Examination of optimal design of IPM motor using ON/OFF method

Norio Takahashi, Takaya Yamada, Daisuke Miyagi

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


The topology optimization by distributing the magnetic material in the design domain, which is called as the ON/OFF method, is attractive for designers of magnetic devices, because an initial conceptual design, that we could not imagined beforehand, may be obtained. We examined how to apply the ON/OFF sensitivity method to the IPM (Interior Permanent Magnet) motor in order to determine the optimal topology of the rotor. A technique to apply the ON/OFF method to the design of motor considering the nonlinearity of B-H curve and rotation of rotor is shown. The effects of the choice of the design region and the phase angle of stator current on the obtained topology of motor core are discussed.

Original languageEnglish
Article number5512851
Pages (from-to)3149-3152
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number8
Publication statusPublished - 2010 Aug


  • Adjoint variable method
  • IPM motor
  • finite-element analysis
  • topology optimization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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