A novel double-sided offset stator axial-flux permanent magnet motor for electric vehicles

Han Wang, Xiaoze Pei, Boyuan Yin, John Frederick Eastham, Christopher Vagg, Vincent Zeng

Research output: Contribution to journalArticlepeer-review

3 Citations (SciVal)


Axial-flux permanent magnet (AFPM) motors have been attracting great interest due to their key advantages of high-torque density and compact structure. Concentrated windings are commonly used for AFPM motors since they significantly reduce the radial length of the end windings. This paper proposes a novel double-sided stator single-rotor motor topology where one stator is offset by π radians. This arrangement can cancel significant space harmonics produced by the concentrated winding and reduce the core and permanent magnet losses. Analytical analysis and finite element analysis (FEA) are used to verify the principle and validate the topology. The simulation results demonstrate that this proposed double-sided offset stator motor can reduce the core loss and permanent magnet loss significantly at base speed compared with the conventional double-sided stator single-rotor motor. In addition, the magnetic core saturation and induced voltage for the double-sided offset stator motor are significantly reduced
Original languageEnglish
Article number52
JournalWorld Electric Vehicle Journal (WEVJ)
Issue number3
Publication statusPublished - 15 Mar 2022


  • axial-flux motor
  • concentrated winding
  • double-sided offset stator motor
  • electric vehicle

ASJC Scopus subject areas

  • Automotive Engineering


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