Detailed explanation of the principle frame of the stepper motor driver
Stepper motors have a wide range of applications in control systems. It can convert pulse signals into angular displacements and can be used as electromagnetic brake wheels, electromagnetic differentials, or angular displacement generators.
Sometimes stepper motors that are removed from some old equipment (which are generally not damaged) should be used for other purposes. Generally, you need to design your own drive. This article describes the driver designed for a stepper motor that was removed from a Japanese-made printer. This article first introduces the working principle of the stepper motor, and then introduces the software and hardware design of its driver.
1. Working principle of stepper motor
The stepping motor is a four-phase stepping motor and is powered by a unipolar DC power supply. As long as the phase windings of the stepper motor are energized at the appropriate timing, the stepper motor can be stepped. FIG. 1 is a schematic diagram of the working principle of the four-phase reaction type stepping motor.