Now showing items 1-20 of 23

  • A text-mining approach to assess the failure condition of wind turbines using maintenance service history 

    Blanco Martínez, Alejandro; Marti Puig, Pere; Gibert, Karina; Cusidó Roura, Jordi; Sole Casals, Jordi (2019-05-23)
    Article
    Open Access
    Detecting and determining which systems or subsystems of a wind turbine have more failures is essential to improve their design, which will reduce the costs of generating wind power. Two of the most critical failures, the ...
  • Bearings fault detection using inference tools 

    Delgado Prieto, Miquel; Cusidó Roura, Jordi; Romeral Martínez, José Luis (In-Tech, 2011-09)
    Part of book or chapter of book
    Open Access
    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 ...
  • Closed-loop controller for eliminating the contact bounce in DC core contactors 

    García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Cusidó Roura, Jordi; Ortega Redondo, Juan Antonio; Romeral Martínez, José Luis (2010-09)
    Article
    Open Access
    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 ...
  • Condition monitoring system for characterization of electric motor ball bearings with distributed fault using fuzzy inference tools 

    Navarro, L.; Delgado Prieto, Miquel; Urresty Betancourt, Julio César; Cusidó Roura, Jordi; Romeral Martínez, José Luis (2010-05-06)
    Article
    Open Access
    The present work shows a condition monitoring system applied to electric motors ball bearings. Unlike most of the previous work on this area, which is mainly focused on the location of single-point defects in bearing ...
  • Cursp práctico de microprocesadores con metodología semipresencial 

    Ortega Redondo, Juan Antonio; Romeral Martínez, José Luis; Thomaschewski, J; García Espinosa, Antonio; Cusidó Roura, Jordi; Mon González, Juan (Universitat Politècnica de Catalunya, 2004)
    Conference report
    Open Access
    El objetivo final de esta experiencia es mejorar la docencia impartida por el Departamento de Ingeniería Electrónica en el Campus de Terrassa de la UPC en el área de microprocesadores. La mejora tiene dos ejes fundamentales, ...
  • Demagnetization diagnosis in permanent magnet synchronous motors under non-stationary speed conditions 

    Riba Ruiz, Jordi-Roger; García Espinosa, Antonio; Romeral Martínez, José Luis; Cusidó Roura, Jordi (2010-10)
    Article
    Restricted access - publisher's policy
    Permanent magnet synchronous motors (PMSMs) are applied in high performance positioning and variable speed applications because of their enhanced features with respect to other AC motor types. Fault detection and diagnosis ...
  • Diagnosis method for suspension-errors detection in electro-dynamic loud-speakers 

    Sala Caselles, Vicenç; Delgado Prieto, Miquel; Cusidó Roura, Jordi; Romeral Martínez, José Luis (2011)
    Conference report
    Restricted access - publisher's policy
    In this paper, the wear of the suspensions in a speaker. This phenomenon can be characterized and seen as a variation of half inductance seen from the amplifier, because that value depends directly on the minimum and ...
  • Dynamic evaluation of fringing flux in linear electromechanical devices 

    García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Cusidó Roura, Jordi; Romeral Martínez, José Luis; Ortega Redondo, Juan Antonio (2010-03-12)
    Article
    Restricted access - publisher's policy
    Accurate dynamic models of electromechanical devices are essential in order to develop effective motion control strategies of such devices. The effects of fringing flux can not be ignored when dealing with electromagn ...
  • EMA fault detection using fuzzy inference tools 

    Cusidó Roura, Jordi; Delgado Prieto, Miquel; Romeral Martínez, José Luis (2012-03-02)
    Part of book or chapter of book
    Open Access
    Acoustic emission (AE) is one of the most important non-destructive testing (NDT) methods for materials, constructions and machines. Acoustic emission is defined as the transient elastic energy that is spontaneously released ...
  • Estudio de microgrids con interfases de convertidores de DC/AC 

    Andrade Rengifo, Fabio; Kampouropoulos, Konstantinos; Cusidó Roura, Jordi; Romeral Martínez, José Luis (2011)
    Conference report
    Open Access
    Este artículo presenta un estudio de Microgrids con interfases de convertidores DC/AC. El artículo muestra los modos de operación de las Microgrids, además implementa un modelo de pequeña señal para el modo de operación ...
  • Fault detection by means of Hilbert-Huang transform of the stator current in a PMSM with demagnetization 

    García Espinosa, Antonio; Rosero García, Javier Alveiro; Cusidó Roura, Jordi; Romeral Martínez, José Luis; Ortega Redondo, Juan Antonio (2010-06)
    Article
    Open Access
    This paper presents a novel method to diagnose demagnetization in permanent-magnet synchronousmotor (PMSM). Simulations have been performed by 2-D finite-element analysis in order to determine the current spectrum and ...
  • Identifying health status of wind turbines by using self organizing maps and interpretation-oriented post-processing tools 

    Blanco, Alejandro; Gibert, Karina; Marti Puig, Pere; Cusidó Roura, Jordi; Sole Casals, Jordi (2018-04-01)
    Article
    Open Access
    Identifying the health status of wind turbines becomes critical to reduce the impact of failures on generation costs (between 25–35%). This is a time-consuming task since a human expert has to explore turbines individually. ...
  • Motor fault detection using a Rogowski sensor without an integrator 

    Poncelas, O; Rosero García, Javier Alveiro; Cusidó Roura, Jordi; Ortega Redondo, Juan Antonio; Romeral Martínez, José Luis (2009-10)
    Article
    Open Access
    This paper presents a new approach for the current acquisition system in motor fault detection applications. This paper includes the study, design, and implementation of a Rogowski coil current sensor without the integrator ...
  • New mathematical model of an inverter-based generator for stability studies of microgrid Systems 

    Andrade Rengifo, Fabio; Romeral Martínez, José Luis; Kampouropoulos, Konstantinos; Cusidó Roura, Jordi (2013)
    Conference report
    Open Access
    A new mathematical model of a renewable generator, with a DC-AC interface, based on the concept of electrostatic machine is presented. This new model has a direct relationship between the DC and AC side. Moreover, it can ...
  • New model of a converter-based generator using electrostatic synchronous machine concept 

    Andrade Rengifo, Fabio; Romeral Martínez, José Luis; Cusidó Roura, Jordi; Cárdenas Araújo, Juan José (2014-06-01)
    Article
    Restricted access - publisher's policy
    In this paper, a new method for modeling converter-based power generators in ac-distributed systems is proposed. It is based on the concept of electrostatic synchronous machines. With this new concept, it is possible to ...
  • On-line fault detection method for induction machines based on signal convolution 

    Cusidó Roura, Jordi; Romeral Martínez, José Luis; García Espinosa, Antonio; Ortega Redondo, Juan Antonio; Riba Ruiz, Jordi-Roger (2010-06-28)
    Article
    Open Access
    A new technique for induction motor fault detection and diagnosis is presented. This technique, which has been experimentally verified in stationary and non-stationary motor conditions, is based on the convolution of ...
  • Protecció de la innovació tecnològica 

    Albiol Rodríguez, Jordi; Cusidó Roura, Jordi (Generalitat de Catalunya. CIDEM, 2009-09)
    Part of book or chapter of book
    Open Access
  • Recycling of sludge from drinking water treatment as ceramic material for the manufacture of tiles 

    Cremades Oliver, Lázaro Vicente; Cusidó Roura, Jordi; Arteaga, F. (2018-08-14)
    Article
    Restricted access - publisher's policy
    Currently, the main destination for sludge from Drinking Water Treatment Plants (DWTP) is its disposal in sanitary landfills. However, its chemical composition and physical properties make it suitable for use as a building ...
  • Signal injection as a fault detection technique 

    Cusidó Roura, Jordi; Romeral Martínez, José Luis; Ortega Redondo, Juan Antonio; García Espinosa, Antonio; Riba Ruiz, Jordi-Roger (2011-03)
    Article
    Open Access
    Double frequency tests are used for evaluating stator windings and analyzing the temperature. Likewise, signal injection on induction machines is used on sensorless motor control fields to find out the rotor position. ...
  • Stability analysis of a microgrid system based on inverter-interfaced distributed generators 

    Andrade Rengifo, Fabio; Kampouropoulos, Konstantinos; Cusidó Roura, Jordi; Romeral Martínez, José Luis (2013)
    Article
    Restricted access - publisher's policy
    This paper presents a phase-plane trajectory analysis and the appliance of Lyapunov´s methodology to evaluate the stability limits of a small signal model of a Microgrid system. The work done is based on a non-linear tool ...