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Assessing anomalous losses with dynamic hysteresis models

Abstract : A new approach to face the problem of dynamic hysteresis and assess extra-losses in soft magnetic materials is investigated. Thanks to a spatial averaging technique and a variational principle, a dedicated formulation is derived. It takes into account microscopic magnetization mechanisms and domain wall motion-induced Joule losses. A validation is proposed by assessing time-harmonic losses on a 2D-Pry and Bean iron sheet. Discussion includes also a confrontation with the delayed diffusion model and Bertotti's experiments.
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Submitted on : Thursday, August 11, 2011 - 11:16:04 AM
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Vincent Mazauric, Mathilde Drouineau, Loïc Rondot. Assessing anomalous losses with dynamic hysteresis models. International Journal of Applied Electromagnetics and Mechanics, IOS Press 2010, 33 (1-2), pp.95-101. ⟨10.3233/JAE-2010-1101⟩. ⟨hal-00614423⟩



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