The magnetic field and induced current arising from a cylindrical shell loop with an unbalanced current

L. Xu, Ya Ping Du, Q. B. Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


This paper addresses the magnetic field and induced current associated with a cylindrical shell loop under the excitation of an unbalance current source. An equivalent circuit theory is introduced to describe the coupling effect when the cylindrical shell loop is formed. Close-form expressions of the circuit component parameters are derived, as well as the induced current and magnetic field. An experimental validation of the theory is presented. It is demonstrated that an electrically "isolated" cylindrical shell has no shielding effect, and effective shielding results if an opposite electric current flows along the cylindrical shell. Any additional resistance introduced in the loop will degrade the shielding performance.
Original languageEnglish
Pages (from-to)21-26
Number of pages6
JournalElectric Power Systems Research
Issue number1
Publication statusPublished - 1 Sep 2004


  • Cylindrical shield
  • Magnetic field
  • Unbalanced current

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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