108 ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
The values of these reluctances are indicated by: 
; ae se “2, corresponding to an excitation of 6,020 
ampere turns, 
4,310 — 32.1 
1.34 x 10° 10°’ corresponding toan excitation of 4,310 
ampere turns, 
3,325 — 29.6 
Liz x 10° > 0°’ corresponding to an excitation of 3,325 
ampere turns, and 
yd 9 . itati 
5 a = ; corresponding to an excitation of 2,585 
ampere turns. | 
4000 
: 
TERMINAL PRESSUREIW VOLTS. 
: 
is 
R 
\ 
vz >a 
- 
Y ng 
/ | 3 1 
2000 4000 6000 
LZACTIATION LV AMOHPE TINS. 
Fic. 61.—CHARACTERISTICS OF A 875 KVA, 2-PHASE ALTERNATOR. 
: 
SORD CRCUTT? CURRENT LAMPE. 
The curve resulting herefrom gives a characteristic ratio 
72 
R: which is lower than that of a standard alternator, 
where it is about 1.6. 
The greatest iron contribution to the magnetic reluctance 
of the circuit is the wheel rim and pole core, where the 
high saturation does not affect the amount of the iron 
