Low-frequency magnetic shielding against unbalanced currents

Ya Ping Du; Mingli Chen

doi:10.1109/CEEM.2015.7368690

Low-frequency magnetic shielding against unbalanced currents

The Hong Kong Polytechnic University

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

2 Citations (Scopus)

Abstract

Magnetic shielding is an effective means to reduce low-frequency magnetic fields emitted from power cables and busbars. However, shielding against unbalanced currents has not been addressed well. This paper introduces equivalent magnetic dipoles for discussing magnetic shielding under a monopole current source. It is found that shielding is achieved by the cancellation of magnetic fields from both equivalent dipoles and the source monopole. However, the performance is not satisfactory because of a fast decaying rate of distance in the equivalent dipoles. To improve shielding performance under an unbalanced current source, it is recommended using either highly-permeable plates or multiple highly-conductive and electrically-connected plates.

Original language	English
Title of host publication	Proceedings - 7th Asia-Pacific Conference on Environmental Electromagnetics, CEEM 2015
Publisher	IEEE
Pages	299-303
Number of pages	5
ISBN (Electronic)	9781467394451
DOIs	https://doi.org/10.1109/CEEM.2015.7368690
Publication status	Published - 29 Dec 2015
Event	7th Asia-Pacific Conference on Environmental Electromagnetics, CEEM 2015 - Hangzhou, China Duration: 4 Nov 2015 → 7 Nov 2015

Conference

Conference	7th Asia-Pacific Conference on Environmental Electromagnetics, CEEM 2015
Country/Territory	China
City	Hangzhou
Period	4/11/15 → 7/11/15

Keywords

magnetic field
plate
power frequency
shielding

ASJC Scopus subject areas

Electrical and Electronic Engineering
Radiation
Environmental Science (miscellaneous)

More information

10.1109/CEEM.2015.7368690

Cite this

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AB - Magnetic shielding is an effective means to reduce low-frequency magnetic fields emitted from power cables and busbars. However, shielding against unbalanced currents has not been addressed well. This paper introduces equivalent magnetic dipoles for discussing magnetic shielding under a monopole current source. It is found that shielding is achieved by the cancellation of magnetic fields from both equivalent dipoles and the source monopole. However, the performance is not satisfactory because of a fast decaying rate of distance in the equivalent dipoles. To improve shielding performance under an unbalanced current source, it is recommended using either highly-permeable plates or multiple highly-conductive and electrically-connected plates.

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BT - Proceedings - 7th Asia-Pacific Conference on Environmental Electromagnetics, CEEM 2015

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ER -

Low-frequency magnetic shielding against unbalanced currents

Abstract

Conference

Keywords

ASJC Scopus subject areas

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