IN T CNG SUT 2

IN T CNG SUT 2 Lu Thin Quang

TRNG H GIAO THNG VN TI

THNH PH H CH MINH

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KHOA IN-IN T VIN THNG

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TI: MCH NGHCH LU 12-220V Ging vin hng dn : Ths Lu Thin Quang Sinh vin thc hin : Trn Quang Tuyn

Hunh Vn Tng

Nguyn nh Duy

Lng Vn Hong

Lp : DT12 Tp.H Ch Minh,ngy 12 thng 6 nm 20MC LCI.li ni u..trang 2II.S khi ....trang 3III.Cc linh kin s dng..trang 3

Khi ngun.trang 3

Khi vi iu khin (PIC16F877A).trang 3

Khi reset cho PIC16F877A..trang 4

Khi to xung cho PIC16F877Atrang 4

Khi IC li cu Htrang 5

Cu H..trang 6

My bin p v t lc..trang 7IV.Mch nguyn l v mch thc t.trang 8

S nguyn l, nguyn l hot ng ca mchtrang 8

S layout, mch thi cngtrang 9

Code PIC16F877A..trang11I.li ni u.

Trc tin chng em xin chn thnh cm n thy tn tnh gip chng em trong vic nh hng, gp , cung cp kin thc c bn trong mn v trang b cho chng em nhng kin thc cn thit , lm nn tng cho vic thc hin n mn hc ny.

Ngy nay vi s pht trin vt bc ca khoa hc cng ngh, cc thit b in dn ph bin trn khp t nc. Nhng mt thc trng hin nay l tnh trng thiu nng lng hoc s c gy mt in vn din ra thng xuyn. Nhng s c mt in bt ng nh vy c th gy hi hoc h hng cho cc thit b in, cng nh c th gy nhng hu qu nghim trng hn v d nh dng hot ng ca h thng n tn hiu giao thng , mt d liu trn my tnh hoc server. V vy cn c mt thit b c th cung cp nng lng tm thi khi mt in t ngt. Trong ti ny chng em s thc hin bin i ngun in 1 chiu 12V-DC thnh ngun in xoay chiu 220V AC s dng cho cc loi ti c bn trong i sng hng ngy.

II.S khi ca mch:

.III.Cc linh kin c trong mch:

1.Khi ngun:

bnh c quy 12V-DC

IC7805, t : n p ngun 12V-DC sang 5V-DC

2.Vi iu khin (PIC 16F877A):

hnh nh:

Cc chn s dng v chc nng ca tng chn:

Chn (1): c 2 chc nng. : ng vo reset tch cc mc thp.

: ng vo in p lp trnh khi lp trnh cho PIC.

Chn (11,32), (12,31): l cc chn cp ngun cho PIC.

Chn OSC1/CLK1 (13) : ng vo kt ni vi dao ng thch anh hoc l ng vo nhn xung clock bn ngoi.

Chn OSC2/CLK2 (14) : ng ra kt ni vi dao ng thch anh hoc l ng ra nhn xung clock bn ngoi.

Chn (16): xut nhp s/ ng vo b dao ng timer 1/ ng ra capture 2, ng ra compare 2, ng ra PWM2.

Chn (17): xut nhp s/ ng ra capture 1,ng ra compare 1, ng ra PWM1.

Chn (33): xut nhp s/ ng vo tn hiu ngt ngoi.

3.B cp xung cho PIC 16F877A:Gm thch anh 20MHz: to xung cp cho PIC16F877A

T 33pF: lc phng xung ca thch anh

Thch anh 20MHz

4.reset mch:

Gm 1 cng tc 2 cc, 1 t 10pF, 1 tr 10K

5.B li mch cu H:

+ Gm c 2 con IR2104 (li 2 Mosfet IRFZ44N)

Thng s ca IR2104:

-Chu c in p ti a thong qua l 600V khi y ti.

-Phm vi in p li ra t 10-20.

-in p vo cng logic l 3,3V ,5V v 15V,ngng hot ng khi tt c 2 u vo.

-u ra bn cao HO cng pha vi u vo.

-IR2104 c cng sut cao,in p cao v nhy cao ph hp vi iu khin MOSFET v IGBT vi u ra Logic xung cn 3,3V.

-1 knh c th li 1 MOSFET loi N v hot ng n 600V.

Cc chn ca IR2104:

: cp ngun cho IR2104 hot ng (10-20V)

IN: ng vo logic mc cao.

: ng vo logic mc thp.

COM: chn ni GND

HO: ng ra

LO: ng ra

+) Mi con IR2104 s c i km vi: 1t , 1t , diode FR107, 2 tr cng sut .

Kt ni c trng ca IR2104:

6.Cu H:

Gm 4 Mosfet IRFZ44N, 4 iode FR107, 4 in tr 10K. Thng s, chc nng ca IRFZ44N:

Chc nng:

Thng s: in p MAX, l dng MAX,

Diode FR107: thng dng v khi chuyn bn k.in tr 10K: chng dng t kch vo chn G ca IRFZ44N

7.My bin p, t lc:

+) My bin p: 6-220V, 5A

Chc nng: tng p t 6V ln 220V

Hnh nh:

+)T lc: 225J-400V.

Chc nng : lc, lm mn in p ra 220V.

Hnh nh:

IV. cc s ca mch:S nguyn l:

Nguyn l hot ng:

Khi cp ngun 5V-DC vo cho PIC16F877A, ngun 12V-DC vo cho IR2104 v 2 mosfet Q2, Q3. Th mch trng thi sn sang hot ng.

Nhn cng tc K, th PIC 16F877A bt u qu trnh bm xung bng phn mm (c lp trnh) v xut cc xung PWM ra 2 chn 16,17. Tn hiu xung t 2 chn 16, 17 lun so le vi nhau ngha l nu xung ra chn 16 l mc cao th chn 17 s l mc thp v ngc li.

Chn 16 cung cp xung iu khin cho IC li IR2104 li 2 Mosfet IRFZ44N (Q2 v Q1).

Chn 17 cung cp xung iu khin cho IC li IR2104 li 2 Mosfet IRFZ44N (Q3 v Q4).

Trng hp xung ra chn 16 l logic mc cao, chn 17 l logic mc thp khi :

IC IR2104 s iu khin xut in p ra chn HO v in p ny kch vo chn G ca mosfet Q2 cho Q2 dn, cn chn LO s khng c in p xut ra nn Q1 khng dn.

IC IR2104 s iu khin xut in p ra chn LO v in p ny kch vo chn G ca mosfet Q4 cho Q4 dn, cn chn HO s khng c in p xut ra nn Q3 khng dn.

Khi ta c cp mosfet Q2,Q4 dn cn Q1,Q3 khng dn.

Ngc li khi xung ra chn 16 l logic mc thp,17 l logic mc cao th ta c cp mosfet Q1,Q3 dn cn Q2,Q4 khng dn.

C lin tc vi chu k nh vy ta s to nn 2 bn k lin tip ngc nhau to nn dng in c dng sng xoay chiu.

Cc in tr mc vo chn G,S ca mosfet c nhim v chng dng t kch vo chn G ca mosfet.

D1,D3,D4,D6 c chc nng x dng ngc v t mosfet khi o bn k, trnh h hng mosfet .

S layout:

Mch thc t:

Code ca vi iu khin PIC16F877A trong mch:

Ti liu tham kho:

http://www.hocavr.com/index.php/hardware/hbridgehttp://dientucoban.bestforumlife.com/t58-topichttp://tbe.vn/chia-se-kien-thuc/7056-phuong-phap-dieu-xung-pwm-la-gi.htmlhttp://myprojectaboutsmps.blogspot.com/2015/03/bo-ieu-khien-bootstrap-ir2110.htmlgio trnh IN T CNG SUT 1._1496196896.unknown

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