Escalator braking with multiple deceleration rates

摘要

A braking system for an escalator having multiple rates of deceleration. When electrical protective devices (EPD) indicate that the escalator should be stopped, the main controller makes a determination as to whether the maximum rate of deceleration should be applied or the lower rate of deceleration. The brake is then controlled according to this determination to prevent a sudden stopping of the escalator when it is not necessary. The EPDs may be divided into two or more groups for different rates of deceleration. A provision may be made for multiple signals at once. If the main controller fails to provide a deceleration rate, the braking controller automatically defaults to the maximum rate. This system may also be used with moving walkways or other conveyors.