Back to results
US 8,746,411 B2Granted
Elevator car positioning including gain adjustment based upon whether a vibration damper is activated
AssigneeOtis Elevator Company
InventorsRandall Keith Roberts, Leandre Adifon
Life of this patent
Estimating the term…
Abstract
An exemplary method of controlling elevator car position includes determining that an elevator car requires re-leveling and determining whether a vibration damper is activated. A gain for controlling operation of a motor responsible for moving the elevator car for the re-leveling is adjusted if the vibration damper is activated.
Claims19
A method of controlling elevator car position, comprising:
- determining that an elevator car requires re-leveling from a current vertical position to a desired vertical position;
- determining whether a vibration damper is activated;
- and
- adjusting a gain for controlling operation of a motor responsible for moving the elevator car for the re-leveling if the vibration damper is activated.
1 more element
An elevator positioning system, comprising:
- a vibration damper that is configured to resist vertical movement of an associated elevator car;
- and
- a controller device for controlling a motor configured to move the associated elevator car vertically along a hoistway, the controller device having a gain with a set value, the controller device being configured to selectively adjust the gain from the set value during a re-leveling of the associated elevator car from a current vertical position to a desired vertical position if the vibration damper is activated.
Dependencies are inferred from the claim text.