4-1 ???? (Energy-Storage Elements)

1
? ? ?
4-1 ????
4-8 ???????
4-2 ???????
4-9 ????????????
4-3 ????????????
4-10 ?????????
4-4 ?????????
4-11 ????????????
4-5 ?????????
4-12 ??????????
4-6 ??????????
4-13 ????????????????
????
4-7 ????????????????
2
4-1 ???? (Energy-Storage Elements)

• ????????????????????,
• ?????????????

• ??????,???????,???????????
• ???,?????????????? ( ?????
• ????? ),?????????? (Dynamic) ???

4-1
3
4-2 ??????? (Capacitance of Capacitors)

• ????????? q ????? v ???,?? q Cv?

???????/??,??????? ( Farad,??? F )
4-2
4
4-3 ???????????? (Voltage-Current Relationship
in Capacitors)

• ?????????????

????????
?? C ?????????,??????,? v ????, ? i
0,????,???????,?????????
4-3
5
4-3 ???????????? (Voltage-Current Relationship
in Capacitors)

• ? 4-2? (a) ???,? C 1F,????? v(t) ????
• ? (b) ??,???? i(t) ????

?
????? (c) ???
4-3
6
4-3 ???????????? (Voltage-Current Relationship
in Capacitors)

• ? 4-3?? (a) ???? v(t),???? i(t) ???,
• ?? (b) ??,? C 1F?

?
4-4
7
4-4 ????????? (Energy Storage in Capacitors)

• ?????????? Wc(t)

??? q Cv
4-6
8
4-5 ?????????(Voltage Continuities in Capacitors)

• ??????????????,?????????,
• ???????????????

4-7
9
4-5 ?????????(Voltage Continuities in Capacitors)

• ? 4-5??????? v1(0-) 14V , v2(0-) 16V,
• ??? t 0 ???,? v1(0) , v2(0)
  ? i(0) ???

?
1. ??????????,? v(0) v(0-)?
??
2. ????????????,????? i(0-) 2A ? i(0) 4A,
?????? 2A ?? 4A?
3. ?????????,????????????????????,
??????????,???????????????
4.???????????????,???????
4-8
10
4-6 ??????????(Singularity Circuits with
Capacitors)

• ??????????,????????????,
• ?????????,?????????,
• ?????????????????,
• ?????????????

4-8
11
4-7 ????????????????(Series and Parallel
Capacitors)

• ??????????

4-11
12
4-7 ????????????????(Series and Parallel
Capacitors)

• ??????????

2-12
13
4-8 ???????(Inductance of Inductors)

• ? f ???????,?? N ?????????????
• ? ? N f

• ?????????,? ????????? i ???,
• ? ? Li

?????? L ????,?????? / ??, ??????? ( Henry,??? H
), ?? 1 Wb/A ?? 1 H?
4-14
14
4-9 ???????????? (Voltage-Current Relationship
in Inductors)
?????????????
????????????, ? vL 0
?????????????????,??????
4-14
15
4-9 ???????????? (Voltage-Current Relationship
in Inductors)

• ? 4-10? (a) ???,????????? (b) ??,
• ?????????

?
i(t) ????
?????? (c) ???
4-15
16
4-9 ???????????? (Voltage-Current Relationship
in Inductors)

• ? 4-11???,???(c) ???,????? i(t) ????

?
4-16
??????? i(t) ????? (c)?
17
4-10 ????????? (Energy Storage in Inductors)

• ?????????? WL(t)

2-23
18
4-11 ????????? (Current Continuties in Inductors)

• ???????????????,??????????,
• ??????,?????????

• ? 4-13?????,?? i1(0-) 3A,???? t 0 ???,
• ? i2(0-) , i1(0) , i2(0)
  , v(0-) ? v(0) ?

?
i1(0) i1(0-) 3A
? t 0 ?? (t 0) ??,????? i1 ? 3A ,?? i2(0)
-i1(0) -3A
??? KVL ?? v(0) (-3) 6 (-3)
6 -36 V
2-24
19
4-12 ??????????(Singularity circuits with
Lnductors)

• ???????????????,
• ?????????????,
• ??????????????

2-24
20
4-13 ????????????????

• ??????????

4-1
21
4-13 ????????????????

• ??????????

4-1
22
????

• 4-6 ????,?? v1(0-) 12V , v2(0-) 8V ,
• ???? t 0 ???,
• ? v1(0-) , v2(0) , i(0-) ? i(0)?
  

?12V , 8V , 2A , 2A

• 4-12 ????? I 6A , R1 1O , R2 2O, L 1H
  , i1(0-) 4A
• ???? t 0 ???,? iL(0-) , iL(0)
  , i1(0) ? diL(0) / dt?

?2A , 2A , 0A , -4A/s
4-25