Dynamo

—A machine for converting energy in the form of mechanical power into energy in the form of electric currents, by means of electromagnetic induction. The dynamo in its simplest form consists of: (1) an armature, which in revolving induces electromotive forces in the copper conductor wound upon it; (2) a field magnet, which provides a field of magnetic lines, to be cut by the armature conductors as they revolve; (3) the pole pieces; (4) the commutator or collector; (5) the collecting brushes that rest on the commutator cylinder and take off the current of electricity oe by the machine. Dynamos are cla ied as (1) direct current dynamos, and (2) alternating current dynamos. Those of the first cla are subdivided with respect to their winding, as: (1) series wound; (2) shunt wound; (3)compound wound; each type having its particular usage.