Pcb dhizaini

Mune chero chinjana chinogadzira magetsi dhizaini, iro dhizaini dhizaini yeiyo Pcb bhodhi is the last link. If the design method is improper, the PCB may radiate too much electromagnetic interference, resulting in the unstable work of the power supply. The following is an analysis of the matters needed to pay attention to in each step.

Kubva schematic dhayagiramu kuPCB dhizaini maitiro

Set up component parameters – > Input principle netlist – > Dhizaini paramende yekumisikidza -> Kurongeka kwechinyorwa -> Manual cabling – > Simbisa dhizaini -> Ongorora – & gt; CAM yakabuda.

Parameter Zvirongwa

Musiyano uripakati pewaya dziri padhuze unofanirwa kusangana nezvinodiwa zvekuchengetedza magetsi, uye kuitira kuti mashandiro nekugadzirwa zvivepo, nzvimbo yacho inofanira kunge yakafara sezvinobvira. The minimum spacing should be suitable for the voltage at least. When the wiring density is low, the spacing of signal lines can be appropriately increased. For the signal lines with high and low level disparity, the spacing should be as short as possible and the spacing should be increased.

Iyo nhambwe iri pakati pemucheto wehomwe yemukati yepad uye kumucheto webhodhi rakadhindwa rinofanira kuve rakakura kupfuura 1mm kudzivirira kuremara kwepad panguva yekugadzira. Kana iyo waya yakabatana nepad iri yakatetepa, kubatana kuri pakati pepadhe netambo yakagadzirirwa kuita dhonhwe. Chakanakira ndechekuti padhi yacho haisi nyore kubvarura, asi waya nepad hazvisi nyore kutsemura.

Component layout

Practice has proved that even if the circuit schematic design is correct and the printed circuit board design is improper, the reliability of electronic equipment will be adversely affected.

For example, if two thin parallel lines of a printed board are close together, there will be a delay in the signal waveform, resulting in reflected noise at the end of the transmission line. Iko kukanganiswa kunokonzerwa nemagetsi uye waya wevhu kunodzikisira mashandiro echigadzirwa. Naizvozvo, kana uchigadzira rakadhindwa redunhu bhodhi, kutarisisa kunofanirwa kubhadharwa kunzira chaiyo.

Imwe neimwe inoshandura magetsi ine zvishwe zvina zvazvino.

① Ac circuit of power switch

② Output rectifier AC redunhu

Input chiratidzo sosi yazvino chiuno

④ Kuburitsa mutoro wazvino chiuno Chekuisa chiuno

Nekuchaja iyo yekuisa capacitor neinofungidzirwa dc yazvino, iyo firita capacitor inonyanya kuita chinzvimbo cheyakafara Broadband simba chengetedzo. Saizvozvowo, kuburitsa firita capacitors anoshandiswa kuchengetera yakakwira frequency simba kubva kune inoburitsa inogadzirisa ichitora dc simba kubva kune inobuda mutoro chiuno.

Naizvozvo, zviteshi zvewiring zvekuisa uye zvinoburitsa firita capacitors zvakakosha kwazvo. Iyo yekuisa uye yekubuda izvozvi zvishwe zvinofanirwa kuve zvakabatana kune magetsi magetsi chete kubva kumatambo ewiring eiyo firita capacitor zvakateerana. Kana iko kubatana pakati pekupinza / kuburitsa dunhu uye nemagetsi switch / rectifier wedunhu isingakwanise kuve yakabatana zvakananga kune iyo capacitor’s terminal, ac simba richapfuura nekuisa kana kuburitsa firita capacitor uye inopenya mukati memamiriro ezvinhu.

Iwo mac macircuit emagetsi ekushandura switch uye iyo inogadziridza ine yakakwira-amplitude trapezoidal mairi, ayo ane yakakwira harmonic chinhu uye frequency yakakwira zvakanyanya kupfuura yakakosha frequency yeiyo switch. Iyo yepamusoro amplitude inogona kusvika kusvika kashanu iyo yekuenderera yekupinda / kuburitsa dc ikozvino. Iyo yekuchinja nguva inowanzo kuve makumi mashanu.

Iwo macircuit maviri anogona kunge achigadzira magetsi emagetsi, saka imwewo wiring yakadhindwa mune simba sosi yekumachira pamberi peaya mac macircuit, chiuno chimwe nechimwe chikuru zvinhu zvefaera capacitor, switch yemagetsi kana kugadzirisa, inductor kana transformer ichaiswa padhuze kune mumwe nemumwe, chinja iyo yazvino nzira pakati pechinzvimbo chinzvimbo chiveita ipfupi sezvinobvira.

Nzira yakanakisa yekumisikidza switching magetsi emagetsi yakafanana nemagadzirirwo emagetsi, akanakisa dhizaini iri seinotevera:

① Isa transformer

② Dhizaina switch yemagetsi yazvino

③ Dhizaina iyo inoburitsa inogadzirisa yazvino chiuno

Control Iyo redhiyo redhiyo yakabatana ne AC magetsi magetsi wedunhu

wiring

Simba rekuchinja rine chiratidzo chepamusoro, uye chero mutsetse wakadhindwa paPCB unogona kuita seantena. Iyo kureba uye upamhi hwemutsara wakadhindwa unokanganisa iyo impedance uye inductive reaction, zvichidaro zvichikanganisa iyo frequency mhinduro. Kunyangwe mitsara yakadhindwa inopfuura nemasaini eDC inogona kubatanidzwa kune rf zviratidzo kubva padyo nemitsara yakadhindwa uye inokonzeresa matambudziko wedunhu.

Yese mitsara yakadhindwa inomhanya kuburikidza neac yazvino inofanira kugadzirirwa kuve ipfupi uye yakafara sezvinobvira, zvinoreva kuti zvinhu zvese zvakabatana nemitsara yakadhindwa uye kune mamwe magetsi tambo zvinofanirwa kuiswa padhuze pamwechete.

Kureba kwetambo yakadhindwa kunoenzanirana zvakananga neiyo inductance uye impedance, uye iyo upamhi inopesana zvakaenzana kune inductance uye impedance yemutsara wakadhindwa. Kureba kunoratidza kureba kwemhinduro yemutsara wakadhindwa. Kureba kureba, kudzikira kweiyo tambo yakadhindwa inogona kutumira uye kugamuchira magetsi emagetsi, uye iyo yakawanda rf simba iyo yainogona kubuda.

Zvinoenderana nesaizi yeiyo yakadhindwa redunhu bhodhi yazvino, kusvika pazvinogona kuwedzera upamhi hwetambo yemagetsi, kudzikisa kuramba kwechiuno. Panguva imwecheteyo, gadzira tambo yemagetsi, mutsara wepasi uye nongedzo yazvino inoenderana, iyo inobatsira kusimudzira kugona-kurira kweruzha.

Kuvhundutsa ibazi rezasi remaseketi mana aripo ekuchinja magetsi, iro rinoita basa rakakosha senzvimbo inozivikanwa yedunhu, uye inzira yakakosha yekudzora kupindirana. Naizvozvo, nyatso tarisa tambo dzekumisikidza mudanho. Kusanganisa tambo dzevhu dzinogona kukonzera kusagadzikana kwemagetsi.

cheki

Wiring dhizaini yapera, zvakafanira kuti nyatsoongorora iyo wiring dhizaini nevakagadziri inoenderana nemitemo, inotonga panguva imwechete inodawo kusimbisa kana ichienderana nechinodiwa chePBB yekugadzira maitiro, yakajairika yekuongorora tambo kune mutsetse, tambo uye chinhu chekubatanidza pad, iyo tambo uye inotaurirana pores, element yekubatanidza pad uye kutaurirana pores, kuburikidza gomba uye chinhambwe pakati pegomba kuburikidza gomba zvine musoro, kunyangwe kusangana nezvinogadzirwa zvinodiwa.

Kunyangwe hupamhi hwetambo yemagetsi netambo yepasi yakakodzera, uye kana paine nzvimbo yekuti pasi tambo iwedzerwe muPCB. Ongorora: Zvimwe zvikanganiso zvinogona kufuratirwa, semuenzaniso, chikamu cheOutline yezvimwe zvinongedzo zvinoiswa kunze kwebhodhi furemu, saka zvinenge zvisina kunaka kutarisa nzvimbo; Mukuwedzera, mushure mekushandurwa kwega kwega uye gomba, zvakafanira kupfeka zvekare mhangura kamwe.

Ongorora zvinoenderana ne “PCB checklist”, inosanganisira dhizaini dhizaini, dudziro dudziro, mutsetse upamhi, nzvimbo, mapads, maburi masisitimu, asi zvakare tarisa pakuwongorora kwehunhu hwegadziriro yedhijitari, magetsi, kumisikidza wiring network, yakakwira-mhanyisa wachi network wiring uye inodzivirira, kudzora capacitor kuiswa uye kubatana.

Dhizaini kuburitsa

Mazano ekuburitsa mwenje kudhirowa mafaera:

(1) Inoda kuburitsa rukoko wiring dura (pasi), skrini yekudhinda dhizaini (inosanganisira yepamusoro skrini yekudhinda, yepasi chidzitiro kudhinda), yakatwasuka dura (pasi kuwira), kuchera dura (pasi), mukuwedzera kuburitsa kuchera faira (NC Drill)

② Kana uchimisikidza iyo Layer yeiyo skrini yekudhinda Layer, usasarudze Chikamu Rudzi, sarudza iyo Outline, Chinyorwa uye Mutsetse wepamusoro (pasi) uye skrini yekudhinda Layer

Paunenge uchimisikidza rukoko rwega roga roga, sarudza Bhodhi Rekunze. Paunenge uchimisikidza Rukoko rwechidzitiro chekudhinda Layer, usasarudze Chikamu Rudzi, uye sarudza iyo Outline uye Chinyorwa chepamusoro (pasi) uye skrini yekutsikisa Layer..