Three-Phase AC Generators:

The principles of a three-phase generator are generally the similar as in which of a single-phase generator, except in which there are three equally-spaced windings and three output voltages which are all 120° out of phase along with one another.  Physically adjacent loops that was display in above figure are separated through 60° of rotation; therefore, the loops are linked to the slip rings in such a manner in which there are 120 electrical degrees among phases.

The  individual  coils  of  every  winding  are  combined and represented as a single coil.  A significance of figure is  in which  it  displays  that  the  three-phase  generator has three separate armature windings which are 120 electrical degrees out of phase.

Figure: Stationary Armature 3   Generator