A commutated DC motor has a set of rotating windings wound on an armature mounted on a rotating shaft. The shaft also carries the commutator, a long-lasting rotary electrical switch that periodically reverses the flow of current in the rotor windings as the shaft rotates. Thus, every brushed DC motor has AC flowing through its rotating windings. Current flows through one or more pairs of brushes that bear on the commutator; the brushes connect an external source of electric power to the rotating armature. COUNT 4
QSN1 What does the communicator do? ANS1 reverses the flow of current in the rotor windings QSN2 What type of current is featured in brushed DC motors? ANS2 AC QSN3 Where do brushes get their power? ANS3 external QSN4 What is the main feature of the shaft in a commutated DC motor? ANS4 rotating