| 摘要 |
<p>A solenoid assembly (1) is disclosed, the solenoid having a first electro-magnet (9) for producing a first magnetic field. There is also movable element (3), in the form of a permanent magnet (4), with flux guides (7,8) to distribute the magnetic field, which moves within the magnetic field created by the electro-magnet. A second electro-magnet (11) may also- be included in the solenoid thereby creating a push-pull solenoid. The second electro-magnet is arranged so that its magnetic field acts in the opposite direction to the first electro-magnet by having its coils wound in the opposite direction.</p> |
