Effect of Punching the Electrical Sheets on Optimal Design of a Permanent Magnet Synchronous Motor

Research output: Contribution to journalArticleScientificpeer-review


Research units

  • Tallinn University of Technology
  • Tampere University of Technology


Cutting the electrical steel sheets to form the shape of the stator and the rotor affects the magnetic properties of the sheets. The increase of the magnetic losses as well as the drop of the magnetic permeability can impact on the design of electrical devices. This paper investigates this deterioration effect on the optimal design of the stator of a high-speed permanent magnet synchronous motor. The deterioration due to punching is phenomenologically analyzed based on measurement of strips of steel sheets with various widths on an enlarged Epstein frame. The losses are computed with a Bertotti model whose coefficients depend on the width of the sheets. The optimization of a synchronous machine is then carried out with this magnetic losses model.


Original languageEnglish
Article number8102004
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number3
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

    Research areas

  • Electrical steel sheets, Frequency measurement, Loss measurement, Magnetic hysteresis, Magnetomechanical effects, Optimization, optimization, punching, Stator windings, synchronous machine

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