Constant current chopping subdivision driver of stepper motor applied in harsh environment

According to the special requirements of aerospace electronic products, this paper gives a designation of constant current subdivision driver of step motor based on the FPGA. In this design, the subdivision of the Sine/Cosine waveform is used to control current waveform, while the comparison of the feedback current and control current implements the function of constant current control. The design has some advantages such as stable output torque, low noise and vibration at low speed, short time in positioning and small possibility of losing step.