: .
(. 6.1) , :
27
I 렠 I. | (6.1) |
n :
I A I B I C I N. | (6.2) |
- , , , :
U ab U bc U ca | U a U b U c | U b; U c; U a. | . | (6.3) |
| ||||
. 6.1 |
(Za = Zb = Zc) - . - :
U 렠 3U . | (6.4) |
(Za Zb Zc) ZN - N n U N, :
28
U E A Y a E B Y b E C Y c , N Y Y Y Y a b c N | (6.5) |
E A , E B , E C
;
Y a , Y b, Y c, Y N
- .
Y N 0.
, , - U N, :
U a E A U N ; U b E B U N ;. U c E C U N . | (6.6) |
, . , , - , (6.2).
. 6.2 . 6.1 .
. 6.2 |
29
I A , I B , I C
n
(:
a, b,
c),
I U a; Z a I U b;. B Z b I U c. C Z c | (6.7) |
, - , :
|
|
P Y P A P B P C U a I A cos a U b I B cos b U c I C cos c. | (6.8) |
, , , , :
P Y 3 P 3 U I cos 3 U I cos . | (6.9) |
1. . 6.1 , - 5. - . . 6.1.
. (Ua, Ub, Uc, UN) - ; 540.
30
6.1
|
| ||||||||||||
, | , | , | I ,A | I ,A | I ,A | P , | P , | P , | U a,B | U b,B | U c,B | U N,B | |
- | |||||||||||||
- | |||||||||||||
- - - |
2. - , 5. - . - . 6.1.
3. ; . 6.1.
4. , . 6.1, - - , U N, , - . - .
5.
,
U N,
, , - .
:
. 6.1;
6.1;
.. 4, 5 - ;
.
31
6.2
|
| ||
1 | R = 50 | = 40 | L1 |
2 | L1 | R = 50 | = 50 |
3 | = 70 | L1 | R = 50 |
4 | R = 50 | L1 | = 90 |
5 | R = 50 | = 100 | L1 |
6 | R = 50 | = 120 | L1 |
1. ?
2. - ?
3. - ? ?
|
|
4. , ?
5. - - ?
6. , .
7