Magnetic Field Prediction of U-shaped Interior Permanent Magnet Motor Considering Magnetic Bridge Saturation

Yunlu Du, Yunkai Huang, Baocheng Guo, Fei Peng, Yu Yao, Jianning Dong

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In this article, a new analytical model for predicting the magnetic field of the U-shaped interior permanent magnet motor (IPMM) is proposed. In the polar coordinates, rectangular permanent magnets are equivalent to the combination of consistent fan-shaped subdomains, and after that, the Laplace or Poisson equation of each solution domain can be obtained. Furthermore, based on the harmonic modeling (HM) technique, the saturation characteristics of the magnetic bridge are accurately considered, and then its magnetic field distribution (MFD) and electromagnetic performances (EPs) can be obtained. The approach proposed in this article includes but is not limited to U-shaped IPMMs, and it can also be applied to spoke-type or V-shaped IPMMs with a minor modification.

Original languageEnglish
Article number8200304
Pages (from-to)1-4
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number3
Publication statusPublished - 2023

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.


  • Analytical models
  • Harmonic modeling
  • Iron
  • Load modeling
  • Magnetic bridge saturation
  • Magnetic field
  • Magnetic fields
  • Magnetic flux
  • Rotors
  • Saturation magnetization
  • U-shaped interior permanent magnet motor (IPMM)


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