Xa kuza ku PCB uyilo, umda owenziwe ngumthamo wangoku we-PCB ye-wiring ubalulekile.

Umthamo wangoku weentambo kwi-PCB umiselwe ziiparamitha ezinje ngobubanzi beentambo, ubukhulu beentambo, ukunyuka kweqondo lobushushu okufunekayo, nokuba iintambo zingaphakathi okanye ngaphandle, nokuba zigutyungelwe kukuxhathisa kokuhamba.

Kweli nqaku siza kuthetha ngoku kulandelayo:

Nye Yintoni ububanzi bomgca wePCB?

Iingcingo ze-PCB okanye umqhubi wobhedu kwi-PCB, unokuqhuba umqondiso kumgangatho we-PCB. The etching leaves a narrow section of copper foil, and the current flowing through the copper wire generates a lot of heat. Ukulinganiswa ngokuchanekileyo kwe-PCB ububanzi kunye nobukhulu bunceda ukunciphisa ubushushu ebhodini. Ububanzi bebubanzi bomgca, ukuthoba ukuxhathisa okwangoku, kunye nokufumba kobushushu obuncinci. Ububanzi bokubumba iintambo ze-PCB bubukhulu obuthe tyaba kunye nobukhulu bubume obuthe nkqo.

Uyilo lwePCB luhlala luqala ngobubanzi bomgca osisiseko. Nangona kunjalo, obu bubanzi bomgca osisiseko abuhlali kufanelekile kwi-PCB efunwayo. Kungenxa yokuba kuya kufuneka ujonge umthamo ophetheyo ngoku weengcingo ukumisela ububanzi beentambo.

Xa umisela ububanzi bomgca ochanekileyo, jonga izinto ezininzi:

1. Ubunzima beCopper-ubukhulu beCopper bobona bunzima be-wiring kwi-PCB. Ubungakanani bobhedu obungagungqiyo kwi-PCBS ephezulu ngoku yi-ounce enye (i-1 micron) ukuya kwi-35 i-ounce (i-2 micron).

2. Indawo enqamlezileyo yomqhubi wenqwelomoya- Ukuze ube namandla aphezulu e-PCB, kufuneka ubenendawo enkulu enqamlezileyo yomqhubi, elingana nobubanzi bomqhubi wayo.

3. Indawo yomkhondo – ezantsi okanye phezulu okanye ngaphakathi.

Mbini Uyila njani i-PCB ephezulu ngoku?

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 izicelo, ezinje ngolawulo lweemoto, kuya kufuneka ukuya kuthi ga kwi-50A, eya kufuna ubhedu oluninzi kwi-PCB kunye nobubanzi becingo ngakumbi.

Indlela yoyilo kwiimfuno eziphakamileyo zangoku kukwandisa ii-wiring zethusi kunye nokunyusa ubukhulu be-wiring ukuya kwi-2OZ. Oku kuyonyusa indawo ebhodini okanye kwandise inani leendlela kwiPCB.

3. Iikhrayitheriya zangoku zokuyilwa kwePCB:

Reduce the length of high-current cabling

Iingcingo ezinde zinokuxhathisa okuphezulu kwaye zithwala ngaphezulu ngoku, okukhokelela kwilahleko ephezulu yamandla. Kuba ilahleko yamandla ivelisa ubushushu, ubomi bebhodi yesekethe bufutshane.

Bala ububanzi beengcingo xa kuphuma ubushushu obufanelekileyo kunye nokuwa kwenziwa

Ububanzi bomgca ngumsebenzi wezinto eziguquguqukayo ezinjengokuxhathisa kunye nokuhamba ngoku kuyo kunye nobushushu obuvumelekileyo. Ngokubanzi, ukunyuka kweqondo lobushushu elingu-10 ℃ kuvunyelwe kumaqondo obushushu ambient ngaphezulu kwe-25 ℃. If the material and design of the plate allow, even a temperature rise of 20°C can be allowed.

Khetha izinto ezinobuthathaka kwiindawo ezinobushushu obuphezulu

Izinto ezithile ze-elektroniki, ezinje ngeereferensi zombane, isiguquli se-analog-ukuya-kwidijithali kunye nezikhulisi zokusebenza, zinolwazelelelo kutshintsho lobushushu. Xa la macandelo efudunyezwa, utshintsho lweempawu zawo.

Amacwecwe aphakamileyo aphezulu ayaziwa ngokuvelisa ubushushu, ke ezo zinto kufuneka zigcinwe kude ukusuka kwindawo ezinobushushu obuphezulu. Unokwenza oku ngokwenza imingxunya ebhodini kunye nokubonelela ngokusasaza ubushushu.

Susa umaleko wokumelana ne-solder

Ukunyusa amandla okuhamba okukhoyo ocingo, umaleko wesithintelo se-solder ungasuswa kwaye ubhedu ngaphantsi luvezwe. I-solder eyongezelelweyo inokongezwa kwintambo, eya kuthi inyuse ubukhulu bocingo kunye nokunciphisa ixabiso lokunganyangeki. Oku kuyakuvumela ngakumbi ukuba kungoku kuhamba ngocingo ngaphandle kokonyusa ububanzi bocingo okanye ukongeza ubukhulu bobhedu.

Uluhlu lwangaphakathi lusetyenziselwa i-wiring ephezulu

Ukuba umaleko engaphandle PCB akanayo indawo eyaneleyo kweentambo ziyatyeba, iingcingo zingagcwaliswa umaleko engaphakathi PCB. Emva koko, unokusebenzisa uqhagamshelo lomngxunya kwizixhobo zangaphandle eziphezulu.

Yongeza imitya yobhedu yangoku ephezulu

Kwizithuthi zombane kunye neziguquli ezinamandla amakhulu ezigqitha i-100A yangoku, ii-wiring zethusi zisenokungabi yeyona ndlela ilungileyo yokuhambisa amandla kunye neempawu. Kule meko, ungasebenzisa imivalo yobhedu enokuthengiswa kwi-PCB pad. Ibha yobhedu iyatyeba ngakumbi kunocingo kwaye inokuhambisa imisinga emikhulu njengoko kufuneka ngaphandle kwengxaki zokufudumeza.

Sebenzisa ii-suture zemingxunya ukuhambisa iingcingo ezininzi ngaphezulu kweendlela ezininzi zangoku

Xa i-cabling ingakwazi ukuthwala i-current yangoku kwi-single single, i-cabling ingahanjiswa ngaphezulu kweendlela ezininzi kwaye inyangwe ngokudibanisa umaleko kunye. Kwimeko yobukhulu obufanayo bezingqimba ezimbini, oku kuyakwandisa amandla okuphatha ngoku.

siphelo

Zininzi izinto ezintsonkothileyo ekumiseleni umthamo weentambo ezikhoyo ngoku. Nangona kunjalo, abaqulunqi bePCB banokuxhomekeka ekuthembekeni kwezibalo zokubala zomgca ukunceda ukuyila iibhodi zazo ngokufanelekileyo. Xa uyila ii-PCBS ezinokuthenjwa kunye nokusebenza okuphezulu, useto oluchanekileyo lobubanzi bomgca kunye nomthamo ophetheyo ngoku unokuhamba indlela ende.