, (. . 15.7, ), , . , -.
, , .
, , . . [. (15.2)], .
: = U2/R = E2l2S/( r l) = E2Sl/ r. SI , ,
1 1 3 :
q = P/(Sl) = E2/ r, (15.6)
.
e, .
:
= (U m I m /2) cos j = UI cos j, (15.7)
j . (15.7) (, . 14.6), , j = p/2, . , , , . . .
(15.7), , j ¹ p/2 (. 15.8).
(. . 15.8) I m : I p I . U p/2 , , . d I m I p . . 15.8, , . :
(15.8)
. 15.8 , I p = I m cos j; (15.8),
(15.9)
(15.9), (15.7):
(15.10)
I p , [. (14.32)].
I p =. U m C w (15.11)
(15.11) (15.10) , :
|
|
(15.12)
U m . (15.12)
P = U2 w (ee0 S/l)tg d.
, ,
= E2l2 w (ee0 S/l)tg d.= w E2 ee0 tg d. Sl
SI ,
(15.13)
( ).
(15.6) (15.13), , . , .
40,58 , .