Transient heating and cooling analysis in an electromagnetic device

This paper is concerned with the finite element formulation of the transient heating and cooling problem in an electromagnetic device. The formulation presented is illustrated with the temperature distribution produced in a large 3-phase induction motor with a closed-air-circuit ventilation scheme under different load and coolant velocity conditions. The eddy currents and the hysteresis losses contributions due to the temperature-rise were taken into account, as well as the linear dependency of the electric resistivity with temperature. The numeric results obtained were compared with the experimental values available, showing a very close agreement