Ara es mostren els items 45-64 de 200

    • 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
      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 ...
    • Common-mode voltage mitigation strategies using sigma-delta modulation in five-phase VSIs 

      Acosta Cambranis, Fernando Geovany; Zaragoza Bertomeu, Jordi; Berbel Artal, Néstor; Capellá Frau, Gabriel José; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2022-10)
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      Accés obert
      Various sigma–delta ( S ¿ ) modulation techniques for reducing the maximum peak-to-peak amplitude of common-mode voltage (CMV) by 80% in a five-phase, high-frequency voltage source inverter (VSI) are proposed and evaluated ...
    • Comparative analysis of SVM techniques for a five-phase VSI based on SiC devices 

      Acosta Cambranis, Fernando Geovany; Zaragoza Bertomeu, Jordi; Romeral Martínez, José Luis; Berbel Artal, Néstor (2020-12-14)
      Article
      Accés obert
      Multiphase systems provides benefits compared to three-phase systems, such as improved torque per ampere, high power density, better fault tolerance, lower current per phase (due to power-splitting among a higher number ...
    • Computationally efficient design and optimization approach of PMa-SynRM in frequent operating torque-speed range 

      López Torres, Carlos; García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Lux, Gerhard; Romeral Martínez, José Luis (2018-04-30)
      Article
      Accés restringit per política de l'editorial
      This paper proposes a design process of permanent magnet assisted synchronous reluctance motors (PMa-SynRM) intended for vehicular propulsion. This approach takes into account range optimization and a multiphysics evaluation ...
    • 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
      Accés obert
      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 ...
    • Constant common-mode voltage strategies using sigma-delta modulators in five-phase VSI 

      Acosta Cambranis, Fernando Geovany; Zaragoza Bertomeu, Jordi; Berbel Artal, Néstor; Capellá Frau, Gabriel José; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2023-03)
      Article
      Accés obert
      This paper proposes and studies different sigma-delta () modulation strategies for obtaining a constant common-mode voltage (CMV) by eliminating the CMV level transitions in a five-phase voltage source inverter (VSI). These ...
    • Constrained-size torque maximization in SynRM machines by means of genetic algorithms 

      López Torres, Carlos; Sala Cardoso, Enric; García Espinosa, Antonio; Romeral Martínez, José Luis (2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Synchronous Reluctance Motors have always been an alternative to more mainstream machines such as the Permanent Magnet Synchronous Motor, but until recently they have not found their right place in industrial applications. ...
    • Control and modulation techniques applied to converters with impedances networks for traction systems 

      Fernández Palomeque, Efrén Esteban; Romeral Martínez, José Luis; Sala Caselles, Vicenç; Paredes Camacho, Alejandro (2017-01-20)
      Article
      Accés obert
      The development of different topologies of power converters with impedance networks have opened up new lines of research, its application in different areas such as transmission systems, high voltage, photovoltaic ...
    • Control method of impedance network in SiC power converters for HEV/EV 

      Fernández Palomeque, Efrén Esteban; Paredes, Alejandro; Sala, Vicent; Romeral Martínez, José Luis (Las Palmas : European Association of the Development of Renewable Energy, Environment and Power Quality, 2017)
      Text en actes de congrés
      Accés obert
      Silicon carbide (SiC) devices provide significant performance improvements in many aspects, including lower power dissipation, higher operating temperatures, and faster switching, compared to ...
    • Curso 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)
      Text en actes de congrés
      Accés obert
      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, ...
    • Defect reconstruction by non-destructive testing with laser induced ultrasonic detection 

      Mohamed Selim, Hossameldin; Delgado Prieto, Miquel; Trull Silvestre, José Francisco; Pico Vila, Rubén; Romeral Martínez, José Luis; Cojocaru, Crina (2020-02)
      Article
      Accés obert
      This work envisages a detailed study of two-dimensional defect localization and reconstruction, using laser generated ultrasound and its application as a remotely controlled non-destructive testing method. As an alternative ...
    • 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
      Accés restringit per política de l'editorial
      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 ...
    • Design and optimization for vehicle driving cycle of rare-earth-free SynRM based on coupled lumped thermal and magnetic networks 

      López Torres, Carlos; García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Romeral Martínez, José Luis (2018-01-01)
      Article
      Accés restringit per política de l'editorial
      This work presents a range optimization of a SynRM (synchronous reluctance motor) and a PMaSynRM (permanent-magnet-assisted synchronous reluctance motor) according to a standard driving cycle, and the solutions obtained ...
    • Detection of demagnetization faults in surface-mounted permanent magnet synchronous motors by means of the zero-sequence voltage component 

      Urresty Betancourt, Julio César; Riba Ruiz, Jordi-Roger; Delgado Prieto, Miquel; Romeral Martínez, José Luis (2012-03-01)
      Article
      Accés restringit per política de l'editorial
      This paper develops and analyzes an online methodology to detect demagnetization faults in surface-mounted permanent magnet synchronous motors. The proposed methodology, which takes into account the effect of the inverter ...
    • Detection of eccentricity faults in five-phase ferrite-PM assisted synchronous reluctance machines 

      López Torres, Carlos; Riba Ruiz, Jordi-Roger; García Espinosa, Antonio; Romeral Martínez, José Luis (Multidisciplinary Digital Publishing Institute, 2017-05-31)
      Article
      Accés obert
      Air gap eccentricity faults in five-phase ferrite-assisted synchronous reluctance motors (fPMa-SynRMs) tend to distort the magnetic flux in the air gap, which in turn affects the spectral content of both the stator currents ...
    • Detection of inter-turn faults in five-phase permanent magnet synchronous motors 

      Saavedra Ordóñez, Harold; Riba Ruiz, Jordi-Roger; Romeral Martínez, José Luis (2014-11-27)
      Article
      Accés obert
      Five-phase permanent magnet synchronous motors (PMSMs) have inherent fault-tolerant capabilities. This paper analyzes the detection of inter-turn short circuit faults in five-phase PMSMs in their early stage, i.e. with ...
    • Detection of inter-turns short circuits in permanent magnet synchronous motors operating under transient conditions by means of the zero sequence voltage 

      Urresty Betancourt, Julio César; Riba Ruiz, Jordi-Roger; Saavedra Ordóñez, Harold; Romeral Martínez, José Luis (2011)
      Text en actes de congrés
      Accés obert
      This work proposes the zero sequence voltage component (ZSVC) of the stator three-phase voltages as a method for detecting winding inter-turns short circuits in permanent magnet synchronous motors PMSM operating under ...
    • Detection of interturn faults in PMSMs with different winding configuration 

      Saavedra Ordóñez, Harold; Urresty Betancourt, Julio César; Riba Ruiz, Jordi-Roger; Romeral Martínez, José Luis (2014-03-03)
      Article
      Accés restringit per política de l'editorial
      Interturn faults in permanent magnet synchronous motors (PMSMs) may develop fast into more severe faults such as coil-to-coil, phase-to-phase and phase-to-ground short circuits. These faults are very destructive and may ...
    • Detection of partial demagnetization fault in PMSMs operating under nonstationary conditions 

      Wang, Chao; Delgado Prieto, Miquel; Romeral Martínez, José Luis; Chen, Zhe; Blaabjerg, Frede; Liu, Xiaoyan (2016-07-01)
      Article
      Accés obert
      Demagnetization fault detection of in-service permanent magnet synchronous machines (PMSMs) is a challenging task, because most PMSMs operate under nonstationary circumstances in industrial applications. A novel approach ...
    • Development of a behavior maps tool to evaluate drive operational boundaries and optimization assessment of PMa-SynRMs 

      López Torres, Carlos; Colls Castro, Carles; García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2018-04-05)
      Article
      Accés obert
      The trend in traction motor design and optimization is to achieve high torque and power densities, wider speed range and high efficiency within the area defining the most frequent operating points. A fast tool to evaluate ...