Magnetic Field Prediction in Cubic Spoke-Type Permanent-Magnet Machine Considering Magnetic Saturation

Yunlu Du, Yunkai Huang, Baocheng Guo, Zakarya Djelloul-Khedda, Fei Peng*, Yu Yao, Jianning Dong

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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In this article, a nonlinear semianalytical model (SAM) is presented to predict the magnetic field distribution (MFD) and electromagnetic performances (EPs) in the cubic spoke-type permanent magnet (PM) machine. To model the rectangular PMs, the rectangular PM is simplified as a combination of fan-shaped regions with different arc angles. Then, the MFD and EPs of the cubic spoke-type machines can be obtained by the harmonic modeling technique. Particularly, the saturation of the magnetic bridges is considered by the nonlinear iterative algorithm. The proposed nonlinear SAM is studied on a 12-slot/8-pole cubic PM prototype, and the nonlinear finite element model and experiment verify its correctness. The main contribution of this article is to present a general analytical modeling method for cubic spoke-type PM machines and consider the magnetic saturation of magnetic bridges.

Original languageEnglish
Pages (from-to)2208-2219
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Issue number3
Publication statusPublished - 2024

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • Cubic spoke-type permanent magnet (PM) machine
  • harmonic modeling (HM)
  • magnetic saturation
  • nonlinear


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