NDLI: Geometrical aspects of magnetic shielding at extremely low frequencies

Content Provider	IEEE Xplore Digital Library
Author	Hasselgren, L. Luomi, J.
Copyright Year	1964
Abstract	The magnetic shielding effectiveness for closed and open shield structures is studied at extremely low frequencies. Analytical solutions are used for simple geometries, while more complex structures are evaluated using a finite-element method. Both highly conductive and ferromagnetic materials are studied, and their different shielding behavior is shown. Ferromagnetic shields give good results for small and closed shields and they also give a large field attenuation at close range to the source for open shield geometries. Highly conductive materials, on the other hand, are found to be suitable for large shield sizes. The attenuation is, however, reduced in the close vicinity of the source. Comparisons of numerical results with analytical calculations and measurements confirmed the high accuracy of the finite-element model.<>
Sponsorship	IEEE Electromagnetic Compatibility Society
Starting Page	409
Ending Page	420
Page Count	12
File Size	1102418
File Format	PDF
ISSN	00189375
Volume Number	37
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic shielding Frequency Magnetic materials Magnetic field measurement Geometry Conducting materials Finite element methods Attenuation Shape Wavelength measurement
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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