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Low-power electrical sources
Kotásek, Ondřej ; Pazdera, Ivo (referee) ; Procházka, Petr (advisor)
In the theoretical section describes the different types of DC / DC converters, which are among the best known. It's a drive with one storage element, decreasing and increasing non-inverting converter, an inverting converter with a common choke and Čuk’s changer. The second part deals with the actual design and implementation of the two input sources for low power. Here are described two main components designed for each circuit. Furthermore, the work to create schematics and PCB in Eagle. Finally, learn how to solder components on the PCB made.
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Electronic parts of small fotovoltaic power plant
Benda, Dušan ; Šťastný, Ladislav (referee) ; Bradáč, Zdeněk (advisor)
The thesis describes the design, implementation and subsequent testing of electronic circuits for usage in small photovoltaic power plants. It focused on the sub-power appliances, battery charging and monitoring of photovoltaic panels. Introduction of this work deals with selecting appropriate controllers for each subsystem and comparison of the proposed facilities with commercially available applications. A substantial part of the work describes the selected controller for each subsystem implemented and circuit design of the individual components of electronic systems in detail. For each subsystem are implemented measuring and comparing the results achieved.
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Controllable switching power supply 0-1000 V / 100 W
Hofmann, Oldřich ; Procházka, Petr (referee) ; Martiš, Jan (advisor)
The thesis deals with the design and construction of a switching power supply with output voltage adjustable from 0 to 1200 V and rated power of 120 W, which will be used to replace the existing high voltage power supply for the irreversible electroporation (IRE) device developed at UVEE FEEC BUT. The thesis focuses on a basic description of the IRE device, a description of usable converter topologies and a selection of the best topology for the required purpose. The selection of the control circuit concept and its design are also integral parts of the thesis. The final part of the thesis contains the assembly of the power supply and the measurement verifying its function.
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Optimization of the switching power supplies with synchronous rectifier
Skácel, Josef ; Macháň, Ladislav (referee) ; Žák, Jaromír (advisor)
This thesis deals with switching circuit topic, especially switching power supplies. There are switching circuits without inductance and their benefits presented in the thesis. Basic topologies of switching power supplies, their properties, application area and functions of basic types of converters are also described. The next section focuses on special resonant switching power supplies and synchronous. The main part of the work is carried out simulations using three synchronous rectifiers. The work includes practical design of an SMPS with synchronous rectifier.
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Usage of High Power Inverters in High Voltage Sources
Zemánek, Miroslav ; Janča, Jan (referee) ; Boušek, Jaroslav (referee) ; Patočka, Miroslav (advisor)
This work is concerned with power inverters for alternate high voltage power sources. The theoretical part describes the topology of inverters that can be used in alternate power sources. A model of voltage transformer is described in details to better understand the parasitic effects that are inevitably present in high voltage power sources and, therefore, have to be taken into consideration at the design of high voltage power sources. The work is oriented to problems of alternate high voltage power sources for ozone generators. This is the reason, why the theoretical and, partially, also the experimental part deal with the properties of ozone and its use. The experimental part solves high voltage inverter with capacitive load that is formed by discharge element of an ozone generator. Designed inverter is able to feed the capacitive load with high voltage at very short periods of time from several microseconds up to tens of nanoseconds. In comparison with the length of voltage pulses in common ozone generators, this pulses are more than 100-time shorter. This has a positive effect to silent discharge characteristics.
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Experimental switching supply source with power GaN MOSFETs
Matiaško, Maroš ; Martiš, Jan (referee) ; Vorel, Pavel (advisor)
This master’s thesis deals with the design of the switching power supply on the principle of high frequency converter. The goal of this thesis is construction of converter which is using GaN MOSFET transistors and SiC diodes for switching. The converter uses two switch forward power supply topology. Unusually high switching frequency was chosen for the design with power transformer with open magnetic core. The outcome of this work is functional converter which is primarily intended for educational and demonstrational purposes. Multiple parts of this converter are divided into individual blocks, which can be further used for construction of other types of switching converters.
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Car power supply for notebooks
Cupák, Pavel ; Šotner, Roman (referee) ; Kubíček, Michal (advisor)
In these days, almost everybody has a laptop. It allows a simple moving of a work space and with a battery capacity of several hours the owner can work almost everywhere. However, the battery has to be recharged from time to time and a socket is not available everywhere. Often you need to recharge when travelling by car and it comes to mind to use the car socket. The bachelor thesis deals with design and implementation of switching power supply for recharging laptops from car socket. The power supply has an easily adjustable output voltage for a simple choice of the right power voltage of a laptop, which is visualized on the display. The power supply is driven by microcontroler ATmega8.
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Switching supply source 5,5kV/4,3kW with silicon-carbide semiconductors
Gabriel, Petr ; Patočka, Miroslav (referee) ; Vorel, Pavel (advisor)
This thesis is about to introduce the development of switched power supply with output voltage of 5,5 kV and power of 4,3 kW. This thesis directly follows the outputs of two previous semester projects. Main task is about to finish the development of remaining printed circuit boards and perform launching of all parts of developed power supply. Next necessary task is about to assemble a functional prototype of the supply using the developed parts, performing a series of measurement supply’s parameters and creating of technical documentation of mechanical part. There are all stages of supply’s development included in this thesis. From the first part, that describes various types of converters, through the design of all the supply’s parts, to final implementation of functional prototype. There are the results of measurement supply’s parameters at the end of this thesis.
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Laboratory Pulse Power Supply Controlled by Microcontroller
Chytil, Jiří ; Kubíček, Michal (referee) ; Šebesta, Jiří (advisor)
This project deals with design of switching laboratory supply controled by PIC microcontroler. It consist of three modules: control unit and couple of power modules. Each of the modul is controled by PIC18 microcontroler. Device should work autonomicaly or it can be connected with PC via USB. Output paremeters 0-20 V, 0-1 A. The device has been designed with regard to minimal power consumption.
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Controled laboratory voltage suplier
Vít, Tomáš ; Valach, Soběslav (referee) ; Macho, Tomáš (advisor)
The aim of my master’s thesis is the design and implementation of laboratory power supply with output parameters 0-25V and 0-2A and options to manage this resource by elements of the front panel or via a computer control program. Content is the theoretical analysis of the possibility of subsequent theoretical sources suggesting that it verified on the prototype laboratory resources.
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