Multi-Material Topology Optimization with Continuous Magnetization Direction for motors design

T. Gauthey, P. Gangl, M. Hage Hassan

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


Permanent magnet-assisted synchronous reluctance motors (PMSynRM) have a significantly higher average torque than synchronous reluctance motors. Thus, determining an optimal design results in a multi-material topology optimization problem, where one seeks to distribute ferromagnetic material, air and permanent magnets within the rotor in an optimal manner. In this paper, we propose the use of density-based distribution scheme, which allows for continuous magnetization direction. A filter using K-mean clustering is used to determine the magnetization angle final distribution accounting for technical feasibility. As for the ferromagnetic material interpolation, a novel interpolation scheme inspired by the topological derivative is established. A comparison with several interpolation schemes is proposed. Finally, the design of the electrical motor is proposed to maximize the torque value.

Original languageEnglish
Title of host publication2022 International Conference on Electrical Machines, ICEM 2022
PublisherInstitute of Electrical and Electronics Engineers
Number of pages7
ISBN (Electronic)9781665414326
Publication statusPublished - 2022
Event2022 International Conference on Electrical Machines: ICEM 2022 - Valencia, Valencia, Spain
Duration: 5 Sep 20228 Sep 2022


Conference2022 International Conference on Electrical Machines
Abbreviated titleICEM 2022


  • Motors
  • Numerical models
  • Optimization
  • Permanent magnet machines

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering


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