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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Optimization of high-speed induction machine
 Cajzl, Jakub ; Světlík, Martin (referee) ; Klíma, Petr (advisor)
This thesis deals with the multi-objective optimization of a high-speed asynchronous machine. The introduction is devoted to materials and losses in high speed asynchronous machines and comparison of basic rotor topologies. The next part of this thesis summarizes the basic information related to the optimization principles and the basic classification of optimization algorithms. Then the specific algorithms used in optimization problems are described in more detail. The main part of this thesis deals with proposals for increasing the efficiency of the original 2,5 kW high-speed asynchronous machine, which are verified by electromagnetic calculations. Furthermore, the optimization itself is already performed using the NSGA-II genetic algorithm created in Python. The optimization results are evaluated and the selected optimized models are compared with the initial and modified machine models. The efficiency of the 2,5 kW machine has been successfully increased mainly due to the radially slitted rotor with copper end-rings and the use of stator plates with lower core losses. By optimizing the machine geometry, the power factor was increased and winding and friction losses were reduced.
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