Permanent magnet motors are widely used, both in low power applications and in very powerful machines. Because of their simple construction they were developed at the beginning of the last century.
Permanent magnet electric motors are powered exclusively with direct current: for this reason the name “DC motors” is widely used.
IME’s permanent magnet motors have the rotating part made by a copper wound armature. The magnetic field is formed by permanent magnets attached to a steel tube. Power is supplied through the graphite brushes, directly to the commutator. By reversing the polarity to the commutator the direction of the motor rotation is reversed.