AC machines are motors use to convert mechanical energy to Alternating Current electricity because power transferred into the field circuit is much less than power transferred into the armature circuit, AC Machines nearly always have the field winding on the rotor and the armature winding on the stator. The two major classes of ac machines are synchronous and induction machines. 

Digital electronics are electronics that operate on digital signals. The techniques used in Digital electronics are helpful because it is very easier to get an electronic device to convert into one of a number of known states than to accurately reproduce a continuous range of values.

Digital electronics are electronics that operate on digital signals. The techniques used in Digital electronics are helpful because it is very easier to get an electronic device to convert into one of a number of known states than to accurately reproduce a continuous range of values.