Otto, the charging current from an alternator is created in the stator, the stationary winding in the large diameter fixed frame. Look at a real alternator- - - -the frame is a wide open design with lots of air flowing over the wiring. The rotor creates a spinning magnetic field that sweeps over the stator. Generators spin the current creating conductors with the armature, and create magnetism with the stationary field coils,. A generator makes the charge current in the armature, the rotating part, and there's a fan built in to create a wind tunnel effect through the housing. Reversing the concept by mounting the stator in an enclosed housing without adequate cooling so it looks like a generator doesn't make good nonsense.
Jerry
