M

i V'

p If.

* .",

384

ELECTRICAL APPARATUS

4. Inverted repulsion motor, or series motor with secondary
excitation:

e = Ei] cQEQ + c2£72 = 0; c2/o - co/2; h = 0-

5. Repulsion motor (Thomson motor):

e = cQEQ + ca$2; Ei = 0; c2/o = c0/"2; Is = 0.

6. Eepulsion motor with secondary excitation:

e = c2^2; CQ^O + Ei = 0; 70 = c0/i; /s = 0.

FIG. 186.

7. Series repulsion motor with secondary excitation :
Ei] e2 = ^2; h = c0/i; /s = 0. •

8. Series repulsion motor with primary excitation (Alexander-
sen motor) :

d = f!i; e* = CQ^O + c2#2; c2/0 = c0/2; h = 0.

9. Compensated repulsion motor (Winter and Eichberg
motor) :

e = c2#2 +

= 0; 70 = 0; c3/2 = c2/3.