Kuyilo lwe-EMC PCB, inkxalabo yokuqala kukuseta kobeko; Imaleko yebhodi yenziwe ngombane, maleko komhlaba kunye nophawu lomqondiso. Kuyilo lwe-EMC lweemveliso, ngaphandle kokukhethwa kwezinto kunye nokuyilwa kwesekethe, uyilo lwePCB elungileyo lukwayinto ebaluleke kakhulu.

Isitshixo kuyilo lwe-EMC ye-PCB kukunciphisa indawo yokubuyela umva kwaye yenze indlela yokuhamba kobuya umva kwicala esalilungiselela. Uyilo lomaleko sisiseko sePCB, indlela yokwenza umsebenzi olungileyo woyilo lobeko lwePCB ukwenza isiphumo se-EMC sePCB ngokugqibeleleyo?

Iingcamango zoyilo lobungakanani bePCB:

Isiseko sePCB elaminethiweyo yokucwangciswa kwe-EMC kunye noyilo kukucwangcisa ngokusesikweni umendo wokubuya umda ukunciphisa indawo yokubuyela umva komqondiso ukusuka kumaleko esipili sebhodi, ukuphelisa okanye ukunciphisa ukubhobhoza kwemagnethi.

1. Ibhodi yokulinganisa imaleko

Umaleko wesipili ngumaleko opheleleyo womaleko wenqwelomoya osale ubhedu (umaleko wokuhambisa umbane, umaleko womhlaba) omelene nophawu lomqondiso ngaphakathi kwePCB. Eyona misebenzi iphambili ilandelayo:

(1) Ukunciphisa ingxolo yokuhamba kwakhona: umaleko wesipili unokubonelela ngendlela ephantsi yokubuyela umva kuphawu lokuhamba kwakhona komqondiso, ngakumbi xa kukho ukuhamba ngoku okukhulu kwinkqubo yokuhambisa amandla, indima yomaleko wesipili ucacile.

(2) Ukuncitshiswa kwe-EMI: ubukho besingqimba sesipili sinciphisa indawo yeluphu evaliweyo eyenziwe ngumqondiso kunye neflux kwaye inciphisa i-EMI;

(3) ukunciphisa crosstalk: ukunceda ukulawula ingxaki crosstalk phakathi kwemigca uphawu ngesantya esiphezulu wesekethe yedijithali, ukutshintsha ukuphakama komgca uphawu ukusuka umaleko esipilini, uyakwazi ukulawula crosstalk phakathi kwemigca uphawu, ezincinane ukuphakama, ezincinane umnqamlezo;

(4) Ulawulo lokuthintela ukuthintela ukubonakaliswa komqondiso.

Ukukhethwa kwesipili

(1) Zombini unikezelo lwamandla kunye nenqwelomoya yasemhlabeni inokusetyenziswa njengesixhobo sokubonisa, kwaye ineziphumo ezithile zokukhusela kwintambo yangaphakathi;

(2) Sithetha nje, inqwelomoya inesiphene esineempawu eziphezulu, kwaye kukho umahluko omkhulu ekunokubakho kuwo nenqanaba lesalathiso, kunye nokuphazamiseka okuhamba rhoqo kwinqwelomoya amandla amakhulu;

(3) Ngokwembono yokukhuselwa, inqwelomoya yomhlaba iphantsi kwaye isetyenziswe njengendawo ekubhekiswa kuyo kwinqanaba lesalathiso, kwaye isiphumo sayo sokukhusela silunge ngakumbi kuneso senqwelomoya;

(4) Xa ukhetha inqwelomoya, inqwelomoya yomhlaba kufuneka ikhethwe, kwaye inqwelomoya kufuneka ikhethwe okwesibini.

Umgaqo wokucinywa kokukhutshwa kwemagnetic:

Ngokwezibalo zikaMaxwell, zonke izinto ezisebenza ngombane kunye nemagneti phakathi kwemizimba eyahlukeneyo ehlawulweyo okanye imisinga idluliswa ngommandla ophakathi kwabo, nokuba kungumshini okanye into eqinileyo. Kwi-PCB, ukubhobhoza kuhlala kusasazeka kumgca wokuhambisa. Ukuba indlela yokubuyela umva ye-rf iyahambelana nendlela yomqondiso ohambelanayo, ukuhamba kwindlela yokubuyela umva kwicala elichaseneyo nakwindlela yomqondiso, emva koko zibekwe zodwa, kwaye isiphumo sokurhoxiswa kokuhamba kuyafumaneka.

Umongo wokucinywa kokuhamba kukulawulwa kwendlela yokubuyela umva komqondiso, njengoko kubonisiwe kulo mzobo ulandelayo:

Uwusebenzisa njani umthetho wesandla sasekunene ukuchaza ukusebenza kokucinywa kwemagneti xa umaleko wesiginali ukufutshane nomtya uchazwa ngolu hlobo lulandelayo:

(1) Xa ukuhamba ngoku kuhamba ngocingo, umhlaba wemagnethi uya kwenziwa ujikeleze ucingo, kwaye ulwalathiso lwentsimi yemagnethi lumiselwe ngumgaqo wesandla sasekunene.

(2) xa zimbini zisondelelene kwaye zihambelana nocingo, njengoko kubonisiwe kumfanekiso ongezantsi, omnye wabaqhubi bombane ukukhupha amanzi, omnye umbhexeshi wombane oza kuhamba, ukuba umbane uhamba Ucingo lukho ngoku kwaye lubuyise umqondiso wangoku, emva koko la macala mabini ahambelanayo ngoku alinganayo, ke amandla abo ombane ayalingana, kodwa icala lijongene,Ke bayarhoxisana.

Umzekelo wesithandathu webhodi yoyilo

1. Kwiipleyiti ezingqimba ezintandathu, isikimu 3 siyakhethwa;

Uhlalutyo:

(1) Njengokuba umaleko wesiginali ukufutshane nenqwelomoya yokujonga kwakhona, kwaye i-S1, i-S2 kunye ne-S3 zikufuphi nenqwelomoya yomhlaba, eyona nto ifanelekileyo yokurhoxisa umbane ifezekisiwe. Ngoko ke, i-S2 yindlela ekhethiweyo yokuhamba, ilandelwa yi-S3 kunye ne-S1.

(2) Inqwelomoya yamandla ikufutshane nenqwelomoya ye-GND, umgama phakathi kweenqwelomoya mncinci kakhulu, kwaye inezona mpembelelo zibalaseleyo zokurhoxisa ukubhobhoza kunye nesiphene sendiza yamandla asezantsi.

(3) Amandla ombane aphambili kunye nelaphu elihambelana nawo libekwe kumaleko 4 no-5. I-G2-S2 kufuneka incitshiswe ngokulinganayo), ukwenzela ukunciphisa ukungxamiseka kwenqwelomoya kunye nefuthe lonikezelo lwamandla kwi-S1.

2. Xa iindleko ziphezulu, kungamkelwa iskimu 1;

Uhlalutyo:

(1) Ngenxa yokuba umaleko wesiginali ukufuphi kwisalathiso senqwelomoya kwaye i-S1 kunye ne-S2 zikufuphi nenqwelomoya yomhlaba, esi sakhiwo sinesona siphumo sokurhoxisa umbane sibalaseleyo;

(2) Ngenxa yesiphumo sokurhoxisa amandla omazibuthe omncinci kunye namandla aphezulu e-moya ukusuka kwinqwelomoya ukuya kwinqwelomoya ye-GND nge-S3 kunye ne-S2;

(3) Uluhlu olukhethiweyo lwe-wiring S1 kunye ne-S2, lulandelwa yi-S3 kunye ne-S4.

3. Kwiipleyiti ezingqimba ezintandathu, ukhetho 4

Uhlalutyo:

Isikimu 4 silunge ngakumbi kuno3butho 2 wasekhaya, inani elincinci leemfuno zomqondiso, ezinokubonelela ngocingo oluhle kakhulu SXNUMX.

4.Eyona mpembelelo imbi ye-EMC, Scheme,Uhlalutyo:

Kolu lwakhiwo, i-S1 kunye ne-S2 zikufutshane, i-S3 kunye ne-S4 zikufutshane, kwaye i-S3 kunye ne-S4 azikufuphi nenqwelomoya yomhlaba, ke isiphumo sokurhoxiswa kwemagneti asisihle.

Cukunyanzelwa

Imigaqo ethile kuyilo maleko PCB:

(1) Kukho inqwelomoya yomhlaba opheleleyo (ikhaka) ngaphantsi komphezulu wecandelo kunye nomphezulu we welding;

(2) Zama ukunqanda ngokuthe ngqo kumaleko emiqondiso emibini;

(3) Zonke izaleko zemiqondiso zikufuphi nenqwelomoya yomhlaba kangangoko kunokwenzeka;

(4) Umaleko wentambo yokuhamba rhoqo, isantya esiphezulu, iwotshi kunye neminye imiqondiso ephambili kufuneka ibenesiqwenga somhlaba esikufutshane.