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Control of Three-phase Sinusoidal Power Source
Žůrek, Tomáš ; Patočka, Miroslav (referee) ; Klíma, Bohumil (advisor)
This thesis deals with control of three phase inverter as three phase sinusoidal voltage source for UPS application. Thesis is split to two parts, teoretical and practical. Teoretical part deals with three phase inverter topology analysis according requirement of neutral line wire and possibilities of generating sinusoidal PWM in depend of topology. There are also analysed properties of contorled system and designed 3 regulation methods with simulations. Second part of thesis deals with realisation of sinusoidal power source with inverter borrowed by Elcom company. To inverter control is used digital signal controler TMS320F28335 with implemented control algorithms. There are also presented the measurement results of the prototype of power source. In conclusion, simulation results are compared with measurements and achieved results are summarized.
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Control of Three-phase Sinusoidal Power Source
Žůrek, Tomáš ; Patočka, Miroslav (referee) ; Klíma, Bohumil (advisor)
This thesis deals with control of three phase inverter as three phase sinusoidal voltage source for UPS application. Thesis is split to two parts, teoretical and practical. Teoretical part deals with three phase inverter topology analysis according requirement of neutral line wire and possibilities of generating sinusoidal PWM in depend of topology. There are also analysed properties of contorled system and designed 3 regulation methods with simulations. Second part of thesis deals with realisation of sinusoidal power source with inverter borrowed by Elcom company. To inverter control is used digital signal controler TMS320F28335 with implemented control algorithms. There are also presented the measurement results of the prototype of power source. In conclusion, simulation results are compared with measurements and achieved results are summarized.
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Influence and impact of digital film distribution on art-house cinemas
Žůrek, Tomáš ; DANIELIS, Aleš (advisor) ; VÍTEK, Petr (referee)
Digitalization of cinemas brings the biggest change in the distribution of films in the last decades and its impact affects all cinemas worldwide. The new programming options, extended range of alternative content and deeper dramaturgy are among other news which have been brought by digitalization. Are these new opportunities sufficient to make the classic and art-house cinemas competitive with multiplex?
The content of this work is analyse of the art-house cinemas in the Czech Republic. It explores the impact of digital distribution of films on these cinemas. Financing and technological changes which cinemas had to go through during the process of digitalization is the main focus of the work. The overall evaluation of the impact of digitization on the art-house cinemas is based on a comparison of art-house cinemas and their data relating to the digitalization and results of the questionnaire which has been sent to selected cinemas.
The last part contains a brief comparison of the process of digitization of cinemas in the Czech Republic, The UK and Slovakia.
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Art cinema houses, art film clubs and situation of cinemas with one screen
Žůrek, Tomáš ; Kopecký, Čestmír (advisor) ; Šuster, Jan (referee)
The objective of my work is to describe contemporary situation of art cinema houses and art film clubs in the Czech Republic. Tradition of these institutions in our country is dated back to the end of the fifties of the twentieth century. At present this area is going through some changes that I try to analyze.
In the first part I define the terms which are key for my work. Further I pay attention to activities of art cinema houses and art film clubs until 1993 when the Asociation of Czech Film Clubs was established. Its activities, issues related to art cinemahouses and artfilm clubs are described in the chapter 4 and 5. Further I deal with functioning of cinemas with one screen from perspective of dramaturgy and financing. At the end I describe potential future development of these institutions in the Czech Republic using a comparison with trends in other countries.
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