ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 203 
and the magnetic resistance of the field leakage path, see 
Fig. 89, is | 
ie ee A 0.813 _330_ 
1 dxa,2dxf, atf 3.9X9 , 2X85X55 9x55 1S 
= AMS LE ie Ce Are a ae 15 LO 7 
Having ascertained that all previous assumptions are suffi- 
ciently correct, especially that of the normal value of field 
LXCTTALTOW LV AUPERETUENS. 
o___tyoe __ soo. Te __ 16000 
4 
S 
re See a as | 
m4 k 
8 
ee ee 
| N 
SHORTURCUT CURRENT LVAMPE: 
8S 
“TN 
/ 
/ 
f NN 
P / 
f 
/ 
/ 
4 
/ 
€ 
7 
f 
Teme 
Ss 
ba 
~. . 
pe —_—— 
-_ 
Fic, 90.—CHARACTERISTICS OF 55 KVA., 1,050 Revs., 70-CyrciE, 
SINGLE PHASE ALTERNATOR. 
ampere turns, the next step will be the caléulation of 
the short circuit characteristic. 
393. Short Circuit Characteristic.—The air gap relue- 
: 29.5 
tance 1s equal to —;, and the reluctance of the armature 
1U 
leakage path, see Fig. 89, is 
r= 0.313 _ 49.0 
2 4xaxlxo , 41xr(t+0) wth. 2rxixr iv* 
ext” FRO +2(7+20,)-+ ed rT XO 
