Ruiz-Martinez, O.F.
Main Affiliation
Preferred name
Ruiz-Martinez, O.F.
Official Name
Ruíz Martínez, Omar Fernando
ORCID
0000-0002-0853-4950
Researcher ID
G-7079-2018
Scopus Author ID
57212136157
17 results
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Item type:Publication, Quadratic boost converter with low‐output‐voltage ripple(2020); Scopus© Citations 41 3 2 - Some of the metrics are blocked by yourconsent settings
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Item type:Publication, Quadratic Boost Converter with Optimized Switching Ripple Based on the Selection of Passive Components(2024); ; This work introduces a boost converter with quadratic gain. Its main advantage compared to well-known similar quadratic boost converters is that it requires capacitors with a relatively small capacitance and inductors with small inductance, leading to a reduction in the size or stored energy while performing a power conversion of similar power rating and the same switching ripples in both the input current and the output voltage. It is inspired by the recently introduced ISB converter and uses a specific PWM method. This results in achieving switching ripple constraints while using smaller energy storage elements (capacitors and inductors). The updated converter offers the same voltage gain compared to the conventional quadratic boost topology with the benefit of compact component sizes. While it has more passive elements, they are of reduced size. An analysis of energy storage revealed that this new converter uses only half the energy in inductors and 14% in capacitors when compared to specific design parameters.21 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Power Converter Design for Pulsed Electric Field-Based Milk Processing: A Proof of Concept(MDPI AG, 2025-06-21); ; <jats:p>The microbiological safety of milk can be ensured through heat processing; however, this method has a negative effect on the sensory profile of this food product. Emerging technologies could be used as an alternative process for guaranteeing innocuity and maintaining sensory changes. An alternative is to evaluate pulsed electric field (PEF) electroporation, which is a method of processing cells using short pulses of a strong electric field. PEF has the potential to be a type of alternative low-temperature pasteurization process that consists of high-frequency voltage pulsations. Specifically, the presented work is a proof of concept for the design of a converter capable of generating a PEF to feed a load that meets the impedance characteristics of milk. The proposed converter is simulated using PLECS software (4.9.6 version) under impedance change scenarios that emulate variations in milk throughout the entire process. This research proposes the modification of a classic Vienna rectifier (adding an MBC—Multilevel Boost Converter structure) to supply a pulsating signal that could be used for low-temperature processes of milk to guarantee proper pasteurization. The characteristics of the generated high-voltage pulse make it feasible to quickly process the real sample. The control law design considers a regulation loop to achieve a voltage in the range of kV and a switching-type control law that activates switches in MMC arrays. These switches are activated randomly to avoid transients that cause significant stress on them.</jats:p> - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Beyond Chaos in Fractional-Order Systems: Keen Insight in the Dynamic Effects(2024); ; María del Carmen Heras-Sánchez<jats:p>Fractional calculus (or arbitrary order calculus) refers to the integration and derivative operators of an order different than one and was developed in 1695. They have been widely used to study dynamical systems, especially chaotic systems, as the use of arbitrary-order operators broke the milestone of restricting autonomous continuous systems of order three to obtain chaotic behavior and triggered the study of fractional chaotic systems. In this paper, we study the chaotic behavior in fractional systems in more detail and characterize the geometric variations that the dynamics of the system undergo when using arbitrary-order operators by asking the following question: is the Lyapunov exponent sufficient to describe the dynamical variations in a chaotic system of fractional order? By quantifying the convex envelope generated by the 2D projection of the system into all its phase portraits, the changes in the area of the system, as well as the volume of the attractor, are characterized. The results are compared with standard metrics for the study of chaotic systems, such as the Kaplan–Yorke dimension and the fractal dimension, and we also evaluate the frequency fluctuations in the dynamical response. It is found that our methodology can better describe the changes occurring in the systems, while the traditional dimensions are limited to confirming chaotic behaviors; meanwhile, the frequency spectrum hardly changes. The results deepen the study of fractional-order chaotic systems, contribute to understanding the implications and effects observed in the dynamics of the systems, and provide a reference framework for decision-making when using arbitrary-order operators to model dynamical systems.</jats:p>2 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Scopus© Citations 1 13 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Current-Mode Controller For an HB-NPC Inverter Using the Virtual-Ground Trajectory for Power Injection in PV Systems(2020)17 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Data-Driven Based Control Applied to DC Network Converters for Voltage Bus Stabilization(2020); 11 1