Qhov ncaj qha ua rau PCB kub nce yog vim muaj cov khoom siv hluav taws xob hauv hluav taws xob dissipation, cov khoom siv hluav taws xob muaj qhov sib txawv ntawm cov hluav taws xob dissipation, thiab cov cua kub sib txawv nrog lub zog dissipation.

2 phenomena ntawm kub nce hauv PCB:

(1) qhov kub thiab txias hauv cheeb tsam nce los yog loj cheeb tsam kub nce;

(2) Lub sijhawm luv luv lossis lub sijhawm ntev kub nce.

Hauv kev tsom xam ntawm PCB thermal zog, cov nram qab no feem ntau txheeb xyuas:

1. Kev siv hluav taws xob

(1) txheeb xyuas qhov siv hluav taws xob hauv ib cheeb tsam;

(2) txheeb xyuas qhov kev faib hluav taws xob ntawm PCB.

2. Cov qauv ntawm PCB

(1) qhov loj ntawm PCB;

(2) cov ntaub ntawv.

3. Kev teeb tsa ntawm PCB

(1) txoj kev teeb tsa (xws li kev teeb tsa ntsug thiab kab rov tav installation);

(2) sealing mob thiab nyob deb ntawm lub tsev.

4. Cov hluav taws xob cua sov

(1) hluav taws xob coefficient ntawm PCB nto;

(2) qhov kub sib txawv ntawm PCB thiab qhov chaw nyob ib sab thiab lawv qhov kub thiab txias;

5. Thaum tshav kub kub conduction

(1) nruab radiator;

(2) kev ua haujlwm ntawm lwm yam kev teeb tsa.

6. Thermal convection

(1) natural convection;

(2) yuam kom txias convection.

Kev txheeb xyuas PCB ntawm cov xwm txheej saum toj no yog ib txoj hauv kev zoo los daws cov PCB qhov kub thiab txias, feem ntau hauv cov khoom lag luam thiab cov txheej txheem no muaj kev cuam tshuam thiab nyob ntawm, feem ntau yuav tsum tau txheeb xyuas raws li qhov xwm txheej tiag tiag, tsuas yog rau qhov xwm txheej tshwj xeeb tuaj yeem ua tau ntau dua. raug xam los yog kwv yees qhov kub thiab txias tsis muaj zog.