Analysis of iron losses on the cutting edges of induction motor core laminations

Paavo Rasilo, Ugur Aydin, Timo P. Holopainen, Antero Arkkio

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

11 Citations (Scopus)


A 37 kW induction motor is modeled numerically taking into account the deterioration of the magnetic material properties at the cut edges of the core laminations. The magnetization properties and specific loss curves of the damaged edge and the intact material have been estimated from measurements published earlier. The deteriorated edges affect the iron losses of the machine in two distinct ways. First of all, the reduced permeability at the edges causes higher local flux densities elsewhere, which increases the losses. On the other hand, the cutting also has a direct effect on the specific loss density at the edges. By numerical simulations we show that the main effect is the latter one, and that the effect of decreased permeability remains low. The iron losses increase up to 37.6 %. The torque and active power of the machine are not much affected by the cutting, although also the current and resistive losses slightly increase due to the decreased permeability at the edges.

Original languageEnglish
Title of host publicationProceedings of the 2016 22nd International Conference on Electrical Machines, ICEM 2016
Number of pages6
ISBN (Electronic)9781509025381
Publication statusPublished - 2 Nov 2016
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Electrical Machines - Lausanne, Switzerland
Duration: 4 Sep 20167 Sep 2016
Conference number: 22


ConferenceInternational Conference on Electrical Machines
Abbreviated titleICEM
Internet address


  • Electrical machines
  • finite element analysis
  • magnetic materials
  • power losses

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