U = f (I) I = const cosj = const 4-42. I = I I , cos φ U = U . .
. 4-42. .
, .
I ., U I s φ. , , : U I . U 0 = E 0 I = 0. cos φ = const U ', U ",..., U 0 U .
. 4-43 , .
. 4-43. .
4-3.9.
(4-32)
, (4-33)
I 0 I 0, E 0 = U , I . .
I 0, : f 0 = .
f 0 f . .
, f 0 f ..
:
,
... , xd () . 3 = f 0 : = 0,55 0,9; = 0,9 1,9.
4-4.
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, , . .
, . : , ( ).
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