Frequency Inverter
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Implementação de sistemas inteligentes em processadores digitais para controle de máquinas elétricas rotativas / Implementation of intelligent system in digital processor for rotative electric machine control
The objective of this work consists of the implementation of intelligent system architecture in Digital Signal Processor (DSP) aiming at the real-time three-phase induction motor control. Therefore, a fuzzy logic speed control drive system for three-phase induction motor is proposed, whereas the control methodology is based on voltage and frequency (Volts/He
Publicado em: 2008
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14. Controle e avaliação de um conjunto gaseificador-combustor de fluxo concorrente, utilizando como combustível a biomassa de lenha de eucalipto / Control and evaluation of a set gasifier-combustor with co-current flow using eucalyptus wood as a fuel
Recently, concern has grown considering environmental issues associated with the preservation of natural resources with the intention of improving the present and future quality of life. Biomass gasification shows to be a sustainable technology for power generation with low greenhouse gas emissions. One of the problems by using the gasifier for air heating p
Publicado em: 2008
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15. 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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16. Projeto de um inversor trifásico com snubber de undeland regenerativo e controle digital implementado no DSP TMS320F2812
This work deals with the design and implementation of the digital instantaneous averaged values control for output voltages of the three-phase inverter with Underlands snubber, using the Buck-Boost converter for regeneration of the snubbers energy. The qualitative and quantitative analysis of the inverter power structure, snubber and auxiliary converter, as
Publicado em: 2007
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17. ANÁLISE COMPARATIVA DE INVERSORES MULTINÍVEIS COM CÉLULAS H-BRIDGE CONECTADAS EM SÉRIE / COMPARISON ANALYSIS OF CASCADED MULTILEVEL INVERTERS
This Master Thesis presents a methodology to compare different topologies and configurations of multilevel systems applied to drive medium voltage induction motors. Initially, it presents the input and output parameters that must be supplied by the power drivesystems manufacturer. Then, the mathematical models of the performance indexes used are presented, b
Publicado em: 2006
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18. Desenvolvimento de conversor comutado em baixa frequencia para aplicação em sistemas de geração distribuida baseados em celulas a combustivel / Development of a low-frequency commutation converter for distributed generation system based on fuel cells
The connection of distributed power sources with the utility grid generally needs an electronic power converter for processing the locally generated power and injecting current into the system. This work presents a system intended to low-power distributed generation composed by a DC primary source, as a fuel cell. A boost converter connects the supply to an
Publicado em: 2006
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19. Controle e monitoramento em tempo real do regime de jorro estavel atraves da analise espectral / Control and monitoring on line of the steady regime in the spouted bed process by spectral analysis
This work describes the control and on line monitoring of the spouted bed steady regime using the gas-solid contact regimes identification method by pressure measurements. The work presents two main features: 1) the on line identification of fluid dynamic regimes in the spouted bed process based in the spectral analysis of the pressure fluctuations and 2) th
Publicado em: 2006
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20. Uma proposta de controle de paralelismo de inversores com a rede elétrica utilizando-se a técnica de realimentação de fase
Este trabalho apresenta um controlador de fluxos de potência ativa e reativa aplicado ao paralelismo de um inversor com a rede elétrica. Uma malha adicional de controle é inserida a um controlador convencional, o qual é baseado nas curvas características de potência ativa versus freqüência e potência reativa versus tensão. Essa malha utiliza a real
Publicado em: 2006
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21. Uma proposta de controle de paralelismo de inversores com a rede elÃtrica utilizando-se a tÃcnica de realimentaÃÃo de fase
Este trabalho apresenta um controlador de fluxos de potÃncia ativa e reativa aplicado ao paralelismo de um inversor com a rede elÃtrica. Uma malha adicional de controle à inserida a um controlador convencional, o qual à baseado nas curvas caracterÃsticas de potÃncia ativa versus freqÃÃncia e potÃncia reativa versus tensÃo. Essa malha utiliza a real
Publicado em: 2006
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22. AplicaÃÃo do controle de um processo demoagem em moinho de bolas atravÃs do sistema LabVIEW-Compact FIeldpoint-Inversor de freqÃÃncia
This work had the objective of study the speed control of the process of ball-milling through the use of a controlled frequency inverter (drive) connected to the Compact Fieldpoint hardware and the LabVIEW software, with the interest in carrying through the control of the milling process to reach an optimized condition of operation. For this, a control syste
Publicado em: 2005
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23. Analysis, design and implementation of inverter topologies using the McMurray topology / Análise, projeto e concepção de estruturas inversoras utilizando a topologia McMurray
This work fulfills the study of a single-phase full bridge converter, including operating principles and relevant expressions for the design of a prototype. In order to obtain nearly sinusoidal output voltage with reduced total harmonic distortion, a modified modulation technique is applied to the converter. Three possible configurations operating at high fr
Publicado em: 2005
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24. AnÃlise, projeto e concepÃÃo de estruturas inversoras utilizando a topologia McMurray / Analysis, design and implementation of inverter topologies using the McMurray topology
This work fulfills the study of a single-phase full bridge converter, including operating principles and relevant expressions for the design of a prototype. In order to obtain nearly sinusoidal output voltage with reduced total harmonic distortion, a modified modulation technique is applied to the converter. Three possible configurations operating at high fr
Publicado em: 2005