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Air-gap fringing flux reduction in inductors using open circuit copper screens

Fletcher, J.E. and Williams, B.W. and Mahmoud, M.M. (2005) Air-gap fringing flux reduction in inductors using open circuit copper screens. IEE Proceedings Electric Power Applications, 152 (4). pp. 990-996.

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In a gapped inductor, airgap fringing flux induces eddy currents in coil conductors in the vicinity of the airgap, producing unwanted power loss and heat in the coil. An open-circuit copper screen placed around the airgap of a ferrite core is shown to reduce the fringing flux around the airgap. The reduction in fringing flux is shown by experiment to reduce the power loss, in the inductor winding, associated with eddy currents induced by airgap fringing flux, and practical results compare favourably with presented finite-element results. The reduction in coil losses reduces the cooling requirement for the inductor, or alternatively, allows an increase in the thermal rating of the inductor.

Item type: Article
ID code: 5178
Keywords: electrical engineering, power systems, components, flux reduction, Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Depositing user: Strathprints Administrator
Date Deposited: 17 Jan 2008
Last modified: 21 May 2015 09:41

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