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Visualisation and animation of charge carriers in electrical fields
Kachlík, Jan ; Aubrecht, Vladimír (referee) ; Bušov, Bohuslav (advisor)
This bachelor`s thesis deal with electromagnetic field. The aim of this thesis is acquaintance with physical regularity electric and magnetic field. Especially force effect to charge carriers traveling in these fields. In second part of this project is briefly describe switching arc behavior in high voltage circuit breaker. Principle function is animated in Autodesk 3ds Max 2009. Final point of assignment is create animated presentation about production nanofibres with help of unique technology NanospiderŽ
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Effect of a switching arc on design of low voltage switchgear
Šimek, David ; Bartlová, Milada (referee) ; Aubrecht, Vladimír (advisor)
The first part of the master thesis is focused on theoretical analysis of the problems of diagnostics of an electric arc physical properties. In the thesis there is shown identification of spectral lines in experimentally measured electric arc spectra. The thesis deals also with energy balance of the arc. Next part of thesis is aimed to theoretical analysis of effects of electric arc on construction materials of low voltage electric apparatuses. The main part of thesis is devoted to experimental measurement of arc radial temperature changes, measurement of cathode temperature and research of electrical arc effect on selected construction materials of low voltage apparatuses.
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Utilization of infrared camera for temperature measurement of electrical machines
Líbal, Jan ; Aubrecht, Vladimír (referee) ; Kuchyňková, Hana (advisor)
The master‘s thesis deals with utilization of infrared camera for temperature measurement of electrical machines. The first part describes non-contact temperature measuring, the second part describes principle of sensors that evaluate quantity of incident infrared radiation. In the next part there is termovision camera SAT-HY 6800 presented and the instructional manual for SAT Report computer programme created. This computer programme is used for analyzing of termovision pictures from the SAT-HY 6800 termovison camera. The chapter 7 describes temperature measuring of one-phase asynchronous motor type J22TO484. The chapter 8 describes temperature measuring of semiconductor components of EC motor G6 series. Both of these motors are produced by ATAS elektromotory Náchod a.s. The last part of the thesis describes creation of animation of one-phase asynchronous motor type J22TO455. The animation was created in 3ds Max computer programme.
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Utilization of ANSYS Workbench program at power electrical engineering
Partl, Tomáš ; Aubrecht, Vladimír (referee) ; Kuchyňková, Hana (advisor)
In its first part this Master´s thesis describes creation of electronic database design in Raster Design 2009 program as an effective form of storage only for paper documentation. The second part of my thesis provides calculation of primary and secondary winding of current instrument transformer of over-current conduit through the winding and influence on other parts of transformer i.e. error of transformer or increasing magnetic induction core and others. The last third part is focusing on usage of ANSYS Workbench in power electrical engineering. The thesis shows specific example of warming of current instrument transformer (thermal analysis) and comparing the results with theoretical (calculated) values.
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Calculation of radiative heat transfer in argon arc plasmas
Aubrecht, Vladimír
Radiative heat transfer is a significant energy exchange process in arc plasmas. In the paper, an approximate "Method of partial characteristics (MPC)" is used to evaluate radiation intensities, radiation fluxes and divergence of radiation fluxes in an arc plasmas of cylindrical symmetries at various plasma temperature profiles.
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Behavior of Electric Arc Inside a Quenching Chamber of High Voltage Circuit Breaker
Aubrecht, Vladimír ; Bušov, B.
A great influence on the switching process is exerted by aerodynamic relations in the quenching chamber, the direct measurement of which is hardly feasible using contemporary techniques. Therefore, the shape of the arc plasma burning between the circuit breaker contacts is scanned with a high-speed camera. The photographs from the high-speed camera represent a time analysis of the studied process, which allows through their digital processing the determination of the time changes of the arc plasma shape.
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