Modelling magnetic laminations under arbitrary starting state and flux waveform

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• 作者：Oriano Bottauscio ; Mario Chiampi ; Carlo Ragusa
• 关键词：Field calculations ; Magnetic hysteresis ; Skin effect
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2005
• 出版时间：April 2005
• 年：2005
• 卷：290-291
• 期：Complete
• 页码：1446-1449
• 全文大小：249 K

文摘

A numerical model able to predict the behaviour of a magnetic sheet under arbitrary supply conditions has been developed. The electromagnetic field problem is formulated in terms of an electric vector potential, which provides the magnetic field strength evolution. The hysteretic behaviour of the material is represented through the dynamic Preisach model where the activation law of the bi-state operators is modified in order to guarantee a smooth response. The problem has been solved through a time step procedure using the fixed Point technique for handling nonlinearity. The model has been validated by comparison with suitable experiments and it is applied to the investigation of the influence of the materials’ starting state on the magnetic behaviour.