Iyo inokwira gomba mukati PCB is an important element in electronic design. Ose pcb dhizaini achanzwisisa chinangwa chePBB yekumhanyisa maburi uye yakakosha dhizaini. Zvakare, kana gomba rinokwira rakabatanidzwa pasi, mamwe matambudziko asina basa anogona kuponeswa mushure mekumisikidzwa.

How kushandisa pcb makomba kuderedza EMI?

Seizvo zita rinoratidzira, pcb kumisikidza maburi kunobatsira kuchengetedza iyo PCB kune iyo dzimba. Nekudaro, uku ndiko kushandiswa kwemuchina, kuwedzera kune iro remagetsi rinoshanda, pombi dzePBB dzinokwidziridzwa dzinogona zvakare kushandiswa kudzikisira kupesana kwemagetsi (EMI). Emi-inonzwisisika PCBS inowanzo chengetwa muzvivharo zvesimbi. Kuti unyatsogadzirisa EMI, yakavezwa pcb inokwidza maburi inoda kuve yakabatana pasi. Mushure meiyi nhoo yekumisikidza, chero kukanganiswa kwemagetsi kunobva kwaendeswa kunobva pasimbi yakavharirwa pasi.

How kushandisa pcb makomba kuderedza EMI? Sei kubatana kwepasi kuchikosha?

Mubvunzo wakajairika wakabvunzwa neavhareji nyowani nyowani ndeyekuti ndeipi pasi yaunobatanidza iyo? Mune zvakajairika zvemagetsi zvigadzirwa, pane zviratidzo, dzimba dzimba uye pasi. Semutemo wechigumwe, usabatanidze maburi anokwidza kuratidza pasi. Signal ivhu ndiyo inongedzera pasi yezvinhu zvemagetsi mune yako wedunhu dhizaini, uye kuunza magetsi emagetsi kupindira mukati maro haisi zano rakanaka.

Izvo iwe zvaunoda kubatanidza ndeye kesi grounding. Apa ndipo panosangana kubatana kwepasi kwekabineti. Chassis yekumisikidza inofanirwa kuve yakabatana panguva imwechete, kunyanya kuburikidza neyekubatanidza nyeredzi. Izvi zvinodzivirira kukonzeresa zvishwe zvevhu uye kubatana kwakawanda. Multiple grounding connections can cause a slight voltage difference and cause current to flow between chassis grounding. Chassis inozoiswa pasi kuitira matanho ekuchengetedza.

Sei zvichikosha kuve nemabatirwo akakodzera epasi?

Kana hwaro hwehombodo pabhodhi rePCB iri deko resimbi, saka goko rese resimbi ipasi. Tambo yepasi ye220V magetsi emagetsi yakabatana nepasi. Yese mafafitera anodikanwa kuti abatanidzwe nepasi, uye masikuru anofanirawo kusunganidzwa nepasi. In this way, incoming interference in EMC testing is discharged directly from the ground to the ground without interfering with the internal system. Uye zvakare, zvishandiso zvekuchengetedza EMC zvinofanirwa kuve nechero interface, uye zvinofanirwa kunge zviri padyo neiyo interface.

If it’s a plastic case, it’s best to have a metal plate embedded in it. Kana pasina nzira yekuzadzikisa, saka zvakafanira kuti ufunge zvakanyanya mugadziriro yewiring, chiratidzo chinononoka (wachi, reset, kristaro oscillator, nezvimwewo) mutsetse unoda kuchengetedza kugadzirwa kwepasi, kuwedzera firita network (chip, kristaro oscillator , magetsi).

Kubatanidza maburi anokwira kumusoro kune chassis pasi ndiyo tsika yakanyanya kunaka, asi kwete yega tsika yakanakisa yekutevera. Kuti uve nechokwadi chekuti mudziyo wako wakachengetedzwa, yako chassis grounding inofanira kunge yakabatana kune yakakodzera grounding terminal. Semuenzaniso, kana iwe ukavaka otomatiki yekupaka muripo muchina uyo usina kunyatso kuvakwa, unogona kunge uine vatengi vachinyunyuta nezve “magetsi kuvhunduka” ivo vachibhadhara. Izvi zvinogona kuitika kana mutengi achibata iyo isiri-insulating simbi chikamu cheyakavharirwa.

Kuvhunduka nyoro kwemagetsi kunogona zvakare kuitika kana komputa yemagetsi chassis isina kunyatso kuvakwa. This can also happen when ground cables connecting power outlets to the floor of a building are disconnected. Izvi zvinogona kukonzera kuyangarara pasi pane inoenderana muchina.

The principle of EMI shielding depends on proper grounding connections. Kuva nehukama hwepasi pano husingangoratidzire mutengi wako kushamisika kwemagetsi, asi kunogona kukanganisa kuchengetedzeka kwevatengi vako kana mudziyo wako uripfupi. Sezvinoratidzwa mumufananidzo pazasi, kukodzera kwakakodzera kwakakosha kuchengetedzeka uye EMI kudzivirirwa.

Basic magadzirirwo pamasikiro pcb vanomhanyisa maburi

Pcb hunowedzera maburi anowanzo shandiswa mukugadzira. Pane mashoma mashoma akareruka mitemo kana zvasvika pakusimudza maburi. Chokutanga, teerera kuhutano hwemakomba anokwira. Iko kukanganisa pano kunoguma kunanga kuti yako PCB isingaiswe nenzira kwayo mudzimba dzayo. Uyezve ita chokwadi chekuti gomba rinokwira ndiro saizi chaiyo yesikuru yaunosarudza.

Yakakura redunhu dhizaini software, senge Altium Dhizaini yekuteedzana software, inogona kunyatsoisa maburi anokwira uye kutsanangura mitemo inosangana nenzvimbo dzakachengeteka. Usaise makomba ekumisikidza zvakanyanya kumucheto kwePCB. Zvishoma zvidhizizi zvemagetsi kumicheto zvinogona kukonzera kutsemuka muPCB panguva yekumisikidza kana kukatanura. Iwe unofanirwa zvakare kusiya nzvimbo yakakwana pakati pemakomba anokwira uye zvimwe zvikamu.