ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 191 
OS ESS ce a eae 3.5 inches. 
Dereeinne (Olah). Se ee ek hs Neg 
i 4.75 ‘ 
pprueeborimr fenisth a he wile 20 “ 
365. Leakage Factor.—In calculating the leakage factor, the 
gap reluctance is equal to: 
oe: 0.313 10.2 
tp. 6.8 Ves O6 68. 0.3-+0. 42 10° 
EPS THI 0.95 1.91 0.20.95 
The reluctance of the field leakage path is: 
eae 0.313 ‘Bt 
: oat ,4x7X 14. 25 7 4XTX3.5 10“ 
4X14. 25 6.7 oo 10.2 
or with a slight percentage for correction, 1.30. 
In Table 21 the calculated results of the no-load char- 
acteristic are collected. and in Fig. 86 the corresponding 
eurve is shown. ] 
366. Short Circuit Characteristic.—The constant of the 
ES ee eee r 
short circuit characteristic is equal to k, = 1 tas = 2.16, 
2 
: 10.2 
say, 1.2, where r, is equal to —, and 
10°? 
Et 0.313 _ 63 
2 4X 1.85 14.5x | D1 4X1. .85X 1.1 (11.441. 91) | 93 10° 
11.40.85 ll.4xX1 91 
Therefore, the field ampere turns which correspond to the 
normal short circuit current are 49,500 x 1.2 = 59,500 
9.500 
24 
total, or = 2,500 ampere turns per pole. 
367. Current Density in Field Winding.—The graphical 
method of determining the voltage drop gives a satis- 
