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 Machine 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.
1. Understanding about the term “ac circuit.”
2. Understanding about "how to analyze ac circuits" and basic construction and operation of an ac machine..
3. Concept of Induction motor, Synchronous Motors, Special Machines, etc.