Kev sib raug zoo ntawm PCB daim ntaub thiab EMC
Kev taw qhia: Hais txog qhov nyuaj ntawm kev hloov hluav taws xob, qhov teeb meem ntawm PCB daim ntaub phaj tsis yog qhov nyuaj heev, tab sis yog tias koj xav teeb tsa lub rooj tsav xwm PCB zoo, kev hloov hluav taws xob yuav tsum yog ib qho teeb meem (PCB tsim tsis zoo, uas tej zaum yuav ua rau tsis muaj teeb meem li cas koj debug qhov debugging Cov tsis yog debugging daim ntaub. Qhov no tsis yog alarmist), vim hais tias muaj ntau yam uas xav txog PCB ntaub boards, xws li hluav taws xob kev ua tau zoo, txheej txheem txoj kev, kev ruaj ntseg yuav tsum, EMC cuam tshuam, thiab lwm yam. Ntawm cov xwm txheej, hluav taws xob yog qhov yooj yim tshaj plaws, tab sis EMC yog qhov nyuaj tshaj plaws los kov.Kev nce qib ntawm ntau qhov haujlwm yog qhov teeb meem EMC.Kab lus no yuav qhia rau koj txog kev sib raug zoo ntawm PCB daim ntaub board thiab EMC los ntawm 22 cov lus qhia.
- Lub voj voog siav tuaj yeem ua tau zoo ntawm EMI Circuit Court ntawm PCB tsim
Qhov cuam tshuam ntawm Circuit Court saum toj no ntawm EMC tuaj yeem xav txog.Cov ntxaij lim dej ntawm cov tswv yim kawg nyob ntawm no;lub siab-pov thawj anti-strikes;qhov tsis kam R102 ntawm qhov cuam tshuam tam sim no (nrog relay txo qhov poob);Y capacitor uas yog lim nrog cov lim dej;lub fuse uas cuam tshuam rau kev ruaj ntseg layout board;txhua yam khoom siv ntawm no tseem ceeb heev.Nws yog ib qho tsim nyog yuav tsum ua tib zoo saj cov haujlwm thiab kev ua haujlwm ntawm txhua lub cuab yeej.Thaum cov qauv tsim hluav taws xob tsim, EMC qib hnyav yog qhov tsim kom muaj kev thaj yeeb nyab xeeb, xws li teeb tsa ob peb theem ntawm kev lim dej, tus lej thiab qhov chaw ntawm tus naj npawb ntawm Y capacitors.Qhov kev xaiv ntawm qhov voltage rhiab heev loj yog ze rau peb qhov kev thov rau EMC.Zoo siab txais tos txhua tus los tham txog qhov yooj yim zoo li EMI circuits ntawm txhua feem.
- 2.Circuit thiab EMC: (Cov neeg paub zoo tshaj plaws los tiv thaiv lub ntiajteb txawj nqus, saib qhov chaw tseem ceeb hauv Circuit Court muaj cov txheej txheem ntawm EMC)
Ob peb ntu ntawm Circuit Court hauv daim duab saum toj no: qhov cuam tshuam rau EMC tseem ceeb heev (nco ntsoov tias qhov ntsuab tsis yog).Piv txwv li, txhua tus paub tias cov hluav taws xob hluav taws xob hluav taws xob hluav taws xob yog qhov chaw, tab sis lub hauv paus ntsiab lus tseem ceeb yog kev hloov pauv ntawm cov hlau nplaum sib nqus., Qhov ntawd yog, cov nplhaib sib txuas hauv Circuit Court.
Qhov tam sim no tuaj yeem tsim tau ib qho chaw sib nqus, uas ua rau lub chaw sib nqus ruaj khov thiab tsis tuaj yeem hloov mus rau qhov hluav taws xob.Lub tshuab hluav taws xob tuaj yeem tsim cov hlau nplaum.Yog li nco ntsoov xyuam xim rau cov chaw uas muaj kev hloov pauv, uas yog, ib qho ntawm EMC.Ntawm no yog ib qho ntawm qhov chaw ntawm EMC (ib qho ntawm no, tau kawg, yuav muaj lwm yam tom qab), xws li cov kab dotted kab hauv Circuit Court, uas yog qhov qhib ntawm lub raj hloov mus qhib lub raj.Lub turbine Circuit Court uas raug kaw tsis tsuas yog tuaj yeem hloov qhov ceev ntawm qhov hloov pauv tuaj yeem kho qhov cuam tshuam ntawm EMC, tab sis thaj tsam ntawm daim ntaub routing Circuit Court kuj muaj qhov cuam tshuam tseem ceeb!Lwm ob lub voj voog yog absorbing nplhaib thiab rectifier Circuit Court, ua ntej nkag siab ua ntej, thiab ces tham txog nws tom qab.
- Thib peb, kev koom tes ntawm PCB tsim thiab EMC
1. Qhov cuam tshuam ntawm PCB voj ntawm EMC yog qhov tseem ceeb heev.Piv txwv li, anti-main fais fab lub nplhaib Circuit Court, yog tias loj heev, cov hluav taws xob yuav tsis zoo.
2. Cov nyhuv lim dej, cov lim dej yog siv los lim kom cuam tshuam, tab sis yog tias PCB muaj cov kab hluav taws xob tsis zoo, lub lim yuav poob cov nyhuv.
3. Cov qauv tsim, tsis zoo - av tsim ntawm lub tshuab hluav taws xob yuav cuam tshuam, cov ntaub thaiv npog hauv av, thiab lwm yam;
4. Qhov rhiab heev yog ze rau qhov chaw cuam tshuam.Piv txwv li, EMI Circuit Court nyob ze rau ntawm lub raj hloov, uas yuav ua rau tsis muaj EMC tsis zoo thiab xav tau qhov chaw sib cais meej.
5. RC nqus lub voj voog.
6. Lub Y capacitor yog hauv av thiab xaim, thiab txoj hauj lwm ntawm Y capacitor kuj tseem ceeb heev.
Cia peb muab ib qho piv txwv me me hauv qab no:
Raws li pom hauv daim duab hauv daim duab saum toj no, X-capacitor tus pin routing yog ua tiav sab hauv.Koj tuaj yeem kawm paub yuav ua li cas ua kom lub capacitor liab caij plug-in (siv lub extrusion tam sim no).Ua li no, cov nyhuv lim dej ntawm X capacitor tuaj yeem ua tiav lub xeev zoo tshaj plaws.
- 4. Kev npaj rau PCB tsim: (Qhov kev npaj yog txaus, tsuas yog tus qauv tsim tuaj yeem tsim los ntawm kauj ruam kom tsis txhob tsim kev cuam tshuam)
Muaj roughly yam ntawm cov nram qab no yam.Nws raug txiav txim siab tias tus txheej txheem tsim yuav raug txiav txim siab.Tag nrho cov ntsiab lus tsis muaj dab tsi ua nrog rau lwm yam kev qhia.Nws tsuas yog cov ntsiab lus ntawm nws tus kheej kev paub.
1. Qhov loj ntawm cov qauv tsim, nrog rau qhov chaw tso tawm, cov pa duct ntws, cov khoom siv thiab cov khoom tso tawm, koj yuav tsum ua kom haum rau cov neeg siv khoom, thiab koj kuj yuav tsum sib txuas lus nrog cov neeg siv khoom, uas yog txwv rau siab.
2. Daim ntawv pov thawj kev nyab xeeb, yam twg yog qhov kev lees paub ntawm cov khoom, qhov chaw twg ua cov txheej txheem rwb thaiv tsev thiab nce qhov deb, thiab qhov twg yuav ntxiv dag zog rau cov rwb thaiv tsev thiab tawm hauv qhov.
3. Ntim tsim: Puas muaj lub sijhawm tshwj xeeb, xws li kev ntim khoom ntim khoom ntim khoom.
4. Xaiv cov txheej txheem txheej txheem: Ib ob chav vaj huam sib luag xaiv, lossis ntau-pab ntsuas sib tw raws li lub xeev daim duab raws li lub npe loj, tus nqi thiab lwm yam kev ntsuam xyuas.
5. Lwm cov kev cai tshwj xeeb rau cov neeg siv khoom.
Kev tsim cov khoom siv tes ua haujlwm yuav hloov tau yooj yim.Cov cai tswj kev ruaj ntseg tseem raug kho.Cov ntawv pov thawj ua li cas, thiab cov qauv kev ruaj ntseg zoo li cas, tau kawg, kuj tseem muaj qee cov kev cai ruaj ntseg uas muaj nyob hauv ntau tus qauv, tab sis kuj muaj qee yam khoom tshwj xeeb xws li kev kho mob.
Yuav kom dazzling, cov phooj ywg ntawm tus tshiab nkag-level engineer tsis dazzling.Nov yog qee cov khoom lag luam uas muaj ntau.Cov hauv qab no yog cov ntaub ntawv tshwj xeeb uas yuav tsum tau ua los ntawm IEC60065.Nyob rau hauv lub siab ntawm kev ruaj ntseg cov cai, koj yuav tsum nco ntsoov.Thaum koj ntsib cov khoom tshwj xeeb, koj yuav tsum nrog nws:
1. Qhov kev ncua deb ntawm cov input fuse pads yog ntau dua 3.0mm.Cov ntaub ntawv tiag tiag yog ntawm 3.5mm (tsuas yog nce lub zog nce siab ntawm 3.5mm ua ntej lub fuse, thiab tom qab ntawd nce lub zog ntawm 3.0mm).
2. Cov cai tswj kev ruaj ntseg ua ntej thiab tom qab tus choj rectification yuav tsum yog 2.0mm, thiab daim ntaub phaj yog 2.5mm.
3. Tom qab rectification, cov kev cai ruaj ntseg feem ntau tsis tas yuav tsum tau, tab sis lub siab thiab qis voltage chav tsev yog sab laug raws li qhov tseeb voltage, thiab tus cwj pwm ntawm 400V yog ntau tshaj 2.0mm.
4. Kev tswj hwm kev nyab xeeb rau qib ua ntej yog 6.4mm (hluav taws xob qhov sib txawv), thiab qhov nce siab yog qhov zoo tshaj plaws raws li 7.6mm (ceeb toom: qhov no muaj feem xyuam rau qhov tseeb input voltage).
5. Siv cov av txias hauv thawj theem thiab qhia meej meej;L, N qhia, cov tswv yim AC Input logo, fuse ceeb toom logo, thiab lwm yam yuav tsum tau cim kom meej.
Txhua tus muaj kev tsis ntseeg txog cov lus saum toj no, kuj tuaj yeem sib tham thiab kawm los ntawm ib leeg.
Ib zaug ntxiv, qhov kev nyab xeeb tiag tiag yog cuam tshuam nrog qhov tseeb input voltage thiab qhov chaw ua haujlwm.Yuav tsum muaj kev suav tshwj xeeb ntawm lub rooj.Cov ntaub ntawv yog muab rau kev siv nkaus xwb thiab lub sijhawm tiag tiag yuav raug rau lub sijhawm tiag tiag.
- 5. PCB tsim kev ruaj ntseg cov cai xav txog lwm yam
1. Nkag siab qhov kev lees paub ntawm koj cov khoom, cov khoom lag luam zoo li cas, xws li kev kho mob, kev sib txuas lus, hluav taws xob, TV, thiab lwm yam, tab sis muaj ntau qhov chaw zoo sib xws.
2. Qhov chaw uas muaj kev ruaj ntseg nyob ze ntawm lub rooj tsavxwm PCB daim ntaub, nkag siab txog cov yam ntxwv ntawm rwb thaiv tsev, uas yog cov rwb thaiv tsev yooj yim, uas yog kev txhim kho rwb thaiv tsev, thiab cov txheej txheem rwb thaiv tsev sib txawv sib txawv.Nws yog qhov zoo tshaj plaws los xyuas cov qauv, thiab ntsuas hluav taws xob nyob deb thiab qhov kev ncua deb yog nce.
3. Tsom ntsoov rau cov cuab yeej kev ruaj ntseg ntawm cov khoom, xws li kev sib raug zoo ntawm transformer magnetism thiab tus thawj tswj hwm ciam teb.
4. Lub dab dej kub thiab qhov chaw nyob deb, thaj av txuas nrog lub tshuab hluav taws xob sib txawv, thaj av tsis zoo ib yam, av tseem txias, thiab cov av kub rwb thaiv tsev yog tib yam.
5. Kev saib xyuas tshwj xeeb rau kev tuav pov hwm nyob deb, yuav tsum muaj qhov chaw nruj tshaj plaws.Qhov kev ncua deb ntawm lub fuse yog zoo ib yam.
6. Y capacitor thiab to tam sim no, tiv tauj tam sim no kev sib raug zoo.
Kev ua raws li yuav piav qhia yuav ua li cas kom qhov kev ncua deb thiab yuav ua li cas thiaj li ua kom muaj kev ruaj ntseg.
- 6. Fais fab layout ntawm PCB tsim
1. Ua ntej, ntsuas qhov luaj li cas ntawm PCB qhov loj thiab cov khoom siv, kom tuab, txwv tsis pub nws yuav nruj, thiab nws tsis yooj yim kom pom ib qho sparseness.
2. Hloov kho lub voj voog, tsom mus rau cov khoom siv tseem ceeb, thiab lub hauv paus ntsiab lus ntawm cov cuab yeej tseem ceeb tso lub cuab yeej rau ib zaug.
3. Cov cuab yeej yog ntsug lossis kab rov tav.Ib qho yog qhov zoo nkauj, thiab lwm qhov yog los pab txhawb kev ua haujlwm plug-in.Cov xwm txheej tshwj xeeb tuaj yeem txiav txim siab.
4. Thaum layout, koj yuav tsum xav txog cov xaim thiab muab tso rau hauv qhov chaw tsim nyog tshaj plaws thiab ua kom yooj yim rau txoj kab taug qab.
5. Thaum lub sij hawm layout, lub nplhaib cheeb tsam yog txo kom ntau li ntau tau, thiab plaub lub nplhaib loj txoj kev yuav tau piav qhia nyob rau hauv kom meej.
Yuav kom ua tiav cov ntsiab lus saum toj no, ntawm chav kawm, nws yog ib qho tsim nyog yuav tsum siv nws yooj yim, thiab qhov tsim nyog tsim nyog yuav tshwm sim sai sai.
Cov hauv qab no yog PCB pawg thawj coj saib, uas tsim nyog kawm los ntawm cov txheej txheem dav dav:
Lub zog ceev ntawm daim duab no tseem yog qhov siab.Ntawm lawv, qhov kev tswj hwm ntawm LLC, qhov chaw pab cuam, thiab BUCK Circuit Court tsav (siab-power multi-road output) yog nyob rau ntawm lub rooj tsavxwm me.
1. Lub input thiab output terminals yog tsau thiab tuag.txav tsis tau.Lub rooj tsavxwm yog rectangular.Yuav ua li cas xaiv lub ntsiab fais fab txaus?Ntawm no, los ntawm hauv qab mus rau sab saum toj, los ntawm sab laug thiab sab xis rau layout, cua sov dissipation nyob ntawm lub plhaub.
2. Lub voj voog EMI tseem pom tseeb.Qhov no tseem ceeb heev.Yog tias nws tsis meej pem, nws tsis zoo rau EMC.
3. Txoj hauj lwm ntawm cov capacitors loj yuav tsum tau coj mus rau hauv tus account PFC lub voj voog thiab lub voj voog loj ntawm LLC.
4. Tam sim no ntawm lub koom haum pab ntug yog qhov loj.Txhawm rau coj cov tam sim no thiab cov cua kub dissipation ntawm cov yeeb nkab rectifier, qhov kev teeb tsa no tau txais yuav.Cov yeeb nkab rectifier yog nyob rau saum.xwb.
Txhua lub rooj tsavxwm muaj nws tus yam ntxwv, thiab tau kawg nws muaj nws qhov nyuaj.Yuav ua li cas los daws qhov laj thawj yog qhov tseem ceeb.Koj puas tuaj yeem nkag siab lub ntsiab lus ntawm kev xaiv tsim nyog ntawm kev teeb tsa?
- 7. PCB piv txwv txaus siab
Raws li PCB layout ntawm lub yav dhau los tham txog PCB layout, xyuas lub rooj tsavxwm no, seb nws yog nyob rau hauv qhov chaw, kuv xav tias nws yog ib qhov chaw zoo dua.Ntawm chav kawm, cov flaws yuav yeej ib txwm muaj.Koj tseem tuaj yeem tawm tswv yim.Nws tsis yooj yim, koj tuaj yeem kawm los ntawm lub rooj tsavxwm no!Tom qab ntawd, koj tseem yuav piav qhia thiab kawm txog lub rooj tsavxwm no.Cia peb txaus siab ua ntej.
- 8. plaub lub nplhaib loj txoj kev ntawm PCB tsim (qhov yuav tsum tau ua ntawm lub PCB layout yog qhov me me ntawm plaub lub nplhaib loj circuits)
Tsis tas li ntawd, lub nplhaib nqus (RCD nqus thiab RC nqus ntawm MOS raj, RC nqus ntawm cov kav dej rectifier) kuj tseem ceeb heev, thiab nws tseem yog lub voj uas tsim hluav taws xob ntau zaus.Yog tias koj muaj lus nug saum toj no, koj tuaj yeem tham nrog nws.Tsuav nws raug nug nrog cov lus nug, kev sib tham txog kev kawm ua ke tuaj yeem ua tau zoo dua!
