円形磁石回転型磁気ダンパによる回転体の制振効果 : 磁気ダンピング力に起因した不安定振動の不発生(機械力学,計測,自動制御)

概要

論文の詳細を見る
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 reslt, the rotating-magnet-type magnetic damper never generates unstable vibrations analytically. The analytical results agree well with the experimental ones.
社団法人日本機械学会の論文
2004-08-25