a step a driven sprocket connected to the brake sprocket through a brake chain to operate in conjunction with the brake sprocket an electronic clutch that controls a connection between the driven sprocket and a transmission gear a brake motor of which the central shaft is rotated by the transmission gear a plurality of switching means connected to a plurality of winding wires that are stators of the brake motor and a controller for supplying an operating pulse to a selected switching means therefore when there is an abnormality in an escalator it is possible to stop a step at a low speed according to an operating pulse supplied by the controller thereby stably stopping riders standing on the step and thus protecting the riders application_number US 201515317062 A description a low speed brake apparatus for an escalator includes a brake sprocket installed on a driving shaft wherein step sprockets engaged with step chains and a driving sprocket are respectively installed on both sides of the driving shaft and a driving chain inserted into the rotation shaft of a driving motor rotates the driving sprocket so that a step is driven a follower sprocket connected to the brake sprocket by a brake chain in such a way as to operate in conjunction with the brake sprocket an electronic.