A Magnetic Bearing Made With Permanent Magnets

In this video we show a passive magnetic bearing made with permanent magnets. It is a very basic structure similar to the ones used in actual motors with magnetic bearings.
The permanent magnets distributed in a half circle shape provide a suspension force to the rotor. Even though those magnets make the rotor levitate in a centered position, they are not able to provide damping to radial oscillations and cause unstable forces in the axial direction.
In this experiment, the rotor position is restricted by a mechanical contact, similar to the tip of a spinning top.

Видео A Magnetic Bearing Made With Permanent Magnets канала Tokyo Tech Chiba Lab東京工業大学 千葉研究室