Design and optimization of a slot-PM-assisted doubly-salient machine based on saturation assuaging

Yuan Mao, Shuangxia Niu, Qingsong Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


In this study, a novel slot PM-assisted doubly-salient machine (SPMA-DSM) is proposed based on saturation assuaging. In this machine, DC current is adopted as the excitation source. The permanent magnets assembled in slots are used to realize saturation assuaging, which can offer higher torque density and improved overload capability. Additionally, the torque density can be extended to wider scale before saturation. Multi-objective optimization based on differential evolution (DE) coupled with finite element method (FEM) is conducted to further improve the performance of the proposed machine. When compared to traditional flux-controllable machine, the PMAHEM exhibits the merits of: (1) higher torque density per PM volume, (2) lower torque ripple, and (3) wider flux controllable range. The simulation results indicate that the electromagnetic torque increases by more than 20% after the saturation assuaging design and optimization.

Original languageEnglish
Pages (from-to)65-72
Number of pages8
JournalChinese Journal of Electrical Engineering
Issue number3
Publication statusPublished - Sept 2021


  • Doubly-salient machine
  • finite element method
  • multi-objective optimization
  • saturation assuaging

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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