Show simple item record

AuthorAbdel-Khalik, A.S.
AuthorAhmed, S.
AuthorMassoud, Ahmed
Available date2022-03-23T06:57:35Z
Publication Date2015
Publication NameIEEE Transactions on Magnetics
ResourceScopus
Identifierhttp://dx.doi.org/10.1109/TMAG.2014.2364988
URIhttp://hdl.handle.net/10576/28782
AbstractOne of the main drawbacks of nonoverlapped coils in fractional slot concentrated winding permanent magnet (PM) machines are the high eddy current losses in both rotor core and permanent magnets induced by the asynchronous harmonics of the armature reaction field. It has been shown in the literature that the reduction of low space harmonics can effectively reduce the rotor eddy current losses. This paper shows that employing a combined star-delta winding to a three-phase PM machine with fractional slot windings and with a number of slots equal to 12, or its multiples, yields a complete cancellation to the fundamental magneto-motive force (MMF) component, which significantly reduces the induced rotor eddy current. Besides, it offers a slight increase in machine torque density. A case study on the well-known 12-slot/10-pole PM machine is conducted to explore the proposed approach. With the same concept, the general n-phase PM machine occupying 4n slots and with a dual n-phase winding is then proposed. This configuration offers a complete cancelation of all harmonics below the torque producing MMF component. Hence, the induced eddy currents in both rotor core and magnets are significantly reduced. The winding connection and the required number of turns for both winding groups are also given. The concept is applied to a 20-slot/18-pole stator with a dual five-phase winding, where the stator winding is connected as a combined star/pentagon connection. The proposed concept is assessed through a simulation study based on 2-D finite element analysis.
SponsorQatar National Research Fund
Languageen
PublisherInstitute of Electrical and Electronics Engineers Inc.
SubjectEddy currents
Finite element method
Harmonic analysis
Magnets
Rotors (windings)
Stars
Stators
Winding
2D finite element analysis
Eddy current-loss
Fractional slot
Fractional slot concentrated windings
Induced eddy currents
Loss reduction
Magnetomotive force
Permanent-magnet machine
Permanent magnets
TitleLow space harmonics cancelation in double-layer fractional slot winding using dual multiphase winding
TypeArticle
Issue Number5
Volume Number51
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record