Электротехника и электроника
.pdf7.6 —
. -
7.6, F
(n1) .
M = F1N2 D ,
2
D — , N2 — .
n2,
n1. -
, n1 = n2, -
, . -
, F1 = 0, -
n2 n1. ,
, e,
F1 . n1 > n2, -
( ) -
s — , :
s n1 n2 . n1
n2 = n1(1 s) = |
60 f |
(1 s). |
p |
81
, -
:
1) (f), , -
; 2) ( ), -
,
;
3) (s), -
( ),
U1.
. .
-
. -
: 1; I1; -
cos 1; ( ) ;
; n2; s -
2 U1 f
.
2 = 2 , ,
2 = 2 n2 — , 60
;
n2 — , .
,
, . -
( 7.8).
82
7.8 —
. n2
0 < 2 < , -
-
(s = 4…8 %) [3].
, 7.8, -
.
= f(P2) . 2 = 0, -
, .
= ( ).
I1
.
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1 -
. -
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cos 1 = |
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Q2 , |
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S1, P1, Q1 — , .
83
s ,
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2 , . 1:
= |
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U1, I1 — ;
1 — .
( )
U1 f, . n2 = f(M).
, ,
, 8.10.
, s = 0 n2 = n1, s = 1, n2 = 0. ,
s = 1, n2 = 0, -
90° ,
n2 = f(M), 7.8, .
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) |
7.8 —
84
, -
(0 < < ) -
. -
. , s
1 %, — 4–8 %.
n2 = n1 – n2 (0,01…0,1)n1.
s -
:
M |
2M m ax |
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s s |
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Mmax = M — ;
M = 60 — ;
2 n
s = s ( + 2 1 ) — ;
P , n — .
s.
, s > 0,5, .
.
. 7.9, ,
.
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7.9 —
85
S A
B -
7.9, . , -
. S , -
, -
I I .
n ( )
I + I = Ib = I N ,
I N — .
, -
7.9, , (
), .
, , 70–80 %
.
.
( ) ( ) ,
.
.
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:
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;
86
) -
U = 100 .
7.10;
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, , 4, -
2
); , 4 -
5 ( );
) , -
,
.
7.10 —
7.1
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87
1.-
7.11, ( ).
.
3.,
, .
4.C , -
.
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7.11 — :— , —
-0012-4,
7.12.
1. -
, U1, I1, n2, M P1 -
. 7.2.
88
7.12 —
7.2
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U1, |
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s 1 |
M, |
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2. : P2, s, cos 1 .
7.2.
3. :
I1 = f(P2); n2 = f(P2); c 1 = f(P2); M = f(P2); s = f(P2); = f(P2).
4..
5..
89
1..
2..
3..
4..
5., .
6..
7..
8
: -
: , , -
.
.
2.:
1)?
2)-
?
3)?
4)?
5)?
6)?
90