(. 8.6). , : 6 3. 1
. 2 , 4 , ( ).
: . . .
, . 1 (. 8.7, ) . , , . 2, (. 8.7, ). , . , (. 8.8, ) (. 8.8, ) . , 1 , 4 . , . 1, 2, 3 4, 5, 6 (. 8.9, ). Y ∆ , . 8.9, .
8.9
3 (. . 8.6), 4 5. , 7, , . .
(. 8.10) ( ), . 400 .
. , . . 8.11
. 8.10 |
, 1 2 3 1.
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. , . , (. . 8.6), 2, I2. , 2. , , , .
2 , , (3.21) , . , , (8.1), n1= 60 f i/p, 2 1- 2. , ( 2) .
1= 2 , . , , . . ( ). .
1 2,
s = (n1n2)/n1, (8.2)
. : s = 100(n1n2)/nl.
, s = l. , 25 %.
(8.1) f 1 =p n1/60,
f2 =(1 2)/60 = 1(1-2)/(601) = spn1/60, . .
f2= s f 1. (8.3)
, f 1=50 , 4%, f2= 50 4/100 = 2 .
, = 60 f2/ = 60 f1 s/p = 1s.
, n + n2 = n1s+ 2 = 1. , 1, . . .
, . .
, , , ( U = const), .
( ), , , . , . ( 2 ).
, , : , , , , , .
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I = /( Uƞ cos φ),
( ); U ; ƞ ; cos φ .