scholarly journals Rotational Iron Losses and Their Estimation in Electrical Steel Sheets

1997 ◽  
Vol 21 (4_2) ◽  
pp. 709-712 ◽  
Author(s):  
C. Kaido ◽  
T. Wakisaka
Keyword(s):  
Electrical Steel ◽  
Steel Sheets ◽  
Iron Losses ◽  
Electrical Steel Sheets

scholarly journals Effect of multi-axial stress on iron losses of electrical steel sheets

2019 ◽  
Vol 469 ◽  
pp. 19-27 ◽  
Author(s):  
U. Aydin ◽  
P. Rasilo ◽  
F. Martin ◽  
A. Belahcen ◽  
L. Daniel ◽  
...  
Keyword(s):  
Electrical Steel ◽  
Axial Stress ◽  
Steel Sheets ◽  
Iron Losses ◽  
Electrical Steel Sheets

Effect of mechanical stress on different iron loss components up to high frequencies and magnetic flux densities

2017 ◽  
Vol 36 (3) ◽  
pp. 580-592 ◽  
Author(s):  
Jan Karthaus ◽  
Simon Steentjes ◽  
Nora Leuning ◽  
Kay Hameyer
Keyword(s):  
Mechanical Stress ◽  
Electrical Steel ◽  
Mechanical Stresses ◽  
Iron Loss ◽  
Content Type ◽  
High Frequencies ◽  
Steel Sheets ◽  
Iron Losses ◽  
Loss Component ◽  
Electrical Steel Sheets

Purpose The purpose of this paper is to study the variation of the specific iron loss components of electrical steel sheets when applying a tensile mechanical load below the yield strength of the material. The results provide an insight into the iron loss behaviour of the laminated core of electrical machines which are exposed to mechanical stresses of diverse origins. Design/methodology/approach The specific iron losses of electrical steel sheets are measured using a standardised single-sheet tester equipped with a hydraulic pressure cylinder which enables application of a force to the specimen under test. Based on the measured data and a semi-physical description of specific iron losses, the stress-dependency of the iron loss components can be studied. Findings The results show a dependency of iron loss components on the applied mechanical stress. Especially for the non-linear loss component and high frequencies, a large variation is observed, while the excess loss component is not as sensitive to high mechanical stresses. Besides, it is shown that the stress-dependent iron loss prediction approximates the measured specific iron losses in an adequate way. Originality/value New applications such as high-speed traction drives in electric vehicles require a suitable design of the electrical machine. These applications require particular attention to the interaction between mechanical influences and magnetic behaviour of the machine. In this regard, knowledge about the relation between mechanical stress and magnetic properties of soft magnetic material is essential for an exact estimation of the machine’s behaviour.

Modeling of multi-axial stress dependent iron losses in electrical steel sheets

2020 ◽  
Vol 504 ◽  
pp. 166612
Author(s):  
U. Aydin ◽  
P. Rasilo ◽  
F. Martin ◽  
A. Belahcen ◽  
L. Daniel ◽  
...  
Keyword(s):  
Electrical Steel ◽  
Axial Stress ◽  
Steel Sheets ◽  
Iron Losses ◽  
Stress Dependent ◽  
Electrical Steel Sheets

scholarly journals Grain Size Influence on the Magnetic Property Deterioration of Blanked Non-Oriented Electrical Steels

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7055
Author(s):  
Lucas Boehm ◽  
Christoph Hartmann ◽  
Ines Gilch ◽  
Anett Stoecker ◽  
Rudolf Kawalla ◽  
...  
Keyword(s):  
Grain Size ◽  
Electrical Steel ◽  
Coarse Grained ◽  
Core Material ◽  
Process Step ◽  
Steel Sheets ◽  
Iron Losses ◽  
Average Grain Size ◽  
Blanking Process ◽  
Electrical Steel Sheets

Non-oriented electrical steel sheets are applied as a core material in rotors and stators of electric machines in order to guide and magnify their magnetic flux density. Their contouring is often realized in a blanking process step, which results in plastic deformation of the cut edges and thus deteriorates the magnetic properties of the base material. This work evaluates the influence of the material’s grain size on its iron losses after the blanking process. Samples for the single sheet test were blanked at different cutting clearances (15 µm–70 µm) from sheets with identical chemical composition (3.2 wt.% Si) but varying average grain size (28 µm–210 µm) and thickness (0.25 mm and 0.5 mm). Additionally, in situ measurements of blanking force and punch travel were carried out. Results show that blanking-related iron losses either increase for 0.25 mm thick sheets or decrease for 0.5 mm thick sheets with increasing grain size. Although this is partly in contradiction to previous research, it can be explained by the interplay of dislocation annihilation and transgranular fracturing. The paper thus contributes to a deeper understanding of the blanking process of coarse-grained, thin electrical steel sheets.

Measuring Iron Loss of the Electrical Steel Sheets with Different Grades under Compressive Stress Normal to the Surface

2019 ◽  
Vol 139 (4) ◽  
pp. 190-196
Author(s):  
Shinya Urata ◽  
Yoshitaka Maeda ◽  
Hideo Nakai ◽  
Yuuya Takeuchi ◽  
Kyyoul Yun ◽  
...  
Keyword(s):  
Compressive Stress ◽  
Electrical Steel ◽  
Iron Loss ◽  
Steel Sheets ◽  
Electrical Steel Sheets

Directional Properties of Cold Rolled Non-oriented Electrical Steel Sheets

2013 ◽  
Vol 67 (1) ◽  
pp. 131-135 ◽  
Author(s):  
D. Prusty ◽  
H. K. Pradhan ◽  
V. D. Hiwarkar ◽  
S. K. Sahoo
Keyword(s):  
Electrical Steel ◽  
Steel Sheets ◽  
Cold Rolled ◽  
Electrical Steel Sheets
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