Iyo EMC dhizaini mune Pcb bhodhi inofanira kunge iri chikamu chedhizaini yakazara yechero mudziyo wemagetsi uye system, uye inodhura zvakanyanya kupfuura dzimwe nzira dzinoedza kuita kuti chigadzirwa chisvike EMC. Iyo yakakosha tekinoroji ye electromagnetic kuenderana dhizaini ndiko kudzidza kwe electromagnetic kupindira masosi. Kudzora iyo electromagnetic emission kubva kune electromagnetic kupindira masosi mhinduro isingaperi. Kudzora kuburitswa kwezvinovhiringidza masosi, mukuwedzera kudzikisa mwero wemagetsi eruzha rinogadzirwa nemagetsi emagetsi kupindira masosi, kudzivirira (kusanganisira kuzviparadzanisa nevamwe), kusefa, uye matekinoroji ekudzika anofanira kushandiswa zvakanyanya.

Iwo makuru EMC dhizaini maitiro anosanganisira emagetsi ekudzivirira nzira, edunhu kusefa matekiniki, uye kutarisisa kwakakosha kunofanirwa kubhadharwa kune dhizaini yepasi pechinhu chepasi chinopindirana.

Imwe, iyo EMC dhizaini piramidhi muPCB board
Mufananidzo 9-4 inoratidza nzira yakakurudzirwa yeakanakisa EMC dhizaini yemidziyo uye masisitimu. Iyi girafu yepiramidi.

Chekutanga pane zvese, hwaro hweyakanaka EMC dhizaini iko kushandiswa kweakanaka magetsi uye magadzirirwo emisimboti. Izvi zvinosanganisira kufunga kwekuvimbika, senge dhizaini yemusangano mukati mekushivirira kunogamuchirwa, nzira dzakanaka dzegungano, uye nzira dzakasiyana dzekuyedza dziri kuvandudzwa.

Kazhinji kutaura, zvishandiso zvinotyaira zvemazuva ano zvemagetsi zvinofanirwa kuiswa paPCB. Midziyo iyi inoumbwa nezvikamu uye maseketi ane zvingango konzeresa kuvhiringa uye anonzwira kusimba remagetsi. Naizvozvo, iyo EMC dhizaini yePCB ndiyo inotevera yakakosha nyaya mukugadzira EMC. Nzvimbo yezvikamu zvinoshanda, kufambiswa kwemitsara yakadhindwa, kuenzanisa kweiyo impedance, dhizaini yekugadzika, uye kusefa kwedunhu zvese zvinofanirwa kutariswa panguva yekugadzira EMC. Zvimwe zvikamu zvePCB zvinodawo kuchengetedzwa.

Chechitatu, tambo dzemukati dzinowanzo shandiswa kubatanidza maPCB kana zvimwe zvemukati madiki-zvikamu. Naizvozvo, iyo EMC dhizaini yetambo yemukati inosanganisira nzira yekufambisa uye kudzivirira yakakosha kune iyo EMC yese yechero mudziyo wakapihwa.

Maitiro ekuita EMC dhizaini muPCB board?

Mushure meiyo EMC dhizaini yePCB uye yemukati tambo dhizaini yapedzwa, kutarisisa kwakanyanya kunofanirwa kubhadharwa kune yekudzivirira dhizaini yechasi uye nzira dzekugadzirisa dzemapupu ese, perforations uye tambo kuburikidza nemakomba.

Chekupedzisira, inofanirawo kutarisa pane yekupinza uye kubuda kwemagetsi magetsi uye dzimwe nyaya dzekusefa tambo.

2. Electromagnetic shielding
Kudzivirira kunonyanya kushandisa zvinhu zvakasiyana-siyana zvinoitisa, zvinogadzirwa kuita mabhomba akasiyana uye akabatana nepasi kuti adimbure nzira yemagetsi eruzha rwekuparadzira inogadzirwa nemagetsi ekubatanidza, inductive coupling kana kuchinjisa magetsi emagetsi kubatanidza munzvimbo. Iyo yekuzviparadzanisa inonyanya kushandisa relays, yekuzviparadzanisa transformers kana photoelectric Isolators uye zvimwe zvishandiso kugura nzira yekuparadzira yemagetsi ruzha muchimiro chekufambisa inoratidzirwa nekuparadzanisa pasi system yezvikamu zviviri zvedunhu uye nekucheka mukana wekubatanidza kuburikidza. impedance.

Kubudirira kwemuviri wekudzivirira kunomiririrwa nekudzivirira kushanda (SE) (sezvinoratidzwa mumufananidzo 9-5). Kubudirira kwekudzivirira kunotsanangurwa se:

Maitiro ekuita EMC dhizaini muPCB board?

Hukama huri pakati pemagetsi ekudzivirira ekudzivirira uye simba remumunda attenuation hwakanyorwa muTebhu 9-1.

Maitiro ekuita EMC dhizaini muPCB board?

Iyo yakakwirira yekudzivirira kushanda, iyo inonyanya kuoma kune yega yega 20dB kuwedzera. Nyaya yemidziyo yehurumende kazhinji inongoda kushanda kwekudzivirira kwe40dB, ukuwo nyaya yemidziyo yemauto ichiwanzoda kushanda kwekudzivirira kunodarika 60dB.

Zvishandiso zvine high magetsi conductivity uye magineti permeability zvinogona kushandiswa sekudzivirira zvinhu. Zvishandiso zvekudzivirira zvinowanzoshandiswa simbi ndiro, aluminium ndiro, aluminium foil, ndiro yemhangura, foil yemhangura uye zvichingodaro. Nekuomarara kwemagetsi kuenderana zvinodiwa kune zvigadzirwa zvevanhu, vagadziri vanowedzera vatora nzira yekuisa nickel kana mhangura pane yepurasitiki kesi kuti vakwanise kudzivirira.

PCB dhizaini, ndapota bata 020-89811835

Chetatu, kusefa
Kusefa inzira yekugadzirisa ruzha rwemagetsi mune frequency domain, ichipa yakaderera impedance nzira yemagetsi ruzha kuzadzisa chinangwa chekudzvanyirira kukanganiswa kwemagetsi. Cheka nzira iyo kukanganisa kunopararira pamwe nemutsara wechiratidzo kana tambo yemagetsi, uye kudzivirira pamwe chete kunoumba kuchengetedzwa kwakakwana kwekukanganisa. Semuenzaniso, iyo magetsi ekupa sefa inopa yakakwira impedance kune frequency yesimba re50 Hz, asi inopa yakaderera impedance kune electromagnetic ruzha spectrum.

Zvinoenderana nezvakasiyana zvekusefa zvinhu, iyo sefa yakakamurwa kuita AC simba sefa, chiratidzo chekufambisa mutsara sefa uye decoupling sefa. Zvinoenderana neiyo frequency bhendi yesefa, iyo sefa inogona kukamurwa kuita mana marudzi emafirita: yakaderera-pasi, yakakwira-pasi, bhendi-pasi, uye bhendi-stop.

Maitiro ekuita EMC dhizaini muPCB board?

Chechina, magetsi, kugadzira tekinoroji
Ingave midziyo yeruzivo rwemichina, zvemagetsi zveredhiyo, uye zvigadzirwa zvemagetsi, inofanirwa kufambiswa nemagetsi. Simba remagetsi rakakamurwa kuva kunze kwemagetsi uye mukati memagetsi. Iyo magetsi ndeye yakajairwa uye yakakomba sosi yekukanganiswa kwe electromagnetic. Zvakadai sekukanganisa kwegidhi remagetsi, iyo peak voltage inogona kunge yakakwira sema kilovolts kana kupfuura, izvo zvinokonzeresa kukuvadzwa kwemidziyo kana system. Uye zvakare, iyo mains simba tambo inzira yekusiyana kwezviratidzo zvekupindira kupinda mumidziyo. Naizvozvo, iyo magetsi emagetsi sisitimu, kunyanya iyo EMC dhizaini yekuchinja kwemagetsi, chikamu chakakosha chechikamu-chikamu dhizaini. Matanho acho akasiyana, senge tambo yemagetsi inodhonzwa zvakananga kubva kugedhi guru regedhi remagetsi, iyo AC inotorwa kubva kune yemagetsi grid inodzikamiswa, yakaderera-pass kusefa, kuparadzaniswa pakati pemagetsi ekushandura mhepo, kudzivirira, kudzvinyirira kwekuwedzera, uye overvoltage uye overcurrent kudzivirira.

Kuisa pasi kunosanganisira kuisa pasi, chiratidzo chepasi, zvichingodaro. Dhizaini yemuviri wepasi, kurongeka kwewaya yepasi, uye kuvharika kwewaya yekumisa pamhepo dzakasiyana-siyana hazvina hukama chete nekuchengetedzwa kwemagetsi kwechigadzirwa kana system, asi zvakare zvine chekuita nemagetsi kuenderana uye kuyerwa kwayo tekinoroji.

Kugadzika kwakanaka kunogona kuchengetedza kushanda kwakajairwa kwemidziyo kana sisitimu uye kuchengetedzeka kwemunhu, uye kunogona kubvisa kwakasiyana kukanganiswa kwemagetsi uye kurova kwemheni. Nokudaro, kugadzirwa kwepasi kwakakosha zvikuru, asiwo inyaya yakaoma. Kune mhando dzakawanda dzewaya dzepasi, dzinosanganisira logic ground, chiratidzo chepasi, nhovo, uye nzvimbo yekudzivirira. Nzira dzekugadzika dzinogonawo kukamurwa kuita imwe-point grounding, multi-point grounding, yakasanganiswa ivhu uye inoyangarara pasi. Iyo yakanaka yekugadzika nzvimbo inofanirwa kunge iri zero, uye hapana mutsauko ungangoita pakati penzvimbo dzekugadzika. Asi chaizvoizvo, chero “pasi” kana tambo yepasi ine kushorwa. Kana ikozvino inoyerera, kudonha kwemagetsi kuchaitika, kuitira kuti zvingave pawaya yepasi hazvisi zero, uye pachava nemhepo yevhu pakati pezviviri zvekugadzika. Kana iyo dunhu yakadzikwa pamapoinzi akawanda uye paine masaini ekubatanidza, inoumba yepasi loop yekukanganisa voltage. Naizvozvo, tekinoroji yekugadzika yakanyatso kurongeka, senge chiratidzo chekuisa pasi uye kugadzika kwesimba kunofanirwa kupatsanurwa, masekete akaomarara anoshandisa ma-multi-point grounding uye common grounding.