Numerical Modeling and Material Characterization for Multilayer Magnetically Shielded Room Design

被引：22

作者：

Canova, A. ^{[1
]}

Freschi, F. ^{[2
]}

Giaccone, L. ^{[1
]}

Repetto, M. ^{[2
]}

机构：

[1] Politecn Torino, Dipartimento Energia Galileo Ferraris, I-10129 Turin, Italy

[2] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld 4072, Australia

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2018年 / 54卷 / 03期

关键词：

Hysteresis model; integral formulation; magnetic shielding; Rayleigh region; LOW FIELDS;

D O I：

10.1109/TMAG.2017.2771314

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, a method for the assessment of magnetic properties of ferromagnetic materials at low magnetic field values is presented. The knowledge of these properties is crucial for the design of magnetically shielded rooms that must be effective against low-frequency external magnetic field disturbances on the order of 0.1-1 mu T. The considered shielding structure is composed by a number of layers made of different high-permeability ferromagnetic sheets as grain-oriented electric steel and nickel-iron soft magnetic alloy. The ferromagnetic materials in this region follow the Rayleigh law that is a quadratic law between magnetic flux density and the applied field. Two material-dependent parameters of this law are obtained by a characterization of the material behaviour performed on a scaled prototype of a magnetically shielded room. The procedure is validated on a multilayer shield structure.

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