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SINUSOIDAL WINDINGS IN A THREE-PHASE MACHINE

The stator of a 3-phase (2-pole) AC machine may be represented by 3 sinusoidally distributed windings [RGB] whose axes are displaced by 120^o. When the windings are excited with balanced 3-phase sinusoidal currents, the combined effect is equivalent to having a single sinusoidally distributed rotating winding excited with a constant current. The axis of the resultant winding is indicated in black by R.