электротехника часть 2
.pdf.
(1.4), (1.5), (1.6). 7.
,
F = |
H 0 B0 |
S = |
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S (1.7) |
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F - , ( )
S - , 2 ; μ0 = 4p ×10−7 - ;
B0 - , .
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9. |
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Z (I). |
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10.
I(d ,
L(d .
11. .
E = 4.44WfFm (1.8)
, -
),
W f.
,
( . 1.1)
U = E − Z K IV , (1.9)
ZK - ;
ΙV - .
11
. 1.1.
m
ΙV
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, m
, ,
( 10 ÷ 20 B ).
1- 2-
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m 2 |
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E1 E2 - 1- 2- ;
W1 W2 - 1- 2- ; f = 50 - .
12.Bm , , -
m S
Bm = |
m |
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,
,
12
Bm1 = Bm 2 = Bmδ
Bm1 Bm2 - 1- 2-
;
Bmδ - .
13.
. δ ,
Bmδ = μδ H mδ |
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Hδ = |
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14. ,
, ,
IW = lH + δHδ
ICWC = lH + δ 0 H 0
H = ICWC − δ 0 H 0 (1.14) l
l - , ;
δ0 - , .
15. , Z 0 , -
:
Z 0 = |
U C |
[ |
(1.15) |
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IC |
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U C - ; ΙC - .
ZC = X L , ,
X L = 2πfLC
f = 50 - ; LC - , [ .
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L = |
X L |
= |
ZC |
(1.16) |
2πf |
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2πf |
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ψ 1δ
L = |
ψ 1δ |
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WC |
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C |
IC |
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δ = mδ ;
2
WC - .
( . 1,2, ). , WC
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2 .
W1 W2 . δ
0,5 .
.
(
δ 0 ).
:
WC = 1400 δ = δ 0 220 (
'"220");
W1 =W2 = 50 ( ).
2. . 1.2, .
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U 0 220 -
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3. 1 2
. δ 1 - 2 ,
.
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δ .
W1 W2 .
1 2 ,
U12 = E1 − E2 δ .
. (
U12 < E1 E2 )
) |
) |
. 1.2. ( )
( ): 1 - ; 2 - ;
- ; -
25...500 ; V1 -
10...15
4. ,
,
. 1.1. δ 0 Ι
( Ι - Ι ,
δ = δ 0 U C =220 ).
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1.1 |
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Uc, |
Ic, |
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2, |
U12, B |
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1m, B |
2m, B |
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220 |
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+1 |
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+2 |
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+3 |
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+4 |
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1..
2.,
( ).
, δ 0 .
3.:
; , ,
: 0 .
4.. 1.2,
.
5., W1 W2 : , -
100 , E1 U12 . U12 > E1 ,
, -
.
6.δ = δ 0 .
7.δ ( U C = 100
Ιc = Ι ), .
16
1..
.
3.Kδ (1.1).
Kδ ( IC ) δ = const; Kδ (δ ) IC = const;
4..
5.Φ1m Φ2m (1.10), (1.11).
Φ2m ( IC ) δ = const; Φ1m (δ ) Φ2m (δ )
U C = const; Φ2m (δ ) IC = const; ( ). 6. , -
Φ2 (1.7).
F ( δ ) U C = const; F ( δ )
IC = const;
7..
ZC (1.15). ZC ( IC ) IC = const; ZC (δ )
IC = const;
9.IC ( δ ) U C = const;
10..
11.,
U C =220 δ = δ 0 , , :
) ,
(1.12)-(1.14);
)
( μa , μ )-
μa |
= |
B |
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μ = |
μa |
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H |
μ0 |
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) ( ,
ZC = , Φ1m , (1.16) (1.17).
1.?
2.?
3.?
.
.
.
17
?
7.)
?
8.?
9.?
?
, ?
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2
:
,
;
;
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[1, §12, .256; 2, §10, .237; 4, .537]
,
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,
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( ),
. ,
,
, , ,
- E1 E2 . E2
18
.
1.
S H , f, U1H U 2 H )
. -
. U 2H
I 2H .
( .)
( .).
. U1 =U1H , -I10 , P10 -
U 20 .
K |
12 |
= |
E10 |
= |
U1H |
, . E |
≈ U |
1H |
; E |
20 |
≈ U |
20; |
(2.1) |
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E20 |
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U 20 |
10 |
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,
i |
= |
I10 |
×100%, (2.3) |
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10 |
I1H |
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. 2.1.
2.1
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U1H, |
U2H, |
f, |
I1H, |
I2H, |
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u , |
i , |
P10, |
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K12 |
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10 |
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B |
B |
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A |
A |
% |
% |
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2.
,
( . 2.1).
19
. 2.1
: r1' r2' - ;
x1' r2' - Φδ 1 Φδ 2 ;
x0 - ; r0 - .
r0 x0
.. .
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r ' |
- .; x ' - |
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K |
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K |
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. ., |
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r ' , x' |
r ' |
, x ' , |
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1 |
1 |
2 |
2 |
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rK |
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r |
= r ' |
= |
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1 |
2 |
2 |
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xK |
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x |
= x' |
= |
( r ' x ' - |
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1 |
2 |
2 |
2 |
2 |
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).
( ) ( . 2,1, )
. , ,
( . 2.1, ).
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