. 5-42. R p ; R .
. 5-42. .
, , , , ... . , ; E 0 = f (I ) n = const. . 5-43. I 0 , E 01,25 U , . . . i =0 ... . 2-4% U .
. 5-43. .
R p , . , , (- ) , .
.. : U = f (I ) Ia= const n =const. I=I . 5-44.
. 5-44. (U), () (E 0) ( ).
Ia S rx +2D U [. 5-6, (5-22) ], Ea = f (I ). . 5-44 . .
, ... I ', ... I .; , I (.)= I .- I '= . .. F . I (.) 2 w : F . = 2 w I (.). , , U I . .
ABC, , I (.) ( ), ( ) .
I, I (.) ( F p.) , I.
: U = f (I) n =const I =const (. 5-45). (. 5-42); I R .
|
|
. 5-45. .
, . , , ... - , .
R R =0 I . I . , . , , .
, (. 5-45):
. (5-50)
,
I =const, D U %=5÷10%.
. , : I = f (I) n =const U =const (. 5-46).
. 5-46. .
, : , , - ( 5-10, ). . , .