Permanent magnet motors are widely used, both in small power applications and in high power machines. In the permanent magnet motors of DB Elettrotecnica, the rotating part consists of a rotor wound by copper conductors with termination to the commutator. The part that generates the fixed magnetic field is instead composed of a tube and permanent magnets. The feeding takes place, through the graphite brushes, directly to the manifold. By reversing the polarity to the commutator, we obtain the inversion of the rotation direction of the motor.