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1, M li E0: Xy ra khi dng c nu khng ph hp hoc kch thc qu nh

Khi bp hng ngoi bo li E0 ng ngha vi vic dng c nu bn s dng khng ng,khng ph hp. C th ni/cho bn s dng qu nh hoc qu ln so vi ng knh cavng nhit trn b mt bp nn bp khng nhn c dng c nu.

Cch khc phc: Thay i dng c nu khc thch hp hn, trnh li kch thc, nn chndng c nu c ng knh trn 10 cm v nh hn 26cm, y dng c nu nm va trongvng bp, bp s s dng c v khng cn bo li ny.

2, M li E2: Board mch b li

Li ny xut hin c th do cc b phn bn trong board b h, khng kt ni, b chp mchhoc h mch iu khin SCR, li ny thng i km vi ting chung bo lin tc, mnhnh hin th trong thi gian di.

Cch khc phc: nu vn nm cc b phn bn trong ca bp hng ngoi, cch giiquyt tt nht l ngt ngun in v em bp n trung tm bo hnh, v li ny bn khngth t sa cha.

3, M li E3: Ngun in s dng qu thp

Bp bo li E3 khi ngun in cp cho bp qu thp di 170V, trong khi bp s dng in220V, ngun in nh bn khng p ng yu cu lm bp khng s dng c.

Cch khc phc: tt bp, kim tra ngun in, s dng n p lm n nh ngun in, sau bn c th bt bp li v tip tc nu n.

4, M li E4: Ngun in ang mc qu cao

Ngun in cp cho bp hng ngoi hin ang mc qu cao, trn 260V.

Cch khc phc: Lc ny bn cn tt bp ngay, xem li ngun in cp, dng n p iuchnh ngun in, bn s nu n an ton hn.

5, M li E5: B mt bp qu nng

E5 hin th cho bit mt knh ca bp ang b nng, trn 640 C, do nu qu lu hoc sdng bp cng sut qu cao, khng tt cho bp v khng an ton khng ngi s dng.

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Cch khc phc: h nhit nhanh chng cho mt bp bng cch tt bp, ngui khong 15pht trc khi bt bp ln.

6, M li E6: Nhit bp vt mc quy nh

Nhit bn trong bp qu nng, vt chun quy nh ca bp (ty theo hng m c hnmc khc nhau), nguyn nhn c th do nu n lin tc thi gian di, hoc do s dng cngsut ln u s hin th m li E6.

Cch khc phc: Tt bp, nhc dng c nu ra khi bp, to khng gian thng thong xungquanh bp, ly cc vt cn b phn thotkh (qut) ra nu c v bp ngui t nht 15 pht.

7, Li do ngi dng cha khi ng bp

M li ny xut hin khi bn cha nhn nt khi ng cho bp.

Cch khc phc: nhn vo nt on/off ( m/tt) khi ng bp v bn c th bt u numn n a thch ca mnh.

Nhng li thng gp khi s dng bp hng ngoi rt d nhn bit v khc phc, ngoi racn mt s li khc pht sinh trong qu trnh vn hnh bp, nu ri vo trng hp bnhy lin h ngay vi b phn k thut ca hng bp nhn c li khuyn v tr gip phhp.

1> ang nu x khi kht lt

thng l do con t275v- 5uf bnkim tra

o cu ch khng t . mt iu khin vn hot ng 80% l thay tlc ngun 5UF-275V l n ngay

2 > tt ngm bm mt hin thkhng c tc dng " khng vo in "

- kim tra cu ch t cha ?

cu ch tng cha t th xem

bp chy ngun cp trc l bin p thng hay bin p xung

nu l bin p thng thng , kim tra s cp cn trkhng khng ? nu khng cn trkhng lhng bin p riloi chy bin p thng dng cho loi bp c hin thmt quc lnh

bn s cp gm c 3v AC cp cho si t , -21v cp cho mt5V cp cho VXL , 18V cp cho qut v mch dao ng

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cm ra tng cun dy xem c thci khc hay cun li bin pbp thng thng chc 2 mc ngun cp c bn l cun 8v-1A cp cho mch iu khin , v18V - 1A

cp cho mch dao ng v qut gii nhit

2 loi bin p ngun chy ngun xung nhxu

u tin xem kim tra s cng xut v IC cn tt khng

R cp ngun tngun vo ti tlc 4,7uf-400v cn tt khng n thng t in trcp ngun scp nynu in trny cn tt thn s cng xut v IC ca bin p cp trc khng cht

nu t R ny thng s cng xut hoc IC dao ng ngun cp trc tonu mch ngun cp trc dng linh kin ri th con cng xut thng l E 13003, con n khathng l C945nu mch dng IC ngun th phbin l VIP22A,

sau khi kim tra cc linh kin c bn lin quan n iu kin hot ng ca mch ngunnu tt bn kim t2 mc ngun c bn l 5V cp cho v xl , 18V cp cho mch dao ng cngun no yu hay thp hay cao qu khng ?

cc mc ngun tt th kim tra VXL . u tin nhcc phm n ra thanh o X10K VOM loi trbn phm chm chp v xem phn cn tc dng khng ?

kin tra thay ththch anh

khi bm mt bp vn cn ting ku BIP-- kin tra iot cm bin nhit trn mm t, c nhng loi bp con cm bin ny li VXL cng botreo v khng bm c phm no na

khi bm c phm trn mt, bn d theo IC VXL xem chn PWM l chn no , ly VMO DIGITALthang o tn s, sau bt ngun ln , bm thay i tng gim nhit xem tn sv xung ra chn ny c thay i khng ??

nu khng thay i li ang bVXL -PWM nu thay i kim tra n khi dao ng LM339

xc nh c xung ra LM339 th kim tra 2 con n v linh kin khi DRIVER S8050, S8550i t gim chn G ca IGBT .

nu c li ngay tu kim tra R khong 1W vi trm K omh ly in p B+ DC v so snh bo vp thpnu c dao ng nhng khng bt ni kim tra R ly xung ACnu bt ni ci xong ct dao ng lun kim tra R ly xung HV " xung C ca s cng xut

Bp tMidea Model: EF197 nhy lon

- Tnh trng h hng: cm in tt ccc n u nhy, khngc ting bp, bp khng hot ng.- Chun on ban u: hng MCU (IC iu khin) hoc mch lin quan n MCU.- Xl:

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+ Mbp ra kim tra quan st thy cc linh kin chnh gm: IC ngun VIPer12A, n p ngun choMCU dng 7805, mch bo vIC LM339, MCU xa s. Khng thy linh kin no chy n, bp tng c sa cha (thay cu nn, IGBT, tcng hng, cu ch).+ o th(o ngui): thang x10, o cc it (hay hng); it nn in cho ngun cp p thp dngit ring, khng sdng cu nn chnh nh mt shiu khc.

o nng: p DC trn tlc sau nn (310V), p vo 7805 chng 4V, p ra 7805 chng 3,5V, ICngun khng nng.- Kt lun: mch cp ngun cho phn iu khin sai (thp), bp khng chy c.- Kim tra li: thang x10, o li cc it lin quan n mch ngun k: khng c gi trno btthng. B. Quan st kmch in thy c 1 vtr di it ni vo IC ngun bi mu. Cm in th1 pht, rt in sit ny thy kh nng. Tho it ny ra o th(loi FR107). Thang x10 thyR thun bnh thng, R nghch hi thp hn bnh thng. Chuyn vthang x1K o thy R thunnghch u 0 m. KL r it.- Thay con FR107 khc. Cm in, o p ra 7805 thy chun 5V. Lp vo, cm in chy OK.Lu : phi thay ng con FR107, khng nn thay bng 1N4004 hay 1N4007. (v n l loi FastRecovery)

Hng dn sa cha bp tNguyn l hot ng ca bp t

+ bp t dng t trng bin thin lin tc vi tn s cao to ra dng fuco ( dng in m trong my in mingi u khng thch v mong mun loi b n i ) t nng cc vt kim loi bng st, inox.+ t trng ny c sinh ra bi cun dy ng ngay di mt bp. ng ct dng in mt chiu ny ngi tadng 1 con trasito IGBT cng sut tm 45-50A. v mi nguyn do thng bt u ty ( Phn ng lc, lmnhim v nng n v quan trng ) !+ do phn ng lc c cu to bi in t vy nn cch sa cng chnh l cng vic sa cha in t, bn cnbit phng php kim tra transito v t in hng : v nh : ht thic ri o con IGBT c b chm chp khng.Kinh nghim thng IGBT cht th s cht cu ch, v nguyn nhn dn ti IGBT cht thng do con t 4micro gnlin vi n b phng - hoc con iot zenner ni vi chn IGBT c vn , bn no sa bp t thng nn lu vn ny, ch ko thay 1 con IGBT 40-50k vo li cht tip ngay ! mnh ng hc ph v ny nhiu ri ! v sau khithay IGBT mi bn nn b cun dy ng ra ri u thay vo mt bng n dy tc 220w 100w kim tra trc !+ phn kh hn v cng t hng l phn iu khin : phn ny ph trch pht xung IGBT ng ct to dngfuco trn ni, do phn ny s cm bin tn hiu dng trn chnh IGBT kim sot khng cho IGBT lm vicqu cng sut ( VD : nu vn c hot ng vi di xung nh bnh thng s ctrng hp ni b, nhn cng sutin bin thnh nhit cng b, trong khi cng sut cp vn nh bnh thng, nh vy theo nh lut bo ton ccbn bit ri , lng in tha s p cht con IGBT ngay lp tc bi qu nhit ko lm mt kp ). Do phn

pht xung ny m nhn nhim v cng kh khn khng km l : iu khin chun xc tn s giao ng trnIGBT ! do phn ny bn s phi c kin thc su v in t, nu khng vic sa l rt kh v lu, bi phi htthic tng con ra o mt xemcon no c tr s in tr bt thng ( ngha l phi c vt so snh, hoc kinh nghimc t nhng ln ng hc ph trc ri

Bp t vt dng thng s dng thng dng trong cc gia nh hin nay Khng vo in (Bt mt hin th khng c tc dng)- Kim tra cu ch t cha ?o omh xem th no- Cu ch ng cha t th xem

Bpchy ngun cp trc l bin p thng hay bin p xung, nu l bin p thng thng , kim tra s cp cn trkhng khng ? nu khng cn tr khng l hng bin p ri . Loichy bin p thng dng cho loi bp c hin

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th mt quc lnh

Bn s cp gm c 3v AC cp cho si t , -21v cp cho mt ,5V cp cho VXL , 18V cp cho qut v mch daongc m ra tng cun dy xem c th ci khc hay cun li bin p.Bp thng thng ch c 2 mc ngun cp c bn l cun 8v-1A cp cho mch iu khin , v 18V - 1Acp cho mch dao ng v qut gii nhit.

-Hai loi bin p ngun chy ngun xung nh xu

u tin xem kim tra s cng xut v IC cn tt khng?

R cp ngun t ngun vo ti t lc 4,7uf-400v cn tt khng n thng t in tr cp ngun s cp nynu in tr ny cn tt thn s cng xut v IC ca bin p cp trc khng cht.

Nu t R ny thng s cng xut hoc IC dao ng ngun cp trc toNu mch ngun cp trc dng linh kin ri th con cng xut thng l E 13003, con n kha thng l C945Nu mch dng IC ngun th ph bin l VIP22A,

Sau khi kim tra cc linh kin c bn lin quan n iu kin hot ng ca mch ngunnu tt bn kim t 2 mc ngun c bn l 5V cp cho v x l , 18V cp cho mch dao ng c ngun no yuhay thp hay cao qu khng ?

Cc mc ngun tt th kim tra VXL . u tin nh cc phm n ra thanh o X10K VOM loi tr bn phmchm chp v xem phn cntc dng khng ?

Kin tra thay th thch anh

Khi bm mt bp vn cn ting ku BIP- Kim tra iot cm bin nhit trn mm t , c nhng loi bp con cm bin ny li VXL cng bo treo v khngbm c phm no na

Khi bm c phm trn mt, bnd theo IC VXL xem chn PWM l chn no , ly VMO DIGITAL thango tn s , sau bt ngun ln , bm thay i tng gim nhit xem tn s v xung ra chn ny c thay i khng??

Nu khng thay i li ang b VXL -PWM nu thay i kim tra n khi dao ng LM339

Xc nh c xung ra LM339 th kim tra 2 con n v linh kin khi DRIVER S8050, S8550i t gim chn G ca IGBT .

Nu c li ngay t u kim tra R khong 1W vi trm K omh ly in p B+ DC v so snh bo v p thpNu c dao ng nhng khng bt ni kim tra R ly xung ACNu bt ni ci xong ct dao ng lun kim tra R ly xung HV " xung C ca s cng xut

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Khi bp nghe mi kht th thng l do con t 275v- 5uf b n

Thv phn on in trthng thng, in trmng kim loi, in trmng cacbon, in trxi mng

Phng php th1/u tin, in trl linh kin v cc tnh, khi thgi trin tr,u dy en, ca ng hvn nng c thphnbit ni thcc cc in tr,

2/Trong tnh hung thng thng, khi dng ng hvn nng thgi trca in tr,cha bit gi trin tr,nn chn vtrmc gi trin trln nht tin hnh gim nhtheo tht,Phn nh gi trthc o ca tnh nng in trphi kt hp saisgi trin tr, cui cng so snh gi trhin thtin hnh phn on tt xu,

3/Trong sa mch in,khi thin trphi tch cc kia khi mch in trnh nh hng n gi trthc o,Phn on scThng thng in trc thtrong mch in thng gp cc scnh chy hng, t mch, bin cht ( gi trin trn,hn hmch )Thv phn on Diode

Thv phn on Diode thng thng: 4148. IN4007...Din gii,A l cc dng,cn gi l cc chnh,B l cc m,cn gi l cc ph,Phng php th,Dng Mc Diodeca ng hvn nng,1, Thhng chnh,Dngu ni cc dng,u en ni cc m,gi tro c: khong 460,

2, Thhng ngc ,Dngu ni cc m,u en ni cc dng, gi tro c: ln v cng

Ch : Thnghim ngt Diode gtmch in ra, Trong thc tsa cha mch in c thda vo im in p mu chtphn on sclinh kin, tin hnh thay thxl.

Thng thng diode c thtrong mch in c cc scl t mch, on mch, hn rng

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Thv phn on diode n p 18V/0.5W hoc 20V/0.5W

Phng php thGing phng php thdiode thng thng

Ththc dng : Thng in dng mc in p trc lu ca ng hvn nng thhai on xem in p pht ra c phi lin p danh nh khng 18V hoc 20V ......Thv phn on TransistorThv phn on Transistor 8050 . 8550, D667

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Din gii; Transistor c 3 cc gm cc B , cc gp C , cc pht xE . Loi NPN thng dng tip t cc E loiPNP dng tip t cc C

Phng php thChn mc diode khng thng in hoc mc in p trc lu thng in ca ng hvn nng1. Thkhng thng in Dng u ni cc B u en ni cc C th sliu thcc BC c470 CcBE sliu thc470 cc CE sliu thl v cng ln 2. Ththng in in p cc BC khong 0.75VTransistor thng thng pht sinh sctrong mch in l Xung t, khai mch cc BE cc BC cc CEThv phn on tThv phn on tin gii cn hi l tha

Din gii A l cc chnh B l cc ph2 Cc tnh ca tin gii trong sdng thc tkhng c cm ngcPhng php thDng mcdiode ca ng hvn nng1. Thhng chnh Dng du ni cc chnh u en ni cc phsliu tho c V cng ln Nu tn ti mtsliu nht nh th l hin tng r tin Nu trong khong 0 hoc 100 th bon mch

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Phn on v thtgm

Din gii; Tgm khng phn bit nghim ngt vcc chnh phPhng php thCch thging tin giiTrong mch in tthng gp scl on mch,xung t,mt t,hn rng

Phn on v thbin p.

Thv phn on bin p

(ng mngun in)

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Din gii; Kt cu bin p phn thnh s cp v thcp Ngun in p m bp tsdng th s cp vo l 220VAC thcpra l 10.5VAC 200mA , v 22VAC(150mA), ng thi c cu ch 135tchyPhng php th;Dng ng hvn nng mc giao lu thin p s cp ca bin p xem c bnh thng khng, kim trai xem cu ch c chy khngBin p trong mch in thng c nhng sc: S cp khai on mch, thcp khai on mchchy cu chThv phn on bin p dng

Thv phn on bin p dngDin gii: kt cu htrbin p dng phn lm s cc v thcc A l s cc B l thccPhng php th: Thng thng dng ng hvn nng mc diode thgi trin trthcp bin p dng,thng l,khong 70Bin p dng trong mch in thng gp scl: s cp khai mch thcp khai on mch trng im l do tnh nngkhng tThv phn on cu chnh luThv phn on cu chnh lu RS2006M

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Din gii :K hiu cu chnh lu lDB Trc mt thng sdng RS2006M Cu chnh lu phn thnh 4 chnChn A l u ra trc lu, l cc chnh chn D l u ra trc lu, l cc phchn B v C l u vo giao lu

Phng php th: Thng thng dng ng hvn nng mc diode . u ni vi u Acu chnh lu u enniDsliu o thc l khong 840 Ngc li u niD u enniA sliu o thc l v cng ln Cu chnh lu trong mch in thng c scl: Chn A v D on mchThv phn on IGBT.Thv phn on IGBT ,K25T120, H20T120, H20R120

Din gii : IGBT c 3 chn phn lm cc ccG C vE IGBT dng trong bp in tlm dao ng xungPhng php thThng thng dng ng hvn nng mcdiode u ni cc E ca IGBT u en ni cc C, siu o thc l: khong 450. Lm ngc liu ni C u en niE, sliu o thc l: v cng ln .Gia cc GvC,Ec gi trin trnht nhIGBTtrong mch in thng c nhng scl Cc CE GE v GC on mch

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Phn on v thin trcm ng nhitDin gii in trcm ng nhit l linh kin cm ng nhit theo sbin i nhit m pht sinh thay i gi trintrTrong bp in tdng lm hsnhit m tc ty theo nhit ln cao m gi trin trbin nh

Phng php thThng thng dng ng hvn nng(mc in tr) dng u v u en phn bit ni vi bt kmt u sliu o thc l 80-100K di nhit phng 25 gi trin trl 100Kin trcm ng nhit trong mch in thng gp scl on mch v khai mch.

Tm hiu linh kin bn trong ca bp in t

Chefs Bp t 18:28

Bp in tl" ngvua" chthc trong khnggian bp hin nay ccgia nhkhngchti Vit Nam mtrntonthgii. Hiu qu

cao vtit kim chi phnnglng u votrong qutrnhsdng, cththy riu nykhi so snhvi ccdngbp trc kia nh

bp gas, bp in... Bp in tmt hiu sut sdng ctht n 90 %, cao hnnhiu so vi bp gas (40 phn trm)hay bp in

thngthng (50% n 60%). Cthkn nhng thnghiu bp in tc tin dngti nc ta thi im hin nay

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nhMunchen,Chefs, Taka, Giovani....

Bp in thiu qunnglng trong nhbp

Bp in tctht c hiu qucao nybng nhng linh kin vcngnghc bit hin i nht. Bivit nyBeptuchefs.nets

cngbn c tmhiu nhng linh kin c sdng trnnhng chic bp in thngu thgii vVit Nam hin nay.

Hnh1: skhi mch ngun ca mt chic bp in tthngthng ( Ttrisang phi: u voblc EMC / EMI, chnh luvi cct

in trung mch, bin tn vi snubber vcng hng t.EPCOS cung cp tt ccclinh kin in tthng cn thit cho phn in ca

bp cm ng.)

Blc u voEMC ca bp in t

Do tn stngi cao vcnh chuyn i dc ca IGBT, lc EMC lbt buc. Hnh2 cho thy smch ca blc c s

dng. CcB32923A2105M * series vi mt in dung ca 1 Flc bit thchhp cho hai tX2. Tnhnngvt tri ca nlmt chiu

cao chnthp chc22 mm. Trong scctY1, trong ngnchn scan thip i xng vqu, EPCOS cung cp cc

B81122C1222M * loi vi 2.2 nF vB81122A1153M * loi vi 15 nF.

Hnh2: Smch ca EMC volc ( Ccblc u vom bo rng khngcphn ng xy ra trong ccdngin do cctn scao c tora trong mch in.)

Linh kin bo vca bp in t

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Phn u vocngcccchc nngbo vquan trng ca sxmnhp hin nay hn chvbo vqup.

ti thc hin hai chc nngquan trng:

Thnht, vcctmch trung gian vn cnnguynhin volcturn-on, ng dng trc tip ca quyn lc sgyra dngsc cao chy

trong mt thi gian ngn, do gynguy him cho ccbchnh lu.Mt gii hn hin ti sxmnhp (ICL) da trnmt apha ch

thermistor NTC lmgim dngkhi ng n mt mc chp nhn c. Nhng nhit trlnh volcturn-on vdo cmt sc

khngtngi cao. Khi dngin chy qua chng,chngnnglnvkhngchin ca hgim xung. Nhhnhvi ny,hkhngch

bo vbchnh lumcnngnchn cccu chin tthi. Trong bp in tvccthit bkhctrong gia nh,cngvic nycth

c thc hin bi ccICL ca B57153S * series.

Thhai, bo vccthit bin ttqup,vic sdng ca varistor c khuyn khch.

Hnh3 : Ttrisang phi: Y1 tin, tin X2, hin bsc in, NTC sxmnhp gii hn hin ti, avaristor.

Ccsmch cbn ca mch in mngun cung cp cccun dycm ng c thhin trong hnh4. Ngoiccthit bchuyn

mch in IGBT, subassembly nycha tin vi chc nngkhcnhau.

Tsnubber

Bi vchuyn mch ca cun dycm ng to cm ng nh cao p,con ng thu-emitter ca IGBT phi c bo vthchhp. Chc

nngnyc thc hin bng cchtsnubber. Ngoiccphinbn chca B32652A1153K * series, ccloi c bit vi thit bu cui

dyeocsn mcthc vn trc tip vocht bndn in ca bchuyn i tn s. Nhng tc trngESR vESL gitrrt

thp.

Trung cp mch tin

Mch trung gian (DC link) tin lcn thit lmphng in pAC vsa cha gim thiu in pgn. Nhmt quy lut, nhmt

in vi snap-in hoc vtthit bu cui c sdng cho mc chnytrong ccng dng in tcngnghip, chng hn nhchnh

uvhthng cung cp in. Trong trng hp ca bp cm ng, tuy nhin,tbphim thng c athchcho ldo khng

gian. Nhng tin cngc phnbit bi ESR vESL ksinh gitrthp, tythuc vokiu ca chng.

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