TY - JOUR
T1 - Vibration reduction of a rotating machinery by magnetic damper with rotating circular magnet (nonoccurrence of an unstable vibration caused by magnetic damping force)
AU - Takayama, Yoshihisa
AU - Sueoka, Atsuo
AU - Kondou, Takahiro
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2004/8
Y1 - 2004/8
N2 - The magnetic damping force is generated by not only a rotating-conductor- type magnetic damper composed of a rotating conductor and a fixed magnet but also a rotating-magnet-type magnetic damper composed of a rotating magnet and a fixed conductor. In the previous report, it was demonstrated analytically and experimentally that a rotating conductor-type magnetic damper for a rotating machine caused unstable vibrations at a rotating speed over the critical speed. In this report, the authors show that the rotation of the axisymmetric magnet on its axisymmetric axis affects the magnetic damping force very slightly by a simple experiment, and that a rotating-magnet-type magnetic damper for a rotating machine can be modeled by considering the whirling of the magnet only. As the resit, the rotating-magnct type magnetic damper never generates unstable vibrations analytically. The analytical results agree well with the experimental ones.
AB - The magnetic damping force is generated by not only a rotating-conductor- type magnetic damper composed of a rotating conductor and a fixed magnet but also a rotating-magnet-type magnetic damper composed of a rotating magnet and a fixed conductor. In the previous report, it was demonstrated analytically and experimentally that a rotating conductor-type magnetic damper for a rotating machine caused unstable vibrations at a rotating speed over the critical speed. In this report, the authors show that the rotation of the axisymmetric magnet on its axisymmetric axis affects the magnetic damping force very slightly by a simple experiment, and that a rotating-magnet-type magnetic damper for a rotating machine can be modeled by considering the whirling of the magnet only. As the resit, the rotating-magnct type magnetic damper never generates unstable vibrations analytically. The analytical results agree well with the experimental ones.
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U2 - 10.1299/kikaic.70.2195
DO - 10.1299/kikaic.70.2195
M3 - Article
AN - SCOPUS:8344221971
VL - 70
SP - 2195
EP - 2202
JO - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
JF - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
SN - 0387-5024
IS - 8
ER -