51202655 Repor Mach Chinh Luu

I HC QUC GIA TP H CH MINH

TRNG I HC BCH KHOA

Khoa Khoa hc v K thut My Tnh

BO CO M PHNG MCH IN T 1

M Phng Mch Chnh Lu Bn K v Chnh Lu Ton K

GVHD:TS Ch Vit Nht Anh

Sinh vin thc hin:1.Hunh Phm So NyLp: MT12KTTN

- 51202655

Trnh by bng ngn ng nh du LATEX

Ngy 22 thng 6 nm 2014

Mc lc

1 TNG QUAN V TI THC HIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.1 Gii thiu ti . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.2 Gii thiu v phn mm m phng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 MC TIU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 THC HIN M PHNG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 L thuyt Diode l tng: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.2 Mch chnh lu bn chu k: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.3 Mch chnh lu ton chu k dng 2Diode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.4 Mch chnh lu ton chu k dng 4Diode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 KT LUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 TI LIU THAM KHO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Trng i Hc Bch Khoa Tp.H Ch MinhKhoa Khoa hc v K thut My Tnh

1 TNG QUAN V TI THC HIN

1.1 Gii thiu ti

Trong cc mch in t ca cc thit b nh Radio -Cassette, mlpy, Ti vi mu, u VCD v v. . . chng sdng ngun mt chiu DC cc mc in p khc nhau, nhng ngoi zc cm ca cc thit b ny li cmtrc tip vo ngun in AC 220V 50Hz, nh vy cc thit b in t cn c mt b phn chuyn i tngun xoay chiu ra in p mt chiu , cung cp cho cc mch trn, b phn chuyn i bao gm :

- Bin p ngun : H th t 220V xung cc in p thp hn nh 6V, 9V, 12V, 24V .v.v.v- Mch chnh lu : i in AC thnh DC.- Mch lc Lc gn xoay chiu sau chnh lu cho ngun DC phng hn.- Mch n p : Gi mt in p c nh cung cp cho ti tiu th

Cho thy c vic ng dng diode vo trong thc t nh th no, chng ta s kho st nhng vn ny bit c cch thc diode hot ng chnh lu c u ra nh mong mun.Trong ni dung ny chng ta s tm hiu v khi mch chnh lu.

Hnh 1. S tng qut ca mch cp ngun.

Bo co Mch in T 1 Trang 3/17


1.2 Gii thiu v phn mm m phng

- Phn mm Proteus l phn mm cho php m phng hot ng ca mch in t bao gm phn thit kmch v vit chng trnh iu khin cho cc h vi iu khin nh MCS-51, PIC, AVR,...- Phn mm bao gm 2 chng trnh: ISIS cho php m phng mch v ARES dng v mch in

Hnh 2. Hnh nh phn mm Proteus



2 MC TIU

- M phng c hot ng ca Diode, kho st mch v so vi l thuyt c hc.- Lm quen vi vic ng dng l thuyt vo thc t trong cuc sng.

3 THC HIN M PHNG

3.1 L thuyt Diode l tng:

Hnh 3. K hiu

Hnh 4. c tuyn hot ng

Nu diode c phn cc thun, st p trn diode l 0(vi diode l l tng) => VD = 0 vi iD > 0 . Nu diode c phn cc nghch th dng qua diode l 0 => iD = 0 vi VD < 0.



3.2 Mch chnh lu bn chu k:

- S mch

Hnh 5. S nguyn l mch

- Ng vo Vi

Hnh 6. Tn hiu ng vo Vi

Khi ng vo Vi dng diode c phn cc thun => V0 = Vi Khi ng vo Vi m diode c phn cc nghch => V0 = 0



Ta c dng sng Vo(t)

Hnh 7. Tn hiu ng ra V0

Tr DC c tnh nh sau: (Gi s ta c Vi = VimSint )VoDC =

1T

T0Vidt =

12pi

2pi0

Vimsintdt =Vim2pi

{ pi0sintdt 2pi

pi0dt}= Vimpi



3.3 Mch chnh lu ton chu k dng 2Diode:

- Chnh lu ton k dng 2 diode- S mch:

Hnh 8. S mch

bn k dng D1 phn cc thun, D2 phn cc nghch =>Vo = Vi bn k m D1 phn cc nghch, D2 phn cc thun =>Vo = -Vi

- T ta c dng sng u ra:

Hnh 9. Dng sng u ra



3.4 Mch chnh lu ton chu k dng 4Diode:

- S mch:

Hnh 10. S mch

bn k dng D1, D2 phn cc thun v D3, D4 phn cc nghch => V0=Vi bn k m D1, D2 phn cc nghch v D3, D4 phn cc thun => V0=-Vi

- T ta c dng sng u ra:

Hnh 11. Dng sng u ra

Tr DC c tnh nh sau: (Gi s ta c Vi = VimSint )VoDC =

1T

T0Vidt =

12pi

2pi0

Vimsintdt =Vim2pi

{ pi0sintdt 2pi

pi0dt}= 2Vimpi

- Nhn xt: Tr DC ca p ra gp 2 ln so vi chnh lu bn chu k.

4 KT LUN

M phng c chnh xc i vi mch c diode l l tng v tng i chnh xc i vi diode thng.Cho thy c ng dng ca Diode trong nhng mch cung cp ngun ni chung v cch mch khc ni ring.

5 TI LIU THAM KHO

Sedra Microelectronic CircuitsWikipedia


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51202655 Repor Mach Chinh Luu