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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. (2013). Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores. In: 5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013, Denver, CO, September 15, 2013-September 19, 2013.

Document type: Conference Paper
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Author Heins, Greg
Ionel, Dan M.
Thiele, Mark K.
Title Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores
Conference Name 5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013
Conference Location Denver, CO
Conference Dates September 15, 2013-September 19, 2013
Conference Publication Title 2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013
Publication Year 2013
ISBN 9781479903351   (check CDU catalogue open catalogue search in new window)
Start Page 5048
End Page 5055
Total Pages 8
Field of Research ENGINEERING
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. FEA simulations are presented to support the analytical calculations. The analysis suggests 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 sub-harmonics due to the magnet field but can reduce the sub-harmonics 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.
Keyword Stator cores
Magnetic cores
Windings
Harmonic analysis
Stator windings
Magnetic flux
Description for Link Link to Conference proceedings
URL http://ieeexplore.ieee.org/document/6647382/
 
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Created: Fri, 29 Aug 2014, 16:21:53 CST by Anthony Hornby