Permanent Magnet Stepper Motors

Permanent magnet (PM) stepper motors provide incremental positioning capabilities and excellent zero speed holding torque in a cost-effective package.  Step motors are used in many different applications that require accurate positioning and/or speed control.  The number and frequency of input pulses control the respective rotational position and speed of a stepper motor by moving the motor in small rotational increments, called steps.  PM Stepper motors consist of a permanent magnet rotor inside of a stator housing that contains the phase windings of the motor which create the rotating electromagnetic field that rotates the rotor.