10-3 - 10-5 . (di/ dt) = 2i/ ,
eL = - Lc (di /dt), (27.5)
L ; i .
. 27.3. :
(1 = τ); (1 < τ)
( ), . (1 = τ), , (. 27.3, ). . ,
= - (di/ dt), (27.6)
.
()
= L + = -(Lc + M)(di/ dt) (27.7)
. , ( ) (. . 26.4, ),
= 2lwcv, (27.8)
l ; w ; v .
. , .
∑e = e + e .. (27.9)
i1r1 i2r2 = ∑e (27.10)
(27.3) :
i = [ia(r2 r1)/ (r2 + r1)] + [∑e/ (r2 + r1)] (27.11)
[. (27.3)]
i = i(r2 r1)/ (r2 + r1) (27.12)
(27.11) , ∑e:
i = ∑e /(r2 + r1). (27-13)
, :
i = i + i. (27.14)
i , . 27.2. i, , , , ∑e (r2 + r1).
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, ∑e = -(L+)(di/dt). di/dt = nst, , ∑e = const.
(r1 + r2)
r2 + r1 = (27.15)
R , Sk.
(t = 0) (t = T) r1 + r2 = ∞; t = 0,5 Tk r2 + r1 = 4R. . 27.4, (r2 + r1) = f (t). ∑e 1 i = f (t) . 27.4, .
. 27.4. (r1 + r2) i
i = i + i = f (t), i = f (t) (. . 27.2) i = f (t) (. . 27.4, , 1), . 27.5. i = f (t). ∑e, , + i ia . ( ) ia = i, .. , (. . 27.2), i, (t = 0,5 T) (. . 27.4, , 1). ia t > 0,5 ( b), . . . . . .
, , . 27.5, t = 0,5 .
j2, 2 (. 27.6, ), j1 , 1. , , tg α2 < tg α1, (. . 27.5), , , t = 0,5 T , 1 2, : i2 < i1. S1 1 , i1 = i + i, . j ≡ tg α/1, α/1 t ≈ (. . 27.5).
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. 27.5.
. , , . , . - . ()
W = 0,5 Lc i2 (27.16)
. 27.6.
() ()
.
- .
27.4.
i = ∑e / ∑r (27.17)
∑r i:
, .
, ∑r, , , r,
i = ∑e / r (27-18)
, i, , r, ∑e . , .
. , . . r. , , . . r , , .
, , (. 27.1). , . 110 440 .
, , , .
. = el + . : , , , , . - , ,
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27.1
, | - , | - , /2 | |
, 611 | 1,92,0 | 0,110,12 | |
2,02,7 | 0,100,15 | ||
- ; | 2,0 | 0,060,07 | |
- , | 0,21,5 | 0,150,20 | ( 48 ) |
, . 23 .
. , (1 < τ), (. . 27.3, ), . Lc. (Lc ≡ w c) . . . ( ) . .
. , . , . . :
∑e = .
∑e , , [. (27.8)], .
∑e = .
().
. .
1 , . .
, , , (. 27.7). , ()
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F = k Fa (27.19)
k = F / F - , F F [. (26.6)]. k = 1,20 ÷ 1,45.
, F.. 1530 % .
[. (27.19) ], . ∑e , , (. . 27.4,6, 2).
. 27.7.
() ()
i2 = ia + i , . 27.8, . . , < 0,5 ( b). (. . 27.6, ). , 2 , i2 = ia + i. /2 ≡ tg α/2 (t ≈ 0). . , - , , .
. F I, . . F.
. 27.8.
, , (. 27.9).
. 27.9. . 27.10.
.
. 27.11.
. , - (. 27.10). ∑ = - , . . . σ, (. 27.11). , , δ : δ1, δ2 (. . 27.7).
δ2 σ. δ2 , .
. 1 , , . (. 27.12, ), q (. 27.12, ). , .
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. 27.12.
mm' = 0. . β, . . mm' ( cc'), ' . , ( - = 0), . . (). .
: ) , , ( , ); ) (. . 26.5); ) , .