Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.00 vteřin. 
Thermal Calculation of Rotational Electrical Machines Using Thermal Network
Špérová, Alice ; Dědková, Jarmila (oponent) ; Kremser, Andreas (oponent) ; Kotrba,, Vít (oponent) ; Ondrůšek, Čestmír (vedoucí práce)
The work deals with construction and usage of thermal networks to simulate the temperature rise in electrical motors of high power. After the introduction into heat transfer and flow theory, the construction of three different thermal networks is explained. Further the work handles different optimization methods and their usage for thermal optimization of electrical motors. The Levenberg-Marquard method is chosen and on the example is explained the procedure and an advantage against other methods for optimizing electrical motors. In the conclusion the thesis points out the most important input parameters of the thermal networks and their general sensitivity. It compares the results of the simulation with the results of tests obtained in test field. Another point of concern is the thermal dependence of various elements in the network.
Thermal Calculation of Rotational Electrical Machines Using Thermal Network
Špérová, Alice ; Dědková, Jarmila (oponent) ; Kremser, Andreas (oponent) ; Kotrba,, Vít (oponent) ; Ondrůšek, Čestmír (vedoucí práce)
The work deals with construction and usage of thermal networks to simulate the temperature rise in electrical motors of high power. After the introduction into heat transfer and flow theory, the construction of three different thermal networks is explained. Further the work handles different optimization methods and their usage for thermal optimization of electrical motors. The Levenberg-Marquard method is chosen and on the example is explained the procedure and an advantage against other methods for optimizing electrical motors. In the conclusion the thesis points out the most important input parameters of the thermal networks and their general sensitivity. It compares the results of the simulation with the results of tests obtained in test field. Another point of concern is the thermal dependence of various elements in the network.

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