Effect of Parameters of an Electromagnetic Shunt Damper on Whirling Amplitude Reduction of a Rotor Supported by a Superconducting Magnetic Bearing

Masahiko Sasaki, Toshihiko Sugiura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A superconducting magnetic bearing can levitate a rotor without contact. However, the rotor can whirl with large amplitude. To reduce the whirling amplitude, we focused on an electromagnetic shunt damper that is appliable to a rotor system. In this paper, an analysis considering influence of magnetic flux density distribution on dynamics of the rotor was carried out. From linearized and nondimensionalized governing equations, we obtained one parameter that determines the damper's effectiveness. Further, numerical calculation was performed and the optimum value concerning the dimensions of the electromagnetic shunt damper was obtained.

Original languageEnglish
Article number7817826
JournalIEEE Transactions on Applied Superconductivity
Volume27
Issue number4
DOIs
Publication statusPublished - 2017 Jun 1

Fingerprint

magnetic bearings
Magnetic bearings
dampers
shunts
rotors
Rotors
electromagnetism
Magnetic flux
magnetic flux
density distribution
flux density

Keywords

  • Electromagnetic coupling
  • high-temperature superconductors
  • magnetic levitation
  • nonlinear dynamical systems
  • vibrations

ASJC Scopus subject areas

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

Cite this

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abstract = "A superconducting magnetic bearing can levitate a rotor without contact. However, the rotor can whirl with large amplitude. To reduce the whirling amplitude, we focused on an electromagnetic shunt damper that is appliable to a rotor system. In this paper, an analysis considering influence of magnetic flux density distribution on dynamics of the rotor was carried out. From linearized and nondimensionalized governing equations, we obtained one parameter that determines the damper's effectiveness. Further, numerical calculation was performed and the optimum value concerning the dimensions of the electromagnetic shunt damper was obtained.",
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N2 - A superconducting magnetic bearing can levitate a rotor without contact. However, the rotor can whirl with large amplitude. To reduce the whirling amplitude, we focused on an electromagnetic shunt damper that is appliable to a rotor system. In this paper, an analysis considering influence of magnetic flux density distribution on dynamics of the rotor was carried out. From linearized and nondimensionalized governing equations, we obtained one parameter that determines the damper's effectiveness. Further, numerical calculation was performed and the optimum value concerning the dimensions of the electromagnetic shunt damper was obtained.

AB - A superconducting magnetic bearing can levitate a rotor without contact. However, the rotor can whirl with large amplitude. To reduce the whirling amplitude, we focused on an electromagnetic shunt damper that is appliable to a rotor system. In this paper, an analysis considering influence of magnetic flux density distribution on dynamics of the rotor was carried out. From linearized and nondimensionalized governing equations, we obtained one parameter that determines the damper's effectiveness. Further, numerical calculation was performed and the optimum value concerning the dimensions of the electromagnetic shunt damper was obtained.

KW - Electromagnetic coupling

KW - high-temperature superconductors

KW - magnetic levitation

KW - nonlinear dynamical systems

KW - vibrations

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