Thermal effects on magnetic hysteresis modelingA temperature dependent model is necessary for the generation of hysteresis loops of ferromagnetic materials. In this study, a physical model based on the Jiles-Atherton model has been developed to study the effect of temperature on the magnetic hysteresis loop. The thermal effects were included through a model of behavior depending on the temperature parametersMsandkof the Jiles-Atherton model. The temperature-dependent Jiles-Atherton model was validated through measurements made on ferrite material (3F3). The results have been found to be in good agreement with the model.

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-The study of thermal behaviour is useful to identify causes of failure in electrical machines. This work details a two dimensional model for computing the magnetic and thermal finite element solution of induction motor using a weak coupling algorithm. In order to improve the accuracy of the adopted numerical formulation, the decrease of the electric conductivity with temperature is taking into account.

The work is to develop a model for magnetic hysteresis taking into account the temperature. We introduced the effect of temperature through behavior as a function of temperature settings and model Jiles Atherton. The results of the model in terms of saturation induction, remanent induction, coercive field and the evolution of hysteresis cycle as a function of temperature are accort with theory and with results given in [1]. A program for calculating field incorporating model hysteresis to study a system of induction heating is also necessary. This program of resolution was developed using the finite element method in 2D. The simulations carried out with this calculation programme we allowedto study the evolution of the hysteresis loop according to the temperature. They also make it possible to deduce the evolution from the losses by hysteresis and eddy currents as a function of temperature.

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