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Contribuições ao acionamento e controle dos motores de relutância variável e síncrono de relutância
(Universidade Federal de Santa Maria, 2019-02-15)
This master thesis presents contributions to the driving and control of switched
reluctance motors and synchronous reluctance motors. The main characteristics of the
switched reluctance machine are the low production ...
Metodologia de projeto de um inversor ressonante auto-oscilante operando em alta frequência para aplicações a LED.
(Universidade Federal de Santa Maria, 2019-02-05)
In this dissertation, a design methodology is proposed for the Self Oscillating Resonant Converter operating in high frequency for LED lighting aplications. The high-frequency operation of electronic circuits has, as the ...
Técnicas para otimização de conversores da família boost com alto ganho de tensão e alto rendimento aplicados à célula a combustível
(Universidade Federal de Santa Maria, 2019-02-28)
In this work, it is proposed methodologies for design optimization of high gain boost static converters
applied to fuel cells. In this aplication, two types of boost converters are evaluated.
The first one is based on ...
Controle individual de passo para turbinas eólicas utilizando controlador adaptativo
(Universidade Federal de Santa Maria, 2019-02-26)
This Master Thesis deals with the problem of reducing the resulting asymmetrical
mechanical loads on the structure of large wind turbines, with horizontal axis and three
blades, by means of individual pitch control of ...
Monitoramento e acionamento remoto da movimentação e arrefecimento de painéis fotovoltaicos para maximização da potência e eficiência
(Universidade Federal de Santa Maria, 2019-03-07)
The world's electricity consumption increases every day along with concerns about the
environment. In order to supply the increase in the demand for electric power in Brazil there
has been in recent years a great expansion ...
Estratégias de controle para grupo motor-gerador a etanol operando com velocidade variável
(Universidade Federal de Santa Maria, 2019-02-28)
This master thesis presents two strategies for speed control and power generation
by a variable speed ethanol generator set (genset), where the power generated is reflected
in the current of the battery bank. Initially, ...
Análise da transferência de ondulação de baixa frequência em drivers de LEDs
(Universidade Federal de Santa Maria, 2019-03-01)
This work presents the analysis of low frequency ripple transmission from the bus voltage to the output current in LED drivers, in the power control stage. The buck, boost and buck-boost converters, operating in discontinuous ...
Controle de demanda e formação de microrredes com grupos moto-geradores distribuídos
(Universidade Federal de Santa Maria, 2019-04-16)
The present work developed a methodology that was applied in a study that had as a starting point the peak shaving of an electrical installation, aiming at the reduction of costs with the energy bill. To achieve this, the ...
Avaliação do desempenho dos métodos de proteção contra a perda de excitação em geradores síncronos: uma contribuição para a melhoria da técnica baseada em combinações de sinais
(Universidade Federal de Santa Maria, 2019-07-19)
This work aims to evaluate the behavior of synchronous generators against total (TLOE)
and partial (PLOE) loss of excitation, to demonstrate the behavior of the main electrical variables
involved, to analyze the performance, ...
Circuito para monitoramento e restabelecimento da tensão elétrica em células a combustível tipo PEM usando curtos-circuitos controlados
(Universidade Federal de Santa Maria, 2019-03-31)
Electricity generation from renewable sources can contribute significantly to mitigate the impacts that non-renewable sources have on nature. Of these, hydrogen power generation is of great interest and can be easily ...