U , Z, Zb, Z .
:
1) ,
2) , Q S .
3) : .
4)
III. .
3.1 .
, , 120.
EA = EAm sin wt
EB = EBm sin (wt-2 /3)
EC = ECm sin (wt+2 /3).
,
EA=EB=EC= E. , , :
EA=UA, EB=UB, EC=UC.
:
.
Ua = U e j0 = U,
.
Ub = U e-j120 = U(-0,5- j /2),
.
U = U e+j120 = U(-0,5+ j /2)
. . : U = U.
3.2 .
X,Y,Z N, ,, , , . n x,y,z, ,, .
In - . IA,IB,IC I,I,I, ..
IA= I; IB = I; IC = I.
. . , .
Ua = Ub=Uc=U; UAB = UBC =UCA = U; Za=Zb=Zc=Z;
cosΨa = cosΨb = cosΨc = CosΨ; U= U.
.
.
(Za≠Zb≠Zc),
UnN, N n ,
....
UnN =