Rosas-Caro, Julio
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Preferred name
Rosas-Caro, Julio
Official Name
Rosas Caro, Julio César
Alternative Name
crosas
Main Affiliation
ORCID
Scopus Author ID
57191227591
Researcher ID
R-6224-2018

Research Output
Now showing 1 - 10 of 118
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A Single-Output-Filter Double Dual Ćuk Converter

2024 , Robles-Campos, Héctor R. , Rosas-Caro, Julio , Valderrabano-Gonzalez, Antonio , Johnny Posada

This study introduces an innovative version of a recently studied converter. A Double Dual Ćuk Converter was recently studied with advantages like the possibility of designing it for achieving a low-input current ripple. The proposed converter, called the Improved Double Dual Ćuk Converter, maintains the advantages of the former one, and it is characterized by requiring one less capacitor and inductor than its predecessor. This allows addressing the challenge of optimizing the topology to reduce component count without compromising the operation; this work proposes an efficient design methodology based on theoretical analysis and experimental validation. Results demonstrate that the improved topology not only retains the advantages of the previous version, including high efficiency and robustness, but also enhances power density by reducing the number of components. These advancements open new possibilities for applications requiring compact and efficient power converters, such as renewable energy systems, electric vehicles, and portable power supply systems. This work underscores the importance of continuous innovation in power converter design and lays the groundwork for future research aimed at optimizing converter topologies. A detailed discussion of the operating principles and modeling of the converter is provided. Furthermore, simulation outcomes highlighting differences in steady-state duration, output voltage, input current ripple, and operational efficiency are shared. The results from an experimental test bench are also presented to corroborate the efficacy of the improved converter.

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Output Voltage Ripple Reduction in a Symmetric Multistage-Stacked Boost Architecture (MSBA) Converter

2021 , Rosas-caro, Julio

This article proposes a different operation mode in a recently proposed converter, the multistage-stacked boost architecture (MSBA) converter working under the symmetric operation mode. The operation mode of the converter is analyzed with a modified pulse width modulation (PWM) scheme, in which the switching function of transistors is obtained from an interleaved scheme. The results show that the modified PWM results in a similar operation of the converter, with a reduced output voltage ripple, without increasing the switching frequency. A mathematical model of the converter is provided, the output voltage ripple calculation is performed in the traditional, and the modified PWM scheme, simulation, and experimental results are provided to verify the operation mode and the obtained equations.

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Fuel-cell power conversion system based on double dual topologies

2022 , Enrique Garza-Arias , Jesus E. Valdez-Resendiz , Rosas-caro, Julio , Mayo Maldonado, Jonathan , Victor M. Sanchez , Gerardo Escobar , Rodríguez Vázquez, Alma Nayeli , Pedro M. Rodrigo

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Corrigendum to “Quadratic buck–boost converter with positive output voltage and continuous input current for PEMFC systems” [Int J Hydrogen Energy 42 (2017) 30400–30406]

2018 , Rosas-caro, Julio , Victor M. Sanchez , Jesus E. Valdez-Resendiz , Mayo Maldonado, Jonathan , Francisco Beltran-Carbajal , Valderrabano-Gonzalez, Antonio

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Quadratic boost converter based on stackable switching stages

2018 , Jesus E. Valdez‐Resendiz , Rosas-caro, Julio , Mayo Maldonado, Jonathan , Armando Llamas‐Terres

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Single-inductor resonant switched capacitor voltage multiplier with safe commutation

2014 , Rosas-caro, Julio , Mayo Maldonado, Jonathan , Fernando Mancilla-David , Valderrabano-Gonzalez, Antonio , Francisco Beltran Carbajal , Victor M. Sanchez

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Quadratic buck–boost converter with positive output voltage and continuous input current for PEMFC systems

2017 , Rosas-caro, Julio , Victor M. Sanchez , Jesus E. Valdez-Resendiz , Mayo Maldonado, Jonathan , Francisco Beltran-Carbajal , Valderrabano-Gonzalez, Antonio

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Continuous input-current buck-boost DC-DC converter for PEM fuel cell applications

2017 , Jesus E. Valdez-Resendiz , Victor M. Sanchez , Rosas-caro, Julio , Mayo Maldonado, Jonathan , J.M. Sierra , Romeli Barbosa

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Storage and Dissipation Limits in Resonant Switched-Capacitor Converters

2018 , Mayo Maldonado, Jonathan , T. M. Maupong , Jesús E. Valdez-Reséndiz , Rosas-caro, Julio

The purpose of this manuscript is twofold, first we introduce an energy-based modeling framework for the analysis of resonant switched-capacitor (SC) converters and second we demonstrate that energy storage and dissipation in resonant SC with ideal switches are bounded by a fundamental physical limit that, up until now, has been only associated with the special case of pure SC topologies. For instance, we show that the maximum energy stored in the small size inductors in resonant SC converters is equal to the energy that would be dissipated by their purely SC counterpart. The presented analysis permits the computation of resonant inductances in terms of maximum current peak values, which is experimentally validated. Furthermore, we introduce a relative loss factor that permits determining the efficiency of a design for a general case in the presence of parasitic resistances. These results corroborate that migrating to resonant SC technologies is one of the most compelling alternatives to overcome well-known disadvantages in pure SC topologies.

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Model-Based and Model-Free Control of DC–DC Converters With High-Order Dynamics and Limited Measurements

2021 , Javier Loranca-Coutino , Mayo Maldonado, Jonathan , Gerardo Escobar , Carlos A. Villarreal-Hernandez , Thabiso M. Maupong , Jesus Elias Valdez-Resendiz , Rosas-caro, Julio

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