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Itens para a visualização no momento 1-10 of 28
Contribuições ao acionamento e controle sensorless aplicado ao motor de indução bifásico assimétrico
(Universidade Federal de Santa Maria, 2012-05-11)
This doctoral thesis presents the development of sensorless methods aiming the rotor
speed control of asymmetrical two-phase induction motors. Initially, the machine mathematical
model is presented. From the machine model, ...
Desenvolvimento de uma família de reatores eletrônicos para lâmpadas fluorescentes sem eletrodos empregando a técnica de integração de conversores
(Universidade Federal de Santa Maria, 2012-11-30)
This paper presents the design and development of an electronic ballasts family
obtained through the use of the integration technique of converters for feeding the
electrodeless fluorescents lamps (EFL). This type of lamp ...
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 ...
Hierarquização de alimentadores para fins de manutenção utilizando análise multicriterial
(Universidade Federal de Santa Maria, 2012-01-20)
The system of distribution of the power utility started to face new challenges with the
regulations of the Brazilian electric sector through the National Electric Energy Agency
(ANEEL). The agency, through resolutions ...
Roteamento geográfico para redes de sensores e atuadores sem fio em redes urbanas de comunicação
(Universidade Federal de Santa Maria, 2012-05-25)
Smart grids and smart utility networks are the next-generation utility networks that
intend to provide efficient control and management of utilities such as electricity, natural
gas, water and sewage. Communication ...