Electromagnetic Induction
Mostrando 13-24 de 39 artigos, teses e dissertações.
-
13. Does the casting mode influence microstructure, fracture and properties of different metal ceramic alloys?
The aim of the present study was to evaluate the tensile strength, elongation, microhardness, microstructure and fracture pattern of various metal ceramic alloys cast under different casting conditions. Two Ni-Cr alloys, Co-Cr and Pd-Ag were used. The casting conditions were as follows: electromagnetic induction under argon atmosphere, vacuum, using blowtorc
Brazilian Oral Research. Publicado em: 2012-06
-
14. Desenvolvimento de sistema eletrônico para tomografia de indução magnética / Electronic system development for magnetic induction tomography
Magnetic induction tomography is a contactless conductivity imaging technique. This technique uses a magnetic field generator (usually a coil) to induce Eddy currents in the target object and several magnetic sensors (usually coils as well) that capture the magnetic field generated by these induced currents. The measurements obtained by these sensors can be
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011
-
15. 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
-
16. Simplified Mathematical Modeling for an Electromagnetic Forming System with Flat Spiral Coil as Actuator
This study presents mathematical modeling and calculation procedure for problems of electromagnetic forming of thin circular metal sheets using a flat spiral coil as actuator. The methodbased on the Biot-Savart Law focuses specifically on the calculation of the electromagnetic field generated by the flat coil and analysis of the circuit that models the elect
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
-
17. GPR and Electromagnetic Induction Methods Contributions in Studies of Coastal Sambaqui Archaeological Sites in Santa Catarina State. / Contribuições dos métodos GPR e Eletromagnético Indutivo em estudos de sítios arqueológicos de sambaquis costeiros no Estado de Santa Catarina
Nesta pesquisa são apresentadas as contribuições dos métodos GPR e eletromagnético indutivo (equipamento EM-38) nos estudos de sítios arqueológicos de sambaquis costeiros Jabuticabeira II, Santa Marta IV, V, VII e VIII, e Encantada III, localizados no município de Jaguaruna, litoral centro-sul de Santa Catarina. Estes sítios são caracterizados por
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2010
-
18. Comparative study of two commercially pure titanium casting methods
The interest in using titanium to fabricate removable partial denture (RPD) frameworks has increased, but there are few studies evaluating the effects of casting methods on clasp behavior. OBJECTIVE: This study compared the occurrence of porosities and the retentive force of commercially pure titanium (CP Ti) and cobalt-chromium (Co-Cr) removable partial den
Journal of Applied Oral Science. Publicado em: 2010-10
-
19. Dificultades de los estudiantes universitarios en el aprendizaje de la inducción electromagnética
The work presented deals with the ideas of first-year Engineering students and third year Physics students about the theory of electromagnetic induction (EI). In this investigation we analyse that part of the theory of EI relating to Faraday's law which comes within the basic analysis of induction phenomena for introductory physics courses within classical p
Revista Brasileira de Ensino de Física. Publicado em: 2010-03
-
20. Investigations on DNA damage and frequency of micronuclei in occupational exposure to electromagnetic fields (EMFs) emitted from video display terminals (VDTs)
The potential effect of electromagnetic fields (EMFs) emitted from video display terminals (VDTs) to elicit biological response is a major concern for the public. The software professionals are subjected to cumulative EMFs in their occupational environments. This study was undertaken to evaluate DNA damage and incidences of micronuclei in such professionals.
Genetics and Molecular Biology. Publicado em: 29/01/2010
-
21. Estampagem eletromagnética de chapas finas : viabilidade técnica / Electromagnetic forming of thin metal sheets: technical feasibility
Esta dissertação apresenta modelagem matemática e um método de solução numérica para problemas de conformação eletromagnética de chapas metálicas finas circulares utilizando uma bobina em espiral plana. O método foca especificamente o cálculo do campo eletromagnético gerado pela bobina e análise do circuito que modela o sistema de estampagem e
Publicado em: 2010
-
22. A historical study of the evolution of vector potential in classical electromagnetic theory / Um estudo histórico da evolução do conceito de potencial vetor no eletromagnetismo clássico
Currently the vector potential generally is considered in the classical electromagnetic theory as an artifice for the calculation of the electric and magnetic fields and without a clear physical meaning. However, when it was proposed in the mid-nineteenth century, it used to have a clear physical meaning and played a central role for Faraday, Maxwell and oth
Publicado em: 2009
-
23. Effect of induction heating on steel seamless tubes used in diesel enginers / Efeito do aquecimento por indução eletromagnetica de tubos sem costura utilizados em motores a diesel
This paper presents a study about the effect of cold upsetting and electromagnetic induction heating on microstructure and hardness characteristics of steel seamles pipe. This pipe studied is applied in fuel flow transport of high pressure fuel system. As fuel is transported the pipe sealing characteristic is critical on assembly interfaces of this pipe. Thi
Publicado em: 2009
-
24. Modeling of welding machines for electromagnetic induction in RF / Modelagem de maquinas de solda por indução eletromagnetica em RF
Este trabalho trata do estudo de máquinas industriais de solda por indução eletromagnética na faixa de Rádio Freqüência (RF), visando modelos robustos baseados em circuitos de parâmetros concentrados. Tipicamente as máquinas industriais para a aplicação em questão, apresentam três estágios; a fonte (geração de energia eletromagnética), blind
Publicado em: 2009