| Abstrakt: |
This paper presents a method of parameterization of the thermal model of an electric motor on the example of an external rotor induction motor with high power density. The simulations presented in this paper were carried out on the motor model with a copper rotor cage with a rated power 25 kW and a mass of 16 kg. This construction, due to the demanding operating conditions they are subjected to, require precise thermal analysis at the design stage. In many works, this analysis is usually limited to thermal simulations without taking into account the rotating elements of the motor. This article presents a method of numerical determination of selected parameters of the CFD model, including the value of the heat transfer coefficient through the air gap, taking into account the rotational motion of the rotor, the convection coefficient, describing the intensity of convective heat exchange of the outer surface of the rotor body with the environment, and an alternative method of numerical determination of substitute values stator winding thermal conductivity coefficients. Based on the results obtained in numerical simulations, a three-dimensional CFD model of the motor was developed and solved. [ABSTRACT FROM AUTHOR] |
