электротехника часть 2
.pdf,
. 3.5.
C1 , C2 , C3
, , . S 2
.
"0" (
).
. ,
,
, - , -
.
,
,
, .
-
. -
.
2.-
,
,
, .
S 2
.
, .
,
,
.
. 3.1.
5.,
5...6 .
125% (
).
31
. 3,5.
:
1 - ; 2 - ; 3 - ; 4 - ; 5 -
32
: ,
,
, . 2 4.
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3.1 |
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IA, |
UA, |
P1, |
n 2 , |
F, |
, |
2, |
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cos 2 |
S, |
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A |
B |
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% |
B ×A |
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5 |
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1.-
.
2.:
) , ,
M = 9.81F ×l × cosa, (3.10)
F - , ; l - , ;
α- (
, a = 0 );) , ,
P = |
M × n |
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(3.11) |
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9.55 |
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) , %. |
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h = |
P |
×100 |
(3.12) |
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) |
P1 |
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P1 |
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cosj = |
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(3.13) |
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3U A I A |
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n1 - n2 |
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S = |
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(3.14) |
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n1 |
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33
.3.1.
3. n2 (M ,
.
4. .
1.?
.
?
3.-
?
?
.
, , ?
7.?
.
?
?
?
,
?
4
.
:
;
,
.
34
[1, § 17.1, 17.2, 17.3, .373-378; § 17.10, 17.11, 17.13, 17.14, .391-398; 3, § 13.9, 13.10, .315; 4, § 9.1, 9.2, .348, 9.6, .355, § 9.8, .360-363].
. - -
, -
. - .
,
, :
, 1 2 ,
1 2 .
- .
,
, .
.
- -
.
,
,
.
, .
. :- , ;
U - , ; I - , ;
I B - , .
- -
( .), .
.
. E = f (I B ( . 4.1) n = const
I H = 0 .
U = f (I ) ( . 4.2)
n = const, I B = const .
35
E,
B
u=¦(I)
I =0
,
. 4.1.
u, B
u=¦(I)
R =const
,
. 4.2.
,
A
=¦(I )
,
. 4.3
I B = f (I ) ( . 4.3) n = const U = const , ,
.
36
( . 4.4),
, ,
.
, Rn , RB RB1 , RH
.
) |
) |
. 4.4: - ;-
1. . 4.1.
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4.1 |
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UB |
IB, A |
n, |
IH, |
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2. -
. 4.2.
37
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4.2 |
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3.. 4.4.
4..
Rn R . -
.
R .
, ,
. ,
,
,
, .
5. . E = f (I B n = const
I=0 ( B1...B6 ).
.
RP1 , 5...6
(I B = 0 1.2U H
, RP1
.
,
, .
. 4.3.
.4.3
IB, A
U, B
U, B
6. U = f (I )
n = const, RP1 = const .
; ,
, . I
RH 0 1,21 I H (5...6 ).
. 4.4.
38
4.4
I, A
U, B
7. I B = f (IH )
n = const U = const . 0 1,2 I H
RH .
RP1 .
. 4.5.
4.5
I, A
IB, A
1.. 4.3...4.5, -
., .
, % :
DU = U x -U H ×100
U x
U X ,U H - .
.
3. .
1.-
?
.
3.-
, .
4..
5., .
6.?
?
8.,
.
?
39
5
:
;
, -
;
,
.
[1, §17.1, 17.2, 17.3. 17.4, .373-383; §17.10, .391; §17.15, 17.16,.399-402; §17.19, .411; 3, §13.12, 13.13, .320-322; 4, §9.1, 9.3, 9.2, .342349; §9.11, .367; §9.16, 9.17, 9.18, .372-380].
: ( )
( ) .
, .
.
-
,
.
:
.
n = |
U - I |
|
× R |
(5.1) |
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Ce
,
. . -
,
I R U ,
40