A New Hybrid Method for Magnetic Field Calculation in IPMSM Accounting for Any Rotor Configuration

Baocheng Guo, Yunkai Huang, Fei Peng, Jianning Dong

Research output: Contribution to journalArticleScientificpeer-review

22 Citations (Scopus)
264 Downloads (Pure)


In this paper, a new hybrid model is proposed for the prediction of air gap magnetic field distribution (MFD) in interior permanent magnet machines with any rotor configuration. The slotless magnetic field is first predicted by finite-element method (FEM) with automatic scripting in MATLAB to consider saturation in the rotor iron. Afterward, the conformal mapping viz., Schwarz-Christoffel mapping is introduced to take the slotting effect into account. Consequently, the MFD could be calculated. The back electromagnetic forces, cogging torque, and output torque are obtained accordingly. Then a subdomain model is developed to consider the armature reaction. The results show that the proposed hybrid approach agrees well with the FEM. The model is further verified by experiments. The main contribution of this paper is to reduce the computation time remarkably while maintaining the calculation accuracy.

Original languageEnglish
Article number8458371
Pages (from-to)5015-5024
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Issue number7
Publication statusPublished - 2019

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
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.


  • Finite Element Model
  • Hybrid Model
  • Interior Permanent Magnet Machines
  • Schwarz-Christoffel Mapping


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