rotor of stepper motorThe rotor is made up of a permanent magnets - TopicsExpress

rotor of stepper motorThe rotor is made up of a permanent magnets core with two soft iron discs with teeth on the periphery. The number of teeth decides the step angle of the motor. The teeth on the front disk form the permanent magnetic south poles whereasthe teeth on the rear disk form the permanent magnet north poles. The overall structure looks like a pair of gears stick to each other. The alignment of the teeth is done in such a manner that the teeth on one disc are positioned between the space in the two consecutive teeth on the other disc and vice versa.