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Desing of measuring of electric machine rotor temperatue
Chalupa, Jan ; Krejčí, Petr (referee) ; Vlach, Radek (advisor)
This bachelor thesis is focused on temperature measurement issues of rotating parts of electrical devices. Thesis includes proposition and implementation of hardware solution, which enables multi-channel temperature measurements using PT100 sensors. Measured temperature is transmitted into the user’s PC. Thesis also includes user software solution for Windows platforms. Hardware requirements are low. System is primarily determined for temperature test of electrical devices. It can be also used for long-term monitoring of devices in operating state. Transmitter was designed with following considerations. Minimal size, low consumption, mechanical and thermal endurance. These demands require comprehensive approach to the whole system solution.
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Torque-speed characteristic optimization of an induction machine using machine learning
Bártková, Tereza ; Klíma, Petr (referee) ; Bílek, Vladimír (advisor)
Purpose of this work is optimization of given electrical machine based on combination of selected methods. The first chapter introduces machine learning in general. Its fundamental approaches and typical problems are analyzed together with some of the actual algorithms. The topic of optimization is introduced in the following chapter - its purpose and explanation of its concepts. The limitations we face while optimizing designs are demonstrated on two basic methods. Several popular algorithms are described, that could possibly be used in the context of electrical machines' optimization. One of the goals is reached in the third chapter - the choice of machine learning method in combination with optimization algorithm. The fourth chapter deals with matters of creating the induction machine geometry and subsequently its electromagnetic model for the following analysis. Details of geometric dimensions and electromagnetic parameters are introduced as well as calculation of end winding leakage inductance, one phase winding resistance and resistance and inductance between bars. There is also a brief description of the tools used for creating the model. The next chapter presents results of the electromagnetic analysis of the model. The process of creation on surrogate models of a given machine is described in the sixth chapter. It comprises the sensitivity analysis, creation of the initial training data and active learning. Next chapter deals with the optimization of the given machine utilizing surrogate models and selected optimization algorithms. The last chapter compares original machines' characteristics to those of optimized geometries.
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Desing of measuring of electric machine rotor temperatue
Chalupa, Jan ; Krejčí, Petr (referee) ; Vlach, Radek (advisor)
This bachelor thesis is focused on temperature measurement issues of rotating parts of electrical devices. Thesis includes proposition and implementation of hardware solution, which enables multi-channel temperature measurements using PT100 sensors. Measured temperature is transmitted into the user’s PC. Thesis also includes user software solution for Windows platforms. Hardware requirements are low. System is primarily determined for temperature test of electrical devices. It can be also used for long-term monitoring of devices in operating state. Transmitter was designed with following considerations. Minimal size, low consumption, mechanical and thermal endurance. These demands require comprehensive approach to the whole system solution.
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