Now showing items 1-20 of 29

  • 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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • 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)
    Conference report
    Open Access
    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 ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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 active gate driver for improving SiC MOSFET switching trajectory 

    Paredes Camacho, Alejandro; Sala Caselles, Vicenç; Ghorbani, Hamidreza; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2017-11-01)
    Article
    Open Access
    The trend in power electronic applications is to reach higher power density and higher efficiency. Currently, the wide band-gap devices such as silicon carbide MOSFET (SiC MOSFET) are of great interest because they can ...
  • 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)
    Conference lecture
    Restricted access - publisher's policy
    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 ...
  • A Simple Closed-Loop Active Gate Voltage Driver for Controlling diC/dt and dvCE/dt in IGBTs 

    Ghorbani, Hamidreza; Sala Caselles, Vicenç; Paredes Camacho, Alejandro; Romeral Martínez, José Luis (2019-01-30)
    Article
    Open Access
    The increase of the switching speed in power semiconductors leads to converters with better efficiency and high power density. On the other hand, fast switching generates some consequences like overshoots and higher switching ...
  • A simple gate drive for SiC MOSFET with switching transient improvement 

    Ghorbani, Hamidreza; Sala Caselles, Vicenç; Paredes Camacho, Alejandro; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Restricted access - publisher's policy
    This paper presents a new active gate drive for SiC MOSFETs switching. The proposed driver is based on feedforward control method. The switch is benefited from a simple and effective analog gate driver (GD). The main ...
  • A simple method for reducing THD and improving the efficiency in CSI topology based on SiC power devices 

    Fernández Palomeque, Efrén Esteban; Paredes, Alejandro; Sala Caselles, Vicenç; Romeral Martínez, José Luis; Sala, Vicent; Paredes, Alejandro (2018-10-17)
    Article
    Open Access
    Silicon carbide (SiC)-based switching devices provide significant performance improvements in many aspects, including lower power dissipation, higher operating temperatures, and faster switching; compared with conventional ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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, ...
  • 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
    Open Access
    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 ...
  • 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 ...
  • Disseny òptim d'amplificadors d'audio commutats DCI-NPC d'alta potència i qualitat 

    Sala Caselles, Vicenç (Universitat Politècnica de Catalunya, 2014-12-12)
    Doctoral thesis
    Open Access
    Class-D Amplification has been an absolute improvement in terms of electrical efficiency in audio amplification systems, but it has been during the first stabilization decade of this technology in the market when manufacturers ...
  • Evaluation of trr distorting effects reduction in DCI-NPC multilevel power amplifiers by using SiC diodes and MOSFET technologies 

    Sala Caselles, Vicenç; Resano, Tomas; Romeral Martínez, José Luis; Moreno Eguilaz, Juan Manuel (Curran, 2013)
    Conference report
    Restricted access - publisher's policy
    In the last decade, the Power Amplifier applications have used multilevel diode-clamped-inverter or neutral-point-clamped (DCI-NPC) topologies to present very low distortion at high power. In these applications a lot of ...
  • Fault tolerant operation of a five phase converter for PMSM drives 

    Salehifar, Mehdi; Salehi Arashloo Arashloo, Ramin; Moreno Eguilaz, Juan Manuel; Sala Caselles, Vicenç; Romeral Martínez, José Luis (2013)
    Conference report
    Restricted access - publisher's policy
    In this paper a five phase fault tolerant converter is proposed for permanent magnet (PM) drives. The proposed configuration is an extension of conventional three phase double switch redundant topologies. In contrast to ...
  • Impact of neutral point current control on copper loss distribution of five phase PM generators used in wind power plants 

    Salehi Arashloo Arashloo, Ramin; Romeral Martínez, José Luis; Salehifar, Mehdi; Sala Caselles, Vicenç (2014)
    Article
    Open Access
    Efficiency improvement under faulty conditions is one of the main objectives of fault tolerant PM drives. This goal can be achieved by increasing the output power while reducing the losses. Stator copper loss not only ...
  • Impedance networks and its application in power for electric traction systems 

    Fernández Palomeque, Efrén Esteban; Romeral Martínez, José Luis; Sala Caselles, Vicenç (2016-04-26)
    Article
    Open Access
    The use of impedance networks in different types of DC/DC, DC/AC and AC/AC converters, has increased significantly, and many converters topologies and articles VSI and CSI with impedance networks have been presented for ...
  • Improved open switch fault detection based on normalized current analysis in multiphase fault tolerant converters 

    Salehifar, Mehdi; Moreno Eguilaz, Juan Manuel; Sala Caselles, Vicenç; Salehi Arashloo Arashloo, Ramin; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference lecture
    Restricted access - publisher's policy
    A new open switch fault detection method based on normalized current analysis is proposed for application in multiphase fault tolerant PMSM drives. Performance characteristics of proposed method are single diagnostic ...
  • Loudspeaker Rub Fault Detection by Means of a New Nonstationary Procedure Test 

    Ruiz Illana, Germán; Sala Caselles, Vicenç; Delgado Prieto, Miquel; Ortega Redondo, Juan Antonio (2011)
    Conference report
    Restricted access - publisher's policy
    This paper addresses rub defect loudspeaker detection. The study includes a simulation with a rub model based on classical static coulomb friction added to the loudspeaker nonlinearities parametric model to demonstrate ...
  • Method to reduce THD and improve efficiency in SiC power converter. 

    Fernández Palomeque, Efrén Esteban; Paredes Camacho, Alejandro; Sala Caselles, Vicenç; Romeral Martínez, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    This paper presents a method to reduce total harmonic distortion (THD) and improve efficiency of a topology of power converter using SiC devices. The method consists of two parts: the first part finds the optimum offset ...
  • Millora de material docent en l'àmbit de l'electrònica de potència a l'EUETIT i l'EPSEM adaptat als crèdits ECTS. 

    Jaen Fernandez, Carles; Martínez Teixidor, Inmaculada; Pano Ferrer, Olga; Pou Félix, Josep; Sala Caselles, Vicenç; Vicente Rodrigo, Jesús; Pérez, Daniel; Salvador, Antoni; Pineda, Joan Carles; Roca Lefler, Marta; Mas, Andreu; Ojalvo, Pedro; Bacardit, Roger; Planas, Montserrat (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2010-02-11)
    Conference lecture / Conference report
    Open Access
    El projecte “Millora de material docent en l'àmbit de l'electrònica de potència a l'EUETIT i l'EPSEM adaptat als crèdits ECTS” te com a finalitat la millora de la formació i rendiment acadèmic dels estudiants tenint present ...