Txhawm rau kom ua tiav qhov kev ua tau zoo tshaj plaws ntawm cov hluav taws xob hluav taws xob, kev teeb tsa ntawm cov khoom siv thiab kev sib txuas ntawm cov xov hlau tseem ceeb heev.Txhawm rau tsim aPCBnrog cov khoom zoo thiab tus nqi qis.Cov hauv paus ntsiab lus hauv qab no yuav tsum ua raws li:
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Ua ntej, xav txog qhov loj ntawm PCB.Yog tias PCB loj dhau lawm, cov kab luam tawm yuav ntev, qhov impedance yuav nce, lub peev xwm los tiv thaiv lub suab nrov yuav txo qis, thiab tus nqi kuj yuav nce ntxiv;yog tias nws me dhau lawm, cov cua kub dissipation yuav tsis zoo, thiab cov kab uas nyob ib sab yuav yooj yim cuam tshuam.Tom qab txiav txim siab PCB loj, txiav txim siab qhov chaw ntawm cov khoom tshwj xeeb.Thaum kawg, raws li kev ua haujlwm ntawm lub tshuab hluav taws xob, tag nrho cov khoom ntawm lub voj voog raug tso tawm.
Thaum txiav txim siab qhov chaw ntawm cov khoom tshwj xeeb, cov hauv qab no yuav tsum tau ua raws:
① Txo qhov kev sib txuas ntawm cov khoom siv hluav taws xob ntau ntau li ntau tau, thiab sim txo lawv cov kev faib tawm thiab kev cuam tshuam ntawm electromagnetic cuam tshuam.Cheebtsam uas raug cuam tshuam los ntawm kev cuam tshuam tsis tuaj yeem nyob ze rau ib leeg, thiab cov khoom nkag thiab cov khoom tawm yuav tsum tau khaws cia kom deb li deb tau.
② Tej zaum yuav muaj qhov sib txawv ntawm qee cov khoom lossis cov xov hlau, thiab qhov kev ncua deb ntawm lawv yuav tsum tau nce ntxiv kom tsis txhob muaj kev sib tsoo luv luv los ntawm kev tso tawm.Cheebtsam nrog high voltage yuav tsum tau teem nyob rau hauv qhov chaw uas tsis yooj yim mus cuag los ntawm txhais tes thaum debugging.
③ Cheebtsam uas hnyav tshaj 15 g yuav tsum tau kho nrog brackets thiab ces welded.Cov khoom uas loj, hnyav, thiab tsim kom muaj cua sov ntau yuav tsum tsis txhob muab ntsia rau ntawm daim ntawv luam tawm, tab sis yuav tsum tau muab ntsia rau ntawm lub chassis hauv qab phaj ntawm tag nrho lub tshuab, thiab qhov teeb meem ntawm cov cua kub dissipation yuav tsum tau txiav txim siab.Thermal Cheebtsam yuav tsum khaws cia kom deb ntawm cov khoom cua sov.
④ Rau qhov kev teeb tsa ntawm cov khoom siv kho tau xws li potentiometers, hloov kho inductance coils, hloov pauv hloov pauv, thiab micro hloov pauv, cov qauv tsim ntawm tag nrho lub tshuab yuav tsum raug txiav txim siab.Yog tias nws raug kho hauv lub tshuab, nws yuav tsum muab tso rau ntawm lub rooj tsavxwm uas nws yooj yim rau kev hloov kho;yog tias nws raug kho sab nraum lub tshuab, nws txoj hauj lwm yuav tsum tau hloov mus rau txoj hauj lwm ntawm kev hloov kho pob qhov rooj ntawm lub chassis vaj huam sib luag.
Raws li kev ua haujlwm ntawm lub voj voog, thaum tso tawm tag nrho cov khoom ntawm lub voj voog, cov hauv qab no yuav tsum tau ua raws li:
①Tau qhov chaw ntawm txhua qhov chaw ua haujlwm hauv Circuit Court raws li qhov ntws ntawm lub voj voog, kom qhov kev teeb tsa yooj yim rau cov teeb liab ncig, thiab cov kev taw qhia ntawm lub teeb liab yog khaws cia raws li qhov ua tau.
② Siv cov khoom tseem ceeb ntawm txhua qhov kev ua haujlwm ua haujlwm ua qhov chaw nruab nrab thiab ua qhov chaw nyob ib puag ncig nws.Cov Cheebtsam yuav tsum sib npaug, zoo huv si thiab compactly kos rau ntawm PCB, txo qis thiab txo cov kev coj thiab kev sib txuas ntawm cov khoom.
③ Rau cov khoom siv hluav taws xob ua haujlwm ntawm cov khoom siv hluav taws xob ntau, qhov kev faib tawm ntawm cov khoom yuav tsum raug txiav txim siab.Feem ntau, lub voj voog yuav tsum npaj cov khoom sib luag kom ntau li ntau tau.Nyob rau hauv txoj kev no, nws tsis yog tsuas yog zoo nkauj, tab sis kuj yooj yim rau assemble thiab weld, thiab yooj yim rau loj tsim.
④ Cov khoom nyob rau ntawm ntug ntawm lub rooj tsavxwm Circuit Court feem ntau tsis pub tsawg tshaj 2 hli ntawm ntug ntawm lub rooj tsavxwm.Qhov zoo tshaj plaws zoo rau lub rooj tsav xwm Circuit Court yog ib lub duab plaub.Qhov sib piv yog 3: 2 lossis 4: 3.Thaum qhov luaj li cas ntawm lub rooj tsav xwm hauv Circuit Court yog ntau dua 200 mm✖150 mm, lub zog txhua yam ntawm lub rooj tsavxwm yuav tsum tau txiav txim siab.
kab hluav taws xob
Cov ntsiab cai yog raws li nram no:
① Cov xov hlau siv ntawm cov khoom siv nkag thiab cov khoom siv tawm yuav tsum tsis txhob nyob ib sab thiab sib npaug rau ib leeg kom ntau li ntau tau.Nws yog qhov zoo tshaj los ntxiv cov av xaim ntawm cov kab kom tsis txhob tawm tswv yim sib txuas.
② Qhov dav tsawg kawg nkaus ntawm cov ntawv luam tawm Circuit Board hlau yog tsuas yog txiav txim siab los ntawm lub zog adhesion ntawm cov hlau thiab cov insulating substrate thiab cov nqi tam sim no ntws los ntawm lawv.
Thaum lub thickness ntawm cov ntawv ci tooj liab yog 0.05 hli thiab qhov dav yog 1 txog 15 hli, qhov kub yuav tsis siab tshaj 3 ° C los ntawm qhov tam sim no ntawm 2 A, yog li qhov dav ntawm cov hlau yog 1.5 hli kom tau raws li qhov yuav tsum tau ua.Rau kev sib xyaw ua ke, tshwj xeeb tshaj yog cov digital circuits, cov hlau dav ntawm 0.02-0.3 hli feem ntau yog xaiv.Tau kawg, kom deb li deb tau, siv cov xaim dav dav, tshwj xeeb tshaj yog lub zog thiab hauv av xaim.
Qhov tsawg kawg nkaus qhov sib txawv ntawm cov conductors feem ntau yog txiav txim siab los ntawm qhov phem tshaj plaws rwb thaiv tsev tsis kam ntawm cov kab thiab qhov tawg voltage.Rau kev sib xyaw ua ke, tshwj xeeb tshaj yog digital circuits, ntev npaum li cov txheej txheem tso cai, lub suab tuaj yeem ua me me li 5-8 um.
③ Cov ces kaum ntawm cov xov hlau luam tawm feem ntau yog arc-puab, thaum lub kaum sab xis lossis cov kaum sab xis yuav cuam tshuam rau kev ua haujlwm hluav taws xob hauv cov hluav taws xob ntau zaus.Tsis tas li ntawd, sim kom tsis txhob siv qhov loj ntawm cov ntawv ci tooj liab, txwv tsis pub, thaum rhuab rau lub sijhawm ntev, nws yooj yim ua rau cov ntawv ci tooj liab nthuav dav thiab poob.Thaum ib cheeb tsam loj ntawm cov ntawv ci tooj liab yuav tsum tau siv, nws yog qhov zoo tshaj plaws los siv cov kab sib chaws, uas yog qhov zoo rau kev tshem tawm cov roj uas tsis muaj hluav taws xob tsim los ntawm cov nplaum ntawm cov ntawv ci tooj liab thiab cov substrate thaum rhuab.
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Lub qhov nruab nrab ntawm lub ncoo yog me ntsis loj dua li txoj kab uas hla ntawm cov khoom siv lead ua.Yog tias lub ncoo loj dhau lawm, nws yooj yim los tsim ib qho kev sib koom ua ke virtual.Sab nraud txoj kab uas hla D ntawm lub ncoo feem ntau tsis tsawg tshaj li d + 1.2 hli, qhov twg d yog lub qhov taub txoj kab uas hla.Rau high-density digital circuits, qhov tsawg kawg nkaus txoj kab uas hla ntawm lub ncoo tuaj yeem yog d + 1.0 mm.
PCB board software editing
Post lub sij hawm: Mar-13-2023