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Low-frequency Amplifiers
Doležel, Tomáš ; Vorel, Pavel (referee) ; Patočka, Miroslav (advisor)
The bachelor thesis deals with the involvement of the audio amplifier, design printed circuit boards, implementation and verification of measuring amplifiers. The proposed amplifier has an output of 100 W at nominal load 4 at a supply voltage of ± 30 V. The bandwidth of the amplifier is 550 kHz.
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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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Magnetic fields for biomedical experiments
Otýpka, Jan ; Cipín, Radoslav (referee) ; Patočka, Miroslav (advisor)
In this work deals with magnetic fields for use in biomedicine. This solution involves the choice of the correct geometric arrangement of coils for generating magnetic field with a homogeneous distribution of magnetic induction of the widest possible area. The paper compares thre traditional types of coils, solenoid, toroid and Helmholtz coil. For Helmholtz and solenoid coil and is then carried out an analysis of the magnetic flux density in the inner space. Next part is devoted to electrical resonance in the LC circuit. This is then utilized for the development of pulsed magnetic field in the Helmholtz coil. It summarizes the theoretical and practical knowledge to design and construction of resonant converters. The end is devoted to the measurement of circuit parameters and verification of theoretical knowledge.
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Bicycle path between Kunovice and Uherske Hradiste
Veselý, Libor ; Patočka, Miroslav (referee) ; Smělý, Martin (advisor)
The aim of this bachelor thesis is to design a bike path between Kunovice and Uherské Hradiště. Bicycle path will serve to cyclists and pedestrians. The design is based on the results of a traffic survey and takes into account the placement of bike paths already present in the area and the local conditions. This project is not concerned solely with the route itself, but also addresses other issues, such as ecology (minimalising the impact on landscape, water infiltration), cost-effectiveness or comfort and safety (illumination of the path, traffic sign placement).
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Improvement of traffic accessibility of city Měčín
Votípka, Jakub ; Smělý, Martin (referee) ; Patočka, Miroslav (advisor)
The goal of bachelor´s work is proposal of the relocation of road II/117 in the town Měčín, which has insufficient width organization at the entry to the town. Newly created road is designed in sufficient width organization and acts as main arrival road to the town. The newly created residential zone is connected on the road and it is a plan to connect also connecting road with planned sewage treatment plant.
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Laboratory test equipment for IGBT transistors
Chvátlina, Pavel ; Vorel, Pavel (referee) ; Patočka, Miroslav (advisor)
This master’s thesis describes the function and realization of the laboratory test equipment designed for measuring and analysing of collector current iC and voltage uCE courses during the opening and closing process of a power IGBT transistor. The opening and closing times toff and ton of the new power transistor IGBT are changing in the range from tenths to the ones s, so the reading of current iC and voltage uCE proceeds in a very short time. The measuring circuit of this test equipment is based on a short-time discharging of a condenser battery to the inductive load over the measured transistor. Consequently it is possible to replace the power supply whose maximum output power would otherwise have to be in the range of ones MW. In the final part of this thesis there are described properties and design of a high-frequency sensor with the Rogowski coil, which can be used for reading collector current course during opening and closing time of the measured transistor IGBT. Collector current iC and voltage uCE courses can be analysed with a storage oscilloscope.
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Modifying the bus station in the Moravska Trebova
Beneš, Petr ; Patočka, Miroslav (referee) ; Smělý, Martin (advisor)
The content of bachelor thesis is adjustment of current bus station including existing indeterminate paved surfaces designed for spontaneous parking in its surroundings. Thesis includes adjustment roads for pedestrian traffic, wich increases its security and construction a new surfaces of green areas for restoration environment of the bus station.
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Design of the electric locomotive drive
Dočekal, Martin ; Klíma, Bohumil (referee) ; Patočka, Miroslav (advisor)
The focus of the work is the calculation and design of battery-powered drive of locomotive, operating in the sub-siding mode, ie when the locomotive is moving on the track section without the overhead line. The proposed battery groups to ensure the drive train will be installed directly into the locomotive engine room. In the theoretical part of the work there has been done the analysis of the electrical locomotives and electrical unit, which nowadays are used in the Czech Republic in driving of voltage controller with the integrated circuit. Then, in the chapter there is a brief description modern locomotives frequency convertor’s and rectifier’s function. The practical part of the work contains the necessary force and energy calculation for train moving on the determined rails. On the base of the received data, the design of battery groups has been done. These battery groups will work as an independent traction which insures the moving of the train on the determined rails. In the work the design, which consists of STEP-UP and STEP-DOWN convertors, has also been done. The power model and model management were created in Matlab Simulink programme. Data and graphs exported from the Matlab Simulink programm are determined for verifying convertor’s function, which can be found in a separate chapter. In addition to the proposal of the battery drive is at work also has been calculated loss of traction rectifier during normal operation of the locomotive, ie outside siding mode. For this calculation, in the conclusion is listed the theory of calculation of the losses incipient in the transistor and freewheeling diode of rectifier. According to the theory own calculation is performed. Subsequently the liquid cooler calculation of the rectifier is calculated.
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Converter for supplying of the power LED diode
Puczok, Václav ; Huták, Petr (referee) ; Patočka, Miroslav (advisor)
The aim of this thesis is to design a grid-powered supply for supplying power LED used in illuminating application. The power supply consists of an input line filter which attenuates conducted high frequency signals (EMI filter), an active rectifier (PFC circuit) to improve the power factor and the main constant output current double-sided forward converter. It thoroughly focuses at design of the converter's power stage, mainly at pulse transformer, switching transistors, output rectifier and output filter. Main converter model was created in the Matlab-Simulink environment in order to simulate behaviour of the current loop. Final product of this work is a fully functional power supply and the main converter's model.
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Power converter for artificial power net
Picmaus, Michal ; Procházka, Petr (referee) ; Patočka, Miroslav (advisor)
Diploma work deals with a converter design for an artifical power net. There is described analysis of possible solving of this converter. Next there is contained dimension of components force circumference converter, design of filtres and converter regulator. Project deals with simulation of dynamical qualities for an output changer device in settings Matlab Simulink. In this work there is even a design power board alternator, wakers and directing of alternator.
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