Study of FPGA technology applied for stepping motor subdivision drive

Limited by the manufacture technics, the stepping motor has big step angles and low frequency vibration, and can only be applied to those situations with low demand. This paper designs a method to realize subdivision drive for the stepping motor based on FPGA chip. Firstly, PWM control waveform data table are stored in embedded memory module of FPGA. Secondly, multiple PWM control signals are produced by the digital comparator synchronously. Finally, we realize subdivision control for the step angles of stepping motor. Test result shows that the stepping motor subdivision drive technology can decrease the stepping angle of stepping motor, improve the stabilization and flexibility and has preferable practical value.