A New Methodology to Predict the Magnetic Shielding Effectiveness of Enclosures at Low Frequency in the Near Field

Amin Frikha (1) , Mohamed Bensetti (1) , Fabrice Duval (2) , Nabil Benjelloun (3) , Frédéric Lafon (4) , Lionel Pichon (1)

1 GeePs - Laboratoire Génie électrique et électronique de Paris
2 IRSEEM - Institut de Recherche en Systèmes Electroniques Embarqués
3 Pôle Electronique et Systèmes
4 VALEO

In this paper, a methodology to calculate the shielding effectiveness (SE) of enclosures with slots at low frequency in the near magnetic field is presented. This modeling technique is based on the magnetic moments and the transmission line (TL) approach and makes specific assumptions. It is applied to a slot of small size relative to the dimensions of the enclosure. The slot is electrically short. This technique is validated in the case of a real enclosure with numerical simulations and experimental data. This method is dedicated to the case of mechatronics boxes using in electric and hybrid vehicles (EHVs), it allows obtaining the results with sufficient accuracy precision for dimensioning a magnetic shielding in a short time.

Keywords: Near Field; Shielding effectiveness; Electromagnetic Compatibility; Enclosure; Low frequency; Magnetic moment; Magnetic field; Slot; Near field

Domains: Physics [physics]; Engineering Sciences [physics]

Amin Frikha, Mohamed Bensetti, Fabrice Duval, Nabil Benjelloun, Frédéric Lafon, et al.. A New Methodology to Predict the Magnetic Shielding Effectiveness of Enclosures at Low Frequency in the Near Field. IEEE Transactions on Magnetics, 2015, 51 (3), pp.8000404. ⟨10.1109/TMAG.2014.2362953⟩. ⟨hal-01235444⟩