1. Bi ging in t cng sutGI I THI U MN H C 1. Tn mn h c:- in T Cng Sut2. S n v h c trnh: - 02 (30 tit) 3. Trinh : - Trung cp4. anh gia , tinh i m:- TBMH = [im trung bnh kim tra +im Thi]/2- 10.5. Thang i m: 6. Phn b th i gian: - Ln lp: 40 tit - L thuyt: 33 tit. - Bi tp: 7 tit. 7. i u ki n tin quy t: Hc sinh cn nm vng v l thuyt mch in, kin thc c bn v in t. 8. M t v n t t n i dung h c ph n: Hc phn bao gm cc phn chnh: khi nim & ca3c i lng c trng; linh kin bn dn cng sut; b chnh lu; b bin i in p xoay chiu; b bin i in p 1 chiu; bnghch lu - bin tn 9. Nhi m v c a sinh vin: - i hc ung gi, thc hin ung cac quy nh, quy ch ca nha trng - D lp: Trn 80% tng s bui ln lp - Bi tp: lm cc bi tp lp v nh. Hon thnh bi thi v cc bi kim tra. 10. Ti li u h c t p:- Sch, gio trnh chnh. [2]. in t cng sut _ Nguyn Bnh _ NXB khoa hc v k thut - Sch tham kh o. [1]. in t cng sut _ Hong Ngc Vn _ H s phm k thut TP HCM Nguyn Vn TunTrang 1

2. Bi ging in t cng sut [2]. Trang b in t cng nghip _ V Quang Hi _ NXB Gio Dc [3]. Giao trinhf in t cng sut 1_ Nguyn Vn Nh_ NXB i Hc Quc Gia TP.HCM [4]. in t cng sut _ Nguyn Tn Phc _ NXB TP HCM 11. M c tiu c a h c ph n: Mn hc trang b cho sinh vin nm bt c nguyn l chuyn i tn hiu nng l ng in AC AC, AC DC, DC DC, DC AC. T gi p cho sinh vin kho st phn tch cc b bin i cng sut c bn: b chnh l u; b bin i in p xoay chiu mt chiu; nghch lu bin tn. 12. Ni dung chi tit hc phn:Chng 1: LINH KI N BN D N CNG SU T 1.1. Diode1.2. Transistor cng su t 1.3. Thyristor ( SCR ) 1.4. Cc linh ki n thu c h SCRChng 2: B I I N XOAY CHI U THANH I N M T CHI U 2.1. Ch nh l u 1 pha 2.1.1. Chnh lu 1 pha khng iu khin a. Chnh lu na chu k b. Chnh lu 2 na chu k c. Chnh lu cu 2.1.2. Chnh lu 1 pha co iu khin a. Chnh lu na chu k b. Chnh lu cu i xng c. Chnh lu cu khng i xng 2.2. Ch nh l u 3 phaNguyn Vn TunTrang 2 3. Bi ging in t cng sut 2.2.1. Chnh lu hinh tia khng iu khin 2.2.2. Chnh lu hinh tia co iu khin 2.2.3. Chnh lu cu khng iu khin 2.2.4. Chnh lu cu co iu khin 2.3. B l c2.3.1 Mch lc dang t. 2.3.2 Mch lc dang LC. Chng 3: I I N M T CHI U THNH M T CHI U 3.1. B converter flyback 3.2. B converter forward 3.3. B converter push-pullCh ng 4: I I N M T CHI U TH NH I N XOAY CHI U 4.1. S n a c u dng ngu n i. 4.2. S c u 4.3. S y ko 4.4. i i n m t chi u ra i n xoay chi u d ng sin 4.5. i i n m t chi u ra i n xoay chi u 3 phaCh ng 5: B BI N T N 5.1. C u trc b bi n t n 5.2. Hng d n s d ng m t s bi n t n thng d ngTrang 3 4. Bi ging in t cng sutChng 1: LINH KI N BN D N CNG SU T A. M c tiu : Sau khi h c xong chng nay, h c sinh ph i : -Nhn dng c linh kin-Nguyn l hot ng ca tng loi linh kin cng sut-V uc ng c tuyn ca tng loi linh kin.B. N i dung : 1.1. DIODECh dn in theo mt chiu t Ant n Catot. in ap U thun, UKAAKgi l in ap gi l in ap nghch t ln diode, tuy tng loi n chung co cac gia tr khac nhau. in ap thun U AKca diode Silic l 0,7V, ca diode Gemani l 0,3V.in ap nghch t ln diode ma no co th chu c tuy tng loi, co th t hang trm vn n hang ngin vn. Dong in ma diode chu c cng tuy theo tng loi co th t vai trm mA n hang trm A. Diode thng c s dng trong chnh lu . K AK AHnh 1.1 K hiu v h nh dng diodeNguyn Vn TunTrang 4 5. Bi ging in t cng sut 1.2. TRANSIST OR CNG SU TCo hai loi : Transistor thun vit tt la PNP va transistor nghch vit tt la NPN. Chng lam vic hai ch : - Ch khoa: ngt hoc dn bao hoa. - Ch khuych i. Trong in t cng sut, transistor lam vic ch khoa. Th ng s quan trng nht ca transistor la h s khuych i dong in = IC / IB . cho transistor dn bao hoa su, ta phi cp mt dong IB = kIBsat, vi k la h s, IBsat l dng cc B khi transistor bao hoa. Khi bao hoa in ap UBE 0,7V; UCE = 0,2V. Hnh 1.2: K hiu v hnh dng mt s loi transistorNguyn Vn TunTrang 5 6. Bi ging in t cng sut 1.3. THYRISTOR ( SCR )Co 3 cc: Ant, Catt v Gate (cc cng). iu kin cn va m SCR - UAK > 1V - Ig Igst Igst la gia tr ghi trong s tay tra cu iu kin SCR kho : Khi m, SCR khng t khoa mc du xung dong iu khin ht. khoaa SCR co hai cach: - Gim dong lam vic I xung di gia tr dong duy tri I , AKH- t mt in ap nguc ln SCR (bin phap thng dung). in tr SCR trng thai ngt c hang trm k, trng thai m con khong 0,010,1 Thi gian m hoc khoa SCR c vai chc s Hnh 1.3: K hiu SCR va hinh dng vai loi SCR thng dng Nguyn Vn TunTrang 6 7. Bi ging in t cng sut 1.4. TRIACTriac ging hai SCR mc song song ng c nhau. Triac c th dn d ng theo hai chiu t y theo c ch k ch cc G, v vy triac kh ng c n c kh i nim an t v cat t thayv o l T1 (hoc B1) v T2 (hoc B2) vi k hiu T1 gn cc G.Hnh 1.4: Cu to v k hiu triac Ph ng ph p k ch triac (m triac). + Khi T2 c in ap d ng, k ck cc G bng triac xung d ng th triac dn theo chiu t T2 n T1 + Khi T2 c in ap m, k ck cc G bng xung m th triac dn theo chiu t T1 n T2 Z T2 + G +T1Z T2+ -T1T2T2 G -+ T1+T1Hnh 1.5: C c ph ng ph p k ch triac. C. C u h i n t p Cu 1: Trnh by nguy n l hot ng ca Diode, Transitor, thyristor, triac. Cu 2: V ng t tuyn ca Diode, Transitor, thyristor, triac.Nguyn Vn TunTrang 7 8. Bi ging in t cng sutCh ng 2: B I I N XOAY CHI U TH NH I N M T CHI U A. M c tiu : Sau khi h c xong chng n y, h c sinh ph i : -Trnh by c vai tr ca in mt chiu.- V li s v dng sng ng ra ca cc mch chnh lu khng iu khin v chnh lu c iu khin. -V li c mch lc v dng sng ng ra ca mch lc dng t v mch lcLC. Nu c ngha ca b lc. B. N i dung : Trong k thut in t, buc phi s dng in mt chiu phn cc cho transistor. Nhng in mt chiu nh pin, accu va may phat mt chiu qua tn kem. Co mt cach n gin hiu qu la chuyn in xoay chiu ang co sn t li in thanh in mt chiu. B i in xoay chiu thanh in mt chiu ngi ta con gi la. b ch nh l u. C u trc c a m t s ch nh l u. 1 May bin ap (MBA): May bin ap dung thay i mc in ap ca li in phu hp vi in ap cn s dng. 2 Chnh lu: La s chnh lu thc hin chc nng bin i in xoay chiu thanh in mt chiu. 3 Mch lc: Gm cac phn t phn khang nh t in, cun cm lam chc nng san phng in ap chnh lu, gim mp m. 4 Mch phn hi: Lam chc nng o lng tin hiu nh dong in, in ap li ra mch chnh lu a n mch iu khin. 5 Mch iu khin: Dung iu khin cac thyristor trong chnh lu co iu khin. Nguyn Vn TunTrang 8 9. Bi ging in t cng sutChnh l uTi mt chiuLciu khinMBAPhn hiHnh 2.1: Cu truc chung ca mt s chnh lu. 2.1. CH NH L U 1 PHA2.1.1. Ch nh l u 1 pha khng iu khi n a. Ch nh l u n a chu k . T i thu n tr R ban k dng diode cho dong qua ti, U =U . Ban k m oidiode khoa khng cho dong qua ti U = 0. Gia tr in ap chnh lu trung binh : oUtb=0,45Ui vi Ui tr hiu dng ca in ap vao. uOUimaxuO iRUtbUo 0UiRtHnh 2.2: S chnh lu ban k va dng in ra trn ti. T i in tr va in c m (R + L): V ti co tinh cm nn s sinh ra sc in ng t cm e ngc vi chiu bin thin ca dong in: e = - L.di/dt, tc la no co xu hng chng li s tng hoc gim dong in sinh ra no . Trn hinh ta thy rng, trong khong 020mA vn khng bo li 20 . 4 Tnh hiu D ng u vo c