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Study of Low Frequency Magnetic Shielding of a Thin Al/Steel/Al Composite in Various Applications

Abstract : A composite constituted of a steel sheet taken in a sandwich between two aluminum (Al) sheets is produced by cold roll bonding. A good adherence between Al and steel sheets, ensuring a good mechanical resistance, is obtained with a specific process. A previous work of the authors has shown that optimal condition between adherence and magnetic shielding effectiveness (SEH) is obtained with a 230 µm composite produced with an initial thickness of Al and steel sheets respectively of 250 and 100 µm. In this paper, the 230 µm Al/Steel/Al composite is used in three applications modelized by 2D numerical simulations. To facilitate calculations, a homogenization method is applied to the composite. Studied applications are a cylindrical box containing a coil, a square box under an external magnetic field and a high voltage cable. In each application, SEH is calculated at low frequency (1 Hz-100 kHz) and different materials (Al/Steel/Al, Al, steel, and copper) are compared. It is observed that, in each application, the composite is more advantageous at equal mass and especially at frequencies higher than around 5-10 kHz.
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Contributor : Xavier Mininger <>
Submitted on : Monday, August 23, 2021 - 12:15:49 PM
Last modification on : Wednesday, August 25, 2021 - 3:28:50 AM

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  • HAL Id : hal-03324139, version 1

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Paul Clérico, Xavier Mininger, Laurent Prevond, Thierry Baudin, Anne-Laure Helbert. Study of Low Frequency Magnetic Shielding of a Thin Al/Steel/Al Composite in Various Applications. International Symposium on Theoretical Electrical Engineering, 2019, Sofia, Bulgaria. ⟨hal-03324139⟩

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