Séminaire OMN, 5 Mars 2020, Meryeme JAMIL

Meryeme JAMIL, effectuera une présentation intitulée :

Impact of the machine functioning temperature on the material electromagnetic behavior

Jeudi 5 Mars 2020, 14h00
Salle SAPHIR, Bât. ESPRIT

Résumé

Magnetic materials are at the heart of the energy conversion in electrical machines. Their electric and magnetic properties are strongly related to the machine performances and energy efficiency. In order to study and to simulate the electrical machine under its operating conditions, the material electromagnetic behavior should be well known and well characterized not only at room temperature but also at the machine operating temperatures. In fact, during the machine operation, in some hot spots, the magnetic core temperature may reach high temperature levels. As a consequence, the magnetic core properties may considerably change, as for the electrical conductivity to which eddy current losses are directly linked. This modifications can be reversible and disappear once the core has cooled, as it can be irreversible and then speaks of magnetic aging of the material. So, to predict accurately the machine performances, it is necessary to perform both thermal and electromagnetic analyses, starting by characterizing the temperature dependence of the core electromagnetic properties and investigating the magnetic ageing.