En este trabajo se presenta de forma tutorial los conceptos básicos de modelado y control de convertidores conmutados continua-continua. Tras definir la Electrónica de Potencia y su dominio de utilización, se presenta la conversión continua-continua (cc-cc) como núcleo básico de aquella y se clasifican los convertidores conmutados cc-cc como sistemas de estructura variable. Se introduce posteriormente la noción de regulador conmutado y se describe el funcionamiento de un modulador de anchura de pulsos para derivar un modelo de tiempo continuo a partir de un análisis de la dinámica promediada del convertidor. A partir del modelo de tiempo continuo del convertidor, se obtiene el modelo dinámico del regulador conmutado y se describen controladores lineales de un solo lazo y controladores en cascada. El control no lineal de convertidores se aborda a partir de la inducción de regímenes deslizantes en las estructuras de potencia. Se establece a continuación la equivalencia de estos sistemas con los que utilizan modulador de anchura de pulsos, y se describen algunas de sus aplicaciones. Finalmente se ofrece una perspectiva de las técnicas de estudio de la dinámica no lineal en convertidores mediante un enfoque generalizado a partir de un modelo de tiempo discreto que permite analizar las bifurcaciones resultantes y controlar el caos.
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Vol. 6. Núm. 4.
Páginas 5-20 (octubre 2009)
Vol. 6. Núm. 4.
Páginas 5-20 (octubre 2009)
Open Access
Modelado y Control de Convertidores Conmutados Continua-Continua: Una perspectiva Tutorial
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L. Martinez Salamero, A. Cid-Pastor, A. El Aroudi, R. Giral, J. Calvente
Departamento de Ingenieria Electrónica, Eléctrica y Automática, Escuela Técnica Superior de Ingenieria, Universidad Rovira i Virgili, Campus Sescelades, Països Catalans 26, 43007 Tarragona, España
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Resumen
Palabras clave:
Convertidores conmutados
sistemas de estructura variable
sistemas no lineales
modulación de anchura de pulsos
control no lineal
control en modo de deslizamiento
sistemas de control lineal
control H-infinito
comportamiento caótico
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