Non-Destructive Electromagnetic Evaluation of Material Degradation Due to Steel Cutting in a Fully Stacked Electrical Machine

Ahmed Selema, Mohamed N. Ibrahim () and Peter Sergeant
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Ahmed Selema: Department of Electromechanical, Systems, and Metal Engineering, Ghent University, 9000 Ghent, Belgium
Mohamed N. Ibrahim: Department of Electromechanical, Systems, and Metal Engineering, Ghent University, 9000 Ghent, Belgium
Peter Sergeant: Department of Electromechanical, Systems, and Metal Engineering, Ghent University, 9000 Ghent, Belgium

Energies, 2022, vol. 15, issue 21, 1-17

Abstract: Although it is well known that the magnetic properties of electrical steel can be deeply affected by the cutting process, it is still not clear how to accurately evaluate these effects on a prototyped machine on its final shape, especially at a high frequency or a high power rating. This research provides a more practical method for accurate measurement of magnetic losses in electrical steel with consideration of material degradation effects due to the cutting process. Unlike other similar studies, these investigations are conducted not only on a few laminations but also on a complete electrical machine core. For a fair comparison between both cases, backlack bonding is used for lamination stacking since it is the most non-damaging joining technique. Two different test setups are used to measure the steel performance at a wide range of frequency and input power. Furthermore, a full axial length stator of a switched reluctance machine (SRM) is used as a case study to identify the magnetic properties of NO20 electrical steel. Additionally, by comparing the results obtained from the individual laminations and the assembled stator, the extra losses due to the cutting process and material degradation are extracted accurately.

Keywords: electrical steel; electrical machines; magnetic material; core losses; hysteresis losses; BH loop; manufacturing effects; SRM (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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