, . , .
. , . , . , , , ,
. ( ) .. 1 S (. 1). ( t = 0- )
i1 = i2 + i3 ;
uR1 + uR2 + uL = E = i1R1 + i2R2 + uL ;
uR3 + uC = uR2 + uL .
E = const , i3 = CduC/dt = 0; uR3 = i3R3 = 0 uL = Ldi2/dt = 0. i1 = i2 i1 = i2 = E/(R1 + R2). uR1 = i1R1 = ER1/(R1 + R2) uR2 = i2R2 = ER2/(R1 + R2), uC = uR2.
i1 = i2 + i3 ;
uR2 + uL = E = i2R2 + uL ;
uR3 + uC = uR2 + uL .
(
t = ), , i3 = CduC/dt = 0; uR3 = i3R3 = 0 uL = Ldi2/dt = 0. uR2 = E = uC , i1 = i2 = E/R2.(
t = 0+ ) i2(0+) = iL = i2(0- ) = E/(R1 + R2) uC(0+) = uC(0- ) = ER2/(R1 + R2) . uR2 = i2R2 = ER2/(R1 + R2). uL = E - uR2 = ER1/(R1 + R2), - uR3 = uR2 + uL - uC = ER1/(R1 + R2) = uL = i3R3 i3 = ER1/[(R1 + R2)R3]. i1 = i2 + i3 = E(R1+ R3)/[(R1 + R2)R3]
t = 0- |
t = 0+ |
D (0) |
t = |
|
i1 |
E/(R1 + R2) |
E(R1+R3)/[(R1+R2)R3] |
ER1/[(R1 + R2)R3] |
E/R2 |
i2 |
E/(R1 + R2) |
E/(R1 + R2) |
0 |
E/R2 |
i3 |
0 |
ER1/[(R1 + R2)R3] |
ER1/[(R1 + R2)R3] |
0 |
uR1 |
ER1/(R1 + R2) |
0 |
- ER1/(R1 + R2) |
0 |
uR2 |
ER2/(R1 + R2) |
ER2/(R1 + R2) |
0 |
E |
uR3 |
0 |
ER1/(R1 + R2) |
ER1/(R1 + R2) |
0 |
uL |
0 |
ER1/(R1 + R2) |
ER1/(R1 + R2) |
0 |
uC |
ER2/(R1 + R2) |
ER2/(R1 + R2) |
0 |
E |
, (
D (0)=0) i2, uR2 uC. . D (0), , D i1 = D i2 + D i3.D
uR1 + D uR2 + D uL = 0 ;D
uR3 + D uC = D uR2 + D uL.(
L-C) L R3 , uC .. , , , .
, ( - , - ). :
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i3 i3 = i1 - i2. ,
.
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i2.
pk,
(1) |
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.
jw p ,
(2) |
(1).
, -
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t . , . , t . , 5% .
t = 3t . , . pk ( ) , .. t max= 1/|Re[pk]| .. . , . . - .
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