ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 187 
In the present case a total flux is taken, corresponding to 
as — ='9.95 equal to 87.5 X 10° lines. 
Therefore, the number of armature conductors is equal to 
520 2.2 
— — 6 _aning 
300 = 2 xX C X 87.5 X 10° X i200 x 10" where ZXC= 
108,000. 
. _ §20,0°0 
The normal full load current being 3.800 > 186 amperes, 
108,000 
the number of armature conductors will be rit ioe 580. 
The nearest figure to 580 which is a multiple of 24 x 4= 96 
Fie. 83.—SLot WINDING OF THE 520 KVA., 2,800 Voit, SrIN@LE 
PHASE ALTERNATOR. 
slots, is 96 X 6.= 576, which gives 6 conductors per slot. 
With the above data, the value of ampere conductors per 
one inch periphery works out as the average value of 
576 X 186 
87.5 X 3.14 — es 
360. Particulars of Slots——The number of conductors per 
slot is 6 and the normal current 186 amperes,. so each 
slot will take 1,116 ampere conductors, which, with the 
proper design of the slot, is an easy matter. 
In the determination of the slot form, we have to fix the 
eurrent density in the conductor, the number of wires per 
eonductor and the thickness of the slot insulation. 
