TY - JOUR
T1 - Experimental Study on Oscillation Amplitude Reduction of a Superconducting Levitation System by an Electromagnetic Shunt Damper
AU - Uchino, Keisuke
AU - Sugiura, Toshihiko
N1 - Funding Information:
Manuscript received October 31, 2018; accepted March 10, 2019. Date of publication March 12, 2019; date of current version April 2, 2019. This work was supported in part by the Tsugawa Foundation. (Corresponding author: Toshihiko Sugiura.) The authors are with the Keio University, Yokohama 223-8522, Japan (e-mail:, 0829@keio.jp; sugiura@mech.keio.ac.jp). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2019.2904676
Publisher Copyright:
© 2002-2011 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - In this paper, we propose a new type of electromagnetic shunt damper where an air core coil is set above a floating magnet in a superconducting levitation system. The coil is connected to a shunt circuit consisting of a capacitance and a resistance. We have derived the optimal parameter values of capacitance C and resistance R from the fixed point theory after linearizing the governing equations and experimentally confirmed the effectiveness of the damper. We have also confirmed the electromagnetic coupling coefficient, which couples the mechanical system and the electric system and can be treated as a constant; as it is enhanced by the presence of the superconductor. Further, we have oscillated the superconductor and observed the amplitude of the floating magnet with and without the shunt damper. By the result, we have confirmed effective amplitude reduction by the shunt damper.
AB - In this paper, we propose a new type of electromagnetic shunt damper where an air core coil is set above a floating magnet in a superconducting levitation system. The coil is connected to a shunt circuit consisting of a capacitance and a resistance. We have derived the optimal parameter values of capacitance C and resistance R from the fixed point theory after linearizing the governing equations and experimentally confirmed the effectiveness of the damper. We have also confirmed the electromagnetic coupling coefficient, which couples the mechanical system and the electric system and can be treated as a constant; as it is enhanced by the presence of the superconductor. Further, we have oscillated the superconductor and observed the amplitude of the floating magnet with and without the shunt damper. By the result, we have confirmed effective amplitude reduction by the shunt damper.
KW - Electromagnetic shunt damper
KW - amplitude reduction
KW - electromagnetic coupling
KW - fixed point theory
KW - high-temperature superconductors
KW - suppression
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U2 - 10.1109/TASC.2019.2904676
DO - 10.1109/TASC.2019.2904676
M3 - Article
AN - SCOPUS:85064069636
SN - 1051-8223
VL - 29
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 5
M1 - 3602704
ER -