168 ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
TABLE 19. 
E. M. F. 260 220 180 140 
Armature Flux. 425 x 108 3.6 x 10° | 2.95 x 10°! 2.3 x 106 
Field Flux. 5.45 x 108 46 x 10°| 3.77 x 10° | 2.95 x 108 
= Cast E ; 
. | £2 | trom. |<! 50 500 | 170 | 42,500] 110 | 35,000| 75 | 27,400| 44 
i ee 3 
a e2 
q 0.04”7 Le | 
~ | 28 | sheet | 85 
@ |g Cet | °= |126,000 | 450 |106,000| 135 | 87,000} 43 | 68,000 | 21 
8 |) 438 -| BE 
S S 5 
a | = | 0.02” | 28 
se) = | Sheet | 32 . 
aoe 3F| 86,500 |. 42 | 73,500| 26 | 60,000} 16 | 47,000! 10 
=z |} 49 | 82 
:>) > - Do > een 
2 u 0.02” | o6 
@ | 23 | Sheet | $8 
= E E e g 41,600 | 7 | 35,300] 6/ 29,000} 5] 22,500] 4 
4 bl |g : 
oa 
Moo | 44 
ea 3.2 545 350 240 140 
mn 
3 : 
& a 
) Zo » 3 _ we 
g | 38 5 é 2,250 675 215 105 
o | bo 
q © 
a a 
g eas 
= FE 3 
6 | 9] 215 | & 90 56 35 22 
a 5 
E a 
® © 
S15, 3 
ie 7 z 50 42 35 28 
EO < 
< | 
ro a 3,400 2,875 2,360 1,840 
Total Ampere Turns 
mae Hoe. 6,335 3,998 2,885 2,185 
the air leakage paths, that is, in the present case, 4,000.70: 
= 2,800 ampere turns. Then, for the first approximation, 
take the air section equal to the product of pole are and 
z= 
“as 
