, (), (Q) (S) , , . f = 50. .
U = 220 B; L = 0,05 ; r = 70 ; r = 13 ; = 190 .
4
.
. , , .
.
, (4.1)
U , ;
Z .
,
, (4.2)
r ;
xL, xC .
Ia Ip , :
Ia = I cos φ; (4.3)
Ip = I sin φ. (4.4)
φ .
(4.5)
;
;
IL, IC .
I, U
P = S cos φ; (4.6)
S = UI. (4.7)
. (4.8)
I, U .
Q = UI sin φ. (4.9)
:
.
ΣIL = ΣIC, , I = ΣIa , . , , .
. . .
, , . . φ , φ , .
|
|
φ
, (4.10)
Uc ;
I .
, bL > bC, bL = bC ( ), bL < bC ( bL , bC ). .1.1 .
:
; (4.11)
, (4.12)
.
(4.13)
.
, (4.14)
f
.
.4.1.