20.500.12556/RUL-107582 Zasnova in numerično vrednotenje kombiniranega kapljevinsko-zračnega hladilnega sistema elektromotorja Design and numerical evaluation of combined liquid-air cooling system of an electric motor Naloga zajema zasnovo in numerično vrednotenje kombiniranega kapljevinsko-zračnega hladilnega sistema elektromotorja. V začetnem delu so navedene zahteve naročnika, nato pa so podane teoretične osnove obravnavanega problema. Sledi pregled obstoječih rešitev zračnega hlajenja elektromotorja in predstavitev obstoječega elektromotorja ter predlaganega koncepta kombiniranega kapljevinsko-zračnega hladilnega sistema. Opisana sta postopka meritev temperatur obstoječega elektromotorja ter izdelave merilnega instrumenta za merjenje temperature na rotorju. Podan je problem zračnosti med rotorjem in statorjem, pri katerem je zaradi geometrijskih značilnosti težaven popis lokalnih razmer, kot so npr. hitrost tekočine, toplotni tokovi, itd. S tem namenom je podana validacija numerične simulacije tokovnih pojavov v zračni reži na podlagi uporabe že obstoječih člankov in literature. Analizirana sta dva elektromotorja in sicer, obstoječi elektromotor, ki je validiran s pomočjo predhodno izvedenih meritev temperatur, ter elektromotor s kombiniranim kapljevinsko-zračnim hladilnim sistemom. Podana je primerjava analize obstoječega elektromotorja in elektromotorja s kombiniranim hladilnim sistemom. V primeru slednje opazimo povečan masni pretok zračnega toka skozi kanale rotorskega paketa in kroženje zraka v notranjosti elektromotorja. This thesis describes the design and the numerical evaluation of the combined liquid-air cooling system in an electric motor. The introduction presents contracting authority’s demands and the theoretical basis of the addressed problem. This provides the basis for analyses of existing electric motor air cooling solutions and analyses of the proposed concept of the combined liquid-air cooling system. Next, we describe the temperature measuring process in the existing electric motor and the process of making a measuring instrument to measure the temperature in the rotor. This part also presents the airgap problem between the rotor and stator, which consists of difficulties describing local conditions such as: fluid velocity, heat flows etc. For this purpose the validation of the numerical simulation is given, which is based on existing articles and literature. Then two electric motors are analysed, namely the existing electric motor which is validated with the help of the preliminarily measured temperatures, and the electric motor with the combined liquid-air cooling system. We then compare the analysis of the existing electric motor and the analysis of the electric motor with the liquid-air cooling system, noticing an increased mass flow of the air flow through the channels of the rotor package and air circulation inside the electric motor. elektromotor hlajenje elektromotorjev CFD simulacije validacija numeričnih simulacij kombinirano hlajenje meritve temperatur electric motor cooling of electric motors CFD simulations validation of numerical simulations combined cooling temperature measurements true false false [T. Krkoč] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2019-04-27 07:45:41 2019-04-27 07:45:45 2023-10-18 08:57:15 0000-00-00 00:00:00 2019 0 Ljubljana 0 XXV, 103 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.313.12:621.56(043.2) 212241 16612635 3407.pdf 3407.pdf 1 1532BC4A9312E2166C0DEEC758699753 0731d0a0434b762bb071bfbee5642fdf3ba41d64d25bcec88df1d02b8e4f5bc0 764817b6-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=118430 Fakulteta za strojništvo 0 0 0