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

Paul Clérico (1, 2, 3) , Xavier Mininger (2) , Laurent Prevond (3) , Thierry Baudin (1) , Anne-Laure Helbert (1)

1 ICMMO - Institut de Chimie Moléculaire et des Matériaux d'Orsay
2 GeePs - Laboratoire Génie électrique et électronique de Paris
3 SATIE - Systèmes et Applications des Technologies de l'Information et de l'Energie

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.

Mots clés: Cold Roll Bonding; Finite Element Method; Homogenization; Shielding Effectiveness

Domaines: Matériaux; Electromagnétisme

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⟩