Ac machines run on alternating current, cannot be run on Batteries which are of course D.C. and have certain special adaptations to the AC power source which in the US is ll0-l20 Volts at 60 Cycles...
The stator is not laminated in DC machines because it does not need to be laminated.
Lamination is used in AC machines to prevent eddy currents from generating excess power due to the transformer...
Friction losses due to air
It's worth pointing out that the windage is pronounced 'wind-age' (i.e. 'wind' as in breeze, not 'wind' as in coil!), and not 'winde-age'.
Constant losses Those losses in a d.c. generator which remain constant at all loads are known as constant losses. The constant losses in a d.c. generator are: (a) iron losses (b) mechanical losses...