Control Of Electrical Motors
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Projeto e construção de um motor elétrico linear aplicado à bioengenharia / Design and construction of a linear electric motor applied to bioengineering
Considerando-se o atual estagio de desenvolvimento das máquinas elétricas, tanto em termos de ferramentas computacionais auxiliares nas simulações e nos projetos, quanto de materiais e sistemas eletrônicos de acionamento e controle, propõe neste trabalho a construção de um dispositivo eletromecânico, na classe dos motores elétricos lineares, que at
Publicado em: 2011
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2. Algoritmo para frenagem regenerativa de uma máquina síncrona de imã permanente / Algorithm for regenerative braking of a permanent magnet synchronous machine
Environmental protection and optimal energy resources are great activity research areas. As a result of these researches, electric vehicles (EVs) and hybrid (HEV) developments have been accelerated. They have challenging problems such as low autonomy, power conversion, vehicle control, energy management and distribution within it, as well as the esthetic and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2010
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3. Avaliação da influência dos parâmetros do processo de soldagem TIG sobre a qualidade de uma peça fabricada em aço elétrico silicioso / Influence of TIG welding process parameters on the quality of a piece fabricated with silicon electrical steel
The TIG welding process (Tungsten Inert Gas), also known as GTAW (Gas Tungsten ArcWelding), is the most commonly used process for welding of thin plates where there is a need for an excellent control of the temperature applied on the piece. This paper presents a study carried out in partnership between the Department of Graduate Studies in Scienceand Materia
Publicado em: 2010
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4. Projeto de filtros para atenuação de correntes de modo comum e de sobretensões em acionamentos de motores elétricos utilizando inversores PWM
The use of inverters in most of electrical motor drives applications has been accompanie by several undesirable effects, such as overvoltage at the motor terminals, circulation of common mode currents and electromagnetic interference problems. The determining factors for most of these problems come with the high switching speed and frequency of the semicondu
Publicado em: 2010
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5. IDENTIFICATION OF THE BEHAVIOR OF TEMPERATURE MAIN RECTIFIER OF A DIESEL-ELECTRIC LOCOMOTIVE / IDENTIFICAÇÃO DO COMPORTAMENTO DA TEMPERATURA DO RETIFICADOR PRINCIPAL DE UMA LOCOMOTIVA DIESEL-ELÉTRICA
In this dissertation, we explore the application of the Theory of System Identification to develop a mathematical model that represents the behavior of the electrical current rectifier used to power the traction motors of a locomotive diesel-electric, based on mathematical manipulation of its temperature data. It was developed an ARX model and, using the aid
Publicado em: 2010
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6. 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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7. 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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8. 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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9. 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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10. 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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11. 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
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12. The effect of the carbon content on the grain size coarsening and on the magnetic properties of the semi processed electrical steels after the final annealing. / O efeito do carbono no aumento do tamanho de grão e nas propriedades magnéticas de aços elétricos semiprocessados após o recozimento final.
Annealing applied by the motors plants that are made on the semi processed electrical steels without an exact and precisious control of the decarburization on the lamination can brings undesirable results on the grain size coarsening and as a result an increasing on the core losses with a significant depreciation on the efficiency of the electrical motors. M
Publicado em: 2006