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Design and analysis of three-phase induction motor
Svoreň, Jan ; Skalka, Miroslav (referee) ; Vítek, Ondřej (advisor)
This project is focused to projecting and analysing the three-phase induction machine. It starts with introduction to principle functions of electrical machines and their design issues. The main objective is to develop a method to calculate and analysis a smaller machine. The design involves the calculation of the main dimensions of the machine, the calculation of the number and dimensions of the rotor and stator grooves and calculation of the stator windings. Designed machine is analysed by calculation and finite elements method.
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Design of high-speed induction motor
Svoreň, Jan ; Ondrůšek, Čestmír (referee) ; Vítek, Ondřej (advisor)
This work deal with troubleshooting of problem parts of high-speed induction machines. Introduction is about conception of induction machines with reference to construction specialities due to high rpm and because machines are fed by inverter. Next part is focused to design problems. A classical induction machine was measured to determination change of various losses in classic and high-speed induction machines. The computation of laboratory sample high-speed motor was specified for calculation of effective resistance and leakage reactance of solid-steel rotor with copper layer. The results of numerical calculation were validated by using finite elements method and machine design was adjusted for improving operation characteristic.
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Meteor Shower Fireballs
Shrbený, Lukáš ; Spurný, Pavel (advisor) ; Svoreň, Ján (referee) ; Bland, Philip A. (referee)
Centimeter-sized meteoroids cause bright meteors, called meteoric fireballs, during their encounter with the Earth's atmosphere. These fireballs can be observed by all-sky photographic methods. In this thesis, bright meteors belonging to major meteor streams are studied. All presented fireballs were recorded during last few years by all-sky photographic cameras from the Czech part of the European Fireball Network, Spain (Leonids 1999 campaign), and from the Australian Desert Network. Physical properties in terms of different methods (end height criterion, beginning heights, apparent ablation coefficient, fragmentation, dynamic pressure at the height of fragmentation or terminal flare), very detailed light curves (periodic changes of brightness, afterglow, shortlived flares, profiles) and heliocentric orbits are studied by individual showers. Studied meteor showers are Orionids, Geminids, _-Capricornids, Southern -Aquariids, Leonids and Perseids and a comparison of their main properties was performed. Also comparison with meteorite dropping fireballs was performed.
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Meteor Shower Fireballs
Shrbený, Lukáš ; Spurný, Pavel (advisor) ; Svoreň, Ján (referee) ; Bland, Philip A. (referee)
Centimeter-sized meteoroids cause bright meteors, called meteoric fireballs, during their encounter with the Earth's atmosphere. These fireballs can be observed by all-sky photographic methods. In this thesis, bright meteors belonging to major meteor streams are studied. All presented fireballs were recorded during last few years by all-sky photographic cameras from the Czech part of the European Fireball Network, Spain (Leonids 1999 campaign), and from the Australian Desert Network. Physical properties in terms of different methods (end height criterion, beginning heights, apparent ablation coefficient, fragmentation, dynamic pressure at the height of fragmentation or terminal flare), very detailed light curves (periodic changes of brightness, afterglow, shortlived flares, profiles) and heliocentric orbits are studied by individual showers. Studied meteor showers are Orionids, Geminids, _-Capricornids, Southern -Aquariids, Leonids and Perseids and a comparison of their main properties was performed. Also comparison with meteorite dropping fireballs was performed.
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Design and analysis of three-phase induction motor
Svoreň, Jan ; Skalka, Miroslav (referee) ; Vítek, Ondřej (advisor)
This project is focused to projecting and analysing the three-phase induction machine. It starts with introduction to principle functions of electrical machines and their design issues. The main objective is to develop a method to calculate and analysis a smaller machine. The design involves the calculation of the main dimensions of the machine, the calculation of the number and dimensions of the rotor and stator grooves and calculation of the stator windings. Designed machine is analysed by calculation and finite elements method.
|
|
|
Design of high-speed induction motor
Svoreň, Jan ; Ondrůšek, Čestmír (referee) ; Vítek, Ondřej (advisor)
This work deal with troubleshooting of problem parts of high-speed induction machines. Introduction is about conception of induction machines with reference to construction specialities due to high rpm and because machines are fed by inverter. Next part is focused to design problems. A classical induction machine was measured to determination change of various losses in classic and high-speed induction machines. The computation of laboratory sample high-speed motor was specified for calculation of effective resistance and leakage reactance of solid-steel rotor with copper layer. The results of numerical calculation were validated by using finite elements method and machine design was adjusted for improving operation characteristic.
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