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A simple one-cycle power supply for approach to saturation studies in soft magnetic polycrystalline toroidal samples

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2 Author(s)
Le Floc'h, M. ; UFR Sci., Brest, France ; Le Guen, M.P.

The ring shape is a good solution to the study of the magnetization processes of magnetic materials because demagnetizing fields are easily avoided. However, when small samples are investigated, the magnitude of the field applied is necessarily limited by the low number of primary winding turns, and by the cross section of the wire itself. The use of sequential-type techniques for high current supply allows this problem to be avoided. One-cycle power production from the 50 Hz AC-line voltage is a simple example of such techniques. An electronic device designed around a commercial integrated circuit is described. A full period of current of 20-ms duration is applied to the load with a magnitude ranging from 0 to 100 A. Magnetization parameters of soft polycrystalline ring ceramics approaching the saturation region are studied as an application. The fitness to measure such characteristic parameters as saturation magnetization and magnetic hardness is shown

Published in:

Magnetics, IEEE Transactions on  (Volume:25 ,  Issue: 3 )

Date of Publication:

May 1989

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