Lancelot
"Generators are DC." Nope. All roatating generators have to be essentially AC. Voltage can only be generated by rate of change of magnetic flux. Un-modified, the result will always be an AC waveform.
"The armature is only a permanent magnet on simple machines." Agree and I said the same in my post.
"Rotational speed does not vary to alter the output voltage." Yes it can on a simple machine again as I said in my post.
"This is done by varying the magnetic field in the armature circuit. On an AC machine altering the rotational speed changes the frequency. (Hertz)" Think I said that as well.
Sorry if I appear a little touchy but you seem to have disagreed with everything I stated for no particular reason.
