Now showing items 21-40 of 129

  • Analysis of power converters with devices of SiC for applications in electric traction systems 

    Fernández Palomeque, Efrén Esteban; Paredes, Alejandro; Romeral Martínez, José Luis; Sala, Vicent (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    This article presents the analysis of two topologies of power converters. Voltage Source Inverter (VSI) and Current Source Inverter (CSI) proposals for traction system applications, these topologies are implemented with ...
  • An energy prediction method using adaptive Neuro-Fuzzy Inference System and Genetic Algorithms 

    Kampouropoulos, Konstantinos; Cárdenas Araújo, Juan José; Giacometto Torres, Francisco; Romeral Martínez, José Luis (2013)
    Conference report
    Restricted access - publisher's policy
    This document presents an energy forecast methodology using Adaptive Neuro-Fuzzy Inference System (ANFIS) and Genetic Algorithms (GA). The GA has been used for the selection of the training inputs of the ANFIS in order to ...
  • An introduction to fault diagnosis of permanent magnet synchronous machines in master's degree courses 

    Riba Ruiz, Jordi-Roger; García Espinosa, Antonio; Romeral Martínez, José Luis; Ortega Redondo, Juan Antonio (John Wiley & Sons, 2010-08-16)
    Article
    Restricted access - publisher's policy
    Early fault detection and diagnosis of high-performance electric motors has been an active area of research for the past two decades. This work presents a practical session that facilitates instructing students in this ...
  • 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 novel broken rotor bar fault detection method using park’s transform and wavelet decomposition 

    Salehi Arashloo Arashloo, Ramin; Romeral Martínez, José Luis; Salehifar, Mehdi (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference lecture
    Restricted access - publisher's policy
    Detection of broken rotor bars has been an important but difficult work in fault diagnosis area of induction motors. The characteristic frequency components of faulted rotor are very close to the power frequency component ...
  • A parallel analytical computation of synchronous reluctance machine 

    López Torres, Carlos; Bacco, G.; Bianchi, N.; Espinosa, Alberto; Romeral Martínez, José Luis (2018)
    Conference report
    Restricted access - publisher's policy
    This paper presents a parallel analytical computation of synchronous reluctance machines. It is based on two different analytical models, which take into account the geometry, the winding configuration and the material ...
  • Application of the zero-sequence voltage component to detect stator winding inter-turn faults in PMSMs 

    Urresty Betancourt, Julio César; Riba Ruiz, Jordi-Roger; Romeral Martínez, José Luis (2012-08)
    Article
    Restricted access - publisher's policy
    This paper develops and analyzes a methodology for detecting stator winding inter-turn faults in surface-mounted permanent magnet synchronous motors. The proposed methodology is based on monitoring the zero-sequence voltage ...
  • 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 ...
  • 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 ...
  • 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, ...
  • 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 ...
  • 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
    Restricted access - publisher's policy
    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
    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 ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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
    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 ...
  • 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)
    Conference report
    Open Access
    Silicon carbide (SiC) devices provide significant performance improvements in many aspects, including lower power dissipation, higher operating temperatures, and faster switching, compared to ...