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The temperature measurement with semiconductor sensor
Dostálek, Martin ; Klíma, Bohumil (referee) ; Huták, Petr (advisor)
This bachelor work disserts on measurement of temperature using the electronic temperature sensors DS18B20, which are controlled by microcomputer type AVR. This sensors use for communication the 1-wire type data bus. The 1-wire data bus, designed by Dallas Semicondoctor, allows connect more devices to the control unit using two wires. This type of measuring elements offers simple handling for the user. The sensor transforms the measuring data directly to the digital data. The rate of the transmission is determined by number of bits in the resultant value and the sensor is programmable during attendance by the set mechanism (master). The sensor code is consistent with the value of measured temperature. That means it doesn’t require supplemental decoding. The resulting data are worked up and displayed on LCD continuously. First part of this work is focused on the theory of 1-wire element. Further, there is an explanation of the principle of the measuring sensor function and its controlling by the control unit. Next, there is a basic description of the AVR type microcomputers, more detailed description is aimed at the ATiny2313 controller, which is used in this work. The important part is dedicated to the implementation of the 1-wire protocol to the appropriate control unit.
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Electronic load
Doležel, Jiří ; Vorel, Pavel (referee) ; Huták, Petr (advisor)
Bachelor’s thesis deals with the analysis solutions and construction of the DC electronic loads. At the beginning, they describe the basic principles of electronic loads. In other parts of the work is compared commercial electronic loads, under which the requirements will be selected on the proposed electronic load. In other chapters of the work devoted to the design of schemes and selecting components for their manufacture, including dimensioning of cooling power parts. The last chapters are devoted to describing the design and measurement of electronic load.
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Miniature charger for a battery pack Li-ion 14,4V/2Ah
Bartoš, Miroslav ; Huták, Petr (referee) ; Vorel, Pavel (advisor)
This bachelor‘s thesis describes the design chargers for lithium-ion batteries. The proposal includes the selection of suitable converter topologies, design power, control and excitation components and a design of high frequency transformer. In the next part the thesis deals with the BMS, which stands for battery management system. The last part deals with the production of the proposed switching source and BMS. The project documentation for the production of a charger is also provided.
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Experimental flyback switching supply 1200 W/150 kHz with SiC switches
Grom, Martin ; Huták, Petr (referee) ; Vorel, Pavel (advisor)
This master’s thesis deals with design and construction of experimental flyback converter with utilization of novel lossless clamp circuit for switching transistor and with utilization of silicon carbide devices. The issue of flyback converter for higher power and possible control strategies are discussed. The thesis also describes power and control circuits design, design of PCB, construction of the converter and measured waveforms. End of the thesis contains technical documentation of designed board. Designed converter was successfully built and tested.
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Regulated power supply 50V/5A
Herman, Tomáš ; Vorel, Pavel (referee) ; Huták, Petr (advisor)
Bachelor´s thesis deals with the adjustable DC voltage source. The first part deals about the typical involvement of resources and consequently the properties of individual components resources. The second part is the actual design of control circuits, selection of components, wiring and PCB design.
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Analyzing measured data in MATLAB
Loup, Martin ; Pazdera, Ivo (referee) ; Huták, Petr (advisor)
Analysis of the measured data is an integral part of each measurement. The focus of this bachelor's thesis was to facilitate the processing of results of measurements. Therefore an application was created that can retrieve the data from the file and further analyze them. The application is thus able to create a variety of graphical dependencies, to calculate a new variable from the loaded values, save all variables, to determine the basic parameters of the signal or convert a signal to another signal type.
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Simulation of multilevel converters
Strieš, Jakub ; Huták, Petr (referee) ; Lažek, Tomáš (advisor)
This bachelor thesis deals with the search of multilevel voltage converters. The aim of the work is to acquaint the reader with the basic topologies in the first part and to simulate selected events on some of them in the second part. Topologies with clamping diodes, floating capacitors, cascaded H-bridges and modular MMC converters are presented. The simulations are performed for the last two mentioned topologies. The PWM methods used in this topic are also described. The results of individual simulations are presented in the final part in the form of graphs. Together, four events were simulated, namely direct connection to the network, start-up by ramp, failure of one phase and disconnection of the load. A block simulating an asynchronous motor was used as a load for the models.
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Levitation electromagnet
Kadlec, Michal ; Huták, Petr (referee) ; Patočka, Miroslav (advisor)
This bachelors work deals with magnetic levitation and design of the electromagnet. The design of the electromagnet is a demand for a minimum amount of constructionand is performed in two ways. It also made a proposal of a mathematical model of the magnet control circuit and control simulation. The knowledge gained can be used tothe design of the electromagnet in engineering practice.
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AC and DC current sensors
Zimek, Alois ; Huták, Petr (referee) ; Patočka, Miroslav (advisor)
The aim of this master’s thesis is to focus on analysis of a current transformer with feedback correction of measuring error, make an AC current sensor and verify its qualities experimentally. The measuring scale of this transformer is I = 0 to 100A, f = 50Hz.
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DSP56800 microprocessor line usage for asynchronous motor control
Kukuczka, Adam ; Huták, Petr (referee) ; Klíma, Bohumil (advisor)
Tato diplomová práce pojednává o možnostech simulace a modelování elektrických pohonů na základě Bondových grafů. Je zde uvedena základní teorie k problematice. V práci jsou představeny modely stejnosměrného a synchronního stroje sestavené touto technikou. Dále je zde seznámení s Freeware knihovnou Bondových grafů BG V2.1 k programu MATLABSimulink. Za pomocí této knihovny byly sestaveny oba modely strojů. V poslední kapitole je uvedeno srovnání modelování na základě teorie Bondových grafů s modelováním v blokových diagramech.
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