Saavedra Ordoñez, Harold
Total activity: 9
Department
Department of Electronic Engineering
E-mail
harold.saavedramcia.upc.edu
Contact details
UPC directory Open in new window

Graphic summary
  • Show / hide key
  • Information


Scientific and technological production
  •  

1 to 9 of 9 results
  • Detection of interturn faults in PMSMs with different winding configuration

     Saavedra Ordoñez, Harold; Urresty Betancourt, Julio; Riba Ruiz, Jordi Roger; Romeral Martinez, Jose Luis
    Energy conversion and management
    Date of publication: 2014-03-03
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    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 irreversibly damage the PMSM. Therefore, it is highly desirable to develop suitable methods for the early detection of such faults. The effects of interturn faults are visible in both the stator currents and the zero-sequence voltage component (ZSVC) spectra. By designing appropriate fault diagnosis schemes based on the analysis of the harmonic content of such electric variables it is possible to detect short circuit faults in its early stage. However, the stator winding configuration of the PMSM deeply impacts the harmonic content of both spectra. This paper studies the effects of different stator winding configurations in both the stator currents and the ZSVC spectra of healthy and faulty machines. Results presented may help to develop fault diagnosis schemes based on the acquisition and further analysis of the stator currents and/or the ZSVC harmonic components.

  • Inter-turn fault detection in five-phase PMSMs. Effects of the fault severity

     Saavedra Ordoñez, Harold; Riba Ruiz, Jordi Roger; Romeral Martinez, Jose Luis
    IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives
    Presentation's date: 2013-08-30
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    This paper deals with the effects of inter-turn short circuit faults in five-phase permanent magnet synchronous motors (PMSMs). For this purpose a finiteelements model (FEM) of a faulty machine with 1, 2 and 4 inter-turns in short circuit is analyzed. From the results of this model the effects of these fault severities in the stator currents and zero-sequence voltage components (ZSVC) harmonics is analyzed and the possibility of developing a fault diagnosis scheme based on the changes in their spectral content is exposed. Moreover, the effect of the fault severity on the total power losses in the machine is presented. Inter-turn faults generate large circulating currents which may lead to catastrophic failures. Therefore it is very important to know the increase in power losses in the machine due to the occurrence of such faults for applying corrective actions at the precise time once the fault has been diagnosed.

  • Access to the full text
    Magnet shape influence on the performance of AFPMM with demagnetization  Open access

     Saavedra Ordoñez, Harold; Riba Ruiz, Jordi Roger; Romeral Martinez, Jose Luis
    Annual Conference of the IEEE Industrial Electronics Society
    Presentation's date: 2013-11-13
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    In this paper the effect of the magnets shape on the AFPMM performance under a demagnetization fault has been analyzed by means of 3D-FEM simulations. Demagnetization faults in permanent magnet synchronous motors (PMSMs) may generate specific fault harmonic frequencies in the stator currents, output torque and the zero-sequence voltage component (ZSVC) spectra the ones can affect motor behavior, and so these parameters have been studied and compared, for each magnet configuration in each condition. These analyses are carried out to find out the more suitable geometry for an operation under healthy and faulty condition.

  • Magnet shape influence on the performance of AFPMM in a torus configuration

     Saavedra Ordoñez, Harold; Riba Ruiz, Jordi Roger; Hernandez Guiteras, Joan; Romeral Martinez, Jose Luis
    International Conference on Power Engineering, Energy and Electrical Drives
    Presentation's date: 2013-05-16
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The axial flux permanent magnet machine (AFPMM)is being increasingly demanded for special applications, particularly for transportation systems and concretely for inwheel applications. In this paper the effect of the magnets shape on the AFPMM performance has been analyzed by means of 3DFEM simulations. To this end the air-gap magnetic flux density, the back electromotive force (back-EMF), the cogging torque and the total torque waveforms of the analyzed AFPMMs with different magnets geometries have been studied and compared. The harmonic content of all these variables has been also analyzed. These analyses are carried out to find out the more suitable geometry for in-wheel applications and particularly to minimize the torque ripple of the AFPMM.

  • Redesign of a spherical corona shield for UHV substation connectors

     Hernandez Guiteras, Joan; Riba Ruiz, Jordi Roger; Saavedra Ordoñez, Harold
    International Conference on Power Engineering, Energy and Electrical Drives
    Presentation's date: 2013-05-15
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Analysis of demagnetization faults in surface-mounted permanent magnet synchronous with inter-turns and phase-to-ground short-circuits

     Urresty Betancourt, Julio César; Riba Ruiz, Jordi Roger; Romeral Martinez, Jose Luis; Saavedra Ordoñez, Harold
    International Conference on Electrical Machines
    Presentation's date: 2012-09-03
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    Demagnetization faults are troublesome in permanent magnet synchronous motors since they may greatly reduce their performance and efficiency. Additionally, the temperature of the magnets deeply influences the remanent flux density. Hence, the temperature may have a demagnetization effect on the magnets. This work studies the behavior of a surface-mounted permanent magnet synchronous motor running under inter-turn and phase-to-ground short-circuits faults. Concretely, the temperature increase of such faults and a potential reversible or irreversible demagnetization of the rotor magnets are analyzed. The analysis is based on 2D FEM simulations which includes rotor magnet skew. The simulations conducted in this work clearly show that inter-turn faults do not lead to irreversible demagnetization. However, in case of a phase-to-ground short-circuit an irreversible demagnetization may take place instantaneously

  • Access to the full text
    Detection of inter-turns short circuits in permanent magnet synchronous motors operating under transient conditions by means of the zero sequence voltage  Open access

     Urresty Betancourt, Julio César; Riba Ruiz, Jordi Roger; Saavedra Ordoñez, Harold; Romeral Martinez, Jose Luis
    European Conference on Power Electronics and Applications
    Presentation's date: 2011-09-01
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    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 transient conditions. Additionally it proves the linear relationship between the ZSVC and speed, which is effectively used as a fault severity index. The acquired ZSVC temporal signal is processed by means of the Hilbert-Huang transform (HHT). Experimental results presented in this work show the advantages of the method to provide helpful data for online diagnosis of stator winding inter-turn faults.

    Postprint (author’s final draft)

  • Analysis of demagnetization faults in surface-mounted permanent magnet synchronous motors with symmetric windings

     Urresty Betancourt, Julio César; Riba Ruiz, Jordi Roger; Saavedra Ordoñez, Harold; Romeral Martinez, Jose Luis
    IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives
    Presentation's date: 2011-09-07
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    This paper analyzes a surface-mounted permanent magnet synchronous motor with symmetric winding configuration running under demagnetization fault. The analysis is based on 2D FEM simulations which includes rotor magnet skewed effects. Two types of demagnetization are analyzed; uniform and local demagnetization. It is proposed the use of zero-sequence voltage component for fault diagnosis purposes. Simulations and experimental results show the suitability of the method.

  • Modelos electromágneticos FEM de motores PMSM RF/AF y controles sensoriess de velocidad

     Romeral Martinez, Jose Luis; Garcia Espinosa, Antonio; Sala Caselles, Vicente Miguel; Delgado Prieto, Miguel; Saavedra Ordoñez, Harold; Michalski, Tomasz Dobromir; Salehi Arashloo Arashloo, Ramin
    Participation in a competitive project

     Share