A measurement method of the magnetic properties of magnetic sheet by means of a single sheet tester at audio frequency

A single sheet tester (SST) for audio frequency of 400 Hz–10 kHz was made experimentally and the magnetizing winding can get the nearly uniform distribution of flux density of a specimen in the longitudinal direction at the frequency up to 10 kHz. The flux densities at various positions of strips me...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2008-10, Vol.320 (20), p.e599-e603
Main Authors: Takara, Yusuke, Fujiwara, Koji, Ishihara, Yoshiyuki, Todaka, Toshiyuki
Format: Article
Language:English
Subjects:
Electrical steel sheet
Epstein method
Magnetic property at audio frequency
Magnetizing current method
Single sheet tester
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Description
Summary:A single sheet tester (SST) for audio frequency of 400 Hz–10 kHz was made experimentally and the magnetizing winding can get the nearly uniform distribution of flux density of a specimen in the longitudinal direction at the frequency up to 10 kHz. The flux densities at various positions of strips measured by the Epstein method were detected by search coils wound on strips at 400 Hz and 1.0 T. They have large discrepancy. However, the magnetic properties obtained from both methods have a little discrepancy. Although the uniformity of flux distribution in the Epstein frame is not sufficient, the average is fairly effective because the magnetic properties can be assumed to be locally linear within the small deviation of flux density.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2008.04.145