Thermal behavior of an electrical motor through a reduced model

The aim of this study is to obtain quickly thermal information on some sens itive components of an electrical motor in a short lapse of time. The therm al behavior of this complex system is modeled and validated. The correspond ing detailed model leads to the resolution of a linear system of differenti al equations of high order, but is not easy to handle for control purposes, due to long CPU time, In order to compute faster, two model reduction tech niques are used: the Eitelberg method and the reduction by modal identifica tion. The reduced models effectively give good temperature accuracy on the critical points of the motor with very fast computation time.