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Pravidla návrhu elektronických přístrojů s jednočipovými mikropočítači ATMEL z hlediska EMC / Design Rules for Electronic Systems with ATMEL Microprocessors from the EMC Point of ViewKaštan, Jiří January 2008 (has links)
This diploma thesis is dealing with the basic knowledge of the Electromagnetic compatibility. It’s concretely target on electromagnetic interference flowing from the application of electronic gas control by Honeywell company. Author compile the power control board with including software in language C. The next alternates of power control board with the separated microprocessor were designed for the more extended source detection. On these boards there were explored shielding surface features placed directly under the microprocessor. The application reducing the interference was designed in accordance to the rules finding out during this diploma thesis writing.
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Univerzální napájecí zdroj s mikrokontrolérem / General-purpose power supply with microcontrollerJorda, Ivo January 2014 (has links)
The aim of this thesis is design of adjustable switched mode power supply with symmetrical output of 25 V, and switched mode power supply with fixed output voltage of 5 V. Required maximum output current of each outputs is 3 A. At the beginning of the paper function of the basic SMPS topologies is described. Next all reqiured SMPSs are designed and chosen parts of the design are simulated. In the second half of the thesis assembly and testing of PCB are described as well as functions of programs. Last chapter contains results of meassurement of power supply paramters.
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Uma proposta de regulador automático de tensão microcontrolado para geradores síncronos isoladosAlves, Guilherme Henrique 16 September 2016 (has links)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Os sistemas de controle de excitação em máquinas síncronas devem detectar com
bastante rapidez as mudanças causadas pela entrada de carga no gerador isolado e atuar no
sistema de excitação de forma rápida e eficiente, para manter a tensão terminal em níveis
desejados. Ao contrário de outros trabalhos realizados nesta área com circuitos eletrônicos
analógicos, em muitos casos, este controlador pode ser construído utilizando tecnologia
microcontrolada por possuir alto nível de eficiência no controle, circuito com flexibilidade para
implementação de diferentes estratégias de controle e baixo custo para produção.
A abordagem deste trabalho consiste em uma proposta para aplicação de um controle
de excitação automático utilizando uma malha PID, com opções de controle manual,
monitoramento de tensão terminal e temperatura de estator da máquina, utilizando um
microcontrolador PIC16F877A da empresa Microchip Technology.
Os resultados obtidos a partir de ensaios práticos em laboratório com partidas diretas de
motores de indução (1 e 2 cv) com um gerador de 2 kVA mostra que a atuação do controlador
recuperou a tensão terminal em pouco tempo, para o setpoint adotado.
E por fim, os resultados obtidos foram comparados com os tempos de resposta de outro
conhecido regulador automático de tensão encontrado no mercado, para comprovar o bom
desempenho de controle deste projeto. / The excitation control systems in synchronous machines must very quickly detect
changes caused by load increase on the isolated generator and act on the excitation system in a
rapid and efficient way in order to maintain terminal voltage at optimal desired levels. Unlike
other works related with this area which used analog-based electronic circuits, this controller
can in many case be built utilizing microcontrolled technology which is more efficient and
flexible to implement different control strategies, as well as having a low cost of production.
The approach of this research consists in a proposal to apply an automatic excitation
controller, utilizing a PID control loop, including manual adjustments and monitorings of
terminal voltage and stator temperature of the machine. It employs a PIC16F877A
microcontroller from the Microchip Technology Company.
The results obtained through practical tests in laboratory with a direct online start of
induction motors (1 and 2 HP) on a 2 kVA generator show that the controller acts to recover
the terminal voltage to the adopted setpoint in a reduced time.
Finally, the results were also compared to the time of response provided from another
well-known automatic voltage regulator found in the market, in order to prove the good control
performance of this project. / Dissertação (Mestrado)
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Návrh a realizace mobilní fotovoltaické elektrárny / Design and Realization of Mobile Photovoltaic Power StationLednický, Ján January 2017 (has links)
This diploma thesis entitled Design and realization of a mobile photovoltaic power plant is dividet into two parts. In the first, theoretical part one can learn about the state of representation of renewable energy sources in the field of electrical power engineering and about the structure of photovoltaic power station systems. The secont part of this thesis is focused on the own design and realization of the mobile photovoltaic power plant, on the selection of individual suitable components and ther dimensioning. In addition, a model of a mobile power plant has been created, on the basis of which the power plant was constructed. Finally, one can find a source code analysis of a power plant monitoring using a microcontroler
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Web server pro vestavěné aplikace / Web Server for Embedded ApplicationsPirkl, Tomáš January 2007 (has links)
This work discuses Embedded Ethernet systems. Embedded Webserver Platform is designed. This design embrace microkontroler, Ethernet driver, and external SRAM. It includes implementation on PCB with MMC interface and software implementation of MMC driver and FAT file system. Reference model ISO/OSI, reference model TCP/IP, Ethernet and UDP, TCP, IP, HTTP protocol is presented.
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