Ara es mostren els items 1-20 de 103

  • 1a Jornada STEP 

    García-Almiñana, Daniel; Romeral Martínez, José Luis; López, Baltasar (2010-11-24)
    Audiovisual
    Accés obert
  • A combined methodology of adaptive neuro-fuzzy inference system and genetic algorithm for short-term energy forecasting 

    Kampouropoulos, Konstantinos; Andrade Rengifo, Fabio; García Espinosa, Antonio; Romeral Martínez, José Luis (2014-02)
    Article
    Accés obert
    This document presents an energy forecast methodology using Adaptive Neuro-Fuzzy Inference System (ANFIS) and Genetic Algorithms (GA). The GA has been used for the selection of the training inputs of the ANFIS in order to ...
  • A computer model for teaching the dynamic behavior of AC contactors 

    Riba Ruiz, Jordi-Roger; García Espinosa, Antonio; Romeral Martínez, José Luis (2010-05)
    Article
    Accés obert
    AC-powered contactors are extensively used in industry in applications such as automatic electrical devices, motor starters, and heaters. In this work, a practical session that allows students to model and simulate the ...
  • A genetic algorithm approach to optimization of power peaks in an automated warehouse 

    Cárdenas Araújo, Juan José; García Espinosa, Antonio; Romeral Martínez, José Luis; Andrade Rengifo, Fabio (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
    Text en actes de congrés
    Accés obert
    The simultaneous operation of the automated storage and retrieval machines (ASRs) in an automated warehouse can increase the likelihood that high power demand peaks turn unstable the electric system. Furthermore, high ...
  • A methodology for energy prediction and optimization of a system based on the Energy Hub Concept using Particle Swarms 

    Kampouropoulos, Konstantinos; Andrade, Fabio; Cárdenas Araújo, Juan José; Romeral Martínez, José Luis (2012)
    Text en actes de congrés
    Accés obert
    In this paper, a methodology for the energy prediction for the different consumptions of a system based in the Energy Hub concept is presented. The methodology that has been used for the energy prediction is based on an ...
  • A multi-objective GA to demand-side management in an automated warehouse 

    Cárdenas Araújo, Juan José; García Espinosa, Antonio; Romeral Martínez, José Luis; Urresty Betancourt, Julio César (2009)
    Text en actes de congrés
    Accés obert
    The simultaneous operation of the automated storage and retrieval machines (ASRs) in an automated warehouse can increase the likelihood that high power demand peaks turn unstable the electric system. Furthermore, high ...
  • A novel AC-AC converter based SiC for domestic induction cooking applications 

    Salehifar, Mehdi; Moreno Eguilaz, Juan Manuel; Sala Caselles, Vicenç; Romeral Martínez, José Luis (2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents the analysis and design of a new high frequency ac-ac converter applied to domestic induction heating. The proposed topology uses only four switches to control power. Converter operation is same as a ...
  • A novel broken rotor bar fault detection method using park’s transform and wavelet decomposition 

    Salehi Arashloo Arashloo, Ramin; Romeral Martínez, José Luis; Salehifar, Mehdi (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Detection of broken rotor bars has been an important but difficult work in fault diagnosis area of induction motors. The characteristic frequency components of faulted rotor are very close to the power frequency component ...
  • A simple and robust method for open switch fault detection in power converters 

    Salehifar, Mehdi; Salehi Arashloo Arashloo, Ramin; Moreno Eguilaz, Juan Manuel; Sala Caselles, Vicenç; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    In this paper, a new fault detection method based on signal normalization using a simple trigonometric function is presented and applied to a five phase converter for fault tolerant application under nonsinusoidal unbalanced ...
  • Active control based on an estimator for the bus-pumping cancellation in the half-bridge class-d audio power amplifiers 

    Sala Caselles, Vicenç; Romeral Martínez, José Luis (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper is presented a new technique to avoid the distortion generated due to mid point voltage variations on DC-Bus of Class-D Half Bridge audio amplifiers. An usual distortion source on Class-D amplifier is the ...
  • An energy prediction method using adaptive Neuro-Fuzzy Inference System and Genetic Algorithms 

    Kampouropoulos, Konstantinos; Cárdenas Araújo, Juan José; Giacometto Torres, Francisco; Romeral Martínez, José Luis (2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This document presents an energy forecast methodology using Adaptive Neuro-Fuzzy Inference System (ANFIS) and Genetic Algorithms (GA). The GA has been used for the selection of the training inputs of the ANFIS in order to ...
  • An introduction to fault diagnosis of permanent magnet synchronous machines in master's degree courses 

    Riba Ruiz, Jordi-Roger; García Espinosa, Antonio; Romeral Martínez, José Luis; Ortega Redondo, Juan Antonio (John Wiley & Sons, 2010-08-16)
    Article
    Accés restringit per política de l'editorial
    Early fault detection and diagnosis of high-performance electric motors has been an active area of research for the past two decades. This work presents a practical session that facilitates instructing students in this ...
  • Analysis of demagnetization faults in surface-mounted permanent magnet synchronous motors with symmetric windings 

    Urresty Betancourt, Julio César; Riba Ruiz, Jordi-Roger; Saavedra Ordóñez, Harold; Romeral Martínez, José Luis (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper analyzes a surface-mounted permanent magnet synchronous motor with symmetric winding configuration running under demagnetization fault. The analysis is based on 2D FEM simulations which includes rotor magnet ...
  • Analysis of demagnetization faults in surface-mounted permanent magnet synchronous with inter-turns and phase-to-ground short-circuits 

    Urresty Betancourt, Julio César; Riba Ruiz, Jordi-Roger; Romeral Martínez, José Luis; Saavedra Ordóñez, Harold (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Demagnetization faults are troublesome in permanent magnet synchronous motors since they may greatly reduce their performance and efficiency. Additionally, the temperature of the magnets deeply influences the remanent flux ...
  • Analysis of power converters with devices of SiC for applications in electric traction systems 

    Fernández Palomeque, Efrén Esteban; Paredes, Alejandro; Romeral Martínez, José Luis; Sala, Vicent (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés obert
    This article presents the analysis of two topologies of power converters. Voltage Source Inverter (VSI) and Current Source Inverter (CSI) proposals for traction system applications, these topologies are implemented with ...
  • Análisis eléctrico del altavoz dinámico mediante modelado de anomalías mecánicas de fricción 

    Ruiz Illana, Germán; Sala Caselles, Vicenç; Ortega Redondo, Juan Antonio; Romeral Martínez, José Luis (2010)
    Text en actes de congrés
    Accés obert
    El presente trabajo busca caracterizar el efecto de la fricción del conjunto móvil con el polo o el núcleo de la estructura magnética sobre la corriente absorbida por el altavoz, una de las más relevantes anomalías mecánicas ...
  • Application of the zero-sequence voltage component to detect stator winding inter-turn faults in PMSMs 

    Urresty Betancourt, Julio César; Riba Ruiz, Jordi-Roger; Romeral Martínez, José Luis (2012-08)
    Article
    Accés restringit per política de l'editorial
    This paper develops and analyzes a methodology for detecting stator winding inter-turn faults in surface-mounted permanent magnet synchronous motors. The proposed methodology is based on monitoring the zero-sequence voltage ...
  • Bearings fault detection using inference tools 

    Delgado Prieto, Miquel; Cusido Roura, Jordi; Romeral Martínez, José Luis (In-Tech, 2011-09)
    Capítol de llibre
    Accés obert
    The most used electric machine in the industry is the Induction Motor (IM), due to its simplicity and reduced cost. The analysis of the origin of IMs failures exhibits that the bearings are the major source of fault, and ...
  • Clamping diode caused distortion in multilevel NPC Full-Bridge audio power amplifiers 

    Sala Caselles, Vicenç; Salehi Arashloo Arashloo, Ramin; Moreno Eguilaz, Juan Manuel; Salehifar, Mehdi; Romeral Martínez, José Luis (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents a study and analysis of the distorting effects of clamped diodes in multilevel DCI-NPC topology applied to high power and high quality audio-amplifier. The main distorting sources of error are characterized, ...
  • Closed-loop controller for eliminating the contact bounce in DC core contactors 

    García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Cusido Roura, Jordi; Ortega Redondo, Juan Antonio; Romeral Martínez, José Luis (2010-09)
    Article
    Accés obert
    The undesirable phenomenon of the contact bounce causes severe erosion of the contacts and, as a consequence, their electrical life and reliability are greatly reduced. On the other hand, the bounce of the armature can ...