| 摘要 |
A magnetic substance holding device, according to an embodiment of the present invention, comprises: a first pole piece assembly that includes a first N-pole piece, a first S-pole piece, and a first permanent magnet; a second pole piece assembly that includes a second N-pole piece, a second S-pole piece, and a second permanent magnet; at least one first coil; at least one second coil; and a control unit that controls a current applied to the first and second coils, wherein one or more of the first and second pole piece assemblies are configured to be movable for conversion between a first arrangement and a second arrangement, wherein in the first arrangement, the contact surfaces of the first N-pole piece and the second S-pole piece are separated from each other, and the contact surfaces of the first S-pole piece and the second N-pole piece are separated from each other, and in the second arrangement, the contact surfaces of the first N-pole piece and the second S-pole piece are brought into contact with each other, and the contact surfaces of the first S-pole piece and the second N-pole piece are brought into contact with each other. The control unit adjusts a current applied to the first and second coils to control magnetic flux that passes through the first and second coils, thereby enabling the first and second pole piece assemblies to be converted from the first arrangement to the second arrangement and vice versa and accordingly, controlling magnetic flux that passes through holding surfaces of the first and second pole piece assemblies. |
