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Examination of eddy current influence on the behavior of a giant magnetostrictive functional unit
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
1990 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 67, 5010-5012 p.Article in journal (Refereed) Published
Abstract [en]

Current simulation models for the magnetoelastic behavior of giant magnetostrictive materials have been successfully used in designing low #x2010;frequency functional units based on magnetostrictive effects. At higher frequencies, however, the precision of these models decreases due to eddy currents inside the material. In a specially designed setup, a functional unit was electrically feeded with sinusoidal currents of different amplitudes and frequencies and mechanically loaded with different mechanical forces. The experimental data obtained were used in an extended simulation model able to include eddy current effects into the magnetomechanical process. The extended model has been verified experimentally for sinusoidal magnetizations at different frequencies and mechanical loads. A comparison between this experimentally extended model and a corresponding analytically extended model is also done. The comparison gives an indication of the interaction between mechanical stresses and magnetic field penetration inside the magnetostrictive material.

Place, publisher, year, edition, pages
1990. Vol. 67, 5010-5012 p.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-72017DOI: 10.1063/1.344706OAI: diva2:487136
NR 20140805Available from: 2012-01-31 Created: 2012-01-31 Last updated: 2012-01-31Bibliographically approved

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Engdahl, Göran
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