期刊
IEEE TRANSACTIONS ON MAGNETICS
卷 48, 期 12, 页码 4727-4734出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2012.2203314
关键词
Electrical steel; experiment; frequency domain analysis; magnetostriction; structural vibrations
The ac magnetostriction in electrical steel is commonly characterized in the time domain (e. g., the peak-to-peak, zero-to-peak amplitude) and also in the frequency domain (e. g., a harmonic analysis). However, due to the dynamical coupling of the test sample with the experimental setup, the characterization of the magnetostriction (especially the one in the frequency domain) can give the wrong result. This research focuses on an experimental frequency characterization of magnetostriction and gives the theoretical background of the test sample's dynamical coupling with the experimental setup. The discussed natural dynamics of the test sample from the point of view of the different boundary conditions that can be used at the experiment gives a clear picture of the dynamical coupling. Besides the theoretical background, a detailed experimental approach is presented. This paper theoretically and experimentally shows that the dynamical coupling of the sample can result in incorrect characterization of the magnetostriction. However, with the theoretical guidelines presented, the dynamical coupling can be completely avoided, which results in an accurate characterization of the magnetostriction.
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