| 摘要 |
PROBLEM TO BE SOLVED: To lighten a magnet applied apparatus and to reduce the cost by driving a small number of permanent magnets fixed on a substrate by means of a rotating motor or a liner monitor or periodically exciting the electromagnets fixed the substrate with electronic control. SOLUTION: A small number of permanent magnets 2 are peripherally provided ion a rotating disk 1 and the rotating disk 1 is connected to the rotating motor 4 through a rotation shaft 3. A small number of permanent magnetic 2 are fixed on a sliding flat plate 5 and the sliding flat plate 4 is connected to the linear motor 7 through a sliding shaft 6. The permanent magnetic are replaced with the electromagnets and the electromagnets are periodically excited with electronic control. In the case of the movable magnets which are thus constituted, objects to be treated experience the change of a magnetic field for (50×number of magnets) times per second since the rotating motor 4 usually rotated 50 times per second. In the case of the sliding movable magnets, the objects experience the change of the magnetic field for (50×number of magnets×2) times per second within time when they pass the length of the sliding flat plate since the linear motor usually reciprocates 50 tines per second.
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