электротехника часть 2

.

(1.4), (1.5), (1.6). 7.

,

F =	H 0 B0	S =	B02	S (1.7)
			2μ0
2

F - , ( )

S - , 2 ; μ0 = 4p ×10−7 - ;

B0 - , .

8. .
:
) (
);
) (
);
) ;
) .
9.
Z (I).	.

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

.

, m

, ,

( 10 ÷ 20 B ).

1- 2-

:

m1	=		E1	(1.10)
			4.44 fW1
m 2	=		E2		(1.11)
			4.44 fW2

E1 E2 - 1- 2- ;

W1 W2 - 1- 2- ; f = 50 - .

12.Bm , , -

m S

	Bm =	m	(1.12)
		S

,

,

12

Bm1 = Bm 2 = Bmδ

Bm1 Bm2 - 1- 2-

;

Bmδ - .

13.

. δ ,

	Bmδ = μδ H mδ	, H mδ				=	Bmδ
							μ0
	Hδ =	Bmδ			(1.13)
			2μ0

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)
		IC

U C - ; ΙC - .

ZC = X L , ,

X L = 2πfLC

f = 50 - ; LC - , [ .

13

L =	X L	=	ZC	(1.16)
	2πf
			2πf

,

ψ 1δ

L =	ψ 1δ	=	WC	(1.17)
C	IC		IC

δ = mδ ;

2

WC - .

( . 1,2, ). , WC

.

2 .

W1 W2 . δ

0,5 .

.

(

δ 0 ).

:

WC = 1400 δ = δ 0 220 (

'"220");

W1 =W2 = 50 ( ).

2. . 1.2, .

.

U 0 220 -

.

.

.

.

3. 1 2

. δ 1 - 2 ,

.

14

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 ).

15

								1.1
,	Uc,	Ic,	1,	2,	U12, B		1m, B	2m, B	,		,
	50
	75
	100
	125
	150
	175
	200
	220	I
+1	100
		I
+2	100
		I
+3	100
		I
+4	100
		I

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		μ =	μa
			H			μ0

) ( ,

ZC = , Φ1m , (1.16) (1.17).

1.?

2.?

3.?

.

.

.

17

?

7.)

?

8.?

9.?

?

, ?

?

?

2

:

,

;

;

.

[1, §12, .256; 2, §10, .237; 4, .537]

,

,

.

.

,

.

( ),

. ,

,

, , ,

- 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)

E20

U 20

10

,

i	=	I10	×100%, (2.3)
10		I1H

.

. 2.1.

2.1

	,	U1H,	U2H,	f,	I1H,	I2H,		u ,	i ,	P10,	,
							K12		10
		B	B		A	A		%	%

2.

,

( . 2.1).

19

. 2.1

: r1' r2' - ;

x1' r2' - Φδ 1 Φδ 2 ;

x0 - ; r0 - .

r0 x0

.. .

.

			r '			- .; x ' -
					K					K
	. .,
	.
			r ' , x'					r '	, x ' ,
						1	1	2	2			rK
	r									= r '	=
									1	2	2
				xK
	x	= x'	=		( r ' x ' -
	1	2	2		2	2

).

( ) ( . 2,1, )

. , ,

( . 2.1, ).

20