STEADY-STATE THERMAL-ANALYSIS OF AN ASYNC HRONOUS MOTOR WITH AN EXTERNAL COOLING BY FINITE-ELEMENT METHOD

The steady state thermal modelling of an 4 kW asynchronous motor is re alized. A design has been made thanks to the Flux2D finite element mag netic calculus software converted into a resolution tool of the heat e quation. This last is used to simulate the heat flux in fluid and soli d areas. A 3D study is effected thanks to two 2D studies. The first co ncerns a radial view (perpendicular to the mechanical axis) whereas th e second is effected for an axial view (parallel to the mechanical axi s). Thermal conductivities of the materials and thermal contact resist ances of the motor are determined through two different tests creating different overheatings. The first is made with a sinewave supply and pre-determine the thermophysical parameters. The second effected with direct current supplies at the rotor and the stator is used to validat e these last parameters.