An analysis of shielding against DC magnetic fields generated by electric railways. Evaluation of effective permeability of fine structure

被引：0

作者：

Waki, Hiroshi ^{[1
]}

Igarashi, Hajime ^{[1
]}

Honma, Toshihisa ^{[1
]}

机构：

[1] Hokkaido Univ, Sapporo, Hokkaido 060, Japan

来源：

ELECTRICAL ENGINEERING IN JAPAN | 2007年 / 160卷 / 04期

关键词：

effective permeability; magnetic field analysis; magnetic shield; electromagnetic compatibility; electric railway;

D O I：

10.1002/eej.20310

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：

This paper describes an effective analysis of magnetic shielding based on homogenization. The analyses become time-consuming if the problems include the magnetic substances having fine structure. The homogenization of the structure makes it possible to analyze effectively the magnetic fields. The authors introduce a method to estimate the effective permeability of the homogenized substance. This method can be applied to any periodic structure made of magnetic substance. The magnetic shielding effects by the structures against direct-current (DC) fields generated by electric railways are analyzed by using the present method. As a result, it is found that the overhead way and the protective fence near the railway work as a magnetic shield, whose effects can be improved by appropriate arrangement of those constructions. (C) 2007 Wiley Periodicals, Inc.

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页码：7 / 15

页数：9