Resistance hlau yog ib hom kev tiv thaiv tiv thaiv, thiab nws cov khoom nto yog hais txog qhov ntom ntom tam sim no nyob rau hauv ib cheeb tsam. Kev suav kom raug ntawm qhov chaw thauj khoom ntawm cov hlau tsis muaj zog yog qhov tseem ceeb rau kev ua haujlwm zoo thiab kev pabcuam lub neej. Tsab ntawv xov xwm no yuav qhia txog yuav ua li cas los laij cov kev thauj khoom nto ntawm cov xaim hluav taws xob thiab cov lus ceeb toom ntsig txog.

Ua ntej, peb yuav tsum nkag siab lub ntsiab lus ntawm qhov chaw thauj khoom. Surface load hais txog qhov ceev tam sim no (A / cm ^ 2) yug hauv ib cheeb tsam. Sawv cev los ntawm cov mis:

Nto load = tam sim no ceev / deg cheeb tsam

Txhawm rau xam qhov chaw thauj khoom ntawm cov hlau tsis muaj zog, peb thawj zaug yuav tsum tau txiav txim siab qhov ceev tam sim no. Tam sim no qhov ntom ntom yog hais txog tus nqi tam sim no dhau los ntawm chav tsev hla ntu ntu. Nws tuaj yeem suav tau raws li tus nqi tsis kam ntawm cov khoom siv hlau tsis kam, lub zog hluav taws xob, thiab qhov hluav taws xob tiv thaiv ntev, siv cov qauv hauv qab no:

Tam sim no ceev = voltage / (kuj tus nqi x ntev)

Thaum xam qhov ceev tam sim no, cov ntsiab lus hauv qab no yuav tsum raug sau tseg:

1. Xaiv qhov tsim nyog tus nqi tiv thaiv: Tus nqi tiv thaiv ntawm cov hlau tsis muaj zog yuav tsum phim qhov ceev tam sim no. Yog tias tus nqi tiv thaiv tsawg dhau, qhov ceev tam sim no yuav siab dhau, ua rau cov hlau tsis kam tiv taus los yog kub hnyiab. Ntawm qhov tsis sib xws, tus nqi siab tiv thaiv yuav ua rau muaj qhov tsis tshua muaj tam sim no thiab tsis muaj zog txaus. Yog li ntawd, nws yog ib qho tsim nyog yuav tau xaiv cov nqi tiv thaiv tsim nyog raws li kev thov tshwj xeeb.

2. Xav txog kev nyab xeeb: txhawm rau ua kom muaj kev nyab xeeb ntawm kev ua haujlwm ntawm cov hlau tsis muaj zog, feem ntau yog qhia txog kev nyab xeeb thaum xam qhov chaw thauj khoom. Qhov loj ntawm qhov kev nyab xeeb yog nyob ntawm qhov chaw siv tiag tiag, thiab nws feem ntau pom zoo kom nyob nruab nrab ntawm 1.5 thiab 2. Qhov kawg ntawm qhov chaw thauj khoom tuaj yeem tau txais los ntawm kev sib npaug ntawm qhov kev nyab xeeb los ntawm kev ntsuas tam sim no.

3. Ua tib zoo saib xyuas qhov cuam tshuam ntawm qhov kub thiab txias ntawm cov nqi tiv thaiv: Cov hlau tsis kam yuav ua kom sov thaum lub sijhawm ua haujlwm, ua rau qhov kub thiab txias. Qhov no yuav ua rau muaj kev hloov pauv ntawm tus nqi tsis kam ntawm cov hlau tsis kam. Yog li ntawd, thaum xam qhov chaw load, nws tseem yuav tsum tau xav txog qhov variation ntawm kuj nqi nrog kub. Feem ntau, qhov kub coefficient ntawm cov ntaub ntawv resistive tuaj yeem siv rau kev kho cov lus suav.

Nyob rau hauv cov ntsiab lus, xam qhov chaw load ntawm ib tug tiv thaiv hlau yuav tsum xub txiav txim siab tam sim no ceev, thiab ces txiav txim siab qhov kawg nto load raws li tej yam xws li kev ruaj ntseg yam thiab kub kho. Kev xam tsim nyog ntawm qhov chaw thauj khoom tuaj yeem ua kom lub cev ua haujlwm ntawm cov xov hlau tsis zoo thiab txhim kho lawv lub neej kev pab.

Nws yog ib qho tsim nyog sau cia tias cov saum toj no tsuas yog ib txoj hauv kev los suav cov loads saum npoo thiab tsis siv rau txhua qhov xwm txheej. Rau cov kab hluav taws xob tiv thaiv nrog cov kev cai tshwj xeeb, xws li cov siv nyob rau hauv qee qhov chaw kub kub, cov txheej txheem kev suav tshwj xeeb yuav tsum tau siv raws li qhov xwm txheej tshwj xeeb. Hauv kev siv cov tswv yim, nws raug nquahu kom sab laj cov kws tshaj lij lossis xa mus rau cov qauv tsim nyog rau kev suav thiab xaiv.

Thaum siv cov xaim hluav taws xob tiv thaiv, ntxiv rau kev suav kom raug ntawm qhov chaw thauj khoom, cov ntsiab lus hauv qab no yuav tsum tau sau tseg:

1. Cov cua kub zoo dissipation tej yam kev mob: Resistance xov hlau ua kom sov thaum lub sij hawm ua hauj lwm, yog li nws yog tsim nyog los xyuas kom meej zoo tshav kub dissipation tej yam kev mob kom tsis txhob muaj faults los yog puas los ntawm kub kub.

2. Tiv thaiv kom tsis txhob overload: Cov hlau tsis muaj zog yuav tsum tau siv nyob rau hauv nws cov rated load ntau yam kom tsis txhob dhau tam sim no, txhawm rau tiv thaiv overload los ntawm kev ua rau muaj teeb meem xws li overheating thiab burnout.

3. Kev tshuaj xyuas tsis tu ncua: tsis tu ncua xyuas cov xwm txheej ua haujlwm thiab kev sib txuas ntawm cov hlau tiv thaiv kom ntseeg tau tias nws ua haujlwm zoo, thiab kho tam sim lossis hloov cov teeb meem pom.

4. Kev tiv thaiv ib puag ncig: Cov kab hluav taws xob tiv thaiv feem ntau yuav tsum tau ua haujlwm hauv qhov chaw qhuav, tsis muaj roj corrosive kom tsis txhob muaj kev puas tsuaj rau cov khoom siv hlau.

Nyob rau hauv cov ntsiab lus, kom raug xam qhov chaw load ntawm ib tug tiv thaiv hlau yog ib qho tseem ceeb nyob rau hauv kom ntseeg tau nws ib txwm ua hauj lwm thiab kev pab cuam lub neej. Hauv kev siv tswv yim, nws yog ib qho tsim nyog los xaiv qhov tsim nyog qhov tseem ceeb raws li cov kev cai tshwj xeeb thiab ib puag ncig, thiab suav nrog nrog rau kev nyab xeeb thiab kho qhov kub thiab txias. Nyob rau tib lub sijhawm, kev saib xyuas yuav tsum tau them rau qhov zoo ntawm cov cua kub dissipation, tiv thaiv overload, thiab kev tshuaj xyuas tsis tu ncua kom ntseeg tau tias kev ua haujlwm txhim khu kev qha ntawm cov hlau tsis kam.