.
( )
11
, ,
1:
..
:
..
2010
U | 1 | 2 | 3 | . 17 | |
4.4 | 9/40 | 27/40 | 16/40 | a |
- .
- , :
) , ; K1 = , tU = 4.4
1) e = 0; UC (0-)= 0; 2) UC (0+)=UC (0-)= 0; 3) e = E; E = UC + iR2; i =iC = C1 ; E = UC + R2C1 ; 4) e = E; U = E ; 5) : 6) 7) 8) |
) ,
3. 2, U2(t) , e(t) .
- R1 , R2 K2.
5. U2(t) .
6. RK
R3 = 400 O; LKRK: : |
- UK(t) .
- , , R4 = 200 , UK(0) 3 U1K(0).
= 3; i = ; U1k(0) = i*R4 = ; = = 3; 3R4 = R3+R4; 2R4 = R3; R4 = 200 O |
- U4(t) R4 , 8- .
= i(0)* R4 = ; (*) i3 = ; U = E i3R3 = E - ; U = U; U = Ae-t/τ; U4(t) = U + U; |
U4 = Ae-t/τ + E - ;
= E - + A = ; ( *)
A = + - E;
Zτ = + R3 - . . ;
Z = + R3 = ; (j → p)
(pL+Rk) R4 + R3R4 + RkR3 + R3pL = 0;
p(LR4 + LR3) = - (R3 R4 + R3Rk + RkR4);
p = - = - ;
τ = ;
= E(1- ) + (-E + + )*e-t/τ
10. ik(t), i2k(t) U(t).
40 30 50.
13. 14 U2(t). C1 , R2 U2(0) U2(-tk) K1 (K1 = 9/40). C1, R2, τa C1. (τa = 1, 47)
|
|
C1 = 0. 1
R =
14. C1 14 :
U2(-tk)/ U2(0) = 0,02. τb (τb = 0, 56) R2
(R2 = 11400 ). C1 . .
1 =
1 = 0.1
15. 15 R1 , . 4 . R2 C1 14.(K2 = 27/40)
R1=
16. 15. R1 = 5488 ().
17. 16. , K3 = .(K3 = 16/40).
L = 0.16
18. 16 :
τ =