Development Of High Performance Control System For Stepping Motor

The advantages of stepping motor are regulating-rate, quickly rise-stop, positive-reverse controlling and brake etc by changing the frequency of pulse. The stepping motor opening-ring system is simple, cheap, stability and reliability, therefore its application is very extensive in many realm. It has great importance signification to develop high performance driver and control system of stepping motor.A high performance driver and control system of stepping motor has been developed. The system adopts the PC as master computer and the single-chip as slave computer. Control instructions and parameter have been delivered from the master computer to slave computer dependently and smoothly in order to guarantee the work that can be accurately and promptly done. Besides, the host computer collects various kinds of state signal that the slave computer feedbacks to diagnose and manipulate.A step motor subdivision driver of constant frequency PWM is developed based on CPLD and MOSFET, so running performance of stepping motors is improved greatly. Not only has it improved the stability in low frequency and the torque-speed characteristic in high frequency,but can it utilize energy availably. It has been proved that the driver has nice adaptability, stability, reliability and self-protection ability.The principle of EPP is introduced, and a step motor controller has been developed successfully with the EPP technology. In addition,the communication circuit of master computer, the hardware circuit of slave computer and system software have been finished. It has been proved that the control system has high transport rate, nice Real-time control, high reliability, convenient man-machine conversation.The step motor position-control, add and subtract rate control,figure function, man-machine dialogue function etc have been realized in the system. In addition,it has wide adaptability for the controlling system to use modularization design.