Design optimization and performance comparison of two linear motor topologies with PM-less tracks

S.R. Aleksandrov, T.T. Overboom, E.A. Lomonova

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)
142 Downloads (Pure)


An essential requirement for a long-stroke linear motion system is a low-cost and robust track. To allow the implementation of a linear motor topology in such application, passive tracks, consisting no rare-earth material, are recommended to reduce the price. This paper presents a comparison between two linear motor topologies with permanent magnet (PM)-less tracks: e.g., linear induction motor (LIM) and linear flux-switching permanent magnet motor (LFSM). These motors are benchmarked to a linear permanent magnet synchronous motor (LSM), which merits itself for high force density. The LIM and the LFSM are optimized for maximized continuous force while considering the same footprint as the LSM. The optimization is based on a multiphysical model containing an analytical representation of the magnetic field distribution, force production, power losses, and thermal the behavior of both structures. The obtained parameters are used to compare different configurations of both motors to the LSM. The results of the comparison show that at the price of higher losses, both topologies have comparable thrust force to the LSM.

Original languageEnglish
Article number8208408
Number of pages8
JournalIEEE Transactions on Magnetics
Issue number11
Early online date27 Jun 2018
Publication statusPublished - 1 Nov 2018
Event2018 IEEE International Magnetics Conference (INTERMAG 2018) - Marina Bay Sands Convention Center, Singapore, Singapore, Singapore
Duration: 23 Apr 201827 Apr 2018


  • Design optimization
  • electric machines
  • electromagnetic analysis
  • electromagnetic modeling
  • induction motors
  • permanent magnet motors


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