Lifting machine protection detector of overrunning

The utility model provides a lifting machine protection detector of overrunning, the utility model belongs to the technical field of the instrument and equipment, it detects the overrun instrument ofprotective capability of lifting machine especially to involve one kind. Including the lifting machine encoder, characterized by still includes motor, speed simulator, the control unit. The utility model discloses can bring following beneficial effect: the speed simulator couples together motor and encoder, and directly simulate goes out the rotation condition of lifting machine during operation encoder to will you please this observe the lifting machine and overrun protection device and accomplish the control to lifting machine speed. The waste of electric power and the unneccessary loss of lifting machine have been stopped in the work that this design needs whole lifting machine not stop when having avoided testing the lifting machine in the past and overrunning protect function to the speed condition through th