Comparison of Time-Domain Models for Magnetic Hysteresis
Abstract
An accurate estimation of losses in magnetic materials is important for the design of electromagnetic and electromechanical components like inductors, transformers, and rotating machinery. Losses in a magnetic core may broadly be categorized into eddy current and hysteresis losses. A type of magnetic materials called ferrites is highly resistive and losses in such materials are predominantly due to hysteresis. This work focuses on prediction of hysteresis behavior in such materials. Herein, the two most widely used time-domain models, Jiles Atherton and Preisach, are studied and compared. To this end, first the original version of the former is presented along with a discussion of the possible flaws in its physical basis. Later an attempt is made at correcting the equation that represents this model. Following this, the Preisach model with three variations is presented. The numerical parameters of these models are then characterized based on B-H trajectory for an MN80C ferrite sample. Finally, model predictions are tested for alternate input waveforms.
Degree
M.S.E.C.E.
Advisors
Sudhoff, Purdue University.
Subject Area
Electrical engineering
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