Electrical Motors
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. Evaluation of the impact of induction motors in electrical distribution networks and a regulation proposal to their access to low voltage networks. / Águas minerais em São Paulo.
This work as aim to draw a brief panorama of Drinking Waters that are explored in the state of São Paulo. Through this work will be studied the importance of the exploration of Drinking Waters for the São Paulo state and for the whole country. Several changes occurred in the Market of Mineral Water that in 1980 it was practically unknown. This dissertation
Publicado em: 2009
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14. Metodologia para conversão de veículos equipados com motores a combustão interna para tração elétrica: aplicação de motor síncrono de ímã permanente com fluxo magnético radial a um furgão, Brasil. 2009. / Methodology to convert internal combustion engines vehicles to operate with electrical power: a radial magnets permanent flux magnet synchronous motor is custom-made to a Van, Brazil. 2009
Climate changes, atmospherics characteristics and environmental pollution have turned the final use of energy an issue of special interest to be addressed by studies all over the world. The mix of energy, characterized by the Brazilian energy sources, makes it possible to consider the development and better understanding of this technology in order to reduce
Publicado em: 2009
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15. Avaliação do impacto de motores de indução trifásicos em redes de distribuição de energia elétrica e uma proposta de regulamentação para seu acesso às redes de baixa tensão. / Evaluation of the impact of induction motors in electrical distribution networks and a regulation proposal to their access to low voltage networks.
Este trabalho tem por objetivo apresentar e discutir alguns modelos desenvolvidos para a avaliação do impacto de motores de indução trifásicos nas redes de distribuição de energia elétrica partindo de seus dados de placa e utilizando algoritmos evolutivos para o cálculo dos parâmetros elétricos do circuito equivalente do motor. A discussão é de
Publicado em: 2009
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16. SERVOCONTROLE DE VELOCIDADE APLICADO A MOTORES DE INDUÇÃO MONOFÁSICOS SEM SENSORES MECÂNICOS / SERVO CONTROL OF SPEED APPLIED TO SINGLE-PHASE INDUCTION MOTORS WITHOUT SPEED SENSOR
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 operate mostly with constant speed. For contextualization in the actual scenario, firstly a bibliographic review about variable speed operati
Publicado em: 2008
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17. AUTOMATIC PROJECT OF ENCODERLESS SPEED REGULATORS APPLIED TO THREE-PHASE INDUCTION MOTORS / PROJETO AUTOMÁTICO DE CONTROLADOR DE VELOCIDADE SEM SENSOR MECÂNICO PARA MOTORES DE INDUÇÃO TRIFÁSICOS
This works proposes parameters estimation algorithm to auto-tune the control laws of a speed sensorless servo. The identification process of the electrical and mechanical parameters is based on recursive least squares method (RLS) and utilizes just measured stator currents. The electrical parameters are obtained by the transfer function of the motor with loc
Publicado em: 2008
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18. 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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19. Eletroerosão por fio em metal duro para ferramentas de estampagem de lâminas de motores elétricos
The process of wire electrical discharge machining is currently used in manufacturing most hard metal (tungsten carbide) dies and punches, used in steel stamping tools for electric motors. The home appliance, industrial electric motor, transformer and hermetic compressor industries, use progressive stamping tools, justifying a better understanding of the man
Publicado em: 2008
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20. 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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21. Monitoramento permanente de motores de indução trifasicos / On-line monitoring of three-phase induction motors
A predictive maintenance program must include several techniques of monitoring of the electric motors conditions. Among these techniques, probably the two most classic ones are related to electric current and vibration analysis. Unfortunately, in both cases inherent drawbacks make difficult their use in loco on industry plants. As there is a large range of
Publicado em: 2007
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22. 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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23. Modelling and analysis of conventional and intelligent air conditioner types and influence on dynamical behaviour of electrical utility grids / Modelagem e análise de condicionadores de ar dos tipos convencional e inteligente e influência no comportamento dinâmico das redes elétricas
Due to crescent demand and diversity of consumption equipments, the electrical power systems have presently shown operation problems, as in steady state to keep the voltage level within an appropriate range, as well as in transient state when facing disturbances such as short-circuit, generation loss, etc. For studying the effects of such disturbances in the
Publicado em: 2007
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24. Tração eletrica como alternativa energetica : uma proposta para a conversão de veiculos automotivos de uso urbano / Electrical traction as an energetic alternative: a proposal for the conversion of urban automotive vehicles
The objective of the dissertation is to present a low cost system for the utilization of electric propulsion in urban vehicles powered with internal combustion engines, ft will be discussed semiconductor devices parallelism techniques for high demands of power, electric engines, batteries, and re-charge- systems. In a general way. the project has as objectiv
Publicado em: 2006