Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/61258
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Type: Journal article
Title: Torque ripple reduction in interior permanent magnet synchronous machines using stators with odd number of slots per pole pair
Author: Han, S.
Jahns, T.
Soong, W.
Guven, M.
Illindala, M.
Citation: IEEE Transactions on Energy Conversion, 2010; 25(1):118-127
Publisher: IEEE-Inst Electrical Electronics Engineers Inc
Issue Date: 2010
ISSN: 0885-8969
Statement of
Responsibility: 
Seok-Hee Han, Thomas M. Jahns, Wen L. Soong, Mustafa K. Güven and Mahesh S. Illindala
Abstract: This paper develops analytical principles for torque ripple reduction in interior permanent magnet (IPM) synchronous machines. The significance of slot harmonics and the benefits of stators with odd number of slots per pole pair are highlighted. Based on these valuable analytical insights, this paper proposes coordination of the selection of stators with odd number of slots per pole pair and IPM rotors with multiple layers of flux barriers in order to reduce torque ripple. The effectiveness of using stators with odd number of slots per pole pair in reducing torque ripple is validated by applying a finite-element-based Monte Carlo optimization method to four IPM machine topologies, which are combinations of two stator topologies (even or odd number of slots per pole pair) and two IPM rotor topologies (one- or two-layer). It is demonstrated that the torque ripple can be reduced to less than 5% by selecting a stator with an odd number of slots per pole pair and the IPM rotor with optimized barrier configurations, without using stator/rotor skewing or rotor pole shaping.
Keywords: Interior permanent magnet (IPM) synchronous machines
odd number of stator slots per pole pair
stator slot harmonics
torque ripple
Rights: Copyright status unknown
DOI: 10.1109/TEC.2009.2033196
Published version: http://dx.doi.org/10.1109/tec.2009.2033196
Appears in Collections:Aurora harvest 5
Electrical and Electronic Engineering publications
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