This Because power transferred into the field circuit is much less than in the armature circuit, AC generators nearly always have the field winding on the rotor and the stator as the armature winding. Only a small amount of field current must be transferred to the moving rotor, using slip rings. Direct current machines dynamos require a commutator on the rotating shaft to convert the alternating current produced by the armature to direct current, so the armature winding is on the rotor of the machine. -793 Page Last Reviewed or Updated: June 17, 2011 "home energy audit seattle " and "electric motor magnetism " (include "home energy direct ni", "new house electricity ", "home energy audit nova scotia ", "magnetic motor italy ", "how to build a windmill for kids ", "Perendev magnetic motor wiki ", Frequent power outages and later rate hikes has made solar energy solution & Kawai magnetic motor )