Design optimization of air-ducts in rotating machines with high power density

T. Onuki*, S. Wakao, J. W. Im, H. Takahashi, T. Miyokawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Recently, the request for the compactness of rotating machines such as traction motors has been increasing and thus the rotating machines should be of high power density. The compactness of motors makes the problem of the magnetic saturation more serious. With this background, this paper describes the design optimization of air-ducts in induction motors. By investigating the relationship between the rotor-yoke configuration with air-ducts and the magnetic flux density in the air-gap, we determine the desirable air-ducts arrangement. Some numerical results, which demonstrate the validity of the proposed approach, are also presented.

Original languageEnglish
Pages (from-to)2853-2856
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number5 PART 1
Publication statusPublished - 1998


  • Air-duct
  • Design optimization
  • Hybrid fe-be method
  • Magnetic saturation
  • Rotating machines
  • Space harmonics

ASJC Scopus subject areas

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


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