Investigation on the possible use of magnetic bearings in large direct drive wind turbines

G Shrestha, H Polinder, DJ Bang, AK Jassal, JA Ferreira

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    2 Citations (Scopus)


    A direct drive generator used in wind turbine has high energy yield compared to other drivetrain topologies and low maintenance is expected as the technology matures. On the other hand direct drive generator weight and size increases rapidly when scaled up to larger units. This paper will investigate the possibility of weight reduction of large direct drive generator using magnetic bearings without compromising maintenance. Three different configurations using magnetic bearings i.e. single magnetic bearing concept, flexible rotor and hybrid concept have been analyzed. The results show that a combination of magnetic bearings and mechanical bearing with stiff radial structure and axial flexibility i.e. hybrid concept has the possibility to reduce weight of direct drive machine significantly compared to conventional design.
    Original languageUndefined/Unknown
    Title of host publicationScientific proceedings European wind energy conference & exhibition, EWEC 2009
    Editors s.n.
    Place of PublicationBrussel
    Number of pages4
    Publication statusPublished - 2009
    EventEuropean wind energy conference & exhibition, EWEC 2009, Marseille - Brussel
    Duration: 16 Mar 200919 Mar 2009

    Publication series



    ConferenceEuropean wind energy conference & exhibition, EWEC 2009, Marseille


    • conference contrib. refereed
    • Conf.proc. > 3 pag

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