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Mikroprocesor control for laboratory power source
Hauer, Petr ; Kubásek, Radek (referee) ; Szabó, Zoltán (advisor)
This bachelor thesis aims to design and implementation a laboratory power supply controlled by microprocessor and PC via USB. The theoretical part describes the USB bus and the manner of its implementation to the microprocessor. There are the basic types of switching and linear sources and methods of control by a microprocessor. The practical part deals with the design and implementation of the resource. The results of this work are the themes of control and power part of power supply, printed circuit boards, software for the PC and microprocessor and measurements on the completed source.
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Miniaturized Measurement System for Wind Speed Estimation.
Štěpánek, Michal ; Vágner, Petr (referee) ; Urbanec, Tomáš (advisor)
This thesis is analysis of thermal anemometer, which contains design and realization. For measuring wind speed there are not used any mechanical moving parts in this way. This measuring uses two thermistors. One of these measures temperature of air, which is very important for compensation of whole system. Temperature of second thermistor is kept on constant value. This value is higher than surrounding air temperature about constant difference. Fluctuant air cools this sensor and because of that systém must supply more of heat. By analysis of value of supplied heat, we can calculate the wind speed value.
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Design of class D audio power amplifier for home use
Raba, Jaroslav ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
This thesis describes the design and construction of a complete audio power amplifier 2x100W of Class D. The proposal contains an active correction preamplifier unit, a power supply unit and indicator unit of the amplifier excitation. The power amplifier is composed of an integrated circuit TAS5611A from Texas Instruments. The correction preamplifier is controlled by four potentiometers. Excitation of the amplifier is displayed using LEDs. Basic parameters are measured and evaluated for all blocks of the amplifier.
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Adjustable source feeded and controlled by USB bus
Staněk, Miroslav ; Frýza, Tomáš (referee) ; Kolouch, Jaromír (advisor)
The aim of this bachelor’s thesis is concept and realization of voltage source which is controlled and feeded by Universal Serial Bus. There will be presented whole design, execution, development progress and finalization of this project in the following text. This source must boost and buck standard voltage from USB. So it will be necessary using two source lines. Microcontroller of AVR family will be used in the direct part of this adjustable source. Into this microcontroller will be embedded USB interface by the software solution. The microcontroller isn‘t used only for communication with PC by the computer programme, but it is also used for switching the source lines by the PWM modulation. According to the minimum output voltage scale (0 – 15 V) this source is useful for a wide spectrum of low- power devices. This equipment could be helpful together with laptop to charging devices (cell phone, camera, pocket osciloscope etc.), which are carried with notebook for doing outdoor activities and measurements.
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Laboratory module of class D amplifier with PWM modulation
Barcík, Peter ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor’s thesis describes basic functional blocks of class D audio amplifier. Project also discuss about design of module class D audio amplifier with PWM modulation. As this audio amplifier is going to be a laboratory module, it is necessary to divide design into designs of individual functional blocks. Finally project describes design of output LC filter which is also simulated in PSPICE program. This thesis include complete construction details. Measurement results are shown in standard protocol.
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Control of power LED, using ATtiny
Sedláček, Michal ; Pust, Radim (referee) ; Zeman, Václav (advisor)
The bachelor thesis deals with designing DC/DC steep-down converter, intended to supply power LED from a lithium-ion batteries. Work on the preface introduces the reader to the functions and the requirements for the proposed facility. Steep-down converter is controlled by a microcontroller suitably selected from ATtiny family. In this work are gradually dismantled partial circuit solutions, from which is then compiled a complete circuit. Is analyzed in detail the proposal steep-down power circuit converter. Work also includes the program for microcontroller and PCB design for the final circuit solution. In conclusion, this work is carried out measurements on the sample the proposed facility.
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Construction of class T audio amplifier
Tejmlová, Lenka ; Slezák, Josef (referee) ; Petržela, Jiří (advisor)
The aim of my bachelor’s thesis is to collect information about amplifiers, working in the T class. Because these amplifiers are usually used as digital power processing audio amplifiers, we mostly insist on the ability of sending, the signal without distortion, to amplify the frequency broadband signal, to obtain the high efficiency of the output stages and to obtain the peak quality of the sound. My task is to gather information and facts of principle of the function of the audio amplifiers working in the T class and reasonably priced integrated circuits of this class. Furthermore I am going to focus on the design of wiring of this amplifier with the 2x20 watts output, including the correction pre-amplifier, which provides correction of the heights, basses and volume. The amplifier is realized, in the end of bachelor’s thesis, there are measured it’s characteristics, which are compared to theory.
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Comlete design of class D power amplifier
Bistrý, Jan ; Šotner, Roman (referee) ; Petržela, Jiří (advisor)
In this bachelor's project was at first described a principle of class D power amplifiers. There was performed a characteristic of particular blocks. In the concrete steps were described particular solutions of these amplifiers with PWM driver, amplifier as an IC chip and were described advantages of this topology. It was performed an overview of the modern integrated amplifiers which are currently available. According to further requirements of this bachelor's project were designed a scheme and a board of printed circuit for this amplifier. In more details were described possibilities of output LC filter and performed its simulation. At the conclusion of this project was performed a laboratory measurement of realized amplifier which verified its performance and compliance with engaged parameters.
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Algorithms for the Control of the Induction Motor
Hundák, Vladimír ; Běloušek, Radim (referee) ; Patočka, Miroslav (advisor)
Hlavným cieľom tejto práce je vytvorenie simulácií rôznych algoritmov riadenia asynchrónneho motora a vzájomné porovnanie ich vlastností. Zaoberá sa taktiež možnosťami konfigurácie náhradného zapojenia na T-článok, -článok a -článok. Obsahuje jednak teoretický rozbor, a taktiež aj simulácie jednotlivých spôsobov riadenia spolu s podrobným návodom na ich realizáciu. Celkovo budú vykonané 3 simulácie – simulácia vektorového riadenia s orientáciou na rotorový tok, vektorového riadenia s orientáciou na statorový tok a simulácia takzvaného prirodzeného riadenia. Ide o úplne nový typ riadenia, ktorého autorom je vedúci tejto diplomovej práce. Jeho simulácia bola vôbec prvým pokusom o funkčnú realizáciu tohto typu riadenia.
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Iverter for three-phase motor
Mikuška, Martin ; Červinka, Dalibor (referee) ; Knobloch, Jan (advisor)
This master’s thesis goes into design of particular circuits for three phase inverter. Inverter’s control is ensured by digital signal controller MC56F8013 with his program. Principle of control is suggested for individual motors. Inverter design considerate universal use and capability for any three phase motor. Particular blocks are compatible each other.
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