NDLI: Vibration Suppression in High- <inline-formula> <tex-math notation=TeX>${rm T}_{rm c} $</tex-math></inline-formula> Superconducting Levitation System Utilizing Nonlinearly Coupled Electromagnetic Shunt Damper

Content Provider	IEEE Xplore Digital Library
Author	Sasaki, M. Kimura, J. Sugiura, T.
Copyright Year	2002
Description	Superconducting levitation systems have been considered as a promising technology for implementing high-speed transport systems. A superconducting levitation system can levitate a magnet without active feedback control. However, due to the system's low damping and nonlinearity, large-amplitude nonlinear vibration can easily occur. Although an electromagnetic shunt damper can suppress the vibration without contact by transforming the vibrational kinetic energy into electrical energy, the inductance value of the damper often becomes too large to realize practically. Therefore, we propose a new type of electromagnetic shunt damper that is nonlinearly coupled with the levitated body, and its value of inductance can be reduced to one-fourth the conventional one. First, we evaluate the levitation force via the advanced mirror image method. Next, we perform numerical calculation via the Runge–Kutta method and nonlinear analysis via the method of multiple scales. We obtain the system's frequency responses via both these methods. From the results, we observe that internal resonance can occur and the proposed electromagnetic shunt damper can reduce the vibration amplitude.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1
Ending Page	5
Page Count	5
File Size	569197
File Format	PDF
ISSN	10518223
Volume Number	25
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Shock absorbers Superconducting magnets Vibrations Magnetic levitation Magnetic flux Magnetomechanical effects Force Electromagnetic coupling High-temperature superconductors Nonlinear dynamical systems
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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