Automatic feed control device with closed loop feedback by electric current of generator

The invention discloses an automatic feed control device fed back by a closed current loop of a motor, which comprise an SCM, a Hall current sensor, a bidirectional controlled silicon used for controlling on/off of a vibrator, an RC circuit connected with a control gate of the bidirectional controlled silicon and a solid state relay. The Hall current sensor is used for testing and converting motor current to a digital signal, and then the digital signal is compared with a standard value set in the SCM based on a fuzzy control theory and the SCM is utilized for generating pulse-width modulation signals and controlling on-off time of the solid state relay, thereby realizing the self-adaptive control of feeding. Simultaneously, a calibration function is designed for the automatic feed device and the standard value set in the SCM can be changed according to different application environments. The automatic feed control device can be widely applied to occasions of automatic feed controlled according to motor load,