Dynamic effects in magnetic materials consist of both rate-dependent and rate-independent components. The rate-dependent effect consists of classical eddy currents and excess eddy currents, while the rate-independent part constitutes the static hysteresis effect. Bertotti shows, in an elegant way, the feasibility to add static hysteresis, classical eddy currents and excess eddy currents together to obtain a dynamic hysteresis model [1]. Furthermore he presents analytical expression for the rate-dependent part. These expressions have been used together with both the Jiles-Atherton [2] and the Preisach [3] models representing the static hysteresis.
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