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Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM

Heins, Greg and Thiele, Mark (2011). Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM. In: IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society, Melbourne, Vic., Australia, 7-10 November 2011.

Document type: Conference Paper

IRMA ID CDU0002xPUB31
Author Heins, Greg
Thiele, Mark
Title Superposition techniques for analyzing cogging torque sensitivity to manufacturing errors in fractional pitch PMSM
Conference Name IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society
Conference Location Melbourne, Vic., Australia
Conference Dates 7-10 November 2011
Conference Publication Title IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society
Place of Publication United States of America
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Publication Year 2011
ISBN 978-1-61284-969-0   (check CDU catalogue open catalogue search in new window)
ISSN 1553-572X   (check CDU catalogue open catalogue search in new window)
Start Page 2042
End Page 2047
Total Pages 6
HERDC Category E1 - Conference Publication (DIISR)
Abstract Theoretically, the layout of fractional pitch permanent magnet motors should ensure the cancellation of most cogging torque harmonics. In reality, manufacturing errors lead to incomplete cancellation and higher than expected cogging torque. Two potential manufacturing errors are the variation in angle between successive magnets and the strength of the magnets. To determine the sensitivity of cogging torque to magnet strength and placement, a superposition technique is used. This technique is validated by first demonstrating that the total cogging torque can be reconstructed by summing offset versions of the torque from experimentally determined single-magnet/single- slot interactions. Following this validation, Monte Carlo simulations are conducted to statistically determine the sensitivity of cogging torque to magnet placement and strength errors. It is demonstrated that the mean RMS cogging torque increases by 4 % for every degree increase in magnet placement standard deviation and by 0.06% for every 1% increase in magnet strength standard deviation.
Additional Notes 10.1109/IECON.2011.6119622
Description for Link Link to conference paper
URL http://ieeexplore.ieee.org/xpl/articleDetails.jsp?&arnumber=6119622
 
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Created: Fri, 17 Jan 2014, 00:16:25 CST