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AuthorAbdel-Khalik, A.S.
AuthorAhmed, Shehab
AuthorMassoud A.
Available date2016-09-21T08:12:09Z
Publication Date2014-09
Publication NameAlexandria Engineering Journal
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.aej.2014.06.002
CitationAbdel-Khalik, A.S., Ahmed, S., Massoud, A. "A bearingless coaxial magnetic gearbox" (2014) Alexandria Engineering Journal, 53 (3), pp. 573-582.
ISSN1110-0168
URIhttp://hdl.handle.net/10576/4722
AbstractRecently, magnetic gearboxes (MGBs) are serious contenders to their conventional mechanical counterparts in terms of reduced maintenance requirements, improved reliability, tolerance to mechanical inaccuracies, and inherent overload protection. MGBs are preferably employed in high speed applications and compact harsh environments subjected to severe shock and vibration. A high gear ratio MGB is also a suitable candidate for single stage high-speed transmission applications such as helicopter power transmissions. In this paper, the conventional planetary magnetic gearbox is equipped with a three-phase winding to provide additional magnetic levitation capabilities besides torque transmission, thus creating a bearingless MGB configuration. This was achieved by adding a three-phase winding in the space between the ferromagnetic pieces. The current in this additional winding is controlled to provide decoupled axial forces irrespective of the transmitted mechanical power. This feature is important to reduce the mechanical losses especially for high-speed rotors and can be a viable method for vibration suppression.
SponsorNPRP Grant NPRP 4 - 941 - 2 - 356 from the Qatar National Research Fund (a member of Qatar Foundation). Open Access funded by Faculty of Engineering, Alexandria University.
Languageen
PublisherElsevier
SubjectBearingless machines
Finite elements
Gearbox
Magnetic planetary gear
Permanent magnets
Speed reduction ratio
TitleA bearingless coaxial magnetic gearbox
TypeArticle
Pagination573-582
Issue Number3
Volume Number53


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