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Winding Factors and Magnetic Fields in Permanent-Magnet Brushless Machines With Concentrated Windings and Modular Stator Cores

Heins, Greg, Ionel, Dan M. and Thiele, Mark K. (2015). Winding Factors and Magnetic Fields in Permanent-Magnet Brushless Machines With Concentrated Windings and Modular Stator Cores. IEEE Transactions on Industry Applications,51(4):2924-2932.

Document type: Journal Article
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IRMA ID 75039815xPUB960
Title Winding Factors and Magnetic Fields in Permanent-Magnet Brushless Machines With Concentrated Windings and Modular Stator Cores
Author Heins, Greg
Ionel, Dan M.
Thiele, Mark K.
Journal Name IEEE Transactions on Industry Applications
Publication Date 2015
Volume Number 51
Issue Number 4
ISSN 0093-9994   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-84937864714
Start Page 2924
End Page 2932
Total Pages 9
Place of Publication United States
Publisher Institute of Electrical and Electronics Engineers
Field of Research ENGINEERING
HERDC Category C1 - Journal Article (DIISR)
Abstract Removing some sections of the stator yoke in a permanent-magnet brushless machine can be beneficial for reducing punching waste and simplifying motor manufacture. However, in some cases, restricting the possible flux paths, in this way, will have a detrimental impact on the torque and air-gap harmonics. This paper discusses the potential implications of modular stator core arrangements and presents the air-gap flux density harmonics and winding factors for potential slot/pole combinations. Finite-element analysis (FEA) simulations are presented to support the analytical calculations. The analysis indicates that the performance reduction from using a modular stator is minimal when the number of slots and poles are similar but drops off substantially when this is not the case. A modular core stator will increase the MMF subharmonics due to the magnet field but can reduce the subharmonics due to the armature if a single-layer winding is used. The effect of slotting is very similar for a modular and conventional core machine, and FEA results match previously published analytical analyses.
Keywords Stator cores
Magnetic cores
Windings
Harmonic analysis
Stator windings
Magnetic flux
DOI http://dx.doi.org/10.1109/TIA.2015.2394444   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Tue, 26 Jul 2016, 12:36:41 CST