Differences between Preisach Model and Experiment for Soft Ferromagnetic Materials, Effect of Instrument Accuracy
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Mondragon Unibertsitateko Zerbitzu Editoriala Loramendi kalea,
Abstract
The practical use of Preisach hysteresis model is
based on proper identification of weighting function that
characterizes the material. Obtaining of the weighting function
needs two partial derivations of two-dimensional flux density
function, called Everett surface, measured by specific
procedure. Since the derivatives require exact measurements,
the possible source of errors are studied. Main method is to
compare experimental results and simulation. The comparison
showed that the excitation current source accuracy influences
the quality of Everett surface. Also the numeric integration
drift plays an important role. The random or systematic failure
in excitation current results in the minor secondary loops on
the main hysteresis loop. Simulations of these effects confirmed
the predicitons. As practical output it was found that the errors
in excitation can be reduced by repeated measurements. The
drift can be eliminated, if a more suitable wavefrom is used.
Description
Subject(s)
Keywords–, Magnetic hysteresis model, Preisach model, Everet function, First Order Reversal Curve method, integration drift, power voltage source accuracy, simulation of disturbances
Citation
ISSN
ISBN
978-150905582-1