Recent Submissions

  • Characterizing the temperature dependence of the contact resistance in substation connectors 

    Riba Ruiz, Jordi-Roger; Martínez Reyes, Jimmy Arturo; Moreno Eguilaz, Juan Manuel; Capelli, Francesca (Elsevier, 2021-04)
    Article
    Restricted access - publisher's policy
    The electrical resistance, and in particular, the electrical contact resistance (ECR), plays a critical role in the electrical and thermal behaviors of substation connectors. Despite its impact, there are very few research ...
  • PMSM design for achieving a target torque-speed-efficiency map 

    Candelo Zuluaga, Carlos Andres; García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Tubert Blanch, Pere (Institute of Electrical and Electronics Engineers (IEEE), 2020-11-24)
    Article
    Open Access
    During the last years, the requirements for a fast and reliable design of electrical machines by applying optimization methods using finite element analysis (FEA), has become a subject of study. Due to their capabilities, ...
  • Autonomous energy management system with self-healing capabilities for green buildings (Microgrids) 

    Selseleh Jonban, Mansour; Romeral Martínez, José Luis; Akbarimajd, Adel; Ali, Zunaib; Ghazimirsaeid, Seyedeh Samaneh; Marzband, Mousa; Putrus, Ghanim (Elsevier, 2020-06-19)
    Article
    Restricted access - publisher's policy
    Nowadays, distributed energy resources are widely used to supply demand in micro grids specially in green buildings. These resources are usually connected by using power electronic converters, which act as actuators, to ...
  • 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
    Open Access
    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 ...
  • A revised solution for a sphere rolling in a vertical loop 

    Bertran Cànovas, Òscar; Riba Ruiz, Jordi-Roger (2020-09-30)
    Article
    Restricted access - publisher's policy
    In this paper the classical well known solution of the elementary problem of the sphere loop in the presence of friction is studied. Also, a modification of the problem shows a possible inaccuracy involved on the well known ...
  • Time series RUL estimation of medium voltage connectors to ease predictive maintenance plans 

    Gómez-Pau, Álvaro; Riba Ruiz, Jordi-Roger; Moreno Eguilaz, Juan Manuel (2020-12-17)
    Article
    Open Access
    The ageing process of medium voltage power connectors can lead to important power system faults. An on-line prediction of the remaining useful life (RUL) is a convenient strategy to prevent such failures, thus easing the ...
  • Insulation failure quantification based on the energy of digital images using low-cost imaging sensors 

    Riba Ruiz, Jordi-Roger; Gómez-Pau, Álvaro; Moreno Eguilaz, Juan Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2020-12-16)
    Article
    Open Access
    Insulation faults in high-voltage applications often generate partial discharges (PDs) accompanied by corona activity, optical radiation mainly in the ultraviolet (UV) and visible bands. Recent developments in low-cost, ...
  • On-line health condition monitoring of power connectors focused on predictive maintenance 

    Martínez Reyes, Jimmy Arturo; Gómez-Pau, Álvaro; Riba Ruiz, Jordi-Roger; Moreno Eguilaz, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2020-12-16)
    Article
    Restricted access - publisher's policy
    Electrical power connectors are critical points of electrical networks. Failure in high-voltage connectors may result in major power outages, safety risks and important economic consequences. Therefore, there is an imperious ...
  • Detection of partial demagnetization faults in five-phase permanent magnet assisted synchronous reluctance machines 

    Candelo Zuluaga, Carlos Andres; Riba Ruiz, Jordi-Roger; Thangamuthu, Dinesh V; García Espinosa, Antonio (2020-07-03)
    Article
    Open Access
    This paper analyzes partial demagnetization faults in a five-phase permanent magnet assisted synchronous reluctance motor (fPMa-SynRM) incorporating ferrite permanent magnets (PMs). These faults are relevant because of the ...
  • SmartConnector: A Self-Powered IoT Solution to Ease Predictive Maintenance in Substations 

    Kadechkar, Akash; Riba Ruiz, Jordi-Roger; Moreno Eguilaz, Juan Manuel; Pérez Lobato, Joan (2020-05-28)
    Article
    Restricted access - publisher's policy
    The increased dependency on electricity of modern society makes reliability of power transmission systems a key point. This goal can be achieved by continuously monitoring power grid parameters, so possible failure modes ...
  • Directional ultrasound source for solid materials inspection: diffraction management in a metallic phononic crystal 

    Mohamed Selim, Hossameldin; Pico Vila, Rubén; Trull Silvestre, José Francisco; Delgado Prieto, Miquel; Cojocaru, Crina (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-29)
    Article
    Open Access
    In this work, we numerically investigate the diffraction management of longitudinal elastic waves propagating in a two-dimensional metallic phononic crystal. We demonstrate that this structure acts as an “ultrasonic lens”, ...
  • Circular economy of post-consumer textile waste: classification through infrared spectroscopy 

    Riba Ruiz, Jordi-Roger; Cantero, Rosa; Canals, Trini; Puig Vidal, Rita (2020-11-01)
    Article
    Restricted access - publisher's policy
    The textile and fashion industry is amongst the most resource-intensive and polluting industries, thus impacting the natural environment. During the last decades, there has been an increase in the manufacturing of textiles. ...

View more