Low-frequency magnetic shielding against unbalanced currents

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)


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 languageEnglish
Title of host publicationProceedings - 7th Asia-Pacific Conference on Environmental Electromagnetics, CEEM 2015
Number of pages5
ISBN (Electronic)9781467394451
Publication statusPublished - 29 Dec 2015
Event7th Asia-Pacific Conference on Environmental Electromagnetics, CEEM 2015 - Hangzhou, China
Duration: 4 Nov 20157 Nov 2015


Conference7th Asia-Pacific Conference on Environmental Electromagnetics, CEEM 2015


  • magnetic field
  • plate
  • power frequency
  • shielding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Radiation
  • Environmental Science (miscellaneous)


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