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A Study on the Deperm Protocols Considering Demagnetizing Field of a Ferromagnetic Material
Journal of Magnetics, Volume 19, Number 1, 31 Mar 2014, Pages 43-48
Abstract
Magnetic materials with large coercive force and high squareness ratio are currently developing to meet an industrial demand. Since a ferromagnetic material has hysteresis characteristics, it is hard to demagnetize a ferromagnetic material precisely. In this paper, we describe deperm processes and conduct an analysis of residual magnetization of ferromagnetic material using the Preisach modeling with a two-dimensional finite elements method (FEM). From the results, it was shown that an exponential decrement form of deperm protocol is more efficient than a linear decrement form because of the demagnetizing field in the ferromagnetic material.
Keywords: deperm; ferromagnetic material; preisach model; Anhysteretic Deperm; Deperm-ME; demagnetization
DOI: http://dx.doi.org/10.4283/JMAG.2014.19.1.043
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