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Low-loss FeSi sheet for energy-efficient electrical drives

1 TU Berg Bergakademie Freiberg, Institute of Metal Forming (IMF), Bernhard-von-Cotta-Straße 4, D-09599 Freiberg, Germany
2 RWTH Aachen University, Institute of Metal Forming (IBF), Intzestraße 10, D-52056 Aachen, Germany
3 RWTH Aachen University, Institute of Physical Metallurgy and Metal Physics (IMM), Kopernikusstraße 14, D-52074 Aachen, Germany
4 TU München, Institute of Metal Forming and Casting (utg), Walther-Meißner-Straße 4, 85748 Garching, Germany
5 RWTH Aachen University, Institute of Electrical Machines (IEM), Schinkelstraße 4, D-52056 Aachen, Germany

Topical Section: Materials Processing

The properties of the lamination of rotating electrical machines made of non-grain oriented electrical steel are the key factor for the efficiency of electric drives. Therefore, low losses and high magnetization over the entire polarization and frequency spectrum are the aim of research activities in the field of NGO steel production and processing. Structural features of the electrical steel like microstructure and texture, lamination thickness, and residual stresses affect the magnetic properties. During the production and processing of non-grain oriented electrical steels, several effects control the microstructure and texture. Moreover, several interdependencies between the parameters of the production and processing steps and the magnetic properties are existing. This paper gives an overview of a joint research project made up of an interdisciplinary team of researcher from the fields of materials engineering, production technology and electrical engineering from five different institutes at three universities. The research focuses and selected results are presented, showing important interactions along the production route of non-grain oriented electrical steels containing 2.4 wt% Si.
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Keywords non oriented electrical steel; texture; magnetization; hot rolling; cold rolling; annealing; shear cutting

Citation: Rudolf Kawalla, Anett Stöcker, Ulrich Prahl, Xuefei Wei, Jens Dierdorf, Gerhard Hirt, Martin Heller, Stefan Roggenbuck, Sandra Korte-Kerzel, Hannes Alois Weiss, Philipp Tröber, Lucas Böhm, Wolfram Volk, Nora Leuning, Kay Hameyer. Low-loss FeSi sheet for energy-efficient electrical drives. AIMS Materials Science, 2018, 5(6): 1184-1198. doi: 10.3934/matersci.2018.6.1184

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