Abin da ake kira murfin jan ƙarfe shine ɗaukar sarari mara aiki akan PCB a matsayin matakin tunani, sannan ku cika da jan ƙarfe mai ƙarfi, waɗannan wuraren jan ƙarfe kuma ana kiransu ciko na jan ƙarfe. Mahimmancin murfin jan ƙarfe shine don rage ƙarancin waya ta ƙasa da haɓaka ikon hana tsangwama. Rage raguwar ƙarfin lantarki, inganta ƙarfin wutar lantarki; Haɗawa zuwa ƙasa kuma yana rage yankin madauki.

Menene fa’idodi da rashin amfani yayin rufe PCB jan ƙarfe

Rufin tagulla wani muhimmin sashi ne na ƙirar PCB. Dukansu software na ƙirar ƙirar PCB na Qingyuefeng da wasu Protel na waje da PowerPCB suna ba da aikin rufe murfin jan ƙarfe. Don haka yadda ake amfani da jan ƙarfe da kyau, zan raba muku wasu ra’ayoyi na, da fatan kawo fa’ida ga takwarorina.

Abin da ake kira murfin jan ƙarfe shine ɗaukar sarari mara aiki akan PCB azaman matakin tunani, sannan a cika da jan ƙarfe mai ƙarfi, waɗannan wuraren jan ƙarfe kuma ana kiransu ciko na jan ƙarfe. Mahimmancin murfin jan ƙarfe shine don rage ƙarancin waya ta ƙasa da haɓaka ikon hana tsangwama. Rage raguwar ƙarfin lantarki, inganta ƙarfin wutar lantarki; Haɗawa zuwa ƙasa kuma yana rage yankin madauki. Don rage nakasa na waldi na PCB, yawancin masana’antun PCB suma suna buƙatar masu zanen PCB su cika fata na jan ƙarfe ko waya mai kama da grid a cikin sararin PCB. Idan ba a kula da suturar jan ƙarfe yadda ya kamata, ba za a ba shi lada kuma a rasa ba. Shin rufe murfin tagulla “ya fi kyau fiye da cutarwa” ko “mafi cutarwa fiye da nagarta”?

A ƙarƙashin yanayin babban mitar sananne ne ga kowa, a kan faifan da’irar da aka buga za ta yi aiki, lokacin da tsawon ya fi 1/20 na mitar amo daidai da raƙuman ruwa, na iya haifar da tasirin eriya, amo zai fara fitowa ta hanyar wayoyi , idan akwai mummunan ƙirar jan ƙarfe a cikin PCB, mayafin jan ƙarfe ya zama kayan aikin hayaniyar watsawa, saboda haka, a cikin madaidaicin mitar, Kada kuyi tunanin cewa ƙasa a wani wuri da aka haɗa da ƙasa, wannan shine “ƙasa”, dole ne ya zama ƙasa da λ/20 na tazara, a cikin ramin wayoyi, da kuma bene na allon multilayer “kyakkyawan tushe”. Idan an kula da murfin tagulla yadda yakamata, murfin jan ƙarfe ba kawai yana ƙaruwa a halin yanzu ba, har ma yana taka rawa biyu wajen katsalandan na kariya.

Rufin jan ƙarfe gabaɗaya yana da hanyoyi guda biyu na asali, babban yanki ne na murfin jan ƙarfe da jan ƙarfe, sau da yawa wani ya tambaya, babban yanki na murfin jan ƙarfe ko rufe murfin jan ƙarfe yana da kyau, mara kyau. Me ne wancan? Babban rufi na jan ƙarfe, tare da ƙara ƙarfin halin yanzu da garkuwa da rawar biyu, amma babban murfin jan ƙarfe, idan ƙarar igiyar ruwa, jirgi na iya zama karkatattu, ko ma kumfa. Sabili da haka, babban yanki na murfin jan ƙarfe, gabaɗaya kuma yana buɗe wasu ‘yan ramuka, yana sauƙaƙa kumfa kumfa, madaidaicin murfin jan ƙarfe galibi yana karewa, yana ƙaruwa rawar da ake samu yanzu, daga yanayin watsawar zafi, grid yana da fa’ida ( yana rage saman dumama na jan ƙarfe) kuma yana da taka rawa a garkuwar electromagnetic. Amma yakamata a nuna cewa, ana yin grid ɗin ta madaidaicin shugabanci na gudana, mun sani don faɗin layin da’irar don mitar aikin hukumar da’irar yana da madaidaicin “wutar lantarki” na (ainihin girman da aka raba ta mitar aiki na madaidaicin mitar dijital, litattafan kankare), lokacin da mitar aiki ba ta da girma sosai, Wataƙila layukan grid ba sa aiki sosai, amma da zarar tsawon ƙarfin ya yi daidai da mitar aiki, yana da kyau sosai, kuma kun ga cewa kewaye ba ya aiki kwata -kwata, kuma akwai siginar da ke kashe ko’ina. wanda ke kawo cikas ga yadda tsarin ke aiki. Don haka ga waɗanda ke amfani da grid, shawarata ita ce su zaɓi gwargwadon ƙirar hukumar da’irar, kada ku manne da abu ɗaya. Don haka madaidaicin madaidaiciya akan buƙatun tsangwama na babban maƙasudi mai yawa, madaidaicin mitar yana da babban da’irar yanzu da sauran galibi ana amfani da cikakken kwanciya.

Bayan mun faɗi abubuwa da yawa, muna buƙatar kula da waɗancan matsalolin a cikin murfin jan ƙarfe don cimma nasarar abin da ake so na jan ƙarfe:

1. Idan akwai ƙasa mai yawa na PCB, SGND, AGND, GND, da dai sauransu, ya zama dole a yi amfani da mafi mahimmancin “ƙasa” a matsayin abin da ake nufi da jan gashin kansa da kansa gwargwadon matsayin farfajiyar PCB daban -daban. Ba a ambaci cewa ƙasa ta dijital da ƙasa analog an haɗa su da jan ƙarfe daban, a lokaci guda, kafin rufe jan ƙarfe, yakamata a yi kaurin kebul ɗin wutar: 5.0V, 3.3V, da dai sauransu Ta wannan hanyar, an samar da juzu’in sifofi masu siffa daban -daban.

2. Don haɗin maɗaukaki ɗaya na ƙasa daban -daban, hanyar ita ce haɗawa ta hanyar juriya 0 ohms ko beads magnetic ko inductance;

3. Rufe Copper kusa da oscillator crystal, crystal oscillator a cikin da’irar shine babban mitar fitarwa, wanda shine murfin jan ƙarfe a kusa da oscillator na crystal, sannan kuma harsashi na oscillator na crystal an keɓe shi daban.

4. Matsalar tsibiri (matattarar yankin), idan kuna tunanin ta yi girma sosai, to ba matsala ba ce a ayyana rami kuma a ƙara.

5. A farkon wiring, yakamata a kula da ƙasa daidai. Lokacin da aka aza waya, ƙasa ya kamata ta yi kyau.

6. Yana da kyau kada a sami kusurwoyi masu kaifi a kan allo (”= digiri 180”), saboda daga mahangar electromagnetism, wannan ya zama eriya mai watsawa!

7. Kada ku rufe jan ƙarfe a cikin buɗaɗɗen wuri na wayoyin tsakiyar Layer na multilayer. Domin yana da wuya a sa murfin tagulla ya zama “mai kyau”.

8. Tabbatar cewa ƙarfe da ke cikin na’urar, kamar bututun ƙarfe na ƙarfe da tsinken ƙarfafawa, sun yi ƙasa sosai.

9. Toshewar ƙarfe mai zafi na mai sarrafa tashoshi uku dole ya kasance yana da tushe. Bel ɗin keɓewa na ƙasa kusa da oscillator crystal dole ne ya kasance yana da tushe. A takaice: murfin jan ƙarfe akan PCB, idan an magance matsalar ƙasa sosai, tabbas “mafi kyau fiye da mara kyau”, zai iya rage yankin komawar layin siginar, rage tsangwama na lantarki na waje.