Now showing items 21-40 of 107

  • Comparative Study of Multivariate Methods to Identify Paper Finishes Using Infrared Spectroscopy 

    Riba Ruiz, Jordi-Roger; Canals Parelló, Trini; Cantero Gómez, María Rosa (2012-03-09)
    Article
    Open Access
    Recycled paper is extensively used worldwide. In the last decades its market has expanded considerably. The increasing use of recycled paper in papermaking has led to the production of paper containing several types of ...
  • Composition determination of rubber blends by applying differential scanning calorimetry and SPA-PLS treatment 

    Riba Ruiz, Jordi-Roger; Mansilla, Marcela Ángela; Canals, Trini; Cantero, Rosa (2019-01-07)
    Article
    Open Access
    This paper proposes an innovative approach to determine the composition of natural rubber (NR) and styrene butadiene rubber (SBR) blends from the analysis of the data provided by the differential scanning calorimetry (DSC) ...
  • 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 ...
  • DC-DC buck converter parameter identification based on a white-box approach 

    Balakrishnan, Hariharan; Moreno Eguilaz, Juan Manuel; Riba Ruiz, Jordi-Roger; Bogarra Rodríguez, Santiago; García Espinosa, Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
    Open Access
    This paper proposes to use a white-box approach to identify the parameters of an electronic DC-DC buck converter. It discretizes the differential equations governing the dynamic of such system, which are used to identify ...
  • 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
    Restricted access - publisher's policy
    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 (2017-08-11)
    Article
    Restricted access - publisher's policy
    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 ...
  • Detailed off-line parameter identification of synchronous generator based on frequency response tests 

    Bogarra Rodríguez, Santiago; García Espinosa, Antonio; Moreno Eguilaz, Juan Manuel; Riba Ruiz, Jordi-Roger (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
    Open Access
    This work presents a general methodology, based on standstill frequency response tests. Once the circuit topology is chosen, it allows a systematic calculation of the circuit parameters for a salient pole synchronous ...
  • 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
    Restricted access - publisher's policy
    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
    Open Access
    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
    Open Access
    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 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
    Restricted access - publisher's policy
    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 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)
    Conference report
    Open Access
    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 ...
  • Determination of the recovered-fiber content in paperboard samples by applying mid-infrared spectroscopy 

    Riba Ruiz, Jordi-Roger; Canals Parelló, Trini; Cantero Gómez, María Rosa (2015-04-01)
    Article
    Open Access
    Paperboard is widely used in different applications, such as packaging and graphic printing, among others. Consumption of recycled paper is growing, which has led the paper-mill packaging industry to apply strict quality ...
  • 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
    Open Access
    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 ...
  • Dielectric response of vulcanized natural rubber containing BaTiO3 filler: the role of particle functionalization 

    González Gómez, Neudys; Custal, Maria del Àngels; Tomara, Georgia N.; Psarras, Georgios C.; Riba Ruiz, Jordi-Roger; Armelín Diggroc, Elaine Aparecida (2017-12)
    Article
    Restricted access - publisher's policy
    Natural rubber (NR) nanocomposites have been prepared with hydroxylated barium titanate filler (BaTiO3-OH), employing emulsion polymerization followed by vulcanization process. The addition of barium titanate, a compound ...
  • Drug effect on EEG connectivity assessed by linear and nonlinear couplings 

    Alonso López, Joan Francesc; Mañanas Villanueva, Miguel Ángel; Romero Lafuente, Sergio; Hoyer, Dirk; Riba Ruiz, Jordi-Roger; Barbanoj, Manel J. (2010-03)
    Article
    Restricted access - publisher's policy
    Quantitative analysis of human electroencephalogram (EEG) is a valuable method for evaluating psychopharmacological agents. Although the effects of different drug classes on EEG spectra are already known, interactions ...
  • Dynamic evaluation of fringing flux in linear electromechanical devices 

    García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Cusidó Roura, Jordi; Romeral Martínez, José Luis; Ortega Redondo, Juan Antonio (2010-03-12)
    Article
    Restricted access - publisher's policy
    Accurate dynamic models of electromechanical devices are essential in order to develop effective motion control strategies of such devices. The effects of fringing flux can not be ignored when dealing with electromagn ...
  • Ecologia Industrial aplicada al sector adober de Catalunya 

    Puig Vidal, Rita; Cervantes Torre-Marín, Gemma; Rius Carrasco, Antoni; Martí Badia, Maria Elena; Solé Gustems, Miquel; Riba Ruiz, Jordi-Roger (2008)
    Article
    Restricted access - publisher's policy
    L'objectiu del projecte presentat aquí (que forma part del projecte CICLE), és conèixer la situació actual d'aprofitament i reciclatge de residues del sector adober català i fer propostes de millora seguint els principis ...
  • Ecologia Industrial aplicada al sector paperer de Catalunya 

    Puig Vidal, Rita; Rius Carrasco, Antoni; Martí Badia, Maria Elena; Solé Gustems, Miquel; Riba Ruiz, Jordi-Roger; Fullana Palmer, Pere (2008)
    Article
    Restricted access - publisher's policy
    L'objectiu del projecte presentat aquí (que forma part del projecte CICLE), és conèixer la situació actual d'aprofitament i reciclatge de residus del sector paperer català i fer propostes de millora seguint els principis ...
  • Electric systems 

    Riba Ruiz, Jordi-Roger (EUETII, UPC, 2010-09-15)
    Book
    Open Access