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1-1 ????? (Definitions And Units)

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... V 0 (a) v t ( ) t (b) 0 v t ( ) t (a) v t ( ) t (b) v t ( ) t (c) v t ( ) t 1-8 (1). – PowerPoint PPT presentation

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Title: 1-1 ????? (Definitions And Units)


1
? ? ?
1-1 ?????
1-5 ?????????
1-2 ?????
1-6 ????
1-3 ????????
1-7 ??????
1-4 ????
????
? ? ? ? ? ? ?
2
1-1 ????? (Definitions And Units)
  • ????????????????????,
  • ????????????????????????????
  • ??? ?
  • ???????????????????
  • ?????,????????,?????????????
  • ???????,??????????,??????????
  • (International System of Units),?? SI ??
  • ? SI ??,?????????? (Ampere ?? A),
  • ???????????,?????????
  • SI ?????????????

1-1
3
1-1 ????? (Definitions And Units)
  • ???? SI ???????,??? 10 ?????????

? ? ? ? ? ?
109 ?? (Giga) G
106 ?? (Mega) M
103 ? (Kilo) k
103 ? (Milli) m
106 ? (Micro) µ
109 ? (Nano) n
1012 ?? (Pico) p
1-2
4
1-2 ????? (Charge and Current)
???????? t0 ? t ??,????????????
????????????????,????????? ??????,????? (?)
????,???? (?) ?????
1-2
5
1-2 ????? (Charge and Current)
  • ? 1-1?????????? q 5t2 8t mC ,
  • ?? t 0s ? t 2s ???? i ??

?
  • ? 1-2??????? i 20t 5 mA,
  • ?? t 1s ? t 4s
    ??,??????????

?
1-3
6
1-3 ???????? (Voltage, Energy and Power)
  • ????? 1 ?? (1??) ??,?????????????
  • ????,?????? (Voltage,??V)?
  • ???????? 1 ??????? 1 ??,???????? 1V
  • ???,? 1V 1J / C??????????????
  • ????????????????????,???????
  • ???????????????
  • ???????????,??????????,??????
  • ?????,????????
  • ?????????? (?????),?????????????

1-4
7
1-3 ???????? (Voltage, Energy and Power)
  • ???????????????,??????? v,
  • ????? Dq ?????????????,
  • ???????? Dw,?

Dw vDq
?????????? Dt ,????????? (w) ?????
vi ??? (J / C)(C / S) ? (J / S), ???? 1J / S ? 1
?? (Watt,??W)?
1-5
8
1-3 ???????? (Voltage, Energy and Power)
  • ???????????? p vi,?????????????,
  • ????? vi ???,????????????????,
  • ???????? vi ???

??????? t0 ? t ???????????
1-5
9
1-3 ???????? (Voltage, Energy and Power)
  • ? 1-4?????,???? A ????? i 4A,?
  • (a) ???????
  • (b) ??? t 0s ? t 4s
    ??????????

?
1-6
10
1-3 ???????? (Voltage, Energy and Power)
  • ? 1-5 ????????????????,
  • ??? v(t) cos100pt (V),? t 1
    ms ? t 4 ms
  • ?????????

? (1-4) ?
?
? ,?????????,? t 1ms ?
??,? t 4ms ?
1-7
11
1-4 ???? (Circuit Elements)
  • 1. ???(Voltage Source)

?????????????????,????????????,??????
(1). ?????????
(a). ??????????????????????
(b). ?????????????????????
1-8
12
1-4 ???? (Circuit Elements)
  • 1. ???(Voltage Source)

(2). ?????????????????
(a). ????????????????,????????,
????????????,?????????
?????????????
???? v ??????????????
(b). ??????? (????) ???????????????
????????,???????? (a)
??????????? (VCVS)
??????????????,??? (b)
???????????
(CCVS)
??????????????,??? (c)?
1-8
13
1-4 ???? (Circuit Elements)
  • 2. ???(Current Source)

?????????????????,????????????,??????
(1). ?????????????
(a). ??????????????????
(b). ????????????????????
1-9
14
1-4 ???? (Circuit Elements)
  • 2. ???(Current Source)

(2). ?????????????????
(a). ???????????????????????,
?????????????????????,
?????????????,i ??????,
?????????
(b). ????????? (????) ?????????,????
????????????,???????? (a)
??????????? (VCCS)
????????????????,??
? (b)
??????????? (CCCS)
????????????????? (c)?
1-8
15
1-4 ???? (Circuit Elements)
  • 3. ???(Resistor)

(a). ?????
(b). ??????
????
1-11
16
1-4 ???? (Circuit Elements)
  • 4. ???(Capacitor)

1-12
17
1-4 ???? (Circuit Elements)
  • ???(Inductor)
  • 5. ???(Inductor)

???????????????????????????? ??????????,
?
??? N ??,L ??????????????,????? ( Henry,?? H )
Þ
Þ
1-13
18
1-5 ????????? (Passive and Active Elements)
  • ?????????????????????,????????,
  • ????????
  • ??????????
  • ??????????

??????????
???????????
1-15
19
1-5 ????????? (Passive and Active Elements)
  • ??????????
  • ? 1-8

?????????????, ???????
???????????
????????????????
1-16
20
1-6 ???? (Ohms Law)
  • ????? v(t) ??????? R ??,???? i(t) ?? R,
  • ?????????????????,
  • ? v(t) Ri(t)

1-16
21
1-7 ?????? (Kirchhoffs Laws)
  • ??????(KCL)
  • ?????????????????????

?? in ??????? n ???,N ???????????
  • ?????????????????????

?? in ??????? n ???,N ???????????
  • ?????????? ??????????
  • ???????????(???)?
  • ????????

1-22
22
1-7 ?????? (Kirchhoffs Laws)
  • ??????(KCL)
  • ???????????? ?
  • ??

1. a ? b ???,???? ?,? v1 ????(???????)
2. a ? c ???,???? ?,? v2 ????(???????)
3. c ? d ???,???? ?,? v3 ????(???????)
4. d ? c ???,???? - ?,? v4 ????(???????)
??? KVL ?? v1 v2 v3 - v4 0
  • ???????????? ??????

???????
v4 ????(?????????????)
v3 ????(?????????????)
v2 ????(?????????????)
v1 ????(?????????????)
1-23
??? KVL ?? v4 v1 v2 v3
23
????
  • 1-1 ??????????????,? t 0 ? t 4 s
  • ? t 0 ? t 7 s ????????????

?975 C383 C
  • 1-2 ?????????? A ???? v,??????
  • ???? t gt 0 ?? 4(t2-1)W? t gt 0 , v
    (2t-2)V,
  • ?? t 0 ? t 2 s ??,?????? A ??

?8 C
1-24
24
????
?6 W
?18000 mJ
?(a) 24e-2tW12 ( 1-e-2 ) J (b) (
-12e-2t ) W6 ( e-2-1 ) J (c) -8e-2tW4 (
e-2t-1 ) J
1-25
25
????
  • 1-6 ??? i 2 A ??? 12 V ??????,?????
  • ????? ( ??????????? ),??2???
  • (a) ???????,(b) ?????????

?(a) 172800 J (b) 14400 C
  • 1-7 ?????? 6 V,?????????? q ?????
  • ?? t 4 ms,????????,?? t 1 ? 10ms ?
  • ??????????????

?0.75 W2 mc6 J
1-25
26
????
  • 1-8 ?????????????

?(a) 40(b) 12(c) -24(d) -18 W
  • 1-9 ??????????????????

?-90-80-50100120 W
1-26
27
????
  • 1-10 ????? i1 ? i2 ??

?-5 A12 A
?-5 A12 A
  • 1-11 ??????? v ??

?9 V
  • 1-12 ???? i1 , i2 , v1 , v2 ??

?6 A4 A18 V28 V
1-26
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