IP core design of PWM controller for stepper motor speed-up and speed-down based on SOPC

OU Hai-ping, ZHOU Yan-jiang, ZHANG Hua-ye, ZHUANG Meng-meng
(Faculty of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China)

Abstract: In order to solve the problems of controlling acceleration and deceleration process of stepper motor motion system, the technology of pulse width modulation（PWM）and field programmable gate array (FPGA) IP core was investigated. A kind of PWM controller IP core for stepper motor speed-up and speed-down based on system on programmable chip (SOPC) was proposed, and then the design thought and realization way were illustrated. HDL hardware description language was used to prepare logic functions，Avalon bus interface and external I/O circuit, and the whole design process was described. The function of the design was tested and verified by Alteras Cyclone board. Simulation and experiment results show that the IP core can be applied in different stepper motor control system drivered by monopulse signal and the operation is stable.
Key words: system on programmoble gate away(SOPC); stepper motor; IP core; pulse width modulation(PWM); speed-up and speed-down; Avalon bus interface; field programmable gate array(FPGA)