| 摘要 |
The electrically operated actuator comprises a box-shaped body to which an angularly movable rocking arm is pivotally connected; the actuator also comprises control means operatively connected to the rocking arm by a toggle-lever mechanism, the control means in turn comprising at least one electric motor, and a connecting screw-nut mechanism. The actuator further comprises a position transducer device of rotary and absolute type, providing reference signals univocally related to the angular positions of the rocking arm, and a programmable electronic control unit and self-braking means for the electric motor, the control unit being programmed to control the angular rotation of the rocking arm and to actuate the self-braking means for the electric motor, in relation to the control signals provided by the absolute transducer device.
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