A stepper motor driver is an actuator that converts electrical pulses into angular displacement. When a stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle in a predetermined direction.(Step Angle)Its rotation operates step by step at a fixed angle. The angular displacement can be controlled by adjusting the number of pulses, achieving precise positioning; at the same time, the speed and acceleration of the motor can be controlled by adjusting the pulse frequency, thereby achieving speed regulation and positioning.

Stepping motors and stepping motor drivers make up a stepping motor drive system. The performance of the stepping motor drive system not only depends on the performance of the stepping motor itself but also on the quality of the stepping motor driver. Research on stepping motor drivers has been nearly concurrent with the study of stepping motors.