Showing papers in "3C Tecnología in 2021"
6 citations
TL;DR: In this article, the authors present a simplified energy monitoring system, and its acquired data, that may be used to achieve such real-time results that can be used for making an informed decision.
Abstract: The management of any process really requires sensing, transferring and recording of relevant data for analysis purposes so as to make an informed decision. In fact, smart manufacturing requires sufficient knowledge to be available to the decision-maker to ensure that any system runs efficiently and effectively, which may include an energy generation system. The purpose of this paper is to present a simplified energy monitoring system, and its acquired data, that may be used to achieve such real-time results that can be used to make an informed decision. An experimental methodology is applied where empirical quantitative data is derived from a residential home in a suburb of a city having a population of around half a million people. Nine electrical circuits are monitored systematically using a current sensor where data is transferred to Google Sheets using an Arduino microprocessor and ESP8266 module. Custom made power usage graphs are directly visible via any electronic device, for real-time results. It is recommended to make more use of such cost-effective simplified systems in an attempt to provide sufficient knowledge to make an informed decision that may contribute to identifying energy discrepancies in any given system with the aim of improving energy efficiency.
5 citations
TL;DR: In this article, a variable duty-cycle (VDC) control scheme is proposed to increase the efficiency of buck converter operating in discontinuous conduction mode (DCM), which can achieve high power factor (PF) and reduce the harmonics caused during AC to DC conversion.
Abstract: Electronic devices require AC to DC converter (rectifier) to convert AC voltage from the grid to DC voltage for the electronics and its result is low power factor (PF) and harmonic current injection into the system. Nowadays, power factor correction (PFC) converters are being widely used which can achieve high power factor (PF) and reduce the harmonics caused during AC to DC conversion and buck PFC converter is one of mostly used converter. On the other hand, if this converter works with constant duty-cycle (CDC) control scheme, the overall losses are more and efficiency is less. In order to increase the efficiency of buck converter operating in discontinuous conduction mode (DCM), a variable duty-cycle (VDC) control scheme is proposed. The method of fitting VDC control scheme is given for making implementation of circuit simpler. The performance of buck converter is compared with CDC and VDC control scheme in terms of efficiency. For verifying the validity of proposed technique, the simulation results are carried out. The object of the research paper is to propose the control scheme to achieve high PF for DCM buck converter by only modulating the duty-cycle of buck switch.
3 citations
TL;DR: The control scheme to realize high PF for CRM buck converter by only modulating the on-time of buck switch and without need of extra converter to work with buck converter is proposed.
Abstract: The buck converter is generally utilized in many applications because of various advantages like maintaining high efficiency for the wide range of input voltage, cost reduction, low output voltage, protection against inrush current and lifetime improvement. However, when on-time of buck converter is kept constant, the input voltage and current remains out of phase that cause’s low PF and high total harmonic distortion (THD). Therefore a power factor improvement technique is implemented in this paper that permits the average input current sinusoidal without need of extra converter to work in cascade with buck converter. The critical conduction mode (CRM) buck converter operating with constant on-time (COT) control scheme have low PF because of harmonic contained input current waveform. So in order to make the input current waveform as a sinusoidal by changing the on-time of buck switch, a variable-on-time (VOT) control scheme for CRM buck converter is proposed in this paper. The theoretical analysis is given, and the simulation results confirm the advantages of the proposed control scheme. The object of the research paper is to propose the control scheme to realize high PF for CRM buck converter by only modulating the on-time of buck switch and without need of extra converter to work with buck converter.
2 citations
TL;DR: A modified variable-on-time (VOT) control scheme for Integrated BBC can achieve high PF with low THD by utilizing the input and output voltage to modulate the on-time of only buck switch.
Abstract: In today’s modern era low power factor (PF) is major issue in the field of power electronics which has made our life, simpler, easier and comfortable. However, with this comfort and easiness this technology brings power quality issues because it is centered on solid-state devices. These issues introduce harmonic contained current or distorted current which has several drawbacks like high power loss, voltage distortion and EMI compatibility issues etc. The conventional boundary conduction mode (BCM) integrated buck-boost converter (BBC) operating with constant on-time control (COT) control scheme have low PF with high total harmonic distortion (THD) because of harmonic contained input current waveform. So, in order to make the input current waveform as a sinusoidal by changing the on-time of only buck switch, a modified variable-on-time (VOT) control scheme for Integrated BBC is proposed in this paper. The VOT control scheme can achieve high PF with low THD by utilizing the input and output voltage to modulate the on-time of only buck switch. The theoretical analysis is given, and the simulation results confirm the advantages of the proposed control scheme. The object of the research paper is to propose the control scheme to realize unity PF for CRM buck converter by only modulating the on-time of buck switch. The research methodology is based on: Input PF analysis of buck converter with traditional control scheme; Introduction of proposed control scheme; comparative analysis and simulation results to show the effectiveness of proposed control scheme.
2 citations
1 citations
TL;DR: In this article, a non-destructive methodology has been used, based on the collection, processing, and interpretation of the deflections measured on the road surface with the impact deflectometer equipment; these deflections reflect a response of the structural package under a given load.
Abstract: This research analyzes the incidence and efficiency of impact deflectometry to evaluate and design the road reinforcements of a section of the central highway. For this study, a "non-destructive" methodology has been used, based on the collection, processing, and interpretation of the deflections measured on the road surface with the impact deflectometer equipment; these deflections reflect a response of the structural package under a given load, its measurement is simple, fast and "non-destructive," that is, we do not alter the structural package, and above all, we do not cause vehicular congestion as it would be with the conventional methodology. The deflections are analyzed using the back-calculation technique, which allows us to know the total Structural Number in the function of the characteristics of rigid pavement, obtaining a structural number Sn of 6.2 and 5.6 for the right and left the roadway, respectively. This research presents the results of the current condition of the road under study. It proposes a technique for calculating the Structural Number of an asphalt reinforcement on concrete from the back-calculation.
1 citations
TL;DR: In this paper, an exhaustive search of development methodologies focused on the production of mobile applications was carried out to carry out an analytical and field comparison. But the results of the study revealed that Scrum covers a large part of the elements and characteristics that would benefit the development of mobile application.
Abstract: espanolEl desarrollo de aplicaciones moviles en la actualidad tiene una gran aceptacion gracias al avance de la tecnologia y produccion de toda clase de dispositivos que permiten a los usuarios realizar tareas cotidianas ya sean de entretenimiento o laboral. Por ende, la necesidad de producir software de calidad y para ello se han desarrollado multiples metodologias que buscan optimizar procesos a traves de buenas practicas y principios agiles. El objetivo de la presente investigacion es realizar una busqueda exhaustiva de las metodologias de desarrollo enfocadas a la produccion aplicaciones moviles para realizar una comparacion de caracter analitica y de campo. Como resultado se obtuvo que Scrum abarca gran parte de los elementos y caracteristicas que beneficiarian al desarrollo de aplicaciones moviles, de igual modo en el ambito profesional, las empresas desarrolladoras de software ademas de usar Mobile-D, emplean Scrum como un marco de trabajo completo que se adapta a toda clase de proyecto en cuanto al tamano. EnglishThe development of mobile applications is currently widely accepted thanks to the advancement of technology and the production of all kinds of devices that allow users to carry out daily tasks, whether they are entertainment or work. Therefore, the need to produce quality software and for this, multiple methodologies have been developed that seek to optimize processes through good practices and agile principles. The objective of this research is to carry out an exhaustive search of development methodologies focused on the production of mobile applications to carry out an analytical and field comparison. As a result, it was obtained that Scrum covers a large part of the elements and characteristics that would benefit the development of mobile applications, in the same way in the professional field, software development companies in addition to using Mobile-D, use Scrum as a complete framework that adapts to all kinds of projects in terms of size.