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A low cost demagnetizer with controllable cycle and adjustable level

Karunakar, K and Ranjan, M and Prabhu, K (1981) A low cost demagnetizer with controllable cycle and adjustable level. In: IEEE Transactions On Magnetics, 17 (5). 2488 - 2492.

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Abstract

Demagnetization to zero remanent value or to a predetermined value is of interest to magnet manufacturers and material users. Conventional methods of demagnetization using a varying alternating demagnetizing field, under a damped oscillatory or conveyor system, result in either high cost for demagnetization or large power dissipation. A simple technique using thyristors is presented for demagnetizing the material. Power consumption is mainly in the first two half-cycles of applied voltage. Hence power dissipation is very much reduced. An optimum value calculation for a thyristor triggering angle for demagnetizing high coercive materials is also presented.

Item Type: Journal Article
Additional Information: Copyright 1981 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences
Date Deposited: 04 Sep 2009 04:41
Last Modified: 19 Sep 2010 05:34
URI: http://eprints.iisc.ernet.in/id/eprint/20686

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