An elevator (lift in British English) is a unique vertical transport machinery that smoothly carries people or goods between floors (levels, decks) of a building, vessel, or other structure. Elevators are generally powered by electric motors. They either drive traction cables or counterweight systems like a hoist. or pump hydraulic fluid to raise a cylindrical piston like a jack.
In agriculture and manufacturing, an elevator is any type of conveyor device used to lift materials in a continuous stream into bins or silos. Several types exist, such as the chain and bucket elevator, grain auger screw conveyor using the principle of Archimedes’ screw, or the chain and paddles or forks of hay elevators.
AIMS OF THE CONTROL SYSTEM
The main aims of the elevator control system are:
* To bring the lift car to the correct floor.
* To minimize travel time.
* To maximize passenger comfort by providing a smooth ride.
* To accelerate, decelerate and travel within safe speed limits.