Electronic speed limiter of elevator

The electronic speed governor comprises a rotating shaft, the rotating shaft is rotationally connected to a lift car (1), the lift car (1) converts linear movement of the lift car (1) into rotating movement of the rotating shaft through a transmission structure, when the lift car (1) moves up and down, the rotating shaft is driven to rotate, and the rotating speed of the rotating shaft is detected through a speed measuring sensor; the speed measurement sensor transmits a detected electronic signal to the speed governor controller, and the speed governor controller is provided with a speed set value; the speed measurement sensor compares a detected electronic signal with a speed set value of the speed governor controller, and the electromagnetic safety tongs are triggered to act once the detected electronic signal exceeds the set value, so that the lift car is braked. The electronic speed governor replaces a mechanical speed governor, the up-and-down lifting motion of the lift car is converted into rotation of