| 摘要 |
The invention relates to a continuous rotation or a multi-position actuator. The continuous rotation armature has at least two poles spaced apart from the armature and a third pole that is adjustable in distance from the armature. The multi-position actuator comprises a housing, an armature rotatably mounted in the housing, and a series of poles journaled around the armature. There is also a stop arm attached to the armature, which stops the rotation of the armature when the stop arm hits an adjacent stop. These stops are positioned within the housing to limit the rotation of the armature. This multi-position actuator is designed to form either a fail safe actuator or a latching actuator by adjusting the spacing of the air gap between the poles and the armature. The fail safe actuator is designed so that the stop arm attached to the armature is positioned between the stops when the poles are not charged. However, when the poles are charged, the armature rotates so that the stop arm turns to contact one of the adjacent stops. When power is removed, the armature rotates back to its original position with the stop arm being positioned between the two stops. The latching actuator is designed so that the armature may be positioned at one of three different positions and then remain there when no power is applied to the poles. However, when power is applied to the poles, the armature rotates to the designated position and remains there even after power has been removed.
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