Structural Topology Optimization of High-Speed Permanent Magnet Machine Rotor

Aino Manninen, Janne Keränen, Jenni Pippuri-Mäkeläinen, Damijan Miljavec, Selma Čorović, Alen Alič, Urban Rupnik, Mehrnaz Farzam Far, Timo Avikainen

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


We study the structural topology optimization (TO) of a high-speed electrical machine rotor. The electromagnetic design of the machine is taken as a starting point for the optimization. The optimization design space is chosen to be the area where the magnetic flux does not exceed the level of 0.6 T. The structural TO problem is formulated using material density TO and globally convergent method of moving asymptotes. Our objective is to minimize the mass of the rotor core with the upper limit of the total elastic strain energy as a constraint. The TO results in a lighter, i.e. compact, yet mechanically strong and feasible rotor design. It is confirmed by electromagnetic finite element analyses that the obtained TO design meets the expected electromechanical performance.
Original languageEnglish
Title of host publication2020 International Conference on Electrical Machines, ICEM
PublisherIEEE Institute of Electrical and Electronic Engineers
ISBN (Electronic)978-1-7281-9945-0
ISBN (Print)978-1-7281-9946-7
Publication statusPublished - 23 Aug 2020
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Electrical Machines, ICEM 2020 - Virtual conference, Gothenburg, Sweden
Duration: 23 Aug 202026 Aug 2020


ConferenceInternational Conference on Electrical Machines, ICEM 2020
Internet address


  • design optimization
  • electric machines
  • permanent magnet machines
  • rotors
  • structural engineering
  • stress
  • strain


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