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Precise adjustable power suplly
Pawlas, Andrzej ; Magát, Martin (referee) ; Kadlec, Jaroslav (advisor)
This bachelor´s thesis deals with the proposing precise switching power supply. This switching power supply works with a maximum of 99 % duty cycle. Input voltage is 12 V and output can be set in the range of 1.2 V - 11.9 V. Current can be a source of burden 0 A - 20 A. The entire power supply is controlled by microcontroller. While addressing the proposal switching power supply have been developed five prototypes. Last prototype works well, but the output appeared significant interference.
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Laboratory tool with power supplies
Grufík, Adam ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
The aim of this work is to become familiar with different kinds of commonly used power supplies, measure and compare their properties and then design laboratory teaching board with multiple supplies. The designed instrument can be used for educational purposes and as a demonstration in the field of voltage sources.
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Controled laboratory voltage suplier
Vít, Tomáš ; Valach, Soběslav (referee) ; Macho, Tomáš (advisor)
The aim of my master’s thesis is the design and implementation of laboratory power supply with output parameters 0-25V and 0-2A and options to manage this resource by elements of the front panel or via a computer control program. Content is the theoretical analysis of the possibility of subsequent theoretical sources suggesting that it verified on the prototype laboratory resources.
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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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Design of synchronous switched-mode power supply for automotive
Sedlák, Jakub ; Šebesta, Jiří (referee) ; Kubíček, Michal (advisor)
This bachelor´s thesis deals with the DC/DC convertors and their application in automotive lighting. In first part of thesis, there are mentioned DC/DC convertors, their basic topologies and synchronous rectification. In next part of thesis, there are compared selected integrated circuits, which are suitable for this application. For one of these circuits is created a design. For this design was created a simulation to find out, that design is working. This design was realized and was tested according to automotive standards. In the end, there is a working DC/DC convertor, which meets requirements and basic limits from automotive standarts.
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Models of switching power supplies in MATLAB-Simulink
Procházka, David ; Pazdera, Ivo (referee) ; Huták, Petr (advisor)
The Bachelor’s thesis is focused on the issue of models of switching power supplies. The first part describes the principle of switching power supplies. The second part is devoted to the design of the drive parameters and appropriate regulatory circuit. The last section is devoted to developing models of switching power supply in the MATLAB using the Simulink block Power system.
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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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Electric motorbike traction drive
Bartoš, Jiří ; Vorel, Pavel (referee) ; Martiš, Jan (advisor)
This work deals with complete designing of electric drive for lightweight motorcycle. There are mentioned options of electric drive and types of batteries. One solution for Jawa 50/555 motorcycle frame is picked. In this work are measured losses of traction motor and cooling system is modified. There are some necessary calculations of drive. In next part 10S6P Li-ion battery with balancer and undercharge controller is realized. In this thesis design of step – down converter with current control is described, cooling and PCB is proposed. Complete converter with cover is made.
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Electronic skylight
Coufal, Martin ; Šteffan, Pavel (referee) ; Boušek, Jaroslav (advisor)
Theoretical part of this thesis describes LEDs and other circuitry used for LED light design. LED light is designed, manufactured and put into operation. This thesis examines possibilities of measuring exterior light and its key parameters. The device uses two sets of LEDs – warm white and cold white to create light with parameters dependent on exterior light. LEDs are driven by constant current sources that are designed, manufactured and examined in this thesis. The device is microprocessor-controlled, which allows to switch between multiple modes of operation. Flyback SMPS is used to power the microcontroller.
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