Single Phase AC Voltage Generation

Single-Phase AC Voltage Generation







Single Phase AC Voltage Generation requires one stator frame with windings and one magnetic field (North and South pole pieces).







As the North pole of the rotor pole piece approaches the winding of the stator, induced voltage level in the stator begins to rise. The closer the North pole gets to the stator winding the higher the induced voltage. As the North pole reaches 90° to the stator winding the maximum amount of flux lines are acting on the winding, induced voltage is at its highest positive value (1/4 turn).







The rotor continues to rotate and the North pole gets further away from the winding. The the voltage drops, until 0 voltage is induced through the stator (1/2 turn)







With the South pole now approaching the winding voltage begins to increase negatively. When the South pole reaches 90° to the winding, again the maximum amount of flux lines are acting on the winding and induced voltage is at its greatest negative value (3/4 turn).







The South pole continues to travel farther away from the winding decreasing the negative voltage value until 0 voltage is again reached (1 full turn).

This comprises one cycle or 360° rotation of the magnetic field.

Sine wave produced by a single winding of the stator during a single revolution of one pair of pole pieces is called single phase voltage.