1results about How to "Strong work reliability" patented technology

The present application relates to the technical field of constant current control of stepping motor, and particularly relates to a constant current control system and control method of stepping motor based on FPGA, comprising: an FPGA unit for generating a PWM control signal; a power amplifier circuit unit for amplifying the PWM control signal converted by a level conversion unit to drive the stepping motor; the FPGA unit is also used for generating a driving signal; a differential driving circuit unit for differentiating the driving signal converted by the level conversion unit to drive a Hall angular displacement sensor; the Hall angular displacement sensor collects rotor position information of the stepping motor, which is received by a differential receiving circuit unit, transmitted to the level conversion unit and then transmitted to the FPGA unit, and the FPGA unit reads the rotor position information of the stepping motor in real time. The present application does not need current sampling and comparison and other hardware and software function modules, reduces the complexity of the control system, and enhances the open-loop control advantage of the stepping motor.