Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 2195-2202 |
| Number of pages | 8 |
| Journal | Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C |
| Volume | 70 |
| Issue number | 8 |
| Publication status | Published - Aug 2004 |
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All Science Journal Classification (ASJC) codes
- Mechanical Engineering
Cite this
Vibration reduction of a rotating machinery by magnetic damper with rotating circular magnet (nonoccurrence of an unstable vibration caused by magnetic damping force). / Takayama, Yoshihisa; Sueoka, Atsuo; Kondou, Takahiro.
In: Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, Vol. 70, No. 8, 08.2004, p. 2195-2202.Research output: Contribution to journal › Article
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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
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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M3 - Article
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 -