Motors Parameters
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Avaliação da performance de motor a combustão interna e suas emissões utilizando biogasolina do craqueamento térmico de gorduras residuais
With the growing demand for fossil fuel and the need to minimize greenhouse gases emissions, investigative studies have been developed to allow the implementation of technologies that produce alternative fuels, with special emphasis for those developed from esterification/transesterification and catalytic cracking processes. The quality of the resulting prod
Publicado em: 2008
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14. IDENTIFICAÇÃO AUTOMÁTICA DOS PARÂMETROS ELÉTRICOS DE MOTORES DE INDUÇÃO TRIFÁSICOS / AUTOMATIC IDENTIFICATION OF THE ELECTRICAL PARAMETERS OF THREE PHASE INDUCTION MOTORS
Neste trabalho é desenvolvido um algoritmo capaz de identificar todos os parâmetros elétricos de um motor de indução trifásico, com realização discreta no tempo, utilizando plataforma com base em um processador digital de sinais de pontofixo. Algumas técnicas existentes na literatura são analisadas para fins de comparação e validação do algorit
Publicado em: 2008
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15. Desenvolvimento de indicadores de eficiÃncia energÃtica para avaliaÃÃo de pivÃs centrais de irrigaÃÃo
The task of this work is to present the development of some indicators and to create a label and energy efficiency standards for central pivoting irrigation systems. Firstly were presented policies and programs related to the efficient use of electrical energy and the methodology for the evaluation of such systems. With the approach of efficiency, losses in
Publicado em: 2008
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16. Reologia de Biodiesel de origens diversas e das misturas Diesel/Biodiesel
Cost and depletion of petroleum derived fuels are increasing, thus alternative fuels are quite required. Biodiesel (B100), which is comprised of fatty acid methyl (or ethyl) esters (FAMEs/FAEEs) derived from vegetable oils, animal fats or waste oils mainly through transesterification, is an alternative source of energy. It is renewable, available locally, bi
Publicado em: 2008
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17. Voltage unbalace numerical evaluation and minimization:estimation by incremental sensitivity analysis and analytical solutions / Avaliação e minimização numérica do desequilíbrio de tensão : estimativa por análise de sensibilidade incremental e soluções analíticas
Voltage unbalance is one of the parameters analysed in power quality studies, representing the difference between the magnitudes of the voltages of a tri-phase electrical system, and the phase shift between these. It is desirable to have sinusoidal voltages with identical magnitudes and 120 electrical degrees phase shift between them, but in practice, there
Publicado em: 2007
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18. Identificação on-line de motores de indução através de modelo discreto para sinais senoidais
In this work are developed two on-line identification methods for three-phase induction motors based on discrete models obtained when we consider continuous systems excited by sinusoidal signals. The first method uses the discrete model of the homopolar machine in the stationary frame to estimate the stator resistance and the stator dispersion inductance and
Publicado em: 2006
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19. Proposição de uma metodologia para avaliação de inversores de freqüência em estações elevatórias de água: estudo de casos no sistema de abastecimento de água de São José dos Campos. / Proposal of methodology to evaluation of variable frequency drives in water pumping stations: case study in water supply system in the city of São José dos Campos.
The main purpose of this work is to evaluate the application of Variable Frequency Drives ? VFD, carried out in water pumping stations managed by SABESP ? Companhia de Saneamento Básico do Estado de São Paulo, located in the city of Sâo José dos Campos that are monitored by the Operational Control Center ? O.C.C. Technical characteristics of four pumping
Publicado em: 2006
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20. ANÁLISE COMPARATIVA DE INVERSORES MULTINÍVEIS COM CÉLULAS H-BRIDGE CONECTADAS EM SÉRIE / COMPARISON ANALYSIS OF CASCADED MULTILEVEL INVERTERS
This Master Thesis presents a methodology to compare different topologies and configurations of multilevel systems applied to drive medium voltage induction motors. Initially, it presents the input and output parameters that must be supplied by the power drivesystems manufacturer. Then, the mathematical models of the performance indexes used are presented, b
Publicado em: 2006
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21. Desenvolvimento de um atuador de posição baseado em liga de memória de forma com resfriamento forçado. / Development of a position actuator based on a shape memory alloy with forced cooling.
Shape Memory Alloys (SMA) consist of a group of metallic materials that demonstrate the ability to return to some previously defined shape when subjected to the appropriate thermal cycle, due to shift in the materials crystalline structure. The change that occurs within SMAs crystalline structure is not a thermodynamically reversible process and results in h
Publicado em: 2006
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22. Metodologia para projeto, construção e ensaios em máquina síncrona de imã permanente - MSIP / Methodology for design, construction and testing on permanent magnet synchronous machine - PMSM
A grande aplicação residencial de motores de indução monofásicos é em sistemas de refrigeração doméstica/comercial. O desenvolvimento de motores mais eficientes, associado ao controle de velocidade, fez com que, dentro os mais diversos tipos de motores, o motor síncrono de imã permanente tornasse objeto para a criação de uma metodologia de proje
Publicado em: 2006
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23. Avaliação da influência dos parâmetros do processo de fundição sob pressão sobre qualidade de uma peça injetada em liga de alumínio
This paper describes the results obtained in a study performed in partnership between LabFund/DEM/PGCEM/UDESC and the Departments of Industrial Engineering, of Control of the Quality and of Aluminum Die Casting of WEG Motors involving the combination of an experimental methodology DOE (Design of Experiments) and a commercial numeric applicative to investigat
Publicado em: 2005
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24. Teoria de sistemas vibratorios aporticados não-lineares e não-ideais
This work concerns the computational and analytical study of the non-linear dynamic behavior of a portal frame, excited by a non-ideal source - an unbalanced direct current electric motor of limited power. A problem whose mathematical model represents a simplified system (the characteristic of the motor in stationary state) and complete (the electric equatio
Publicado em: 2002