ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Recently, permanent magnet motors are widely used in many industrial fields becausethey are suitable for compact mechanical system. The motor core is usually manufactured frommagnetic steel sheet with press machine. However, usually most parts of the plate are scraped, andonly small percent of the sheet is used for the core. The spiral accumulating core system is suitablefor manufacturing the core more ecologically because in this system more than 50% of the magnetsteel sheet can be used. In this study, therefore, the effective Young’s modulus of the spiralaccumulating core is considered in order to find out a good method to fix the core. In this analysis,the finite element method is applied to 3D models, whose layers and slits are periodically arranged.Stress and thickness distributions are also analyzed in the bending process. When the spiral core ismanufactured through spiral accumulating system with plate-bending process, the thickness changeshould be minimized because that may deteriorate dimensional accuracy of the spiral core. Alsoresidual bending stress is investigated because that may cause an electric loss. The results indicatethat plastic zone is limited at localized regions and therefore an electric loss is not very large. Theeffective Young’s modulus of the 3D dimensions model of the real spiral accumulating core isestimated about 127.5 GPa
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.385-387.37.pdf
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