Uma kuziwa PCB design, umkhawulo owenziwe ngumthamo wamanje wentambo ye-PCB ubalulekile.

Umthamo wamanje wentambo ku-PCB unqunywa ngamapharamitha anjengobubanzi bezintambo, ubukhulu bensimbi, ukukhuphuka kwezinga lokushisa okudingekayo, noma ngabe intambo ingaphakathi noma ingaphandle, nokuthi imbozwe ukumelana nokucucuza.

Kulesi sihloko, sizoxoxa ngokulandelayo:

one Uyini ububanzi bomugqa we-PCB?

Izintambo ze-PCB noma umqhubi wethusi ku-PCB, angaqhuba isignali ebusweni be-PCB. The etching leaves a narrow section of copper foil, and the current flowing through the copper wire generates a lot of heat. Ukulinganiswa kahle kwe-wiring nobubanzi be-PCB kusiza ukunciphisa ukwakheka kokushisa ebhodini. Ububanzi bebubanzi bomugqa, ukwehla kokumelana nokwamanje, nokuqoqwa kokushisa okuncane. I-PCB wiring ububanzi ubukhulu obuvundlile nobukhulu ubukhulu obubheke phezulu.

Idizayini ye-PCB iqala njalo ngobubanzi bomugqa ozenzakalelayo. Kodwa-ke, lobubanzi bolayini obuzenzakalelayo abulungeli ngaso sonke isikhathi i-PCB oyifunayo. Lokhu kungenxa yokuthi udinga ukubheka umthamo wamanje wokuphatha izintambo ukunquma ububanzi bezintambo.

Lapho kunqunywa ububanzi bomugqa olungile, cabanga ngezinto eziningana:

1. Ubukhulu bethusi – Ubukhulu bethusi ubukhulu bangempela bezintambo ku-PCB. Ubukhulu bethusi obuzenzakalelayo be-PCBS ephezulu njengamanje yi-ounce elilodwa (1 micron) kuye ku-35 ounce (2 micron).

2. Indawo enqamulelayo yomqhubi – Ukuze ube namandla aphakeme we-PCB, kuyadingeka ukuthi ube nendawo enqamulelayo enqamulelayo yomqhubi, elingana nobubanzi bomqhubi.

3. Indawo yokulandelela – phansi noma phezulu noma ungqimba lwangaphakathi.

ezimbili Ungayakha kanjani i-PCB yamanje ephezulu?

Digital circuits, RF circuits and power circuits mainly process or transmit low power signals. The copper in these circuits weighs 1-2Oz and carries a current of 1A or 2A. Kwezinye izinhlelo zokusebenza, njengokulawulwa kwezimoto, kudingeka kuze kufike ku-50A, okuzodinga ithusi eliningi ku-PCB nobubanzi obuningi bocingo.

Indlela yokuklama yezidingo zamanje eziphakeme ukunweba izintambo zethusi nokwandisa ukushuba kwentambo ibe yi-2OZ. Lokhu kuzokhulisa isikhala ebhodini noma kukhulise inani lezendlalelo ku-PCB.

3. High yamanje PCB isakhiwo criteria:

Reduce the length of high-current cabling

Izintambo ezinde zinokumelana okuphezulu futhi zithwala zamanje eziphakeme, okuholela ekulahlekelweni okuphezulu kwamandla. Ngoba ukulahleka kwamandla kudala ukushisa, impilo yebhodi lesifunda ifinyeziwe.

Bala ububanzi bezintambo lapho izinga lokushisa elifanele liphakama futhi liwa

Ububanzi bolayini kungumsebenzi wokuguquguquka okufana nokumelana nesikhathi samanje esigeleza ngawo nezinga lokushisa elivumelekile. Ngokuvamile, ukukhuphuka kwezinga lokushisa elingu-10 ℃ kuvunyelwe emazingeni okushisa ambient angaphezu kwama-25 ℃. If the material and design of the plate allow, even a temperature rise of 20°C can be allowed.

Hlukanisa izinto ezizwelayo ezindaweni ezishisa kakhulu

Izakhi ezithile ze-elekthronikhi, ezinjengezikhombisi zamandla kagesi, iziguquli ze-analog-to-digital kanye nezikhulisi zokusebenza, ziyazwela ekushintsheni kwezinga lokushisa. Lapho lezi zinto zifudunyezwa, isiginali yazo iyashintsha.

Amapuleti amanje aphezulu ayaziwa ukuthi akhiqiza ukushisa, ngakho-ke izingxenye zidinga ukugcinwa kude nezindawo ezinokushisa okuphezulu. Ungakwenza lokhu ngokwenza izimbobo ebhodini nokunikeza ukushabalalisa ukushisa.

Susa isendlalelo sokumelana ne-solder

Ukukhulisa umthamo wamanje wokugeleza kocingo, ungqimba lwesivimbeli se-solder lungasuswa futhi ithusi ngaphansi lidalulwe. I-solder eyengeziwe ingangezelelwa ocingweni, oluzokhulisa ubukhulu bocingo futhi linciphise inani lokumelana. Lokhu kuzovumela ukugeleza kwamanje ngocingo ngaphandle kokukhulisa ububanzi bocingo noma ukwengeza ukujiya okwengeziwe kwethusi.

Isendlalelo sangaphakathi sisetshenziselwa i-wiring ephezulu yamanje

Uma ungqimba lwangaphandle lwe-PCB lungenaso isikhala esanele sokuxhuma izintambo, i-wiring ingagcwaliswa kusendlalelo sangaphakathi se-PCB. Okulandelayo, ungasebenzisa ukuxhumeka okuyimbobo kudivayisi yangaphandle ephezulu yamanje.

Faka imichilo yethusi yamanje ephakeme

Ezimotweni zikagesi kanye nama-inverters anamandla amakhulu ane-100A yamanje eyeqile, i-wiring yethusi kungenzeka ingabi yindlela engcono yokudlulisa amandla nezimpawu. Kulokhu, ungasebenzisa imigoqo yethusi engathengiswa nge-PCB pad. Ibha yethusi iyajiya kakhulu kunocingo futhi ingathwala imisinga emikhulu njengoba kudingeka ngaphandle kwezinkinga zokushisa.

Sebenzisa ama-suture angena emgodini ukuphatha izintambo eziningi ngaphezulu kwezendlalelo eziningi zamanje eziphezulu

Lapho ukufaka iklabishi kungakwazi ukuthwala okwamanje okufunayo ngongqimba owodwa, iklabishi ingahanjiswa ngaphezulu kwezendlalelo eziningi futhi iphathwe ngokuhlanganisa izingqimba ndawonye. Endabeni yobukhulu obufanayo bezingqimba ezimbili, lokhu kuzokhulisa umthamo ophethe njengamanje.

isiphetho

Kunezici eziningi eziyinkimbinkimbi ekunqumeni amandla wiring wamanje. Kodwa-ke, abaklami be-PCB bangathembela ekuthembekeni kwama-calculator wokujiya kolayini ukusiza ukuklama amabhodi abo kahle. Lapho kuklanywa ama-PCBS athembekile futhi asebenza kahle, ukusethwa okulungile kobubanzi bolayini namandla okuthwala amanje kungahamba ibanga elide.