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THREE-PHASE
SINUSOIDALLY DISTRIBUTED WINDINGS**

**
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, each phase produces a pulsating
sinusoidal field described by a space vector directed along the winding axis and
pointing to where the field is maximum positive. The combined effect is
equivalent to having a single sinusoidally distributed winding which is excited
with a constant current and rotates at the excitation frequency. The motion of
the associated space vectors is illustrated.**

© M. Riaz