346

ELECTRICAL APPARATUS

In the inductively compensated series motor with secondary
excitation, or inverted repulsion motor, 3, the quadrature flux,
$1, is quite large, as a considerable voltage is required for the
field excitation, especially at moderate speeds and therefore high
currents, and this flux, $1, lags behind the field flux, $, but this
lag is very much less than 90°, since the secondary circuit is

A

FIG. 1C6.—Transformer diagram, inductive and non-inductive load.
highly inductive; the motor field thus corresponding to the con-
ditions of the transformer diagram, Fig. 166. As result hereof,
the commutation of this type of motor is very good, flux, $1,
having the proper phase and intensity required for a commu-
tating flux, as will be seen later, but the power-factor is poor.
In the repulsion motor, 4, the quadrature flux is very consid-
erable, since all the voltage consumed by the rotation of the
armature is induced in it by transformation from the compen-