Buscar
Itens para a visualização no momento 1-10 of 441
Controle adaptativo robusto por modelo de referência aplicado ao controle de velocidade e de posição de motores síncronos a ímãs permanentes
(Universidade Federal de Santa Maria, 2011-08-26)
This work proposes two vector control schemes for permanent magnet synchronous
motors. They are destined to speed and position control, respectively, and are based on a
control law called VS-RMRAC. Not being yet applied ...
Avaliação da qualidade de energia e performance de potência de turbinas eólicas conectadas à rede elétrica
(Universidade Federal de Santa Maria, 2010-02-22)
This master thesis describes a system capable of real-time characterization of power performance and power quality of wind turbines, based mainly on the IEC 61400-21 and IEC 61400-12-1 standards. To verify the performance ...
Estudo, controle e implementação do conversor Boost PFC operando no modo de condução mista
(Universidade Federal de Santa Maria, 2009-11-10)
This Master Thesis presents the study and proposes a digital control system applied to the PFC boost converter operating in mixed conduction mode. The motivation to this subject, a bibliographic review of the existing ...
Aspectos técnicos e operacionais do uso de microturbinas conectadas aos sistmas elétricos para geração distribuída de energia
(Universidade Federal de Santa Maria, 2010-06-16)
The considerable increase in energy demand has increased the interest in reducing costs, improving reliability, quality and stability of power generation systems. The connection of distributed generation (DG) can be used ...
Desenvolvimento de metodologia do projeto do reator eletrônico auto-oscilante com entrada universal
(Universidade Federal de Santa Maria, 2010-01-14)
This work presents the design and analysis of an electronic system with universal input to supply a fluorescent lamp. The system includes a self-oscillating electronic ballast and an additional circuit which allows keeping ...
Desenvolvimento de uma fonte de potência CA para geração de formas de onda de até 2kHz
(Universidade Federal de Santa Maria, 2010-07-30)
This work presents the development of an alternating current power source with a single-phase full bridge voltage inverter, based on electronic switches. The source is designed to drive electromechanical and electric plants. ...
Projeto e implementação de lâmpadas para iluminação de interiores empregando diodos emissores de luz(LEDS)
(Universidade Federal de Santa Maria, 2008-10-31)
This work presents an efficient lighting system using high intensity light emitting
diodes (LEDs). The goal is to develop a compact and low cost electronic circuit to drive and
control the current of LEDs disposed in a ...
Tranformada wavelet e redes neurais artificiais na análise de sinais relacionados à qualidade da energia elétrica
(Universidade Federal de Santa Maria, 2009-02-10)
This work presents a different method for power quality signal classification using the principal components analysis (PCA) associated to the wavelet transform (WT). The standard deviation of the detail coefficients and ...
Integração de pilhas de células a combustível com outras fontes alternativas de energia
(Universidade Federal de Santa Maria, 2009-03-31)
This dissertation presents a project of a integrated system with distinct energy generating modules using a wind generator, photovoltaic generator, fuel cells stack
(FCs) and an accumulator of energy formed by a bank of ...
Contribuição ao estudo de estratégias de modulação aplicadas a conversores multiníveis com diodos de grampeamento
(Universidade Federal de Santa Maria, 2009-04-30)
This dissertation deals with modulation techniques for multilevel diode clamped converters.
The major challenge to be overcome by modulation strategies to these converters
is the balance of the dc-link voltage capacitors, ...