Browsing by Author "Rodríguez, J."
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- ItemAño Internacional de Aristóteles : recordando los aportes a la medicina y a la biología humana de este gran polímata(2016) Cortés M.; Rodríguez, J.; Rodríguez, M.; Del Río, J.; Vigil Portales, María del Pilar
- ItemEffect of sulfur dioxide and modified atmosphere packaging on blueberry postharvest quality(2016) Rodríguez, J.; Zoffoli, Juan Pablo
- ItemNew Methodology for Analysis and Diagnosis of Sympathetic Interaction of Inrush Currents in Power Transformers for Detecting Abnormal Operating Conditions(IEEE, 2007) Martin, J. S.; Pontt, J.; Rodríguez, J.; Dixon Rojas, JuanThis paper presents a methodology for fast detection and identification of abnormal conditions in electrical systems. Modeling and simulation of most common operations of the system are simulated to create a database containing several patterns of performance under different abnormal operation conditions. The methodology has been tested to identify abnormal operating condition caused by sympathetic interaction of inrush currents in power transformers. Experimental validation of this method was allowing good current pattern identification and a good performance of the methodology was reached.
- ItemRecomendaciones para el diagnóstico y tratamiento antimicrobiano de la neumonía bacteriana adquirida en la comunidad en pediatría(2019) Cofré, J.; Pavez, D.; Pérez Pérez, Regina Elizabeth; Rodríguez, J.
- ItemRecomendaciones para el diagnóstico y tratamiento antimicrobiano de la otitis media aguda en pediatría(2019) Rodríguez, J.; Pavez, D.; Pérez Pérez, Regina Elizabeth; Cofré, J.
- ItemTrapezoidal Current Mode for Bidirectional High Step Ratio Modular Multilevel dc-dc Converter(IEEE, 2019) Pineda Fornerod, Cristian Andres; Pereda Torres, Javier Eduardo; Neira Castillo, Sebastian Felipe; Bravo, P.; Rodríguez, J.; García, C.High voltage direct current (HVDC) transmission systems and low voltage direct current (LVDC) networks are becoming popular due to their advantages and present feasibility, mainly pushed by the advance in power electronics. However, one of the main drawbacks of dc networks is the lack of a dc-dc converter that performs as the ac transformer in terms of efficiency, reliability and high-step voltage ratio, specially in medium and high voltage. Modular multilevel converters are an attractive alternative because they can manage medium and high dc voltages with standard semiconductor devices, and they can achieve high efficiency with soft switching modulation, such as resonant, trapezoidal or triangular currents usually used in double active bridges (DAB). This paper proposes a novel generalized trapezoidal current mode applied to high step ratio Modular Multilevel dc-dc Converters. The proposed modulation increases the efficiency and achieves bidirectional control of the power, soft-switching and a natural balance of the voltage in the capacitors. The simulation results show the bidirectional operation and the capacitor voltage balance of the converter under different operating conditions with high efficiency (98.2%).
- ItemTrayectorias de la periurbanización en Morelia, México : segregación espacial desde un enfoque relacional(2020) Rodríguez, N.; Vieyra, A.; Méndez Lemus, Y.; Hidalgo, Rodrigo; Alvarado Peterson, Voltaire Christian; Rodríguez, J.