There does seem to be a bit of confusion about which generator you are looking at. DC will have different windings ie shunt/series but the ac gen is pretty straightforward.
a google search will be very revealing.
http://micro.magnet.fsu.edu/electrom...erator/ac.html
for a basic view.
You seem to know what you are talking about but need to sort out whether its dc or ac you're interested in.