Since a long time, systems and electrical devices are everywhere in the industrial and domestic environments. The magnetic core of these systems is a key for achieving energy conversion efficiency. Apart from the geometry optimization, high performance materials are mandatory for obtaining an effective energy conversion, as well as deep knowledge of their behaviour. The choice of materials is even more important when strong constraints are imposed, like high temperature and high frequency, which are more and more met nowadays. Our work is taken on in the context of the research activity on the modeling of the behaviour of magnetic materials of the “materials” team of AMPERE-Lab. Starting from a large number of experimental characterizations of materials at different temperatures, we have developed a “dynamic” model adapted to the different kinds of magnetic materials, which allows to quickly simulate the effect of temperature on the steady-state and transient regime of simple electromagnetic systems. It is founded on using Jiles-Atherton’s hysteresis models together with the so called “flux tubes”. This modelling and the associated approach of coupling electrical, thermal and magnetic phenomena are validated on a current sensor and an inductance. The results confirm the importance of the effect of the temperature on the performances of systems, and the interest of having such a model so as to optimizing these systems
Characterization and modeling of soft ferromagnetic materials under thermal stress