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

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Active Disturbance Rejection Control of a Magnetic Suspension System

2014 , Francisco Beltran-Carbajal , Valderrabano-Gonzalez, Antonio , Antonio R. Favela-Contreras , Rosas-caro, Julio

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Output feedback control for robust tracking of position trajectories for DC electric motors

2014 , Francisco Beltran-Carbajal , Antonio Favela-Contreras , Valderrabano-Gonzalez, Antonio , Rosas-caro, Julio

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An Evolutionary Algorithm-Based PWM Strategy for a Hybrid Power Converter

2020 , Rodríguez Vázquez, Alma Nayeli , Alejo-Reyes, Avelina , Erik Cuevas , Francisco Beltran-Carbajal , Rosas-caro, Julio

In the past years, the interest in direct current to direct current converters has increased because of their application in renewable energy systems. Consequently, the research community is working on improving its efficiency in providing the required voltage to electronic devices with the lowest input current ripple. Recently, a hybrid converter which combines the boost and the Cuk converter in an interleaved manner has been introduced. The converter has the advantage of providing a relatively low input current ripple by a former strategy. However, it has been proposed to operate with dependent duty cycles, limiting its capacity to further decrease the input current ripple. Independent duty cycles can significantly reduce the input current ripple if the same voltage gain is achieved by an appropriate duty cycle combination. Nevertheless, finding the optimal duty cycle combination is not an easy task. Therefore, this article proposes a new pulse-width-modulation strategy for the hybrid interleaved boost-Cuk converter. The strategy includes the development of a novel mathematical model to describe the relationship between independent duty cycles and the input current ripple. The model is introduced to minimize the input current ripple by finding the optimal duty cycle combination using the differential evolution algorithm. It is shown that the proposed method further reduces the input current ripple for an operating range. Compared to the former strategy, the proposed method provides a more balanced power-sharing among converters.

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Bootstrap cascaded multilevel converter

2014 , Jose Genaro Gonzalez-Hernandez , Jose Eduardo Martinez-Bernal , Valderrabano-Gonzalez, Antonio , Rosas-caro, Julio , Francisco Beltran-Carbajal , Juan Manuel Ramirez-Arredondo , Juan Miguel Gonzalez-Lopez

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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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Sliding Mode Speed Control in Synchronous Motors for Agriculture Machinery: A Chattering Suppression Approach

2024 , David Marcos-Andrade , Francisco Beltran-Carbajal , Ivan Rivas-Cambero , Hugo Yañez-Badillo , Antonio Favela-Contreras , Rosas-Caro, Julio

Synchronous motors have extended their presence in different applications, specifically in high-demand environments such as agronomy. These uses need advanced and better control strategies to improve energy efficiency. Within this context, sliding mode control has demonstrated effectiveness in electric machine control due to its advantages in robustness and quick adaptation to uncertain dynamic system disturbances. Nevertheless, this control technique presents the undesirable chattering phenomenon due to the discontinuous control action. This paper introduces a novel speed integral control scheme based on sliding modes for synchronous motors. This approach is designed to track smooth speed profiles and is evaluated through several numeric simulations to verify its robustness against variable torque loads. This approach addresses using electric motors for different applications such as irrigation systems, greenhouses, pumps, and others. Moreover, to address the chattering problem, different sign function approximations are evaluated in the control scheme. Then, the most effective functions for suppressing the chattering phenomenon through extensive comparative analysis are identified. Integral compensation in this technique demonstrates improvement in motor performance, while sign function approximations show a chattering reduction. Different study cases prove the robustness of this control scheme for large-scale synchronous motors. The simulation results validate the proposed control scheme based on sliding modes with integral compensation, by achieving chattering reduction and obtaining an efficient control scheme against uncertain disturbances in synchronous motors for agronomy applications.

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A Dynamic Motion Tracking Control Approach for a Quadrotor Aerial Mechanical System

2020 , Hugo Yañez-Badillo , Francisco Beltran-Carbajal , Ruben Tapia-Olvera , Valderrabano-Gonzalez, Antonio , Antonio Favela-Contreras , Rosas-caro, Julio , Pierangelo Masarati

This paper deals with the reference trajectory tracking problem and simultaneous active disturbance suppression on a class of controlled aerial mechanical systems by processing measurable output signals. A novel dynamic control method for desired motion reference trajectory tracking for quadrotor helicopters is introduced. Measurements of position output signals for efficient and robust tracking of motion profiles specified for the unmanned aerial vehicle are only required. Thus, differentiation of signals and real-time estimation of disturbances affecting the multi-input multioutput, underactuated nonlinear dynamic system are unnecessary. The presented active control approach can be directly extended for a class of vibrating mechanical systems. Analytical, experimental, and numerical results are presented to prove the satisfactory performance of the proposed trajectory tracking control approach for considerably perturbed operating scenarios.

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Single phase angle tracking method for power switches gating synchronization

2013 , Valderrabano-Gonzalez, Antonio , Rosas-caro, Julio , Rubén Tapia-Olvera , Francisco Beltran-Carbajal , Juan Francisco Gomez-Ruiz

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Extended PI Feedback Tracking Control for Synchronous Motors

2019 , Francisco Beltran-Carbajal , Ruben Tapia-Olvera , Irvin Lopez-Garcia , Valderrabano-Gonzalez, Antonio , Rosas-caro, Julio , Jose Luis Hernandez-Avila

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Differential Evolution Based Algorithm for Optimal Current Ripple Cancelation in an Unequal Interleaved Power Converter

2021 , Rosas-caro, Julio , Pedro M. García-Vite , Rodríguez Vázquez, Alma Nayeli , Mendoza, Abraham , Alejo-Reyes, Avelina , Erik Cuevas , Francisco Beltran-Carbajal

This paper proposes an optimal methodology based on the Differential Evolution algorithm for obtaining the set of duty cycles of a recently proposed power electronics converter with input current ripple cancelation capability. The converter understudy was recently introduced to the state-of-the-art as the interleaved connection of two unequal converters to achieve low input current ripple. A latter contribution proposed a so-called proportional strategy. The strategy can be described as the equations to relate the duty cycles of the unequal power stages. This article proposes a third switching strategy that provides a lower input current ripple than the proportional strategy. This is made by considering duty cycles independently of each other instead of proportionally. The proposed method uses the Differential Evolution algorithm to determine the optimal switching pattern that allows high quality at the input current side, given the reactive components, the switching frequency, and power levels. The mathematical model of the converter is analyzed, and thus, the decision variables and the optimization problem are well set. The proposed methodology is validated through numerical experimentation, which shows that the proposed method achieves lower input current ripples than the proportional strategy.

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