Now showing items 1-12 of 120

    • Modeling of a DC-DC bidirectional converter used in mild hybrid electric vehicles from measurements 

      Rojas Dueñas, Gabriel; Riba Ruiz, Jordi-Roger; Moreno Eguilaz, Juan Manuel (2021-10-13)
      Article
      Restricted access - publisher's policy
      This paper presents a non-intrusive approach for modeling a bidirectional DC-DC converter used in mild hybrid electric vehicles. A black-box identification methodology is proposed to find a model based on the data acquired ...
    • State of health prediction of power connectors by analyzing the degradation trajectory of the electrical resistance 

      Martínez Reyes, Jimmy Arturo; Riba Ruiz, Jordi-Roger; Moreno Eguilaz, Juan Manuel (2021-06-11)
      Article
      Open Access
      Estimating the remaining useful life (RUL) or the state of health (SoH) of electrical components such as power connectors is still a challenging and complex task. Power connectors play a critical role in medium- and ...
    • Parameter estimation of a single-phase boost PFC converter with EMI filter based on an optimization algorithm 

      Rojas Dueñas, Gabriel; Riba Ruiz, Jordi-Roger; Moreno Eguilaz, Juan Manuel (2021-05-21)
      Article
      Open Access
      This paper proposes an approach to estimate the parameters of an AC–DC boost power factor corrector converter that includes an EMI filter. To this end, once the topology was known, the values of the passive elements were ...
    • 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 ...