(. 3.12) X , Y , Z c . , .
. 3.12
,
(3.17)
ĖA + ĖB + ĖC = 0.
, .. , . , .
. .
(3.18)
U = U.
, : Uab = UAB, Ubc = UBC, Uca = UCA. Zab, Zbc, Zca İab, İbc İca. Úab, Úbc Úca . İA, İB İC .
.
(3.19)
İab = Úab / Z ab; İbc = Úbc / Z bc; İca = Úca / Z ca.
, a, b c ( 3.12)
(3.20)
İA = İab - İca; İB = İbc - İab; İC = İca - İbc.
, (3.20),
(3.21)
İA + İB + İC = 0,
.. , .
(3.22)
Z ab = Z bc = Z ca = Z ejφ,
.. Zab = Zbc = Zca = Z, φab = φbc = φca = φ.
( ) UAB, UBC, UCA ,
İab = Úab / Z ab; İbc = Úbc / Z bc; İca = Úca / Z ca.
, 120.
İA = İab - İca; İB = İbc - İab; İC = İca - İbc;
(.3.13, 3.14).
. 3.13
(. 3.14) φ (, , .. φ > 0). , UAB . , . İA İab 30, İB İbc, İC İca.
|
|
, U = U; I = I.
, .
U = U. I = U / Z, I = I, φ = arctg (X / R).
. 3.14