Dr. Abraham Sanchez
TecNM/CENIDET
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Academic Career Length
7Years (2020-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
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Journal Article
HAHeriberto Adamas-Pérez
Heriberto Adamas-Pérez
Mario Ponce-SilvaJMJesús Mina
Jesús MinaAbraham SanchezOROmar Rodríguez-Benítez
Omar Rodríguez-Benítez
OROscar Miguel Rodríguez-Benítez
Oscar Miguel Rodríguez-Benítez
This paper aims to propose a new sizing approach to reduce the footprint and optimize the performance of an LCL filter implemented in photovoltaic systems using grid-connected single-phase microinverters. In particular, the analysis is carried out on a single-phase full-bridge inverter, assuming the following two conditions: (1) a unit power factor at the connection point between the AC grid and the LCL filter; (2) a control circuit based on unipolar sinusoidal pulse width modulation (SPWM). In particular, the ripple and harmonics of the LCL filter input current and the current injected into the grid are analyzed. The results of the Simulink simulation and the experimental tests carried out confirm that it is possible to considerably reduce filter volume by optimizing each passive component compared with what is already available in the literature while guaranteeing excellent filtering performance. Specifically, the inductance values were reduced by almost 40% and the capacitor value by almost 100%. The main applications of this new design methodology are for use in single-phase microinverters connected to the grid and for research purposes in power electronics and optimization.
Journal Article
Mario Ponce-Silva
Daniel Salazar-Pérez
Oscar Rodríguez BenítezLVLuis Gerardo Vela-Valdés
Luis Gerardo Vela-ValdésAbraham Sanchez
Juan Aqui +4
The main contribution of this paper is to show a new AC/DC converter based on the rearrangement of the flyback converter. The proposed circuit only manages part of the energy and the rest is delivered directly from the source to the load. Therefore, with the new topology, the efficiency is increased, and the stress of the components is reduced. The rearrangement consist of the secondary of the flyback is placed in parallel with the load, and this arrangement is connected in series with the primary side and the rectified voltage source. The re-arranged flyback is only a reductive topology and with no magnetic isolation. It was studied as a power supply for LEDs. A low frequency averaged analysis (LFAA) was used to determine the behavior of the proposed circuit and an equivalent circuit much easier to analyze was obtained. To validate the theoretical analysis, a design methodology was developed for the re-arranged flyback converter. The designed circuit was implemented in a 10 W prototype. Experimental results showed that the converter has a THDi = 21.7% and a PF = 0.9686.
Journal Article
Oscar Rodríguez BenítezMario Ponce-SilvaJuan AquiAbraham SanchezLVLuis Gerardo Vela-Valdés
Luis Gerardo Vela-Valdés
Claudia Cortes-Garcia +1
This paper focuses on the main reasons of low efficiency in a current-fed DC-DC resonant converter applied to photovoltaic (PV) isolated systems, comparing the effects derived by the overlapping time in the gate-signals (gate-source voltage) combining silicon (Si), silicon carbide (SiC), and gallium nitride (GaN)-based power devices. The results show that unidirectional switches (metal–oxide–semiconductor field-effect transistors (MOSFETs) plus diode) present hard switching as a result of the diode preventing the MOSFET capacitance of being discharged. The effectiveness of the converter was verified with a 200-W prototype with an input voltage range of 0–30.3 V, an output voltage of 200 V, and a switching frequency of 200 kHz. The reduction losses by applying GaN versus Si and SiC technologies are 66.49% and 53.57%, respectively. Alternatively, by applying SiC versus Si devices the reduction loss is 27.84%. Finally, according to the results, 60% of losses were caused by the diodes on both switches.
Journal Article
Iván Alfonso Reyes-PortilloAbraham SanchezJMJorge Alberto Morales-Saldaña
Jorge Alberto Morales-SaldañaJMJesús Mina
Jesús MinaENEdgardo Netzahuatl
Edgardo NetzahuatlEREricka Reyes-Sánchez
Ericka Reyes-Sánchez +2
The excessive use of fossil fuels has caused great concern due to modern environmental problems, particularly air pollution. The above situation demands that different areas of research aim at a sustainable movement to reduce CO emissions caused by non-renewable organic fuels. A solution to this problem is the use of Electric Vehicles (EV) for mass transportation of people. However, these systems require high-power DC/DC converters capable of handling high current levels and should feature high efficiencies to charge their batteries. For this application, a single-stage converter is not viable for these applications due to the high current stress in a switch, the low power density, and its low efficiency due to higher switching losses. One solution to this problem is Multiphase Converters, which offer high efficiency, high power density, and low current ripple on the battery side. However, these characteristics are affected by the current imbalance in the phases. This paper is focused on the study of the effects of the current imbalance in a Multiphase Buck Converter, used as an intermediate cover between a power supply and the battery of an EV. Analyzing the efficiency and thermal stress parameters in different scenarios of current balance and current imbalance in each phase.
Journal Article
MTMa. Del Carmen Toledo-Pérez
Ma. Del Carmen Toledo-PérezRVRodolfo Amalio Vargas-Méndez
Rodolfo Amalio Vargas-MéndezAbraham Sanchez
GLORIA LILIA OSORIO GORDILLOLVLuis Gerardo Vela-Valdés
Luis Gerardo Vela-ValdésOROmar Rodriguez
Omar Rodriguez +1
In this article, a comprehensive review of electrical microgrids is presented, emphasizing their increasing importance in the context of renewable energy integration. Microgrids, capable of operating in both grid-connected and standalone modes, offer significant potential for providing energy solutions to rural and remote communities. However, the inclusion of diverse energy sources, energy storage systems (ESSs), and varying load demands introduces challenges in control and optimization. This review focuses on hybrid microgrids, analyzing their operational scenarios and exploring various optimization strategies and control approaches for efficient energy management. By synthesizing recent advancements and highlighting key trends, this article provides a detailed understanding of the current state and future directions in hybrid microgrid systems.
19 June 2020 in International Journal of Hydrogen Energy
Journal Article
MLM. López-Pérez
M. López-PérezAbraham SanchezUCU. Cano-Castillo
U. Cano-CastilloFLF. Loyola-Morales
F. Loyola-MoralesAbout Me
Abraham Claudio Sánchez obtained his bachelor (1983) and M.Sc.(1987) degrees in Electrical Engineering from the Instituto Tecnologico de la Laguna, and Diplome d’Etudes Avancees (1992) and PhD (1995) degree in Electrical Engineering from the Institut National Politéchnique de Grenoble (INPG), France. He is a full-time Professor/Researcher at CENIDET, Mexico, in the Power Electronics Group.
His field of major interest and experience is the characterization and modeling of power semiconductor devices, and he has an interest in other related topics like AC motor control, fault detection, and electromobility, topics in which he has supervised 10 PhDs, 42 MSc, and 4 B.Sc. theses. He has 2 patents, more than 145 papers in recognized journals, and national and international conference papers. Dr. Claudio has participated in and has been responsible for more than 40 research projects supported by the Mexican Government (ECOS, Conacyt, TecNM, FESE) and by industries (Vogar, Nissan, Infinium, UAM); He has been responsible for a project related to the development of an electric vehicle based on hydrogen fuel cells, supported by
SENER-CONACYT. Nowadays, he holds member-level status at the SNI but was an SNI member since 1996. He was President of Power Electronic and a Coordinator of student’s activities (1998), as well as a Member at Large (1996-1997). Dr. Claudio Sánchez has been a reviewer for several journals and international and national conferences.