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Power Converter for DC Welding
Vranák, Daniel ; Červinka, Dalibor (referee) ; Patočka, Miroslav (advisor)
The masters thesis was focused on design and realization power converter which should worked as welding machine. It was necessary choose suitable type converter. Next, it was needs design of pulsed transformer, output filter choke and design of semiconductors which were in power part welding machine. It was also designed control and driver circuits. This parts which were used on construct the converter were made and tested too.
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Study of Hydration Process of Anhydrite Binders
Verner, Filip ; Vavrušková,, Lenka (referee) ; Gazdič, Dominik (advisor)
The presented work deals with the study of hydration processes anhydrite binders with external exciters. Work is divided into two parts. Conceptually is this work divided into two parts The theoretical part of study contains general theory of gypsum binders, anhydrite binders and research at the institude THD. In the experimental part deals with proposal of recipes, making of samples and subsequent determination of main technological tests and monitoring hydration process by the XRD and DTA analysis.
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Study of Hydration of Anhydrite Binders
Duda, Štěpán ; Smetanová,, Lenka (referee) ; Gazdič, Dominik (advisor)
Presented bachelor thesis deals with the study of hydration of anhydrite binders. This thesis is primary focused on testing the various hydration exciters of anhydrite and subsequent monitoring of the hydration process by the XRD analysis and also builts on previous research in this area at the institute of THD. Conceptually is this work divided into two parts. The first part deals with the general theory of sulphate binders. The second part is devoted to the partical testing of the various hydration exciters and their subsequent comparsion.
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Converter for high-speed induction motor
Veselý, Petr ; Pazdera, Ivo (referee) ; Procházka, Petr (advisor)
The semestral thesis deals with designing a frequency changer. It describes general information about induction motors and power electronics, focusing on pulse converters. Based on given parametres, appropriate components were chosen and described. Also, there is power loss calculated in this document, which is used for dimensioning cooling. Also an LC filter is designed in this dokument. At last, there is a printed circuit board designed for the power part.
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Comparison of switching LED drivers
Káňa, Vojtěch ; Šotner, Roman (referee) ; Frýza, Tomáš (advisor)
This bachelor thesis describes switching LED drivers and their features. Is chosen and compared five integrated circuit, that one of them will be included in two different topologies. Especially in Buck-Boost and SEPIC configuration. Their characteristics and features will be simulated and designed in suitable software. Made equipment will be tested and compared their achievements properties. For a both of these drivers is required specified conditions as constant output current, input and output voltage.
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Control system for cantilever gates
Koždoň, Ondřej ; Šťastný, Ladislav (referee) ; Bradáč, Zdeněk (advisor)
In this bachelor's thesis is designed and in detail described a battery powered control system for wireless controlling swing gate. This system is designed as a small electronical system with necessary Inputs/Outputs (I/O) an Input for powering from solar cells and it is equipped with requisite software.
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Coilgun
Kovařík, Martin ; Pavlík, Michal (referee) ; Šteffan, Pavel (advisor)
This bachelor’s thesis describes the design and construction of electromagnetic gun for testing projectiles from different ferromagnetic materials with maximal power 19 J. Conventional projectile propulsion mechanisms include the use of compressed air or explosion which places theoretical limits on the maximum muzzle velocity limited by laws of thermodynamics. The electromagnetic coil gun, explores the use of electromagnetism in accelerating projectiles which offers a much higher theoretical limit on muzzle velocity. In addition of an electromagnetic acceleration is possible to regulate output velocity/energy of projectile, and acceleration applied on projectile.
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Switching LED drivers
Doležal, Miroslav ; Pavlík, Michal (referee) ; Šteffan, Pavel (advisor)
In this bachelor’s these are three basic typologies of drivers (step down, step up, step up and down output voltage) described. Five specific integrated circuits fulfilling the requirement for supplying LED diodes are selected. The output of this thesis is the design and construction of LED driver for supplying high brightness LEDs with 900 mA constant current.
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