Ara es mostren els items 58-77 de 81

    • High-frequency spread-spectrum modulations for wide-bandgap voltage source converters 

      Lumbreras Carrasco, David; Zaragoza Bertomeu, Jordi; Berbel Artal, Néstor; Mon González, Juan; Galvez Moreno, Eduardo; Collado Escolano, Alfonso (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The high efficiency and the electromagnetic com- patibility of wide-bandgap (WBG) power converters can be further improved using spread-spectrum (SS) modulations. This paper evaluates and compares the impact of SS techniques ...
    • Hybrid sensorless permanent magnet synchronous machine four quadrant drive based on direct matrix converter 

      Arias Pujol, Antoni; Ortega, Carlos; Zaragoza Bertomeu, Jordi; Espina, Jordi; Pou Félix, Josep (2013-02)
      Article
      Accés obert
      Permanent Magnet Synchronous Machines (PMSMs) have several advantages, such as high ef¿ciency and low volume and weight, which make them attractive for aerospace applications and high performance servo drives. Matrix ...
    • Mathematical efficiency modeling of static power converters 

      Hoff Dupont, Fabrício; Zaragoza Bertomeu, Jordi; Rech, Cassiano; Pinheiro, José Renes (2015)
      Text en actes de congrés
      Accés obert
      This paper presents a review and a comparative analysis between mathematical models for the efficiency of power converters. Two different types of models are considered, being one for converters subject solely for output ...
    • Modulation strategies for the neutral-point-clamped converter and control of a wind turbine system 

      Zaragoza Bertomeu, Jordi (Universitat Politècnica de Catalunya, 2011-11-25)
      Tesi
      Accés obert
      Els convertidors multinivell són topologies de convertidors d’electrònica de potència que poden generar tres o més nivells de voltatge en cadascuna de les fases de sortida. Com a resultat, els voltatges i corrents generats ...
    • Modulation strategy for multiphase neutral-point-clamped converters 

      López, Iraide; Ceballos Recio, Salvador; Pou Félix, Josep; Zaragoza Bertomeu, Jordi; Andreu, Jon; Kortabarria, Iñigo; Agelidis, Vassilios (2015-02-01)
      Article
      Accés obert
      This paper presents a novel modulation strategy for n-phase neutral-point-clamped (NPC) converters. The proposed modulation strategy is able to control and completely remove the low-frequency neutral-point (NP) voltage ...
    • Multiphase PMSM and PMaSynRM flux map model with space harmonics and multiple plane cross harmonic saturation 

      Michalski, Tomasz Dobromir; Acosta Cambranis, Fernando Geovany; Romeral Martínez, José Luis; Zaragoza Bertomeu, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés obert
      Multiphase Synchronous Machines vary in rotor construction and winding distribution leading to non-sinusoidal inductances along the rotor periphery. Moreover, saturation and cross-saturation effects make the precise modeling ...
    • New measuring technique for reducing the number of voltage sensors in modular multilevel converters 

      Picas Prat, Ricard; Zaragoza Bertomeu, Jordi; Pou Félix, Josep; Ceballos Recio, Salvador; Balcells Sendra, Josep (2016-01-01)
      Article
      Accés obert
      This paper presents a new technique for measuring the capacitor voltages in a modular multilevel converter using a reduced number of voltage sensors. With this technique, the minimum number of voltage sensors per arm is ...
    • New modulation strategy for five-phase high-frequency VSI based on sigma–delta modulators 

      Acosta Cambranis, Fernando Geovany; Zaragoza Bertomeu, Jordi; Romeral Martínez, José Luis; Berbel Artal, Néstor (Institute of Electrical and Electronics Engineers (IEEE), 2021-10-20)
      Article
      Accés restringit per política de l'editorial
      This article proposes a new modulation strategy for a five-phase high-frequency voltage source inverter (VSI) based on sigma–delta ( S¿ ) modulators. This modulation strategy of five-phase large–medium-zero vectors S¿ ...
    • Optimal injection of harmonics in circulating currents of modular multilevel converters for capacitor voltage ripple minimization 

      Picas Prat, Ricard; Pou Félix, Josep; Ceballos Recio, Salvador; Zaragoza Bertomeu, Jordi; Konstantinou, Georgios; Agelidis, Vassilios (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper proposes an algorithm to calculate the optimal amplitude and phase of the harmonic current components that can be injected in the circulating currents of a modular multilevel converter (MMC) to minimize the ...
    • Parallel-connected legs in a grid-tied inverter system for distributed generation 

      Capellá Frau, Gabriel José; Pou Félix, Josep; Zaragoza Bertomeu, Jordi; Ceballos Recio, Salvador; Gabiola, Igor; Robles Sestafe, Eider (2011)
      Comunicació de congrés
      Accés obert
      Grid-connected high-power inverters are often used in distributed generation and power quality systems. Those inverters have to handle high currents in order to achieve high power values without resorting to higher ...
    • Performance assessment of a wide-bandgap-semiconductor dual-active-rridge converter for electrical vehicles 

      Berbel Artal, Néstor; Capellá Frau, Gabriel José; Zaragoza Bertomeu, Jordi; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      Dc-dc converters can be found in different kinds of electric vehicles (EVs). Their main function is to accommodate voltages and currents to the motor or other EV systems requirements. The use of wide-bandgap (WBG) devices ...
    • Reliable modular multilevel converter fault detection with redundant voltage sensor 

      Picas Prat, Ricard; Zaragoza Bertomeu, Jordi; Pou Félix, Josep; Ceballos Recio, Salvador (2016-02-08)
      Article
      Accés obert
      This paper presents a fault-tolerant configuration for the modular multilevel converter (MMC). The procedure is able to detect faults in voltage sensors and semiconductor switching devices, and it can reconfigure the system ...
    • SISTEMES ELECTRÒNICS (Examen 2n quadrimestre, 1r parcial) 

      Zaragoza Bertomeu, Jordi (Universitat Politècnica de Catalunya, 2012-04-11)
      Examen
      Accés restringit a la comunitat UPC
    • SISTEMES ELECTRÒNICS (Examen 2n quadrimestre, 1r parcial) 

      Zaragoza Bertomeu, Jordi (Universitat Politècnica de Catalunya, 2011-04-13)
      Examen
      Accés restringit a la comunitat UPC
    • Study and comparison of discontinuous modulation for modular multilevel converters in motor drive applications 

      Picas Prat, Ricard; Zaragoza Bertomeu, Jordi; Pou Félix, Josep; Ceballos Recio, Salvador; Konstantinou, Georgios; Capellá Frau, Gabriel José (Institute of Electrical and Electronics Engineers (IEEE), 2019-01-01)
      Article
      Accés obert
      Discontinuous modulation applied to modular multilevel converters is an effective method for reducing the capacitor voltage ripples. In this paper, the discontinuous modulation is adapted and used in a motor drive application. ...
    • Study and experimental verification of control tuning strategies in a variable speed wind energy conversion system 

      Zaragoza Bertomeu, Jordi; Pou Félix, Josep; Arias Pujol, Antoni; Spiteri, Cyril; Robles Sestafe, Eider; Ceballos Recio, Salvador (2011-05)
      Article
      Accés restringit per política de l'editorial
      This paper analyzes and compares different control tuning strategies for a variable speed wind energy conversion system (WECS) based on a permanent-magnet synchronous generator (PMSG). The aerodynamics of the wind turbine ...
    • Study of modulation techniques applied to full bridge single-phase inverters based on wide-bandgap semiconductors 

      Ferrer Arnau, Luis Jorge; Berbel Artal, Néstor; Capellá Frau, Gabriel José; Zaragoza Bertomeu, Jordi (2019)
      Comunicació de congrés
      Accés obert
      Wide-band gap (WBG) devices are gradually replacing standard Si semiconductors in power converters. This is due to the fact that WBG devices exhibit lower capacitance and on-resistance and besides, as they can switch at ...
    • Submodule power losses balancing algorithms for the modular multilevel converter 

      Picas Prat, Ricard; Pou, Josep; Zaragoza Bertomeu, Jordi; Watson, Alan; Konstantinou, Georgios; Ceballos Recio, Salvador; Clare, John (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      Tolerance and component aging can cause significant differences in the capacitance values of the submodules (SMs) in a modular multilevel converter (MMC). Depending on the modulation technique, capacitance mismatches may ...
    • Teoria de circuits 

      Berbel Artal, Néstor; Zaragoza Bertomeu, Jordi (Universitat Politècnica de Catalunya, 2023-12-14)
      Apunts
      Accés obert
    • Training kit for power electronics teaching 

      Pérez Robles, Daniel; Balcells Sendra, Josep; Lamich Arocas, Manuel; Berbel Artal, Néstor; Zaragoza Bertomeu, Jordi; Mon González, Juan (Institute of Electrical and Electronics Engineers (IEEE), 2008)
      Text en actes de congrés
      Accés restringit per política de l'editorial