Article Dans Une Revue IEEE Transactions on Magnetics Année : 2025

Identification of an Arbitrary-Surface Harmonic Magnetic Model from Close Measurements

Résumé

Decreasing spherical harmonic functions are widely used to identify and extrapolate the magnetic field produced by various devices. These functions allows to represent the sources as equivalent multipoles whose order is associated to a specific spatial decreasing rate. However this representation is not valid inside the Brillouin sphere, the smallest sphere enclosing the device. We introduce here the use of an alternative model to replace the spherical harmonic functions when the measurements are inside the Brillouin sphere. This representation corresponds to an harmonic basis of equivalent charges on a surface that reproduces the multipolar decomposition of the magnetic field outside the Brillouin sphere while being valid inside. We demonstrate here the ability of this model to identify and extrapolate the field from very close measurements.
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Dates et versions

hal-04818439 , version 1 (04-12-2024)

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Gauthier Derenty-Camenen, Olivier Chadebec, Olivier Pinaud, Laure-Line Rouve, Steeve Zozor. Identification of an Arbitrary-Surface Harmonic Magnetic Model from Close Measurements. IEEE Transactions on Magnetics, 2025, 61 (1), ⟨10.1109/TMAG.2024.3510643⟩. ⟨hal-04818439⟩
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