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AC voltage converter
Bérceš, Erik ; Procházka, Petr (referee) ; Toman, Marek (advisor)
The bachelor’s thesis deals with an AC voltage converter with an input voltage Uin = 50 V and output current Iout = 5 A controlled by the processor Arduino. The assignment concentrates on theoretical knowledge of the AC voltage converter, phase control of triac and on the semiconductor devices which are its main components. The main task of the thesis is proposition and realization of an AC voltage converter which will be used for the laboratory work in the Power Electronics course. The thesis contains software which enables controlling the converter as well as verifying its functionality.
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Versatile Control Unit of Solar Collectors
Tříska, Vít ; Růžička, Richard (referee) ; Šimek, Václav (advisor)
This thesis deals with design and implementation of a versatile control unit, which is primarily designed for control of solar collectors. It describes the various stages of design. First, the system of solar collectors is introduced. Its input-output parts are analyzed and the requirements are determined for the control unit. The characteristics of temperature sensors are examined, the work deals with continuous variable speed circulators. The following part is dedicated to hardware and software implementation of the objectives of the work. The boards were designed in Eagle design environment, the firmware was written in C programming language. In conclusion, the evaluation of the results of the proposed system and possible ways of its further development are discussed. The versatile control unit can be deployed in practice realistically.
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Modelling and Design of the IC`s ESD Protection Structures
Běťák, Petr ; Sládek,, Petr (referee) ; Bartoň,, Zdeněk (referee) ; Musil, Vladislav (advisor)
The thesis introduces new semiconductor structures that are used as protections against Electrostatic Discharge occuring in integrated circuits. The fundamental structure for modeling and simulation has been lateral Silicon Controlled Rectifier. This SCR structure has been modificated to enable tuning of the triggering and holding voltages by changing geometrical mask dimensions. On the base of modeling and simulation the new proposed structures have been published. Also several protection structures have been designed to be manufactured and measured on a testchip. The final electrical behavior has been verified by measurement. Finally, the focus has been aided to protection circuit with bipolar transistor. This approach has been also simulated and verified by measurement. Advantages and disadvantages of the proposed protection structures are commented in the thesis.
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Temperature regulator
Fireš, Martin ; Richter, Miloslav (referee) ; Macho, Tomáš (advisor)
This work deals with design and construction of the temperature regulator with a resistive load as primarily. Each structural element is described by a theoretical part which is needed for further understanding and practical solution the thesis heads for. The current output for half-wave modulation is solved in PSD control loop using temperature measurement by DS18B20. Rotary encoder, character display or PC visualization are used to controlling and displaying.
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Universal control unit of technological processes
Gogola, Marek ; Vlach, Radek (referee) ; Krejčí, Petr (advisor)
This diploma thesis is about design and realization of universal control unit of technologic processes in food-processing industry. The main goal of this work is to create a device, which will be able with respect to desired values and using measured data autunomusly regulate output. In this work was done the realization of the control unit both from hardware and software aspect. Designed control unit is able to change the output power according to measured temperature. Furthermore is able to control of 2 relays. To set up the desired values and control of relays is used PC software.
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Intelligent lightning system
Harman, Ján ; Šír, Michal (referee) ; Bradáč, Zdeněk (advisor)
The aim of my master’s thesis is a system for control of the light intensity. It is electronic equipment which controls the intensity of the light circuits based on settings and input signals. This equipment could work on single-phase systems or multiphase systems. The equipment is controlled by the signal DMX-512 which is a standard for the control of lighting technologies. The set up of this equipment is based on a personal computer or in a limited form by a small connected display.
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Multilayer semiconductor devices
SEDLÁK, Jiří
There is illustrated principle of semiconductors in the first chapter. A description of three semiconductors elements transistor, thyristor and triac is in chapter two, three and four. The main target is to create multimedia material for study in form of www page for students in electrotechnics branch. These pages will be a part of the essay and also I will write it to CD and it takes place in university system eAMOS.
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