NDLI: Impact of the rotor back-iron resistivity on the rotor eddy-current losses in fractional-slot concentrated windings PM machines

Content Provider	IEEE Xplore Digital Library
Author	Cavagnino, A. Lazzari, M. Miotto, A. Tenconi, A. Vaschetto, S.
Copyright Year	2011
Description	Author affiliation: Politecnico di Torino, Dipartimento di Ingegneria Elettrica, Corso Duca degli Abruzzi 24, 10129, ITALY (Cavagnino, A.; Lazzari, M.; Miotto, A.; Tenconi, A.; Vaschetto, S.)
Abstract	It is well known that in fractional-slot concentrated windings the eddy-current losses in the permanent magnets can be relevant and, for this reason, they must be evaluated in the machine design procedure. The paper investigates the influence of the rotor back-iron resistivity on the rotor eddy-current losses in this machine typology. In particular, a external rotor annulus shape PM machine with fractional-slot non-overlapping concentrated windings is considered. The machine is a scaled representative prototype of starters/generators embedded in aircraft engines. Both the rotor back-iron and permanent magnet eddy-currents are simultaneously considered by means of bi-dimensional transient FEM simulations, including effects of stator slotting, rotor motion and material saturation. The analysis is conducted increasing the rotor back-iron resistivity from an ideal situation of a high-conducting material up to the opposite ideal condition of a non-conducting material. Adjusting the rotor back-iron resistivity, the space MMF harmonic components influence on the machine torque is qualitatively investigated and discussed too.
Starting Page	1604
Ending Page	1611
File Size	1185043
Page Count	8
File Format	PDF
ISBN	9781457705427
e-ISBN	9781457705410
DOI	10.1109/ECCE.2011.6063974
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic cores Rotor eddy-current losses Windings Rotors Materials Conductivity Harmonic analysis Rotor back-iron resistivity More Electric Engine (MEE) applications Permanent magnet machine Permanent magnets Fractional-slot non-overlapping concentrated winding
Content Type	Text
Resource Type	Article

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