‘96 ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
depends on the application of the correct magnetizing 
data for the iron material employed. 
This magnetizing data should give the different values of 
permeability for the various magnetic densities, or the’ 
number of necessary ampere turns per inch of iron length; 
and further it must be noted, that the correct value of 
the leakage factor, the values of the different sectional 
areas of the magnetic cireuit and the lengths of the various 
paths should be fixed. 
: 
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FERUUMARILITY. 
—— 
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S 
3 
AMPERE TURNS PER INCH LEN OTH, 
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cSt at Ae mf Ps ment 8 
40000 60000 $0000 700000 720000. 
MAGNETIC TENSITY. 
Fie. 46.—MAGNETIZATION CURVES. 
Equation (33), shows, that in order to determine the 
K. M. F. curve, a knowledge of the form factor is required, 
provided that the values » and Z are given. 
168. Magnetization Curves.— Magnetization curves ror dif- 
ferent qualities of iron are given in Fig. 46. These curves 
hold good for the examples of machine design under dis- 
4 
