Three Phase AC Voltage Generation

Three-Phase AC Voltage Generation







Most AC generators use either a twelve or a fourteen pole rotor. Each pair of poles (North and South) produce one complete sine wave in each winding per revolution.

During one revolution a fourteen pole rotor will produce seven sine waves. (The stator has one winding (coil) for each pair of rotors.)

The rotor generates three overlapping sine wave voltage cycles in the stator (one rotor three sets of windings in the stator).

The total output would be twenty one sine wave cycles per revolution. (3 sets of stator windings, each with 7 coils)