Numerical Analysis of Stator Magnetic Wedge Effects on Equivalent Circuit Parameters of Brushless Doubly Fed Machines

Salman Abdi Jalebi, Ehsan Abdi, Richard McMahon

    Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review

    5 Citations (Scopus)
    165 Downloads (Pure)

    Abstract

    This paper studies the effects of magnetic wedges used for closing stator open slots on the Brushless Doubly Fed Machines' (BDFM) equivalent circuit parameters. The BDFM is an attractive generator solution for offshore wind power and can replace doubly-fed slip-ring induction generators. It is shown in this paper that the use of magnetic wedges, commonly used in large induction machines, reduces the stator windings magnetising currents, reflected in the values of magnetising inductances. But they also increase the leakage flux of the stator windings and hence change the series inductance in the equivalent circuit. The series inductance significantly affects the machine performance as well as the rating of its converter. 2-D Finite element analysis of a 250 kW experimental BDFM is used to investigate the effects of magnetic wedges on the machine's magnetic field distribution and how these can alter the machine's parameters values. Experimental tests have also been carried out to validate the analysis.
    Original languageEnglish
    Title of host publication XIII International Conference on Electrical Machines (ICEM)
    PublisherIEEE
    Pages879-884
    Number of pages6
    ISBN (Electronic)978-1-5386-2477-7
    ISBN (Print)978-1-5386-2478-4
    DOIs
    Publication statusPublished - 25 Oct 2018
    EventXIII International Conference on Electrical Machines - Alexandroupoli, Greece
    Duration: 3 Sept 20186 Sept 2018
    http://www.icem.cc/2018/

    Conference

    ConferenceXIII International Conference on Electrical Machines
    Abbreviated titleICEM 2018
    Country/TerritoryGreece
    CityAlexandroupoli
    Period3/09/186/09/18
    Internet address

    Bibliographical note

    ISSN - 2381-4802

    Keywords

    • Magnetic flux
    • Magnetic circuits
    • Stator windings
    • Equivalent circuits
    • Integrated circuit modeling
    • Rotors

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