| 摘要 |
<p>An actuating mechanism for a sliding door driven by a linear motor comprising a slidable bar coupled to the door, for moving the door into closed and open positions, and a dual stator having the stacks thereof disposed on each side of the bar. A three-phase ac and a dc field winding are disposed in the stator for generating a traveling field for moving the sliding bar and a braking field for reducing the velocity of the movement thereof, respectively. The improvement comprises the provision of a first sequential switching means, responsive to movement of the slidable bar, for selectively energizing the dc field winding and generating the braking field as the door is moved from one of its positions to the other by the traveling field. A second sequential switching means, which is responsive to movement of the bar, deenergizes both the ac and dc field windings, and terminates the traveling and braking fields, when the door is moved into its closed and open positions by the bar.</p> |
