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Design Guidelines for interlocked stator cores made of CoFe sheets

Martin, Daniel M. ; Bäcker, Frederic ; Deusinger, Björn ; Kubik, Christian ; Gehringer, Philipp ; Schröder, Joana ; Groche, Peter (2022):
Design Guidelines for interlocked stator cores made of CoFe sheets. (Publisher's Version)
In: IOP Conference Series: Materials Science and Engineering, 1238, IOP Publishing, e-ISSN 1757-899X,
DOI: 10.26083/tuprints-00021476,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Design Guidelines for interlocked stator cores made of CoFe sheets
Language: English
Abstract:

CoFe lamination stacks used for high-performance electric motors can be manufactured economically in high volumes by interlocking. In order to ensure sufficient joint strength with minimized sheet thickness, a comprehensive knowledge of the influences of various process parameters, such as embossing depth, clearance and counter punch force, is essential. To analyze these parameters, which also influence the magnetic properties, experiments are carried out and resulting joint strengths are determined in top tensile tests. The negative influences of the cutting process on magnetic conductivity and thus hysteresis losses due to residual stresses and plastic deformation are well known. In the subsequent stacking step, an influence of embossing and pre-stresses on the material properties is expected. In addition, local electrical contacts between the sheets may occur due to the interlocking process, causing additional eddy currents. Loss measurements are conducted to investigate the effect of the joining process on the magnetic properties of the stack. In doing so, the influence of process parameters such as the embossing depth and clearance on eddy current power losses is analyzed.

Journal or Publication Title: IOP Conference Series: Materials Science and Engineering
Volume of the journal: 1238
Place of Publication: Darmstadt
Publisher: IOP Publishing
Collation: 9 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Institute for Production Engineering and Forming Machines (PtU)
18 Department of Electrical Engineering and Information Technology > Institute for Electrical Energy Conversion
Date Deposited: 13 Jul 2022 12:43
Last Modified: 06 Sep 2022 09:41
DOI: 10.26083/tuprints-00021476
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-214764
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21476
PPN: 498909719
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