Page 46 - Electric Machinery Fundamentals
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22 ELECTRIC MACHINERY FUNDAMENTALS
¢, Wb E, T
F,A - tums H, A - turns/m
(al (b)
2.8
2.6
2.4
2.2
2.0
E 1.8 f-
'" 1.6 I--
.S'
~ 1.4
0
" x 1.2 V
d: V
/
1.0
/
0.8
0.6
0.4
II
0.2
0
10 20 30 40 50 100 200 300 500 1000 2000 5000
Magnetizing intensity H, A - turns/m
(e)
FIGURE 1- 10
(a) Sketch of a dc magnetization CUfve fOf a felTomagnetic core. (b) The magnetization curve
expressed in terms of flux density and magnetizing intensity. (c) A detailed magnetization curve for a
typical piece of steel. (d) A plot of relative permeability fLr as a function of magnetizing intensity H
for a typical piece of steel.
