Modelování rozložení tepla v asynchronním motoru

Abstract

The topic of my diploma thesis is Simulation of Thermal Distribution in Induction Mot. The introduction deals with the characteristics and description of function of asynchronous mot. It describes the constructional implementation that is used at the motors and its usage in practice. In the next chapter are described operating states of electric motor, magnetic circuit and moments of asynchronous electric motor. The main topic of the diploma thesis is thermal distribution in mot, therefore the other chapters deal with question of charge of electric machines and the way of cooling and consequently the kinds of heat conduction and heat effects of electric current. For analysis of heat distribution in the mot can be used two models. The first one uses the resistor network that is very complex if it is used at the more complex calculations. The second one is through the method of final elements. In this thesis the calculation is done through the method of final elements. The model is made up in the programme Solid Works and the calculation is carried out in the programme Ansys. Simulation of thermal distribution is selected in three stages. In the first stage, the influence of heat transfer between stator and rotor is neglected and this transition is rated as perfect. In the second stage, the heat transfer between stator and rotor is respected and in the third one the stage without an electric fan is being solved. All results of heat transfer can be seen at the pictures and are carried out also in the graphs.