High Frequency Transformer
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. A systematic sensitivity analysis of the performance of a transcutaneous energy transmitter for design purposes
This work studies a Transcutaneous Energy Transmitter (TET) which uses electromagnetic fields to transfer power from outside the body to an artificial organ in the body, working like a high frequency transformer with the skin being part of the magnetic coupling between the primary (external coil) and secondary (internal coil). For this reason, this project m
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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2. Micromachined microwave planar spiral inductors and transformers
A new micromachined planar spiral inductor, with the strips suspended individually, has been fabricated in standard GaAs high electron-mobility transistor monolithic-microwave integrated-circuit technology through maskless front-side bulk micromachining. The electronic compatibility, the use of industrial integrated-circuit production lines, the straightforw
Publicado em: 2011
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3. Conversor CC/CA de alta freqüência baseado em inversores ressonantes com comutação seqüencial para excitação de uma tocha indutiva a plasma térmico
This work describes the study, the analysis, the project methodology and the constructive details of a high frequency DC/AC resonant series converter using sequential commutation techniques for the excitation of an inductive coupled thermal plasma torch. The aim of this thesis is to show the new modulation technique potentialities and to present a technologi
Publicado em: 2010
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4. Single-line-to-earth fault limitation through the setting of Petersen coil in power transformer neutral / Limitação de correntes de falta fase-terra por meio do ajuste de bobina de petersen em neutro de transformadores de potência
The Petersen coil insertion on the neutral of the electrical distribution power system transformers has been a technical strategy adopted for several electrical utilities, in many countries with the purpose to reduce the earth-fault current intensities, enabling circuit disconnect decrease for intermittent faults and so to improve the electrical power qualit
Publicado em: 2009
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5. MODELING, DESIGN AND IMPLEMENTATION OF AN INSULATED POWER FACTOR CORRECTED SINGLE-STAGE CONVERTER / MODELAGEM, PROJETO E IMPLEMENTAÇÃO DE UM CONVERSOR ISOLADO COM UM ÚNICO ESTÁGIO E CORREÇÃO DO FATOR DE POTÊNCIA.
Esta Dissertação de Mestrado apresenta uma nova análise, modelagem e metodologia de projeto de um conversor CA-CC isolado com um único estágio e correção do fator de potência. Inicialmente, é apresentado o princípio de operação do conversor em estudo propiciando um melhor entendimento do funcionamento do mesmo. Assim, baseada na nova análise, s�
Publicado em: 2008
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6. Análise e Síntese de um Algoritmo Phase-Locked-Loop Robusto para Estimação de Amplitude, Fase e Freqüência de Sinais Elétricos
The always more restrictive energy quality benchmarks, pushed on by consumers, associated with the electric sector deregulamentation has been imposing the necessity, for the concessionaries, of a better and decentralized monitoring of energy electric quality. At the same time, the increase of nonlinear loads connected to the electric network, among other fac
Publicado em: 2007
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7. Design, development and implementation of a solid-state pulse modulator for high-power pulse transmitters / Projeto, desenvolvimento e construção de um modulador de pulso estado-solido para transmissores pulsados de alta potencia
This work describes the development of a modular line-type solid-state pulse modulator topology to be applied in magnetron pulsed power radar transmitters, commonly found on tracking, weather and air traffic management radars. This research includes the design, development and assembling of a pulsed modulator for the Barreira do Inferno Launching Center (CLB
Publicado em: 2005
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8. Estudo e implementação de estrategia para minimização de sobretensões produzidas por inversores PWM em sistemas de acionamento de motores eletricos com cabos longos
The analysis of long distance induction motor driving systems is performed. This kind of system, usuaIly driven by a voltage source inverter, has been employed by Petrobras for oi! exploitation in deepwater. Due to the excessive cable length, undesirable effects such as overvoltages and overcurrents are recorded at the motor and the inverter, respectively. P
Publicado em: 2001
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9. Locomotivas de C.A : uma analise harmonica da corrente
AC thyristor controlled electric traction became very usual around the world. Thyristors provide good control performance but they always cause problems to the traction electric system. Overvoltages may arise in the contact line feeding the locomotive and also harmonics generated in the thyristors may affected the grid to which the whole system is connected.
Publicado em: 1993