Zikafika pa PCB kapangidwe, malire omwe amapangidwa ndi kuthekera kwa waya kwa PCB ndikofunikira.

Mphamvu yolumikizira waya pa PCB imatsimikizika ndi magawo monga kutalika kwa waya, makulidwe a zingwe, kutentha kwakukulu komwe kumafunikira, ngakhale kulumikizana kuli mkati kapena kunja, komanso ngati kuli ndi kukana kwa kamwazi.

Munkhaniyi tikambirana zotsatirazi:

chimodzi Kodi PCB mzere m’lifupi ndi chiyani?

Kulumikizana kwa PCB kapena woyendetsa mkuwa pa PCB, amatha kuyendetsa mbendera pamtunda wa PCB. The etching leaves a narrow section of copper foil, and the current flowing through the copper wire generates a lot of heat. Kuyika bwino ma waya a PCB ndi makulidwe ake kumathandiza kuchepetsa kutentha. Kukula kwazitali m’lifupi, kutsikira kwakanthawi, komanso kutentha pang’ono. Kukula kwa waya kwa PCB ndikulimba kwake komanso makulidwe ake ndi gawo loyimirira.

Kupanga kwa PCB kumayambira nthawi zonse ndi mzere wosasintha. Komabe, kutambasuka kwa mzerewu sikuli koyenera nthawi zonse kwa PCB yomwe mukufuna. Izi ndichifukwa choti muyenera kulingalira za kuchuluka kwa zingwe zama waya kuti mudziwe kutalika kwa zingwe.

Mukazindikira kulondola kwa mzere, lingalirani zinthu zingapo:

1. Makulidwe amkuwa – Makulidwe amkuwa ndiye makulidwe enieni a PCB. Makulidwe amkuwa osasunthika a PCBS omwe ali pakadali pano ndi 1 ounce (35 micron) mpaka 2 ounce (70 micron).

2. Magawo oyendetsa oyendetsa mbali – Kuti mukhale ndi mphamvu yayikulu ya PCB, ndikofunikira kukhala ndi gawo lalikulu la oyendetsa, olingana ndi m’lifupi mwake.

3. Malo ofufuza – pansi kapena pamwamba kapena mkati wosanjikiza.

awiri Kodi kupanga mkulu PCB panopa?

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. Muzinthu zina, monga kuyendetsa galimoto, pakufunika nthawi ya 50A, yomwe idzafuna mkuwa wambiri pa PCB ndi m’lifupi mwake waya.

Njira yopangira zofunikira pakadali pano ndikukulitsa kulumikizana kwa mkuwa ndikuwonjezera makulidwe a zingwe ku 2OZ. Izi ziziwonjezera malo pa bolodi kapena kuwonjezera kuchuluka kwa zigawo pa PCB.

3. Mkulu panopa mfundo PCB Kamangidwe:

Reduce the length of high-current cabling

Mawaya ataliatali amalimbikira kwambiri ndipo amanyamula pano kwambiri, zomwe zimapangitsa kuti magetsi azitayika kwambiri. Chifukwa mphamvu zamagetsi zimatulutsa kutentha, moyo wa board woyendetsa wafupikitsidwa.

Terengani kutalika kwa zingwezo pakakhala kutentha koyenera ndikugwa

Kutambalala kwa mzere ndi ntchito yazosintha monga kukana komanso kupyola kwapompopompo ndi kutentha kololeka. Nthawi zambiri, kutentha kwakutentha kwa 10 ℃ kumaloledwa kutentha kozungulira kupitirira 25 ℃. If the material and design of the plate allow, even a temperature rise of 20°C can be allowed.

Patulani zinthu zazing’ono kuchokera kumadera otentha kwambiri

Zida zina zamagetsi, monga ma voltage voltage, ma analog a digito osinthira ndi ma amplifiers ogwirira ntchito, amazindikira kusintha kwa kutentha. Zigawo zikatenthedwa, chizindikiro chawo chimasintha.

Mbale zamakono zamakono zimadziwika kuti zimapanga kutentha, chifukwa chake zinthuzo zimayenera kusungidwa patali ndi madera otentha. Mutha kuchita izi popanga mabowo bolodi ndikupereka kutaya kwanyengo.

Chotsani chosanjikiza cha solder

Kuti muwonjeze kutuluka kwamtundu wa waya, chotchinga chotchinga cha solder chitha kuchotsedwa ndipo mkuwa pansi pake uwonekere. Zowonjezera zowonjezera zitha kuwonjezeredwa pa waya, zomwe zimawonjezera makulidwe a waya ndikuchepetsa kukana. Izi zithandizira kuti pakadali pano pakweze waya popanda kuwonjezera kukula kwa waya kapena kuwonjezera makulidwe owonjezera amkuwa.

Mzere wamkati umagwiritsidwa ntchito pa zingwe zamakono

Ngati wosanjikiza wakunja wa PCB alibe malo okwanira a zingwe zowonjezera, zingwe zimatha kudzazidwa mkati mwa PCB. Kenako, mutha kugwiritsa ntchito kulumikizana kozungulira pazida zakunja kwambiri.

Onjezani zingwe zamkuwa zaposachedwa

Kwa magalimoto amagetsi ndi ma inverters okhala ndi mphamvu zopitilira 100A, kulumikizana ndi mkuwa sikungakhale njira yabwino yopatsira mphamvu ndi zizindikilo. Poterepa, mutha kugwiritsa ntchito mipiringidzo yamkuwa yomwe ingagulitsidwe pa pedi ya PCB. Chipilala chachitsulo chimakhala cholimba kwambiri kuposa waya ndipo chimatha kunyamula mafunde akulu momwe amafunira popanda zovuta zilizonse zotenthetsera.

Gwiritsani ntchito ma suture obowola kuti mutenge mawaya angapo pamitundu ingapo yamagetsi

Makabati sangathe kunyamula zomwe mukufunazo mosanjikiza kamodzi, kabati imatha kuyendetsedwa pamitundu ingapo ndikuchiritsidwa ndikulumikiza zigawozo pamodzi. Potengera makulidwe omwewo amitundu iwiriyi, izi ziziwonjezera mphamvu zomwe zikupezeka pano.

mapeto

Pali zinthu zambiri zovuta pozindikira mphamvu zamagetsi zomwe zilipo pano. Komabe, opanga ma PCB amatha kudalira makina owerengera makulidwe odalirika kuti athandizire kupanga matabwa awo moyenera. Mukamapanga ma PCBS odalirika komanso ogwira ntchito kwambiri, kukhazikika kolondola kwa mzere ndi zomwe zikunyamula pano zitha kupita kutali.