, , . .
() , .
, , , , , . , , , , . , , , , , , . .
, , , , . , ( . .).
. . , , , .
(, , . .) , . , , . . . . , , (. 1). : ra≠rb≠rc Ca≠Cb≠Cc. ga=1/ra; gb=1/rb; gc=1/rc ba=ωCa; bb=ωCb; bc=ωCc; . :
Ya≠Yb≠Yc (1)
Ya= ga+j ba; Yb= gb+j bb; Yc= gc+j bc; (2)
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, . (. 1, ) (. 1, ) , . Y0 = g0+jb0. . 1, .
; ; ;
1 - ,
g'=1/r'. , r' = Rch, g'=Gch=l/Rch ( ).
, (. 1)
Ya= Ya+g=g+ga+jba (3)
:
I3=Ua3/r=Ua3g (4)
( ) (. 1, ) :
Ua3=Ua+U0; Ub3=Ub+U0; Uc3=Uc+U0; (5)
Uo , :
U0=[Ua(Ya+g)+UbYb+UcYc]/(Ya+g+Yb+Yc+Y0) (6)
, U ,
Ua=U; Ub= Ua2; Uc= Ua; (7)
U ();
.
= j2π/3=-(1/2) + j√3/2; 2=j4π/33= -(1/2)-j√3/2; (8)
(7)
U0= U(Ya+g+a2Yb+aYc)/ (Ya+g+Yb+Yc+Y0) (9)
, (4-6) (7):
Ih=Ug[Yb(1+a2)+ Yc(1-a)+Y0]/(g+Ya+ Yb+Yc+Y0) (10)
(10) , , , (. 2). g=Gch=l/Rch.
Ih=UGh[Yb(1+a2)+ Yc(1-a)+Y0]/(Gch+Ya+ Yb+Yc+Y0) (11)
, , . (11) , , , . . , .
2 -
, , , Y , , , . (11) , . Ya, Yb, Yc (2), (8) :
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(12)
, ( ). , Ca=Cb=Cc .. ba=bb=bc=b. (12) :
( ) ra=rb=rc, , ga=gb=gc=g,
Ih=UGch[g0+3g+j(b0+3b)]/(Gch+ g0+3g+j(b0+3b)
Y0 = g0+jb0 Y = g+jb , :
Ih=UG[3Y+Y0]/(Gch+3Y+Y0)