A Combination Resonance of an Excited Rotor with a Nonuniform Magnetization Distribution Supported by a Superconductive Magnetic Bearing

Koki Ochiai, Hirotaka Ishii, Toshihiko Sugiura

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This paper reports a unique resonance phenomenon that can occur when a superconductive magnetic bearing with nonuniform magnetization distribution is forced to vibrate in a single direction. The dynamics are studied by deriving the equations of motion, and a unique resonance is predicted both theoretically and numerically. A simple experiment is also conducted. The results show that a combination resonance can occur when the difference between the rotation frequency and the vibration frequency is equal to the natural frequency of the rotor.

Original languageEnglish
Article number8666801
JournalIEEE Transactions on Applied Superconductivity
Issue number5
Publication statusPublished - 2019 Aug 1



  • high-temperature superconductors
  • nonlinear dynamical systems
  • Permanent magnets
  • rotors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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