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Universal LED Source for testing of the light guide properties
Feilhauer, Jaromír ; Chmela, Ondřej (referee) ; Novák, Lukáš (advisor)
This bachelor thesis deals with the design of the LED source for testing the properties of light guides of car headlights. The thesis mainly includes the theory of the DC - DC converters, their categorization and the basic properties of the individual types of circuits. The design part is focused on the selection of the required chips. The importance of the chip as the basic description, characteristics and calculations of the values associated components are included. Then it follows with the design of the circuit diagram and the printed circuit, software and communication packet development and measurement results of real sample.
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Nixie clock
Ščípa, Samuel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
This thesis focuses on the design and implementation of a nixie clock. In the introduction, the thesis deals with the history of the origin and the principle of the function of this vintage technology. It describes in detail the function and design of the support and control circuits to operate these character discharge tubes. It addresses the design and implementation of the hardware part of the clock. Further, the software part of the device is discussed in detail, which provides the normal functionality of the clock, such as stopwatch, alarm, timer, temperature measurement, supplemented with modern features such as Wi-Fi, RGB backlight a USB-C for power and programming. The final stage is the implementation and testing of the finished device.
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Electronic ballast for power LEDs
Vágner, Richard ; Martiš, Jan (referee) ; Červinka, Dalibor (advisor)
This diploma thesis deals with design of power LED driver. This driver contains electronic ballast circuits, converters, filters and control circuits. Overviews of circuits used in practice are listed along with analysis of power LED and considering options for selecting an appropriate design solution. Thesis describe principle of electroluminescense, creating of the device, its structure and problematics of current source supply. Including detailed overview of converters, ballasts and topologies used in lighting systems with the selection of a suitable solution for the final device with an output power of 50 W. The thesis contains cooling dimensioning for selected power LEDs, input circuit with EMI filter, bridge rectifier, boost converter and flyback converter with pulse transformer.
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Universal LED Source for testing of the light guide properties
Feilhauer, Jaromír ; Chmela, Ondřej (referee) ; Novák, Lukáš (advisor)
This bachelor thesis deals with the design of the LED source for testing the properties of light guides of car headlights. The thesis mainly includes the theory of the DC - DC converters, their categorization and the basic properties of the individual types of circuits. The design part is focused on the selection of the required chips. The importance of the chip as the basic description, characteristics and calculations of the values associated components are included. Then it follows with the design of the circuit diagram and the printed circuit, software and communication packet development and measurement results of real sample.
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Electronic ballast for power LEDs
Vágner, Richard ; Martiš, Jan (referee) ; Červinka, Dalibor (advisor)
This diploma thesis deals with design of power LED driver. This driver contains electronic ballast circuits, converters, filters and control circuits. Overviews of circuits used in practice are listed along with analysis of power LED and considering options for selecting an appropriate design solution. Principles of creating the device, structure and problems of current source are described in thesis. Including detailed overview of converters, ballasts and topologies used in lighting systems with the selection of a suitable solution for the final device with an output power of 50 W. The thesis includes cooling dimensioning for selected power LEDs, input circuit with EMI filter, bridge rectifier, boost converter and flyback converter with pulse transformer.
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DC/DC converters for industrial power supplies
Chudý, Andrej ; Cipín, Radoslav (referee) ; Procházka, Petr (advisor)
This diploma thesis deals with design and comparison of selected DC/DC converters, where the better of them is practically realized. The first part of the diploma thesis is focused on the general analysis of DC/DC power converters. The following part is theoretical analysis focused on the first selected topology – step-up converter. The second analysed topology is forward converter with full bridge on the primary side. The theoretical analysis also includes a description of synchronous rectifier, the differences between hard and soft switching, and the types of secondary rectifiers. Another part specializes in the detailed calculation of main components of selected converters and their subsequent power dimensioning. Both designed topologies are compared according to the required aspects. The selected better topology is supplemented by the design of control circuits and an auxiliary power supply. Practical realization of converter and commissioning follows. The diploma thesis ends with verification measurements on the realized converter and their subsequent analysis.
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DC-DC converter for matrix beam module
Sikora, Roman ; Dobesch,, Aleš (referee) ; Hudcová, Lucie (advisor)
The master thesis deals with the development of buck-boost DC-DC converter which supplies matrix beam module. The design is focused on testing two-phase boost converter and three channel buck converter manufactured by NXP Semiconductors. Part of the design is implementation of microcontroller for converter control and communication with computer. Part of the thesis is also to design user interface on Windows platform for easy system configuration. Next thing the thesis deals with is designing load for DC-DC converter that is variable and can make different current consumption. One part of this thesis is focused to achieve the lowest conducted emissions and to maximize conducted immunity. Part of this project is production of a prototype and prototype testing.
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Bicycle Additional Drive With A Combustion Engine
And An Electric Powertrain
Doležal, Lukáš
The objective of this paper is power converter design for bicycle with combustion engine and electric power transmission. Converter is powered by a generator which is connected to the combustion engine shaft. The power converter is controlling by microprocessor and control algorithm is designed to achieve maximum efficiently of combustion motor. In this paper is described design of circuits, printed board, driving algorithm and mechanical arrangement of whole powertrain.
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Solar Power Inverter
Gottwald, Petr
Design of a solar power inverter with 1 kW output power capability is discussed in this paper. Interleaved boost topology used in the step-up stage as well as the output full-bridge stage are described. Control block utilizing Field-programmable-gate-array (FPGA) is described as well.
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