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Archives of Electrical Engineering

The Journal of Polish Academy of Sciences

4 Issues per year


CiteScore 2016: 0.71

SCImago Journal Rank (SJR) 2016: 0.238
Source Normalized Impact per Paper (SNIP) 2016: 0.535

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Online
ISSN
2300-2506
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Influence of the mechanical fatigue progress on the magnetic properties of electrical steel sheets

Jan Karthaus
  • Corresponding author
  • RWTH Aachen University, Institute of Electrical Machines Schinkelstr. 4, 52062 Aachen, Germany
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Simon Steentjes
  • RWTH Aachen University, Institute of Electrical Machines Schinkelstr. 4, 52062 Aachen, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Daniel Gröbel / Kolja Andreas / Marion Merklein / Kay Hameyer
  • RWTH Aachen University, Institute of Electrical Machines Schinkelstr. 4, 52062 Aachen, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-06-09 | DOI: https://doi.org/10.1515/aee-2017-0026

Abstract

The purpose of this paper is to study the variation of the magnetic properties of non-oriented electrical steel sheets with the fatigue state during cyclic mechanical loading. The obtained results are central to the design of variable drives such as traction drives in electric vehicles in which varying mechanical loads, e.g. in the rotor core (centrifugal forces), alter the magnetic properties. Specimens of non-oriented electrical steel are subject to a cyclically varying mechanical tensile stress with different stress amplitudes and number of cycles. The specimens are characterised magnetically at different fatigue states for different magnetic flux densities and magnetising frequencies. The measurements show a variation in magnetic properties depending on the number of cycles and stress magnitude which can be explained by changes in the material structure due to a beginning mechanical fatigue process. The studied effect is critical for the estimation of the impact of mechanical material fatigue on the operational behaviour of electrical machines. Particularly in electrical machines with a higher speed where the rotor is stressed by high centrifugal forces, material fatigue occurs and can lead to deterioration of the rotor’s stack lamination.

Keywords: Cyclic mechanical stress; electrical machines; electrical steel sheets; magnetic properties; material fatigue

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About the article

Received: 2016-09-23

Revised: 2017-01-18

Published Online: 2017-06-09

Published in Print: 2017-06-27


Citation Information: Archives of Electrical Engineering, ISSN (Online) 2300-2506, DOI: https://doi.org/10.1515/aee-2017-0026.

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© Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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