Cogging torque reduction for radially laminated flux-switching permanent magnet machine with 12/14 poles

Wei Xu, Jianguo Zhu, Yongchang Zhang, Jiefeng Hu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

28 Citations (Scopus)


Flux-switching permanent-magnet machine (FSPMM) offers high torque density, impressive flux weakening capability and mechanical ruggedness because of its distinctive configuration, and is potentially suitable for the application in the plug-in hybrid electric vehicle (PHEV). However, the FSPMM compared with other traditional machines commonly used in the PHEV generally exhibits higher cogging torque for its double salient structures of both stator and rotor poles. Furthermore, the back EMF wave including odd harmonics especially 3rdand 5thones are not ideally sinusoidal that could bring some extra copper loss and decrease its efficiency. Hence, how to minimize the cogging torque so to reduce the torque ripple, and how to reduce the total harmonic distortion (THD) of the back EMF wave are important issues in the field of FSPMM. Four rotor topologies in this paper are proposed to suppress the cogging torque and make the back EMF more sinusoidal for an FSPMM with 12/14 (stator/rotor) poles so as to make it more suitable to the brushless AC (BLAC) operation. Plenty of theory analysis and quantitative comparisons are made between different schemes. The validity of the proposed techniques has been confirmed by 2-D models of the finite element algorithm (FEA) executed in commercial software, Ansoft Maxwell 12.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publicationIECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society
Number of pages6
Publication statusPublished - 1 Dec 2011
Externally publishedYes
Event37th Annual Conference of the IEEE Industrial Electronics Society, IECON 2011 - Melbourne, VIC, Australia
Duration: 7 Nov 201110 Nov 2011


Conference37th Annual Conference of the IEEE Industrial Electronics Society, IECON 2011
CityMelbourne, VIC

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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