10-04-2017, 07:48 PM
A stepper motor is stepped from one position to the next by changing the currents through the fields in the motor. The two common field connections are referred to as two phase or four phase. There are three main areas of applications for stepper motor. i. Instrumentation ii. Computer peripherals ii. Machine drives.They are used in floppy drives, dot-matrix printers, X-Y plotters, digital watches
etc to rotate things in steps of small angles. The step size in typical stepper motor varies from .
A stepper motor is a device used to obtain an accurate position control of rotating shafts. A stepper motor employs rotation of its shaft in terms of steps, rather than continuous rotation as in case of AC or DC motors. To rotate the shaft of the stepper motor, a sequence of pulses is needed to be applied to the windings ofthe stepper motor, in proper sequence. The number of pulses required for one complete rotation of the shaft of the stepper motor are equal to its number of internal teeth on its rotor. The stator teeth and the rotor teeth lock with each other to fix a position of the shaft. With a pulse applied to the winding input, the rotor rotates by one teeth position or an angle x.The angle x may be calculated as. x =360 /no. of rotor teeth.