= Jdω/dt: (5.12)
(5.13)
w, , , w0, w , w0(t) wc(t). .., (5.13) :
. (5.14)
w(t).
(t) (5.12), w(t):
(5.15)
(5.14), , . w0(t) ; w0(t) . w0(t) .., w(t).
3. - , - .
( - ). - . L¹ 0.
( 90) - . - - - , . .
- - - , ( ), L . := L/R. - : , , , , .
. , L R, U, , , :
R, .
: = L/R; ( + 1 = 0).
, t = 0 i = I:
i = i.(1 -t/) + i. -t/
.. -. - (3 ÷ 4)T. , .. L = const.
.
T
, .
= (1 ÷ 100) → T = (0,1 ÷ 1)
= (100 ÷ 1000) → T = (1 ÷ 2)
= (1000 ÷ 3000) → T = (2 ÷ 4)
(3÷4)T, . - .
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|
.5.19 L.
. 5.19 - = I
:
, (5.23)
w:
(*)
. (**)
U¢ di/dt .. (**) (.5.20,), - (di/dt > 0),
(di/dt < 0) . di/dt = 0, , (**) -.
i , ( = 0), - -
(di/dt > 0, ). ( 0 .5.20) , . ; (*) -, > = 0. , .. , L, . (*): , U¢, , U. b , = w, b i = 0 L , w >w0 e > U, .. - .
bc e > U , , - - , . di/dt = 0, L , i ¹ 0
M ¹ 0. d, .
0abcd... w0 w M - -. w(t), i(t) M(t) . 5.20,.
, - . .. R , w0, .
) )
. 5.20 - - () L ¹ 0 ()
R , w -. , , R , , L 0, R w > w0 i = 0. -. -
1 + + 2 = 0 ( - ω + dω/dt + d2ω/dt2 = ω0) (D)
p1, p2
→
.
4/ > 1, .. < 4,
;
4/ ≤ 1, .. ³ 4,
.
.8.6 - - - -
(elektroprivod 197)
(elektroprivod 191) , , oo .
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(5.7)
Sssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
) = const, M w, b < 0.
( 82) - , .5.4 ( ). - -
( : = β(ω0 ω) (5.4)
(5.5)
β = dM/dω - -; - β = ΔM/Δω.
. 5.4 - - - w(t) M(t) w()
(5.5) (5.1), :
, (5.4), w . , :
(5.6)
(5.1) d w/dt , (5.4):
, ,