Frequency Converter
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. ELECTRICAL NOISES REDUCTION IN NANOPORES EXPERIMENTS BASED ON CONSENSUS FILTER
Nanopore has developed into an indispensable tool for single molecules experiments, where useful information about the characteristics of DNA/RNA can be obtained from the flowing of ionic current elicited by individual molecules as they traverse a single nanometer-scale aperture. However, due to the relatively high background current noise and low measuremen
Quím. Nova. Publicado em: 20/07/2020
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2. Green Energy Generation Using FLC Based WECS With Lithium Ion Polymer Batteries
ABSTRACT Green Energy Generation Using Wind energy conversion system is achieved using Lithium Ion Polymer Batteries and Fuzzy logic controller. Presented scheme also provides the constant output power for the stand alone loads like Island, Hills Stations, Ships and Remote locations etc. A fuzzy-logic controller based Wind energy conversion system with perma
Braz. arch. biol. technol.. Publicado em: 23/01/2017
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3. Uncertainty analysis of the conducted interferences in a power converter
A new methodology to analyze electrical systems in the time and frequency domain containing a large number of uncertain parameters is presented. The methodology is based on screening and design of experiments to build surrogate reduced models at a well specified set of frequency values. As an example, the conducted interferences of a Power Converter with unc
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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4. MODELAGEM E CONTROLE DE UM REATOR ELETRÔNICO PARA LÂMPADAS HPS BASEADO NA CONEXÃO DIFERENCIAL DE CONVERSORES CC / MODELING AND CONTROL OF AN ELECTRONIC BALLAST FOR HPS LAMPS BASED ON DIFFERENTIAL CONNECTION OF DC CONVERTERS
This paper presents the development of an electronic ballast for high intensity discharge lamps, using the differential connection technique applied to Flyback converters. The power factor correction stage was implemented by a Buck-Boost converter operating in discontinuous conduction mode. Subsequently, the integrating converters technique was used to simpl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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5. Estudo clínico e eletromiográfico de músculos cervicais em mulheres com e sem disfunção temporomandibular / Clinical and electromyographic study of cervical muscles in women with and without temporomandibular dysfunction
The temporomandibular disorder (TMD) among many symptoms causes orofacial pain. It is also common, the incidence of neck pain complaint, which leads to overlapping signs and symptoms of temporomandibular joint (TMJ) and cervical spine. This study aimed to compare the patterns of electromyographic activity and the presence and severity of pain in the cervical
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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6. CONTROLE NÃO LINEAR DE UM PRÃ-REGULADOR ISOLADO COM PFC E ACOPLAMENTO AUXILIAR / âNonlinear control of a high frequency isolated pre-regulator with PFC and auxiliary coupling
Este trabalho propÃe o estudo de uma nova topologia, com dois estÃgios, de um conversor estÃtico, onde existe um fluxo de potÃncia auxiliar com o objetivo de aumentar o rendimento do sistema. O primeiro estÃgio à um conversor CA-CC com correÃÃo do fator de potÃncia (PFC) e o segundo estÃgio à um conversor CC-CC isolado em alta frequÃncia. Os dois
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/08/2011
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7. Control strategies applied for reducing the vibration and torque ripple of a special Switched Reluctance Motor
Despite its robustness the Switched Reluctance Motors (SRMs) present some inconvenient drawbacks as a major torque ripple, vibration and acoustic noise when compared to other types of motors. These characteristics are usually related to factors such as the salient poles in the stator and in the rotor, the switched feeding and the control strategy imposed by
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2011-06
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8. Uma plataforma para aferição remota de temperatura de bovinos da raça Brangus / A plataform for identication and measurements of remote temperature of bovine of the Brangus race
A pecuaria de precisão e uma ferramenta cada vez mais utilizada para auxiliar no correto tratamento dos produtos, na busca de alimentos cada vez mais saudaveis, no controle adequado do negocio, visando ao crescimento da produtividade e no atendimento das demandas para conquista de novos mercados, tanto interno como externo. A pecuaria de precisão introduz
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2010
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9. CONSERVAÇÃO DE ENERGIA NO BRASIL: APLICAÇÃO DE INVERSORES DE FREQUÊNCIA PARA FOMENTAR A EFICIENTIZAÇÃO DO USO DA ENERGIA ELÉTRICA NA INDÚSTRIA / ENERGY CONSERVATION IN BRAZIL: APPLICATION FREQUENCY INVERTERS FOR PROMOTING Efficiency USE OF ELECTRICITY IN INDUSTRY
Este trabalho tem como objetivo apresentar uma visão da conservação de energia no Brasil, com foco na eficientização elétrica da indústria, discutindo a viabilidade de projetos industriais para unidades novas e existentes, onde o emprego de inversores de freqüência pode trazer ganhos substanciais de economia de energia (energy savings). Muitos deste
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/10/2010
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10. Conversor matricial indireto para acionamento de motor de indução trifásico
Matrix converter topologies, despite the technological challenges it still presents, offers interesting possibilities concerning volume, weight, operating temperature grade, life time and input power factor. In order to create sufficient design resources to build a working prototype, initially a brief theoretical research was conducted in direct and indirect
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2010
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11. APPICATION OF FUZZY LOGIC IN CONTROL THE CRYSTALLIZATION OF AN ABSORPTION REFRIGERATION SYSTEM WITH PAIR WATER LITHIUM BROMIDE / Aplicação da lógica fuzzy no controle da cristalização de um sistema de refrigeração por absorção com par brometo de lítio
This work presents theoretical and experimental study of a system of control for a steam generator. This system was developed to control the crystallization of a cooling system for absorption. The control system maintains the pressure generator above the zone of crystallization of diagram temperature pressure-saturated solution concentration of LiBr-water. T
Publicado em: 2010
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12. 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