抄録
The damping force of the magnetic damper in this paper is based on Lorentz force by Fleming's left-hand rule. That is to say, the force acts on the conductor in the opposite direction of the movement of the conducting disk. Generally, a magnetic damper has a weak point that damping performance is relatively weak. In the present work, we propose Halbach magnet array or another magnet array system to apply to the higher performance magnetic damper. In the case of Halbach magnet array, the five cubic magnets are glued in the different special direction of the magnetic pole each other. We fabricated the magnetic damper using one Halbach magnet array made of 5 ferrite magnet cubes and calculated damping ratios experimentally, and compared them with analytical results. As a result, it was found that we need to use plural Halbach magnet array or special magnet array made of neodymium magnets in order to gain the higher damping ratios.
