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Comparisons of AC Magnetostriction of Non-Oriented Electrical Steels Measured in Epstein and Disc Samples

Somkun, Sakda, Klimczyk, Piotr, Moses, Anthony John and Anderson, Philip Ian 2010. Comparisons of AC Magnetostriction of Non-Oriented Electrical Steels Measured in Epstein and Disc Samples. Journal of Electrical Engineering 61 (7/s) , pp. 89-92.

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Magnetostriction data of non-oriented electrical steel is needed for calculation of deformation and vibration of electrical machine cores. It is characterised on various sample shapes using several measurement techniques which may give different results. In this paper, measurement results of AC magnetostriction of two commercial non-oriented steels magnetised at angles to the rolling direction in standard Epstein strip and disc samples are presented. Magnetostriction measured in disc samples magnetised in a twodimensional magnetisation system revealed that the highest magnetostriction in the sheet plane may not occur along the magnetisation direction if the material is anisotropic. Sample geometry also caused differences of magnetostriction measured in the Epstein and disc samples due to the form effect. The results show that magnetostriction measured in Epstein strip form should be used with caution for calculation of core deformation and vibration of large electrical machines.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Uncontrolled Keywords: anisotropy, electrical steel, magnetostriction, rotational magnetisation
Publisher: The Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology, Bratislava and The Institute of Electrical Engineering of the Slovak Academy of Sciences, Bratislava
ISSN: 1335-3632
Last Modified: 04 Jun 2017 03:04

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