ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 175 
| 78,000 
in a slot, so the number of slots should be about 000 
3 
78. 
The number of poles being 8 and the phases 3, the possible 
nearest value is 72; therefore, we decide on 3 slots per 
pole and phase. 
333. Conductors per Slot.—The normal current per phase 
300,000 
1.73 X 500 
in the star connected armature is equal to = 346 
Fie. 78.—PoLEe WINDING 300 KVA., 500 Vout, 3-PHASE ALTERNATOR. 
amperes; therefore, the total number of armature conduc- 
78,000 
346 
a multiple of the slot number 72, gives the value of con- 
ductors to be applied, as 216; that is, each slot will 
tors will be = 220, or the nearest figure which is 
Piet UG.” 
recelve ay = 3 conductors. 
334. Size of Bore.—For the choice of size of the bore, it is 
: necessary to consult the data of Fig. 63, which gives the 
average values of peripheral densities. With the fore- 
