, .8. ,
U(t)=U0.sin wt,
:
I(t) = I0.sin(wt+j) (19)
R,L , .
R, L C, :
- U0R = I0.R,
- U0L = I0. w L, (20)
- U0C = I0.1/wC.
I0, , (. . 9). U0R, , . U0L, y , 900. , y , 900. ( ), U0, , .
. 9, ;
U02 = U0R2 +(U0L-U0C)2 (21)
UOR,UOL,UOC (20),
U02 = I02R2 + I02(wL - 1/wC)2 (22)
.9
(22) I0,
(23)
, , . f .
. (24)
, .
sin(wt- f),
.
(23) I0 , . Ÿ Z.
. (25)
, R, L C , " ".
. (26)
Z(wp) R,
Io = Uo/R.
(UOR=IoR=U), :
U 0L = I0XL = U0 , (27)
U0C = I0XC = U0 . (28)
(27), (28), XL/R (XC/R) , .
, . , ,
|
|
U(t) = UR(t) + UL(t) + UC(t),
, .. UL(t) UC(t) .
(26) , ,
wp = .
(24) (25) , . , r, () ZL :
, (27)