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Ara es mostren els items 1-20 de 81

    • A carrier-based PWM strategy with zero-sequence voltage injection for a three-level neutral-point-clamped converter 

      Pou Félix, Josep; Zaragoza Bertomeu, Jordi; Ceballos Recio, Salvador; Saeedifard, Maryam; Boroyevich, Dushan (Institute of Electrical and Electronics Engineers (IEEE), 2012-01-09)
      Article
      Accés restringit per política de l'editorial
      Performance of a carrier-based pulsewidth modulation (CB-PWM) strategy can be improved by the inclusion of a zero-sequence voltage in the modulation-reference signal. This paper proposes a new CB-PWM strategy for a three-level ...

    • A comprehensive analysis of SVPWM for a Five-phase VSI based on SiC devices applied to motor drives 

      Acosta Cambranis, Fernando Geovany; Zaragoza Bertomeu, Jordi; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2019)
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      This paper presents a comprehensive analysis of SVPWM for a five-phase VSI based on SiC devices applied to motor drives. The modulation techniques analyzed use medium and large vectors to reach the reference vector. The ...

    • A new method to improve the total efficiency of parallel converters 

      Hoff Dupont, Fabrício; Zaragoza Bertomeu, Jordi; Rech, Cassiano; Pinheiro, José Renes (2013)
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      This paper proposes a new methodology for efficiency optimization in systems composed by parallel converters. The proposed methodology takes into account the individual efficiency curves and determines the optimum ...

    • A novel three-dimensional sigma–delta modulation for high-switching-frequency three-phase four-wire active power filters 

      Lumbreras Carrasco, David; Zaragoza Bertomeu, Jordi; Lamich Arocas, Manuel; Berbel Artal, Néstor; Romero Cadaval, Enrique (2024-02-01)
      Article
      Accés obert
      This article presents a new modulation technique called three-dimensional sigma–delta (3D-S¿ ) modulation for high-frequency three-leg four-wire voltage source converters (VSCs) that use wide-bandgap (WBG) semiconductors. ...

    • A simple control strategy to increase the total efficiency of multi-converter systems 

      Hoff Dupont, Fabrício; Zaragoza Bertomeu, Jordi; Rech, Cassiano; Pinheiro, José Renes (2013)
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      This paper presents a simple control strategy that is employed together with an optimization methodology to achieve optimal efficiency in systems composed by multiple parallel converters. An external loop is responsible ...

    • A Versatile workbench simulator: Five-phase inverter and PMa-SynRM performance evaluation 

      Acosta Cambranis, Fernando Geovany; Zaragoza Bertomeu, Jordi; Romeral Martínez, José Luis; Michalski, Tomasz Dobromir; Pou Muñoz, Viàtor (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
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      Thispaperpresents the design and structure of aversatileworkbench simulator forevaluating the performance of a five-phase inverter andPermanent Magnet assisted Synchronous Reluctance Motor(PMa-SynRM). The simulatorallows ...

    • Apunts d'electrònica analògica 

      Zaragoza Bertomeu, Jordi; Berbel Artal, Néstor (Universitat Politècnica de Catalunya, 2016)
      Apunts
      Accés obert

    • Circulating current injection methods based on instantaneous information for the modular multilevel converter 

      Pou Félix, Josep; Ceballos Recio, Salvador; Konstantinou, Georgios; Agelidis, Vassilios; Picas Prat, Ricard; Zaragoza Bertomeu, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2015-02-01)
      Article
      Accés obert
      This paper studies different circulating current references for the modular multilevel converter. The circulating current references are obtained from the instantaneous values of the output current and modulation signal ...

    • Closed-Loop discontinuous modulation technique for capacitor voltage ripples and switching losses reduction in modular multilevel converters 

      Picas Prat, Ricard; Ceballos Recio, Salvador; Pou Félix, Josep; Zaragoza Bertomeu, Jordi; Konstantinou, Georgios; Agelidis, Vassilios (2015-04-15)
      Article
      Accés obert

    • Common-mode voltage elimination in multilevel power inverter-based motor drive applications 

      Robles, Endika; Fernandez, Markel; Zaragoza Bertomeu, Jordi; Aretxabaleta, Iker; de Alegria, Iñigo Martinez; Andreu Larrañaga, Jon (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Article
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      The industry and academia are focusing their efforts on finding more efficient and reliable electrical machines and motor drives. However, many of the motors driven by pulse-width modulated converters face the recurring ...

    • Common-mode voltage mitigation in multiphase electric motor drive systems 

      Robles, Endika; Fernandez, Markel; Andreu Larrañaga, Jon; Ibarra Basabe, Edorta; Zaragoza Bertomeu, Jordi; Ugalde, Unai (2022-04)
      Article
      Accés obert
      Common-mode voltage (CMV) produces serious reliability and electromagnetic interference (EMI) issues in modern pulse-width modulated (PWM) electric drives. Such issues will become more prominent in the near future, as ...

    • 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)
      Article
      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 ...

    • Comprehensive analysis of hexagonal sigma-delta modulations for three-phase high-frequency VSC based on wide-bandgap semiconductors 

      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), 2021-06)
      Article
      Accés obert
      The efficiency of wide-bandgap (WBG) power converters can be greatly improved using high-frequency modulation techniques. This article proposes using single-loop and double-loop hexagonal sigma-delta (H-S¿ and DH-S¿, ...

    • 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 ...

    • CONTROL I AUTOMATITZACIÓ INDUSTRIAL (Examen 2n quadrimestre, 2n parcial) 

      Berbel Artal, Néstor; Medina Garcia, José Luis; Solà de las Fuentes, Glòria; Zaragoza Bertomeu, Jordi (Universitat Politècnica de Catalunya, 2011-06-10)
      Examen
      Accés restringit a la comunitat UPC

    • Control of Circulating Currents in Modular Multilevel Converters Through Redundant Voltage Levels 

      Konstantinou, Georgios; Pou Félix, Josep; Ceballos Recio, Salvador; Picas Prat, Ricard; Zaragoza Bertomeu, Jordi; Agelidis, Vassilios (2016-11-01)
      Article
      Accés obert
      Among the main control targets in a modular multilevel converter (MMC) is the control of the circulating currents within the phase legs of the topology. This paper presents a controller for the circulating current of the ...

    • Current balancing strategy in parallel-connected legs of power inverters 

      Pou Félix, Josep; Zaragoza Bertomeu, Jordi; Capellá Frau, Gabriel José; Gabiola, Igor; Salvador, Ceballos; Robles Sestafe, Eider (EPE Association, 2009-10-31)
      Comunicació de congrés
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      The parallel connection of inverter legs is a way to increase the output currents and thus the converter rated power. The connection is made by inductors and a critical issue is to achieve balanced currents among the legs. ...

    • Current-balancing technique for interleaved voltage source inverters with magnetically coupled legs connected in parallel 

      Capellá Frau, Gabriel José; Pou Félix, Josep; Ceballos Recio, Salvador; Zaragoza Bertomeu, Jordi; Agelidis, Vassilios (Institute of Electrical and Electronics Engineers (IEEE), 2015-03-01)
      Article
      Accés obert
      Connecting legs in parallel in a voltage source inverter is a way to increase the output current and, thus, its rated power. The connection can be made using either coupled or uncoupled inductors, and achieving an even ...

    • Discontinuous modulation of modular multilevel converters without the need for extra submodules 

      Picas Prat, Ricard; Ceballos Recio, Salvador; Pou Félix, Josep; Zaragoza Bertomeu, Jordi; Konstantinou, Georgios; Agelidis, Vassilios; Balcells Sendra, Josep (2015)
      Text en actes de congrés
      Accés obert