「眠リゴマ」の原理による無制御回転型磁気軸受 (<小特集>電磁力関連のダイナミックスと制御)

概要

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It is well known that magnetic levitation using permanent magnets without control is impossible. However, just as in the case of a sleeping top, if the body to be levitated has some amount of rotational velocity, the situation will be changed. In this paper, a new type of system which utilizes both the repulsion force of permanent magnets for vertical levitation and a null-flux coil system for horizontal restoring force is proposed. A method of decreasing the required radial restoring stiffness is given. Asymptotic stability of the top is discussed using eigenvalue analysis. Two different types of eddy current dampers for asymptotic stability are proposed. Some preliminary experimental results are also shown.
一般社団法人日本機械学会の論文
1992-12-25