Servo driver and overshoot-free current loop circuit thereof

The invention provides a servo driver and a non-overshoot current loop circuit thereof, the non-overshoot current loop circuit comprises three current loops which are arranged in the servo driver and respectively correspond to a U phase, a V phase and a W phase of a servo motor, and each current loop comprises an actual current feedback module, an instruction current conversion module, a current comparison module and an MOSFET switch module; the actual current feedback module is connected with the current output end of the corresponding phase and the first input end of the current comparison module; the instruction current conversion module is connected with the upper controller of the servo motor and the second input end of the current comparison module; the current comparison module is connected with the first input end of the MOSFET switch module and the voltage input end of the corresponding phase of the servo motor. According to the servo driver, the current loop of pure hardware is adopted, through mutu