MuTthe EMC dhizaini ye PCB, chekutanga kunetsekana ndiko kuisa kwegadziriro; Iwo akaturikidzana ebhodhi anoumbwa nemagetsi, pasi rukoko uye chiratidzo chesaini. Mune EMC dhizaini yezvigadzirwa, kunze kwekusarudzwa kwezvikamu uye dhizaini dhizaini, yakanaka pcb dhizaini zvakare yakakosha chinhu.

Iko kiyi kune EMC dhizaini yePBB ndeyekuderedza nzvimbo yekudzokera shure uye kuita nzira yekudzokera kumashure kuyerera munzira yatakagadzira. Dhizaini dhizaini ndiyo hwaro hwePBB, maitiro ekuita basa rakanaka rePCB rukoko dhizaini yekuita iyo EMC mhedzisiro yePCB yakakwana?

I. Dhizaini mazano ePCB rukoko

Iyo yakakosha pcb laminated EMC kuronga uye dhizaini zvine musoro kuronga chiratidzo backflow nzira yekudzora backflow nzvimbo yechiratidzo kubva kubhodhi girazi yakaturikidzana, kuitira kubvisa kana kudzikisa magnetic flux.

Bhodhi rimwe chete mirroring layer

Iyo girazi yakaturikidzana yakazara yakazara yemhangura-yakaputirwa nendege nhete (magetsi emagetsi, pasi pevhu) padhuze necheni yechiratidzo mukati mePCB. Mabasa makuru ndeanotevera:

(1) Deredza kudzoka kweruzha ruzha: girazi redenderedzwa rinogona kupa yakaderera impedance nzira yeiyo chiratidzo denderedzwa backflow, kunyanya kana paine hombe kuyerera kwazvino musimba rekugovera system, iro basa regirazi dara rinonyanya kuoneka.

(2) EMI kuderedzwa: kuvapo kwegirazi yakaturikidzana kunoderedza nzvimbo yeyakavharwa chiuno chakaumbwa nechiratidzo uye reflux uye inoderedza EMI;

(3) kuderedza crosstalk: batsira kudzora chinetso checrosstalk pakati pemitsara yemasaini mune yakakwira-kumhanya yedhijitari wedunhu, chinja kukwirira kwetambo yechiratidzo kubva pagirazi redenga, unogona kudzora crosstalk pakati pemitsara yemasaini, idiki kureba, idiki crosstalk;

(4) Impedance kudzora kudzivirira chiratidzo chiratidzo.

Sarudzo yegirazi rukoko

(1) Zvese magetsi uye iyo yepasi ndege inogona kushandiswa senge inongedzo ndege, uye iine imwe yekudzivirira maitiro kune yemukati wiring;

(2) Zvichitaurwa kutaura, iyo ndege yemagetsi ine yakakwira mamirire impedance, uye pane musiyano wakakura ungangoita pamwe nereferensi nhanho, uye iyo yepamusoro-frequency kukanganiswa kwendege yemagetsi kwakati kurei;

(3) Kubva pakuona kwekudzivirira, iyo ndege yepasi inowanzo pasi uye inoshandiswa senzvimbo yekutarisisa yereferensi nhanho, uye maitiro ayo ekudzivirira ari nani kwazvo kupfuura iyo ndege yemagetsi;

(4) Kana uchisarudza iyo inongedzera ndege, iyo yepasi ndege inofanirwa kusarudzwa, uye ndege yemagetsi inofanira kusarudzwa yechipiri

Mbiri, magnetic flux kukanzura musimboti

Zvinoenderana nekuenzana kwaMaxwell, zvese zvemagetsi uye zvemagineti zvinoitika pakati pemitumbi yakapatsanurwa kana mafashama zvinopfuudzwa kuburikidza nenzvimbo yepakati pakati pavo, kungave kuri bvunzo kana chinhu chakasimba. Mune pcb, kuyerera kunogara kuchiparadzirwa mumutsetse wekutapurirana. Kana iyo rf yekudzokera shure nzira ichienderana nenzira inoenderana yechiratidzo, kuyerera munzira yekudzoka kuri munzira yakatarisana neiyo iri munzira yemasaini, saka ivo vanoiswa pamusoro peumwe neumwe, uye mhedzisiro yekukanzurwa kwekuyerera kunowanikwa.

Hunhu hwemagineti flux kukanzura

Musimboti wekudzima kubuda ndiko kudzora kwenzira yekudzokera kumashure, sezvakaratidzwa mumufananidzo unotevera:

Weruoko rwerudyi mutemo unotsanangura iyo magnetic flux kukanzura mhedzisiro

Mashandisiro ekushandisa ruoko rwerudyi kutonga kutsanangura iyo yemagineti flux kukanzura mhedzisiro kana chiratidzo chejira chiri padhuze netambo chakatsanangurwa seinotevera:

(1) Kana yazvino ichiyerera netambo, iyo yemagineti inogadzirwa yakatenderedza waya, uye iko kunongedzera kwemagineti munda kunoonekwa nemutemo weruoko rwerudyi.

(2) kana paine maviri padhuze nepadhuze uye akafanana netambo, sezvakaratidzwa mumufananidzo uri pazasi, mumwe wevatakuri vemagetsi kubuda, mumwe wacho conductor yemagetsi kuyerera, kana magetsi achiyerera nepakati waya ndezvezvino uye yadzo yazvino yekudzoka chiratidzo, ipapo iwo maviri akatarisana nedivi razvino akaenzana, saka yavo yemagineti yakaenzana, asi iyo nzira yakatarisana,Saka vanoregererana kunze.

Shanu, matanhatu bhodhi dhizaini mienzaniso

Kwematanhatu matanhatu, kuronga 3 kunosarudzwa

Analysis:

(1) Sezvo rukoko rwechiratidzo rwuri padyo neiyo reflow rezve ndege, uye S1, S2 uye S3 zviri padyo nepasi ndege, yakanakisa magnetic flux kukanzura mhedzisiro inowanikwa. Naizvozvo, S2 ndiyo yakasarudzika nzira yekutenderera, inoteverwa neS3 uye S1.

(2) Ndege yemagetsi iri padyo nendege yeGND, chinhambwe pakati pendege idiki kwazvo, uye ine yakanakisa magnetic flux kukanzura mhedzisiro uye yakaderera simba ndege indedance.

(3) Simba guru rekushandisa nemachira aro epasi zvinoenderana nechetatu uye 4. Kana ukobvu hwedenga hwaiswa, nzvimbo iri pakati peS5-P inofanirwa kuwedzerwa uye nzvimbo iri pakati peP-G2 inofanira kuderedzwa (nzvimbo iri pakati pepakati G2-S1 inofanirwa kudzikiswa zvakaenzana), kuitira kuti idzikise impedance yendege yemagetsi uye simba remagetsi paS2.

Kwematanhatu matanhatu, sarudzo 4

Analysis:

Scheme 4 inonyanya kukodzera kupfuura Scheme 3 yenzvimbo, diki yezvidimbu zvemasaini, izvo zvinogona kupa yakanakisa wiring rukoko S2.

Zvakaipisisa EMC kuita, kuronga 2

Analysis: Muchimiro ichi, S1 uye S2 zviri padyo, S3 uye S4 zviri padyo, uye S3 uye S4 havasi padyo nepasi ndege, saka iyo magnetic flux kukanzura mhedzisiro iri murombo.

kugumisa

Dzakananga misimboti pcb rukoko dhizaini:

(1) Kune yakakwana ndege yepasi (nhovo) pazasi pechinhu chepamusoro uye pamusoro penzvimbo;

(2) Edza kudzivirira yakanangana padhuze nematanho maviri echiratidzo;

(3) Matanho ese echiratidzo ari padyo nendege yepasi sezvinobvira;

(4) Wiring yakaturikidzana yeakakwira frequency, kumhanya kwakanyanya, wachi uye mamwe makiyi masaini anofanirwa kuve needu yepasi ndege.