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Análise de estabilidade de retificadores com correção de fator de potência empregando modelos lineares periódicos no tempo
(Universidade Federal de Santa Maria, 2012-07-30)
Many control techniques applied to converters with power factor correction (PFC) use
cascaded control to compensate the output voltage and the input current. These techniques
usually employ linear time-invariant (LTI) ...
Previsão de tensão em sistemas de distribuição considerando as possibilidades das redes inteligentes
(Universidade Federal de Santa Maria, 2012-11-09)
With the deployment of Smart Grids, the voltage quality has a new focus, and the ANEEL (National Agency of Electric Energy), Brazilian regulator organ, is able to improve its supervision activity. The electric energy ...
Alocação e dimensionamento de limitadores de corrente de falta para minimizar a influência de fontes de geração distribuída na proteção de sistemas elétricos
(Universidade Federal de Santa Maria, 2012-07-27)
This dissertation presents the development of methodologies that aim to reduce the effect of distributed generation sources in the protection of electric power systems. First were analyzed problems associated with integration ...
Análise e projeto de uma topologia de dois estágios otimizada aplicada à iluminação pública com leds
(Universidade Federal de Santa Maria, 2012-07-10)
This work presents the analysis and implementation of a connection between two power converters, applied to street lighting with LEDs. This connection is called optimized
cascade. The main idea of this connection is the ...
Análise e projeto do conversor buck intercalado para alimentação de lâmpadas de descarga em alta pressão de alta potência
(Universidade Federal de Santa Maria, 2012-02-29)
This work presents a detailed analysis about the interleaved buck converter applied
to electronic ballasts to supply high power HID lamps, assuming the input voltage as a
PFC stage output.
As the output capacitor has a ...
Projeto e desenvolvimento de um sistema de gerenciamento remoto sem fio aplicado a iluminação
(Universidade Federal de Santa Maria, 2012-08-17)
Today's light sources are expanding the application field of lighting systems for decorative,
commercial and artistic purposes, in many areas, such as parks, gardens or parking.
This paper presents the development of a ...
A dimensão ambiental como objeto da ação extensionista na assessoria técnica, social e ambiental (ATES) do RS
(Universidade Federal de Santa Maria, 2012-11-01)
The environmental theme comes every day receiving attention and stands today as a
challenge for public policy and an important variable to be considered in the projects
of agrarian reform settlements and other rural ...
Instrumento de avaliação fonológica: validação de conteúdo
(Universidade Federal de Santa Maria, 2012-10-01)
In the pediatric population, the speech disorder is one of the most frequent changes that involve human communication disorders. But, in this area, there is a significant shortage of formal and objective instruments available ...
Caracterização das condições acústicas de salas de aula destinadas ao ensino da música na educação básica
(Universidade Federal de Santa Maria, 2012-12-31)
The acoustic inadequacy in an environment for teaching and study of music can trigger problems in the process of learning music, because the music content or the speech itself, can be modified, creating possibilities of ...
Competências de enfermagem no tratamento da dependência química: um estudo bibliométrico: 1999 - 2011
(Universidade Federal de Santa Maria, 2012)
The addiction is considered a serious and complex health problem. Talk about
addiction is to discuss the health / disease process, considering the models that
contribute to the understanding of the phenomenon at the ...