Vibration suppression in high-Tc superconducting levitation system utilizing nonlinearly coupled electromagnetic shunt damper

Masahiko Sasaki, Junki Kimura, Toshihiko Sugiura

研究成果: Article査読

8 被引用数 (Scopus)


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.

ジャーナルIEEE Transactions on Applied Superconductivity
出版ステータスPublished - 2015 6 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学


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