Today we will discuss the stepper motor, its working, types, advantages, disadvantages with its functional area. In simple words, it is a combination of DC motor with electronics technology that allows the motor to rotate and stop at a specified angle. It is mostly used in robotics where move the arm of robots at a specified angle and hold there for some time and get back return after it.
This is a brushless electromechanical device that is used to convert the series of electric pulses applied at their excitation winding into precisely defined step-by-step mechanical shaft rotation. In other words, the stepper motor is an electromechanical device that converts electrical power into mechanical power.
It is a particular type of DC motor that does not rotate continuously, but a full rotation is divided into a number of equal steps. It works on the principle that, the theory of operation for magnets to make the shaft turn the precise distance when a pulse of electricity is provided.
In a stepper motor, a number of input as pulses given to the motor decides the steps angle, and hence the position of the shaft is controlled by controlling the number of pulses. These unique features that are different from the servo motor make the stepper motor to be well suitable for an open-loop control system wherein the precise position of the shaft is maintained with the exact number of the pulses without using a feedback sensor.
If the steps angle is smaller, then the greater will be the number of the stepper revolution and higher would be the accuracy of the position obtained.