Title: ??:???(SCR)(Silicon Controlled Rectifier)???????????,???70??????????????????????????
1?19?
?17? ???????
17.1 ??????? 17.2 ???????? 17.3 ?????? 17.4
???? 17.5 ???????????? 17.6 ???????? 17.7
???????????
2???(Thyristor)
?????(SCR)(Silicon Controlled
Rectifier)???????????,???70???????????????????????
???
?????????????????? ???(??????????????????)?
????
????????????
317.1 ????
1. ??
PNPN???????
42. ????
??
5???????????
T1?T2????,????UGK, T1?T2????
6???????? (1)??A???? (2)???G???????
????????
(1)??A?????,???????(?UGK 0 )?
(2)????????,?????,????UAK(??UAK??),???????????????
IH ( IH??????)
7??????????
(1)???????????
??????A?K??????,G?K?????????
(2)???????,?????????
?????,???? UAK ???????,???????????????
817.2 ?????
1. ??
???????1V
????????
?IG?
IG0?
????
??
??
9???? ??????,?UAK???,??????????U
UDSM(??????)?,?????????????, UAK??? UDSM ?
????????????,?????????,? U URSM
(??????)?,??????????,????????URSM?
102. ????
(1) UDRM??????
?????????? UDRM 80 UDSM (??????)? ?????UDRM ?
100V---3000V
11(2) URRM??????
??????,??????????????????????URRM 80
URSM(??????)??????URRM?100V--3000V)
12 (3) IF????????
?????
1?5?10? 20?30?50?100?200?300?400 500?600?800?1000A
?14????
1317.3 ??????
1. ??????????
(1) ???????
14(2) ????(?u1????)
u2 gt 0 ?,?????? uG ,????? ?? uL ???? uG ????????
u2 lt 0 ?,?????,uL 0 ????????
15(3) ???????????
16?????????
17?????(???????????)
???????
u2?????????,u2???,?????????
???????????,??????????????,?????????
??????????D,??D??????????????,?????u2?????
182. ??????????
???????????????
(1) ???????
u2 (A)
T1
RL
u2 (B)
D2
T1 ?D2??, T2 ?D1??
19T2
u2 (B)
RL
u2 (A)
D1
T2 ?D1??, T1 ?D2??
20(2) ????
21(3) ???????????
22??????????,U2220V,RL3?,???????15180?,????????
Uo?????,?????(?????)?????????????????????
191V, ?15?
0V, ?180?
191/364A
23???????????????
????????????????????????????????????
24?????????????
1. ??????????,?????????
?? ??
2. ?????????????
25???
T1
D1
R
uL
u2
L
T2
D2
1. ???????????,D1?D2 ??????????
?? ??
2. ??T1????T2?????,????????????????
2617.4 ????
1. ?????????
27????
?uE lt UP UAUF ?
PN???,iE??
? uE ? UP ?
PN?????, iE?????
? -- ??? (0.35 0.75)
282. ???????????
uEltUV ??????
uEgtUP ??????
29???????
303. ?????????
(1) ????
????
31(2)??????
(a) uE uC ltUP ?,??????,uo ? 0?
??R1??????,???
R1?R2????,???? ??RB1?RB2?????? ??????
RB1RB2 ???215???
32(b) ???? ??,uC?????? uC ? UP ?,????????????,R1???
????????
UP?UV-- ???????
R2???????
(c) ????? uc ? uv?, ???????,? uo?0?
3317.5 ????????????
????
????
???
34??????
????????
35?????????
36???????????
37????
1. ?????????????,?????????????????????
382. ?????,???????????
393. ????????,?????????????????(????? ?????)????
404. ????????,????????
411. ?????????????,?????????????????????
???????????????????(?????),????????????????,??????
??????????????????(?? ???),???????????
422. ?????,???????????
??????????????????(???),???????????????????,?????
????????????????????????,??????????????
433. ????????,?????????????????(????? ?????)????
????????,???????,????????????,????????,???????????
,??????????????????
44???????????
f???????
454. ????????,????????
?????
????????
RP
?
?????
4617.6 ????????
??????????
??
47????
UCC
J
1. ??????????
????????????,????????????????T1T2T3???T3?T2????
?????????????,????????,?????
T3
D1
T2
D2
T1
T1??????
T1????????? ??,?????D2? ?,???????
482. ????
??????????????????? ????,????????
????7
??S
T1??
T2??
??S
????10
??S
????2
T3??
49??
?
??????????
7--10--2
?
???????????????????????
50?????????????????????????????????????????,???????
??(R)????????,???????????????????,???????????????
?
5117.7 ???????????
1. ??????
??????????????????
?????????,????,??????,??????
????100A????????400A?,?????0.02?,??????
?????????????,????????????,??????,????????????????
?,??????,????????,??????
52????????
???????????????
???????????????????
?????????????????? ????????,?????????
53??????
?????????????????????????????,?????????
????
????
????????,???????,?????,???????