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LED bicycle lights
Čmelík, Matouš ; Patočka, Miroslav (referee) ; Huták, Petr (advisor)
In semester thesis i project bicycle lighting using LEDs that are powered from the alternator. The LEDs are powered also from battery, that is recharged while driving and when you stop it enable uninterrupted lighting. The concept is designed so that the final price is as low as possible. All things is designed to insert to the existing bicycle lightint on Eska or Favorit bicycle. The use of inverters ensures high efficienty of the whole concept. Using LEDs compare to standart solutions with bulbs is more efficienty to.
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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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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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Educational tool with power supplies
Junasová, Veronika ; Šteffan, Pavel (referee) ; Levek, Vladimír (advisor)
This work deals with design and realization of board with numerous power supplies. It includes linear power supply, switching supply without inductor, switching supply with inductor using step-up and step-down converter. The board allows to choose between various output voltages, several input filters, output filters, loads and it enables to measure the temperature of used power supplies. It can be used for education and practical demonstration of basic properties, advantages and disadvantages of these supplies. Part of the thesis is a description of power supplies for low voltages, design of educational board and demonstration of results.
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Low Power High Voltage Step-Down Converter
Folprecht, Martin
This article refers about problematics of DC/DC converters. Basic topologies of DC/DC converters with and without pulse transformer are mentioned in this article. There is also a focus on some IC drivers and controllers used for converters without pulse transformer. The main part of the article is reserved for the description of the step-down converter powered from voltage in excess of 100 V, which is able to work in application, where special IC controller cannot be used.
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Smart Li-ion Batery
Prachař, Vojtěch ; Burian, František (referee) ; Kopečný, Lukáš (advisor)
The thesis deals with lithium accumulators with electronics, which are composed to a unit called Intelligent Battery. Within this thesis, the main features of these accumulators are explained and the circuit to monitor these accumulators has been designed and manufactured, it can disconnect them when the parameters are exceeded, and it stores the history of the battery measurement in memory. It also allows reading of current and logged battery data via UART. The computer application is designed for communication, to display the information and to adjust the battery circuit parameters. The electronics secure charging when the 24V adapter is connected according to the set parameters and it also secure balancing of the individual accumulators.
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LED bicycle lights
Čmelík, Matouš ; Patočka, Miroslav (referee) ; Huták, Petr (advisor)
In semester thesis i project bicycle lighting using LEDs that are powered from the alternator. The LEDs are powered also from battery, that is recharged while driving and when you stop it enable uninterrupted lighting. The concept is designed so that the final price is as low as possible. All things is designed to insert to the existing bicycle lightint on Eska or Favorit bicycle. The use of inverters ensures high efficienty of the whole concept. Using LEDs compare to standart solutions with bulbs is more efficienty to.
|
|
|
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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Microprocessor controlled BLDC motor inverter realization
Mikuška, Martin ; Cipín, Radoslav (referee) ; Knobloch, Jan (advisor)
This bachelor’s thesis goes into electronic commutated motors, their inverters and specific parts of the general pulse converter. Next it is described step-down converters, push-pull converters and the principles that are supported by practical exercises. The next part describes the design of the power transistors driver and problems of galvanic separation by optocouplers.
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