Ib tug multimeter qhia tau hais tias ib cheeb tsam cua sov yog tam sim no 55 ohms, thaum nws yog ib txwm 50. Lub cheeb tsam tseem heats, tab sis nyob rau hauv qis zog. Lub Circuit Court tsis qhib, tab sis ib yam dab tsi tau hloov tus neeg xyuas pib zoo. Qhov kev hloov pauv hloov maj mam no yog qhov ceeb toom ntxov ntawm kev txhim kho hauv kev ua txhaum thiab muab cov ntsiab lus tseem ceeb rau kev tiv thaiv kev poob qis.
Nkag siab qhov nce hauv Kev Tiv Thaiv
Ibnce kev tiv thaiv cua sov cheeb tsam tsis qhib Circuit Courttuaj yeem tshwm sim los ntawm ntau qhov hloov maj mam thiab cuam tshuam cov txheej txheem hauv lub tshuab ua kom sov:
Ib nrab Hlau Stranding Breakage
Nyob rau hauv daim cartridge los yog hloov tau lub tshuab cua sov, cov nichrome hlau tuaj yeem tawg ib nrab ntawm lub sijhawm vim thermal cycling thiab embrittlement. Cov kab ib leeg tuaj yeem txuas nrog, tab sis qhov ua tau zoo ntawm tus ntoo khaub lig- ntu ntu raug txo qis. Ohms tsis dag; a rising trend is a murmur of impending failure, as the remaining strands carry higher current density, accelerating local heating and eventual total failure.
Terminal lossis Junction Corrosion
Corrosion, oxidation, los yog loosening ntawm lub davhlau ya nyob twg kev sib txuas qhia ib tug siab -kuj tiv thaiv nyob rau hauv series nrog lub caij. Qhov kev tiv thaiv hauv cheeb tsam no txo qis tag nrho tam sim no kos los ntawm thaj chaw cua sov. Lub zog yog dissipated raws li cua sov ntawm qhov chaw sib txuas, uas tuaj yeem cuam tshuam cov terminals lossis cov xov hlau yog tias tsis tau txheeb xyuas.
Cua sov Element Alloy Degradation
Nichrome thiab zoo sib xws siab -kub alloys muaj kev maj mam loj hlob thiab oxidation thaum raug kub hnyiab tau ntev. Qhov kev hloov ntawm microstructural no txo qis conductivity, ua rau qeeb tab sis ntsuas tau nce hauv kev ua haujlwm. Txawm tias tsis muaj qhov qhib Circuit Court, lub rhaub hluav taws xob tso zis poob qis.
Diagnostic Approach
Cov txheej txheem kuaj mob suav nrog kev ntsuas qhov tsis kam ntawm ntau lub ntsiab lus:
Element Leads:Ntsuas ncaj qha ntawm lub rhaub ua rau cais cov khoom sab hauv. Kev nyeem ntawv siab dua ntawm no qhia txog kev degradation sab hauv lossis teeb meem xaim stranding.
Sab nraud Terminals thiab Supply Lines:Kev ntsuas qhov ntsuas ntawm lub contactor lossis cov khoom siv tuaj yeem qhia tau siab -kev tiv thaiv kev sib txuas, corrosion, lossis xoob terminals.
Thermal imaging kuj pom zoo. Kev ntsuas cua sov ntawm lub tshuab cua sov, suav nrog cov thawv sib txuas thiab kev sib txuas sab nraud, txheeb xyuas cov chaw kub kub uas lub zog tawg ntawm qhov chaw npaj txhij txog.
Quantitative Insight
Ib qho 10% nce hauv kev tiv thaiv txo lub zog los ntawm kwv yees li 9% rau qhov khoom siv hluav taws xob tas li. Txawm tias me me kev hloov hauv kev tiv thaiv tuaj yeem cuam tshuam rau kev ua haujlwm tau zoo. Kev tshawb pom ntxov tso cai rau kev tiv thaiv kev saib xyuas ua ntej ua tiav qhov tsis ua tiav.
Kev Cai Kho
Internal Element Resistance nce:Kev hloov cov khoom siv cua sov yuav tsum tau ua thaum cov hlau sab hauv lossis cov hlau tsis pom kev degradation.
External Connection Resistance nce:Tightening los yog hloov terminals, connectors, los yog hlau seem rov ua hauj lwm zoo thiab tiv thaiv kom tsis txhob muaj cua sov hauv zos.
Kev saib xyuas tsis tu ncua thiab kev tshuaj xyuas thermal yog cov tswv yim tseem ceeb hauv kev kwv yees thiab txo qis kev ua haujlwm.
Xaus
Kev nce tam sim ntawd nyob rau hauv ib cheeb tsam cua sov qhov tsis kam, txawm tias tsis muaj lub voj voog qhib, yog qhov tseem ceeb thaum ntxov - ceeb toom teeb liab. Ntes ibnce kev tiv thaiv cua sov cheeb tsam tsis qhib Circuit Courtyuav tsum ua kom muaj kev soj ntsuam xyuas hluav taws xob kom zoo los tiv thaiv kev ua tsis tiav tag nrho. Cov hluav taws xob hluav taws xob muaj lawv tus kheej "lub plawv dhia," thiab saib xyuas lawv cov kev sib dhos muab kev nkag siab rau lawv txoj kev noj qab haus huv, ua kom cov cua sov ua haujlwm tau zoo thiab ua tau zoo.
