Stepper Motor Subdivided Control System Based on SOPC Technology

A stepper motor subdivided control system based on SOPC (system on a programmable chip) technology is designed in this paper. Using the TFG (task flow graph) model, the system is designed to satisfy the requirement of some micromanipulation. The design method is based on the TFG model of the digital signal process algorithm and implemented with SOPC technology. As is known, stepper motor system consists of three parts which are control section, driver section and stepper motor. Under the analysis of the stepper motor subdivided principle which gives its precise control method, the architecture of the system and the practical driver circuit as the control circuit are provided. The Nios II CPU is selected for the SOPC system as the control core. The software flow process chart of the subdivided control according to the timing requirement of LMD18245 which is the driver chip for the stepper motor is also offered. In the end, the picture of the substance of the system is shown.