High Efficiency Motor
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. TECHNICAL AND ECONOMIC FEASIBILITY OF USING A VARIABLE-FREQUENCY DRIVE IN MICRO-IRRIGATION SYSTEMS
ABSTRACT Irrigation is essential for the development of crops in regions with scarcity or irregular rainfall distribution, enabling high productivity. However, the use of water resources and electrical energy leads to a concern with irrigation efficiency. Pressure demand varies during the operations of irrigation systems and the appropriate pressure can be r
Eng. Agríc.. Publicado em: 2021-02
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2. Estratégia para estimação do conjugado eletromagnético de motores de indução / STRATEGY FOR THE ESTIMATION OF TORQUE ELECTROMAGNETIC INDUCTION MOTORS
The purpose of this work is to develop a strategy for determining the electromagnetic torque of induction motors (MIT) from the stator flux estimation, which presents higher robustness against parametric variations. The stator flux is estimated by integrating the voltage model of the machine, applying Highpass Filters (HFP) for ideal integration of electromo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/05/2011
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3. Comportamento elétrico, mecânico e hidráulico de um sistema de bombeamento sob o enfoque da qualidade de energia elétrica e eficiência energética
The objective of this thesis is to present a methodology of comparison of the electric, mechanical and hydraulical performance of a pump system, under the point of view of the energy efficiency, when supplied with signals power quality. The form used for this intention was to the variation of controlled outflow for strangulation of valve or variation of freq
Publicado em: 2010
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4. Simultaneous control and piezoelectric insert optimization for manipulators with flexible link
This work proposes a tracking control model for a flexible link robotic manipulator using simultaneously motor torques and piezoelectric actuators. The dynamic model of manipulator is obtained in a closed form through the Lagrangian approach. The control uses the motor torques for the tracking control of the joints and also to reduce the low frequency vibrat
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-06
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5. Motor performance, academic performance, and sense of self-efficiency among elementary school students / Desempenho motor, desempenho acadêmico e senso de auto-eficácia de escolares do ensino fundamental
The objective of this study was to investigate motor performance, academic performance, and the sense of self-efficiency among elementary school students in a public school in São José, Santa Catarina, Brazil. The sample consisted of 406 children enrolled in the 2nd to 4th grades, aged 7 to 10 years (8.75 years; 1.00), with 231 girls (8.74 years; 1.02) and
Publicado em: 2009
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6. Simulation strategies for analysis of energy efficiency in a pumping system monitored by supervisory control / Estratégias de simulação para análise da eficiência energética em sistema de bombeamento monitorado via supervisório
Devido à baixa eficiência dos sistemas de bombeamento existentes no setor industrial (onde são responsáveis por aproximadamente 18% da força motriz utilizada) este trabalho tem o objetivo de elaborar estratégias de ensaios em uma bancada de simulação para verificação dos potenciais de eficiência energética nestes sistemas. O estudo foi realizado
Publicado em: 2008
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7. Acionamento vetorial de motores de indução trifásicos com enfraque-cimento de campo e maximização do conjugado por ampère
This work investigates the operation of three phase induction motors in field weakening and high speed regions. Maximum torque per ampère is imposed by using an indirect vector control strategy. Mathematical models that accounts for magnetic saturation is used for simulations and adjustment of controllers used in control algorithm. The driving structure is
Publicado em: 2008
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8. LINEAR ULTRASONIC MOTOR WITH TUBULAR GEOMETRY / MOTOR ULTRA-SÔNICO LINEAR COM GEOMETRIA TUBULAR
This work presents the study on a linear ultrasonic motor with tubular geometry for linear displacements. Similar topologies, reported elsewhere, are conceived for producing rotary motions. Due to some particular characteristics of this geometry, not explored yet, a new study on interaction between resonance modes in a hollow cylinder for linear movement gen
Publicado em: 2008
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9. Ciclimo de velocidade : uma proposta de controle da preparação fisica especial / Short track races : a proposal control of the special physical preparation
The cyc1ing is an Olympic sport composed by events with different motor capacities, demanding a particular and deepened study of each one. In the last years the race bicycles had passed for great technological evolution, making of the light and resistant materials, important for the increase of the sporting performance, however only the easiness of access to
Publicado em: 2008
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10. Action of conservation of energy applied to one plants composed industrial of induction motors / Ações de conservação de energia aplicadas a uma planta industrial composta de motores de indução
The objective of the present research, from a data set of electric motor collected in a regimen of work, give its contribution to the study on industrial electrical motors energy saving. It present the three-phase induction motor, the various issues of its industrial use and the electric parameter set collected are then presented. Field of work was elabora
Publicado em: 2006
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11. Uma contribuição para a aplicação de motores de indução lineares em secadores de cereais
The purpose of this thesis is the acting study and efficiency of the linear induction motor, applied as driver of the discharge dam in dryers of cereals, in substitution to the Conventional System used previously, composed by a system electric pneumatic, group compressor, pneumatic piston and accessories. The search of this purpose based on the looking for o
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