e (t) = E 0 RLC (. 4.4).
, , .
uC (0) = uC (0) = 0; iL (0) = iL (0) = 0. (4.12)
t ≥ 0:
. (4.13)
(4.12) (4.13)
. (4.14)
(4.13), :
. (4.15)
, , . . i (t) t ≥ 0 :
. (4.16)
RLC -
Lp 2 + Rp + 1/ C = 0
:
(4.17)
α = R/ 2 L ; .
(4.17)
. (4.18)
(4.16) (4.14)
. (4.19)
(4.12) (4.16) (4.19) t ≥ 0, A 1 A 2:
(4.20)
. (4.21)
(4.21), (4.17) (4.18) :
. (4.22)
:
. (4.23)
α ω0 (4.17), , , Q (4.18), (4.17) (4.18) (α > ω0 Q < 1/2), - (α < ω0 Q > 1/2) () (α = ω0 Q = 1/2).
(4.17) (Q < 1/2), () , , │ p 1│<│ p 2│, i (2) , i (1) (. 4.5).
(Q > 1/2), (4.17, 4.18) -
.
, , (4.16), A 1 = E 0/(j 2ω L), A 2 = E 0/(j 2ω L)
.
, RLC - (, ), Im (t) . , . () Im (t) . 4.6, .
|
|
. Q → ∞ ω → ω0, , α → 0 (. 4.6, ).
Q = 1/2 p 1 = p 2 = α. (4.6), (4.2) t ≥ 0
i = i = (A 1 + A 2 t)eα t . (4.24)
(4.13) (4.14) A 1 = 0, A 2 = E 0/ L (4.24),
i = E 0 t e α t /L.
, (. 4.7). , Q = 1/2 . .
, RLC- , .. .
, , . .