Introduction To Stepper Motors

Stepper motors are micro motors that convert electrical pulse signals into angular displacement to control the rotation of the rotor. They are used as actuators in automatic control devices. Each time a pulse signal is input, the stepper motor moves forward, so it is also called a pulse motor. Stepper motors are mostly used in external devices of digital computers, as well as printers, plotters, disks and other devices.
The driving power supply of a stepper motor consists of a variable frequency pulse signal source, a pulse distributor and a pulse amplifier, from which the driving power supply provides pulse current to the motor winding. The operating performance of a stepper motor is determined by the good coordination between the motor and the driving power supply.
The advantages of stepper motors are no cumulative error, simple structure, easy use and maintenance, low manufacturing cost, large ability to drive load inertia, and are suitable for small and medium-sized machine tools and places where speed accuracy is not required. The disadvantages are low efficiency, high heat generation, and sometimes "out of step".