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AuthorAbdel-Khalik, Ayman S.
AuthorElgenedy, Mohamed A.
AuthorAhmed, S.
AuthorMassoud, Ahmed M.
Available date2015-06-23T09:59:34Z
Publication Date2015-04
Publication NameIEEE Transactions on Industrial Electronics
CitationAbdel-Khalik, A.S.; Elgenedy, M.A.; Ahmed, S.; Massoud, A.M., "An Improved Fault Tolerant Five-Phase Induction Machine Using A Combined Star/Pentagon Single Layer Stator Winding Connection," Industrial Electronics, IEEE Transactions on
ISSN0278-0046
URIhttp://dx.doi.org/10.1109/TIE.2015.2426672
URIhttp://hdl.handle.net/10576/3386
AbstractOne of the main merits offered by multiphase machines is their high fault-tolerant capability. Literature has demonstrated that the performance of multiphase induction machines under fault conditions is affected by the employed stator winding connection. In open-loop controlled five-phase machines, the star connection is favorable under healthy conditions while the pentagon connection is favorable and yields a lower derating factor under the open phase condition. In this paper, a new combined star/pentagon single layer winding layout that combines the advantages of both star and pentagon connections is proposed for a five-phase induction machine. Although the proposed winding is intrinsically an asymmetrical 10-phase machine, the proposed connection allows for only five-phase terminals. Moreover, the proposed winding not only yields better flux distribution compared to a conventional single layer winding, but also provides a complete cancellation of the third order harmonic flux component caused by the induced third sequence currents due to the saturation effect and/or under unbalanced operation. Hence, the machine losses are decreased, which improves the overall machine efficiency. For the healthy case, the machine is similar to a conventional star connected five-phase machine. However, with one phase open, the proposed connection results in a lower derating factor compared to conventional connections for both open-loop and optimal current control techniques. A 1kW prototype machine is used for experimental verification.
Languageen
PublisherIEEE
SubjectDerating factors
Multiphase machine
pentagon connection
TitleAn Improved Fault Tolerant Five-Phase Induction Machine Using A Combined Star/Pentagon Single Layer Stator Winding Connection
TypeArticle
Pagination618-628
dc.accessType Abstract Only


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