct linking to files hosted on this website is strictly prohibited.
Disclaimer: Whilst every effort is made by the publishers and editorial board to see that no inaccurate or misleading data, opinions or statements appear in this journal, they wish to make it clear that all information and opinions formulated in the articles, as well as linguistic accuracy, are the sole responsibility of the author.
