CONTROLLING THE SPEED OF AN ELEVATOR

摘要

The speed of an elevator is controlled and adjusted by utilizing a differential voltage obtained from a variable voltage indicating actual speed and a control voltage reflecting an ideal curve of speed variation. The resulting voltage or reference curve has a series of straight sections corresponding to distance lengths decoded from a distance counter for the distance travelled from the giving of a slowing order at a fixed distance from the stopping point. Each control section has it origin realigned with the reference curve.