Robles-Campos, Héctor R.

Main Affiliation

Facultad de Ingeniería - CampGDL

Preferred name

Official Name

Robles Campos, Héctor

ORCID

0000-0001-7825-5458

Researcher ID

GPW-8416-2022

Scopus Author ID

57192552877

Now showing 1 - 10 of 23

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Guest Editorial: Advances in Non‐Isolated DC–DC Converters and Their Applications
(Institution of Engineering and Technology (IET), 2026-01)
Rosas-Caro, Julio
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Valdez‐Resendiz, Jesus E.
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Robles-Campos, Héctor R.
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Gopal, Yatindra
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Babaiahgari, Bhanu
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A Single-Output-Filter Double Dual Ćuk Converter
(2024)
Robles-Campos, Héctor R.
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Rosas-Caro, Julio
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Mayo Maldonado, Jonathan
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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.
26
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Ripple‐Free Input Current Quadratic Converter Based on Watkin–Johnson Topology
(Institution of Engineering and Technology (IET), 2025-01)
Brenda Lizeth Reyes‐García
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Pedro Martín García‐Vite
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Robles-Campos, Héctor R.
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Marco Antonio Coronel‐García
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Rosas-Caro, Julio
This article proposes a power electronics converter capable of providing high voltage gain while keeping a high‐quality input current ripple operating with low duty cycle. The technique for achieving the zero input current ripple at a selected duty cycle consists of extracting two inductor currents from the source in a counter‐phase manner. The technique is similar to those employed in interleaved converters, maintaining the high voltage gain. The quadratic‐type voltage gain makes the proposed converter suitable for low‐voltage renewable energy sources, such as PV panel generation. Another important topology feature is the common reference to the output voltage; that is, the load and source share the negative terminals. The high voltage gain is achieved by cascading two particular power cells. On the input side, a modified buck‐boost converter is connected, while the second stage consists of an H‐bridge based on the Watkin–Johnson topology. The H‐bridge configuration consists of two capacitors, one inductor, and a pair of transistors and diodes to control the voltage gain, which provides polarity selection flexibility. This paper includes the mathematical development in continuous conduction mode operation, providing design guidelines. Besides, two commutation techniques are proposed to obtain direct or inverse polarity. The modeling is validated via simulation, and an experimental lab‐scale corroborates its performance. The validation includes open‐loop performance, demonstrating low input current ripple, and a closed‐loop configuration that confirms proper output voltage regulation.
33
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Optimal Operation of the Voltage-Doubler Boost Converter through an Evolutionary Algorithm
(2021)
Cesar Ibarra-Nuño
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Alejo-Reyes, Avelina
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Rodriguez Martinez, Daniela
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Laguna Juárez, Carlos Daniel
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Rosas-caro, Julio
<jats:p>This manuscript presents the numerical optimization (through a mathematical model and an evolutionary algorithm) of the voltage-doubler boost converter, also called the series-capacitor boost converter. The circuit is driven by two transistors, each of them activated according to a switching signal. In the former operation, switching signals have an algebraic dependence from each other. This article proposes a new method to operate the converter. The proposed process reduces the input current ripple without changing any converter model parameter, only the driving signals. In the proposed operation, switching signals of transistors are independent of each other, providing an extra degree of freedom, but on the other hand, this produces an infinite number of possible combinations of duty cycles (the main parameter of switching signals) to achieve the desired voltage gain. In other words, this leads to a problem with infinite possible solutions. The proposed method utilizes an evolutionary algorithm to determine the switching functions and, at the same time, to minimize the input current ripple of the converter. A comparison made between the former and the proposed operation shows that the proposed process achieves a lower input current ripple while achieving the desired voltage gain.</jats:p>
1 11Scopus© Citations 2
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Failure mode and effects analysis and sensitivity analysis for a neutral point re-injection multi-pulse voltage source converter
(Elsevier BV, 2025-09)
Valderrabano-Gonzalez, Antonio
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F. Beltran-Carbajal
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Robles-Campos, Héctor R.
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R. Tapia-Olvera
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Rosas-Caro, Julio
Sensitivity Analysis plays a crucial role in the design, control, and optimization of multi-pulse Voltage Source Converters. It helps engineers assess how variations in parameters influence system performance, enabling the development of more efficient and robust converters. This study presents some Failure Modes and Effects Analysis that intends to identify the most affected components when a gate disconnection failure occurs, making them critical points for stress management. Additionally, the most vulnerable components when gates remain connected to high value are distinguished. Verifying the voltage output shape, it can be noticed that RMS voltage measurements are not a reliable indicator for tracking failure, whereas THD offers a more effective solution. Understanding these failure modes is essential for refining the design and control strategies of electronic converters, particularly in applications such as motor control and StatCom. Sensitivity analysis also strengthens control algorithms, ensuring that they can effectively accommodate parameter fluctuations while aiding in fault diagnosis and failure prediction. The early detection of switch malfunctions in power converters is essential for maintaining system reliability, safety, performance, and cost efficiency. Timely identification allows for proactive maintenance, preventing extensive damage and ensuring continuous operation. As the converters become increasingly integral to various applications, implementing reliable fault detection mechanisms is essential for sustaining their optimal performance and long-term functionality.
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Practical Evaluation of an Optimized LES-QB Converter: Implementation and Experimentation
(IEEE, 2025-11-12)
Solís-Rodriguez, Jose
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Rosas-Caro, Julio
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Elias Valdez-Resendiz, Jesus
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Guillen, Daniel
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Robles-Campos, Héctor R.
This paper presents a study related to a recently proposed quadratic boost converter topology: the so-called Low Energy Storage Quadratic Boost (LES-QB) converter. Unlike traditional quadratic boost converters, the LES-QB converter achieves high voltage gain with reduced energy storage in its passive components, enabling more compact designs. Recently, an improved operation was proposed based on the optimized selection of capacitors. This work focuses on the implementation and validation of the optimized design. The converter was built and tested, and its operation was compared against that of a non-optimized configuration. The results demonstrate that the correct selection of capacitors leads to a reduced switching ripple without increasing the size of the converter. Experimental results are provided.
23
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Modeling, Modulation and Control of Hexverter-Based Modular Multilevel Converters
(University of Colorado Denver, 2022)
Robles-Campos, Héctor R.
Electrical power extraction from renewable energy sources such as photovoltaics (PV), wind farms, and some others, have their own technical challenges. It is necessary to perform the power processing tasks according to the nature of the power supply and, at the same time, it is required to be compliant with technical regulations and particular needs of final users. These tasks are achieved with the development of power electronics converters and suitable control systems. Modular multilevel converters (MMCs) have been during the last years, and will continue to be in the near future, a trending research topic. To better process the electrical power, MMCs can be used where two or three level power converters are used today. This is essentially due to multiple advantages, such as, (i) inherent fault tolerance or some times called redundancy, (ii) application in medium and high power levels, (iii) high scalability: in function of the number of power modules, (iv) better quality of output power, and (v) comparatively low switching frequency.
17 1
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Detailed Assessment of Modulation Strategies for Hexverter–Based Modular Multilevel Converters
(2022)
Robles-Campos, Héctor R.
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Fernando Mancilla-David
<jats:p>Modular multilevel converters are playing a key role in the present and future development of topologies for medium–to–high–power applications. Among this category of power converters, there is a direct AC–AC modular multilevel converter called “Hexverter”, which is well suited to connect three–phase AC systems operating at different frequencies. This topology is the subject of study in this manuscript. The complete Hexverter system is composed of an Hexverter power converter and several control layers, namely, a “virtual VC2 controller”, a branch current controller in a two–frequency dq reference frame, a modulator, and a voltage balancing algorithm. The paper presents a thorough description and analysis of the entire Hexverter system, providing research contributions in three key aspects: (i) modeling and control in a unified two–frequency dq framework; (ii) developing a “virtual VC2 controller” to dynamically account for Hexverter’s active power losses allowing to achieve active power balance on the fly; and (iii) a comparative evaluation of modulation strategies (nearest level control and phase disposition–sinusoidal pulse width modulation). To this end, a detailed switched simulation was implemented in the PSCAD/EMTDC software platform. The proposed “virtual VC2 controller” is evaluated through the measurement of its settling time and calculation of active power losses. Each modulation technique is assessed through total harmonic distortion and frequency spectrum of the synthesized three–phase voltages and currents. The results obtained suggest that the control scheme is able to properly regulate the Hexverter system under both modulation strategies. Furthermore, the “virtual VC2 controller” is able to accurately determine the active power loss, which allows the assessment of the efficiency of the modulation strategies. The nearest level control technique yielded superior efficiency.</jats:p>
Scopus© Citations 4 1 21
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A Two-Phase Sixth-Order Boots Converter with Small Passive Components
(2023)
Rosas-Caro, Julio
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Dueñas-García, Iván Emmanuel
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Robles-Campos, Héctor R.
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Posada, Johnny
A two-phase sixth order (2P6O) non-isolated boost converter is introduced in this article with an improved operation and an innovative design that considers an interleaved switching strategy for the transistors. The result is that this 2P6O converter achieves outstanding performance. In this article, the 2P6O converter is compared against the well-known and very competitive traditional interleaved boost converter for a design exercise with similar performance and equivalent switching ripples. The 2P6O contains more passive components, but the design showed that those passive components are smaller in terms of stored energy. The introduction of the additional inductor and capacitor in the 2P6O converter was compensated by the fact that all energy-stored elements became smaller. This advancement can provide more compact, efficient, and economical solutions in various power electronics applications. Experimental results are provided to demonstrate the principle of the proposition.
1 21Scopus© Citations 1
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Selective harmonic elimination for the modular multilevel converter
(2016)
Robles-Campos, Héctor R.
;
Fernando Mancilla-David
2 4

Robles-Campos, Héctor R.

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