The amortisseur windings
These windings develop most of the starting
and accelerating torque in motors of this type. This
winding consists of a partially distributed cage
winding, with bars imbedded in the pole faces and
short circuited at each end by end rings. Varying
the number, location and resistance of these bars
will have a substantial effect on the torque and on
the kVA input. In some cases a double cage,
consisting of one row of shallow bars and one row
of deepset bars, is used. These may be separate, or
they may have common end rings as circumstances
will dictate. Typical amortisseur windings are
illustrated in Figure 15.