Lesson 1/Learning Event 2
Stator Design
The stator has three separate windings so that it produces three separate alternating currents. This
is known as three-phase output. Each winding is in the form of loops that are spaced at intervals
on the frame. The windings then are arranged so that they are offset from each other. The three
windings are all tied together at one end to form what is known as a wye-wound stator.
FIGURE 9. ROTOR-TO-STATOR RELATIONSHIP.
Rotor-to-Stator Relationship
The rotor is synchronized to the stator; that is, when one north pole projection is aligned with one
of the loops of the one-phase winding loop, the other north pole projections will also align with the
other loops of that phase winding. This sequence of alignment between the rotor projections is
necessary for operation. If one-phase winding was being acted on by a negative pole projection at
one loop and a positive pole projection at another loop, the two loops would cancel each other out
and no current would be generated.
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