34

the values:

I

and:

ELECTRICAL APPARATUS

•-

a _. I

/Xi , Xi Xz\

= s( -- --- -- b

\ri r2 r2/

D = JDj + D2,
P = (1 - «) D,
Po = «22 (cidi +

PQ

Triple Squirrel-cage Induction Motor

24. Let:

$ = flux, E = voltage, I = current, and Z = r + jx = self-
inductive impedance, at full frequency and reduced to primary
circuit, and let the quantities of the innermost squirrel cage be
denoted by index 3, those of the middle squirrel cage by 2, of
the outer squirrel cage by 1, of the primary circuit by 0, and the
mutual inductive quantities without index.
Also let: 70 = g — jb = primary exciting admittance.
It is then, at slip s:
current in .the innermost squirrel cage:
/• - —' (i)