A research of a new technique on hardware implementation of control algorithm of high-subdivision for stepper motor

This paper designs a new control system of high-subdivision for a stepper motor. through which integrated controller and driver of stepper motor on a FPGA chip. The problem of high-subdivision stepping angle is solved by using the technique of FPGA hardware at controllers and drivers of stepper. The number of subdivision can reach 4096, and the step pitch angle be automatically adjusted. This system has also established a PWM generator, a PI controller and a microprocessor IP core, that may further be used of making control chip of stepper motors. Product with the same function, at present, which has this great performance has not been seen in any report. Experimental results indicate that the technique could improve the resolution of a stepper motor and make it run more smoothly.