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Algoritmos heurísticos de otimização da proteção e manobra em redes de distribuição de energia
(Universidade Federal de Santa Maria, 2008-07-29)
The new regulations of the electricity sector have requested from the power utilities great performance
efficiency on their distribution systems, requiring more rigorous quality and continuity energy levels. In Brazil,
the ...
Contribuição ao estudo do acionamento avançado do motor síncrono de ímãs permanentes: abordagem baseada nos modos deslizantes de ordem superior
(Universidade Federal de Santa Maria, 2009-07-24)
This work presents a study of first and second order sliding mode controllers applied to permanent magnet synchronous motor.The aim is a theoretical study and an experimental implementation, using the DSP TMS320F2812 ...
Desenvolvimento de uma família de reatores eletrônicos para lâmpadas de multivapor metálico empregando a técnica de conexão diferencial de conversores CC/CC
(Universidade Federal de Santa Maria, 2009-02-25)
This work presents and analyzes a new family of electronic ballasts to supply metal halide lamps applied to interior lighting systems. These lamps present the best light quality among the high intensity discharge lamps, ...
Extração e reconhecimento de caracteres ópticos a partir do co-projeto de hardware e software sobre plataforma reconfigurável
(Universidade Federal de Santa Maria, 2008-03-07)
This work presents the implementation and analysis of a system devoted to the extraction and recognition of optical characters which is based on the hardware and software co-design methodology and built over a reconfigurable ...
Sistematização do projeto de reatores eletrônicos para alimentação de lâmpadas de vapor de sódio em alta pressão para iluminação pública
(Universidade Federal de Santa Maria, 2009-02-27)
This thesis presents an electronic ballast prototype to supply high-pressure sodium lamps used in public lighting. The goal is to develop a commercial approach able to replace the still commonly used electromagnetic ballasts, ...
Análise, modelagem e validação experimental de uma metodologia para o projeto do indutor em conversores Boost PFC
(Universidade Federal de Santa Maria, 2009-03-27)
This work presents the development of a methodology for design of inductor in singlephase PFC boost converters operating in CCM mode in agreement with international
standards IEC 61000-3-2 and CISPR 22. Such converters ...
Gerador de indução isolado com tensão e freqüência reguladas por conversor matricial esparso
(Universidade Federal de Santa Maria, 2008-06-30)
The induction generator has characteristics making it interesting for alternative sources of energy, such as low cost, ruggedness, low maintenance, high availability and good dynamic behavior. So, it is very much applied ...
Servocontrole de velocidade aplicado a motores de indução monofásicos sem sensores mecânicos
(Universidade Federal de Santa Maria, 2008-10-31)
This work proposes a sensorless speed control applied to single-phase induction motors
(SPIM). The objective is to present an alternative for variable speed single-phase motor
drives for residencial applications, which ...
Controle de velocidade sensorless de motores de indução trifásicos sujeitos a distúrbios de torque
(Universidade Federal de Santa Maria, 2008-10-31)
This work presents a study of a sensorless speed servomechanism using threephase
induction motors. The aim is to investigate the performance of a specific control
technique when different load variations or torque ...
Contribuição ao controle de máquinas de vibração eletrodinâmicas
(Universidade Federal de Santa Maria, 2009-03-20)
This work presents contributions to the sinusoidal acceleration control of electrodynamic shakers applied in vibration testing. Considering the importance of sine tests to identify critical frequencies of operation and to ...