A 3-phase alternator is a synchronous machine that changes over mechanical power into 3 control through the procedure of electromagnetic induction.
A 3-Phase alternator works on indistinguishable key rule of electromagnetic enlistment from a d.c. generator for example right when the movement interfacing a conductor changes, an e.m.f. is actuated in the conductor. Like a d.c. generator, a 3-arrange alternator similarly has a nature winding and a field winding. Review that e.m.f. incited in the armature twisting of a d.c. the generator is substituting voltage and is changed over to coordinate voltage by the commutator titted on the pole of the generator. Be that as it may, In a.c. generator or alternator, the commutator can be supplanted by a lot of slip rings and the rotating voltage produced in the armature winding can be connected to the outer burden through the slip rings. Be that as it may, essentially there is one imperative distinction between the two. In a d.c. generator, the armature winding is set on the rotor to encourage substitution and the field shafts are put on the stator (stationary part) of the machine. Since no commutator is required in an alternator it is commonly dynamically supportive and ideal to put the field bending on the turning part (i.e. rotor) and armature twisting on the stationary part (for example stator) as appeared in Figure 22.1.