ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 197 
380. Current in Armature.—With reference to Fig. 62, the 
value of the total flux for this single phase generator is 
12.5 0° 
equal to 2p X F, = 12.5 x 10°, or = : = 3.1 x 10° 
per pole projection, as the ratio KVA. X 1.3 is equal to 
0.065. , 
By means of Equation (35), we find the corresponding value 
of ampere conductors equal to 
55 1.6 
1,050 120 x10" X12.5x10° ZX C, where ZX C=31,500. 
381. Armature Conductors.—The normal armature current 
. _ 55,000 ; 
being = 24 amperes, the approximate value of 
2,300 
armature conductors will be ele 1,310 total, but we 
decide on the multiple of the 2X16 slots, which is 
16 x 2 X 44 = 1,408. | | 
Therefore, the armature ampere conductors are equal to 
1,408 x 24 = 33,800; and the peripheral density will be 
33,800 
2 X 23 X 3.14 
Each slot will contain 44 conductors, and the value of the 
ampere conductors per slot will be 24 x 44 = 1,056, which 
is a very reasonable figure. | | 
= 237 ampere conductors per inch. 
382. Arrangement of Slots.—The size and form of the slots 
are 1 inch by 1.75 inches, which provides for 44 No. 11 
S.W.G. wires, including 0.1 inch thick micanite slot insula- 
tion and an allowance for play as well as for the un- 
evenness of the inner surface of the slot. Fig. 88 shows 
the general arrangement of the conductors in a slot. 
The total sectional area of a conductor will be 0.01057 square 
24 
. . : Bk ON 
inch, which allows a current density of 0.01087 2,270 
amperes per square inch. 
——_wv XO TO OT 
; PROPERTY OF ELECTRICAL LABORATORY, . 
FACULTY OF APPLIED SCIENCE. 
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