Experimental tests and efficiency improvement of surface permanent magnet magnetic gear

Michinari Fukuoka, Kenji Nakamura, Osamu Ichinokura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Magnetic gears offer several advantages against conventional mechanical gears such as easy maintenance, low vibration and acoustic noise, and high reliability. For the practical application of magnetic gears, experimental studies on gear characteristics that consider real manufacturing constraints should be performed. This paper presents the loss analysis, experimental tests, and performance improvement of a surface permanent magnet (SPM) magnetic gear. The torque characteristic and the efficiency of the SPM magnetic gear were calculated using finite element analysis (FEA). Experiments were performed on a trial magnetic gear. The FEA and experimental results demonstrated the improved efficiency of the trial gear. The maximum efficiency of the improved gear was over 96%.

Original languageEnglish
Pages (from-to)62-67
Number of pages6
JournalIEEJ Journal of Industry Applications
Issue number1
Publication statusPublished - 2014


  • Eddy current loss
  • Experimental tests
  • Finite element analysis (FEA)
  • Loss analysis
  • Magnetic gear

ASJC Scopus subject areas

  • Automotive Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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