, , 2 p/ 3 , .
: , ; ; (), (, ), (, ).
(). , , , . , 2 p/ 3. .1 . , , , X, Y, Z. , , . .
w , , m w, 2 p/ 3 . .
.1 .2
.3 .4
( ) , .2.
.
, , . .3. , ( ) = m sin wt; = m sin (wt 2 p/ 3)
= m sin (wt 4 p/ 3) = m sin (wt + 2 p/ 3).
:
= ; = ; = = ,
, , - ;
: = .
:
+ + = 0;
+ + = 0.
.4: ; . , . .
, X, Y, Z N, (.5). 4 , , N n. .
|
|
.5
, x, y, z n , , , .
UA, UB, UC , , . UAB, UBC, UCA, , . :
; ;
;
+ = 0;
+ = 0.
.6
.6 . ,
U = U 1,73 U.
IA, IB, IC, , . , , . :
I = I.
n (.5) , :
= + . (1)
, Z a = Za ; Z = Z ; Z = Z , :
Za= Z = Z= Z (2)
:
j = j = j = j . (3)
, (2) (3) , , .
j = yu yi (. 1) . , - :
Z = R + jX = Z ,
Z = - ;
j = arctg - (4).
1
- |
, (.5), , , (5)
; ; ; -
, .
Y a = Y = Y = Y ,
I = , = 0. .
- .7.
.7 .8
, Z N = 0, Y N = ¥. = 0. , .. (, , .8):
= ; ; ; = .
: = + .
, .. Z N = ¥, Y N = 0 , (.9).
|
|
:
= - ;
- ;
- .
:
= = ; = ; = ;
+ = 0.
, , 1 (.4).
.9 .10