Effect of shrink fitting and cutting on iron loss of permanent magnet motor

N. Takahashi, H. Morimoto, Y. Yunoki, Daisuke Miyagi

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Magnetic properties of a motor core are affected by the distortion due to the compression caused by shrink fitting and the distortion caused by punching, etc. In this paper, the B-H curve and iron loss of stator core of actual motor under shrink fitting are measured. It is shown that the maximum permeability is reduced by about 50%, and the iron loss is increased by about 30% due to the shrink fitting. It is illustrated that the loss of motor is increased by about 10%, 4% and 2% due to the shrink fitting, the cutting stress and the eddy current in rotor magnet, respectively.

Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Issue number20
Publication statusPublished - 2008 Oct 1


  • Finite element method
  • Iron loss
  • Permanent magnet motor
  • Shrink fitting

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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