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Modelagem e acionamento de diodos orgânicos emissores de luz (OLEDs) para sistemas de iluminação
(Universidade Federal de Santa Maria, 2015-08-26)
This thesis presents the study and characterization of organic light-emitting diodes
(OLEDs) with the proposal of obtaining an equivalent model that is useful in the OLED driver
design and in lighting systems projects. ...
Novos métodos de estimação de estado multi-área com potencial aplicação em redes elétricas inteligentes
(Universidade Federal de Santa Maria, 2015-03-06)
The smart grid will enable a revolution in the way we manage and relates to the distribution networks through intelligent applications. For many of these applications, it is understood that one of the primary activities ...
Desenvolvimento de topologias com redução do processamento redundante de energia para acionamento de leds
(Universidade Federal de Santa Maria, 2015-08-26)
This work presents the research and development of a connection method for static converters,
called Optimized Cascade, which aims to reduce the redundant power processing in
multiple stage topologies for LED driving. ...
Modulação space vector para conversores multiníveis com células assimétricas em cascata sob condições de faltas
(Universidade Federal de Santa Maria, 2015-10-09)
This Thesis proposes a Space Vector Modulation for cascaded miltilevel converters with
asymmetric cells under normal conditions and with faults in the power cells, avoiding
converter saturation as much as possible. The ...
Combinação seletiva de métodos para previsão de demanda a curtíssimo prazo em tempo real
(Universidade Federal de Santa Maria, 2015-03-06)
In transforming the current electricity network, in a so called smart grid, demand forecasting
is relevant to processes such as demand management, demand response, distributed
generation, among others. For consumers, the ...
Controle robusto baseado em desigualdades matriciais lineares aplicado a inversores conectados à rede elétrica
(Universidade Federal de Santa Maria, 2015-04-24)
This work provides as a main contribution a procedure to design robust state feedback
current controllers applied to inverters connected to the grid by means of LCL filters,
providing results which comply with performance ...
Contribuições ao controle do motor síncrono de ímã permanente com FCEM não senoidal
(Universidade Federal de Santa Maria, 2015-08-20)
This thesis presents contributions to the sensorless vector control of Permanent
Magnet Synchronous Motors (PMSM) with nonsinusoidal back Electromotive Force (back-
EMF), whose magnets are allocated on the rotor surface. ...
Pesquisa sobre o efeito de fenômenos solares no potencial energético solar-eólico
(Universidade Federal de Santa Maria, 2015-09-11)
This thesis analyzes the monthly data from historical series of the heat stroke
cycles, solar radiation and average wind speeds in the 1961 and 2008 period to
identify long-term inaccuracies in the location of both wind ...
Controle sem sensores mecânicos para gerador síncrono a ímã permanente
(Universidade Federal de Santa Maria, 2015-07-29)
This Thesis proposes sensorless vector control schemes that combine designed
observers in the discrete-time domain to estimate the rotor position and speed for a
permanent magnet synchronous generator of non-salient ...
Compensação das formas de onda distorcidas pela saturação de transformadores de corrente com auxílio da estimação de frequência
(Universidade Federal de Santa Maria, 2015-03-02)
This work presents innovative methods for detection and correction of the distorted portions of the secondary current waveforms, which occur due to the core saturation of current transformers (CTs). The detection technique ...