Qhov tawg ntawm high voltage ceramic capacitor feem ntau tuaj yeem muab faib ua peb pawg. Thaum siv cov capacitors no, cov pob txha tawg tuaj yeem tshwm sim, uas feem ntau ua rau ntau tus kws tshaj lij. Cov capacitors no tau raug sim rau qhov voltage, dissipation factor, ib feem tawm, thiab rwb thaiv tsev tiv thaiv thaum lub sij hawm yuav, thiab tag nrho cov xeem dhau lawm. Txawm li cas los xij, tom qab rau lub hlis lossis ib xyoos ntawm kev siv, qee qhov hluav taws xob hluav taws xob ceramic capacitors tau pom tias tau tawg. Puas yog cov pob txha tawg no tshwm sim los ntawm cov capacitors lawv tus kheej lossis lwm yam ib puag ncig?
Feem ntau, qhov tawg ntawm high voltage ceramic capacitors tuaj yeem raug ntaus nqi raws li hauv qab no peb muaj peev xwm:
Thawj qhov ua tau yog thermal decomposition. Thaum cov capacitors raug rau qhov tam sim no lossis ntev lub sijhawm ua haujlwm siab thiab ua haujlwm siab tam sim no, cov khoom siv ceramic tuaj yeem tsim kom sov. Txawm hais tias qhov hluav taws xob tsim hluav taws xob qeeb, qhov kub thiab txias nce nrawm, ua rau thermal decomposition ntawm qhov kub siab.
Qhov thib ob muaj peev xwm yog tshuaj degradation. Muaj qhov sib txawv ntawm cov molecules sab hauv ntawm cov ceramic capacitors, thiab qhov tsis xws luag xws li cov kab nrib pleb thiab voids yuav tshwm sim thaum lub sij hawm tsim cov txheej txheem capacitor (muaj peev xwm txaus ntshai ntawm kev tsim cov khoom tsis zoo). Nyob rau lub sijhawm ntev, qee cov tshuaj lom neeg tuaj yeem tsim cov pa roj xws li ozone thiab carbon dioxide. Thaum cov gases sib sau ua ke, lawv tuaj yeem cuam tshuam rau txheej txheej encapsulation thiab tsim qhov khoob, ua rau tawg.
Qhov thib peb muaj peev xwm yog ion tawg. High voltage ceramic capacitors cia siab rau ions nquag txav los ntawm kev cuam tshuam ntawm hluav taws xob. Thaum cov ions raug rau qhov chaw hluav taws xob ntev, lawv txoj kev txav mus los tau nce. Nyob rau hauv cov ntaub ntawv ntawm ntau tshaj tam sim no, lub rwb thaiv tsev txheej tuaj yeem raug puas, ua rau tawg.
Feem ntau, cov kev ua tsis tiav no tshwm sim tom qab kwv yees li rau lub hlis lossis ib xyoos. Txawm li cas los xij, cov khoom lag luam los ntawm cov tuam txhab uas tsis zoo yuav ua tsis tau tom qab peb lub hlis xwb. Hauv lwm lo lus, lub neej ntawm cov high voltage ceramic capacitors tsuas yog peb lub hlis mus rau ib xyoos! Yog li ntawd, hom capacitor no feem ntau tsis haum rau cov khoom siv tseem ceeb xws li cov phiajcim ntse thiab cov tshuab hluav taws xob siab. Smart grid cov neeg siv khoom feem ntau xav tau cov capacitors kav ntev li 20 xyoo.
Txhawm rau txuas ntxiv lub neej ntawm capacitors, cov lus qhia hauv qab no tuaj yeem xav txog:
1)Hloov cov khoom siv dielectric ntawm lub capacitors. Piv txwv li, circuits thaum xub thawj siv X5R, Y5T, Y5P, thiab lwm yam Class II ceramics tuaj yeem hloov nrog Class I ceramics zoo li N4700. Txawm li cas los xij, N4700 muaj qhov me me dielectric tas li, yog li cov capacitors ua nrog N4700 yuav muaj qhov loj dua rau tib qhov voltage thiab capacitance. Class I ceramics feem ntau muaj kev tiv thaiv kev tiv thaiv ntau tshaj kaum npaug siab dua li Class II ceramics, muab kev tiv thaiv muaj zog ntau dua.
2)Xaiv cov tuam txhab capacitor nrog cov txheej txheem vuam zoo dua. Qhov no suav nrog qhov flatness thiab flawlessness ntawm ceramic daim hlau, thickness ntawm nyiaj plating, tag nrho ntawm ceramic phaj npoo, qhov zoo ntawm soldering rau txhuas los yog hlau terminals, thiab qib ntawm epoxy txheej encapsulation. Cov ntsiab lus no muaj feem xyuam nrog cov qauv sab hauv thiab cov tsos zoo ntawm cov capacitors. Capacitors nrog cov tsos zoo dua feem ntau muaj kev tsim khoom zoo dua.
Siv ob lub capacitors nyob rau hauv parallel es tsis txhob ntawm ib tug capacitor. Qhov no tso cai rau lub voltage thaum xub thawj los ntawm ib tug capacitor yuav muab faib rau ntawm ob lub capacitor, txhim kho tag nrho durability ntawm capacitor. Txawm li cas los xij, txoj kev no nce nqi thiab xav tau ntau qhov chaw rau kev txhim kho ob lub capacitor.
3) Rau cov hluav taws xob tsis tshua muaj hluav taws xob, xws li 50kV, 60kV, lossis txawm tias 100kV, cov tsoos ib leeg ceramic phaj kev sib xyaw qauv tuaj yeem hloov nrog ob txheej txheej ceramic phaj series lossis cov qauv sib luag. Qhov no siv ob txheej txheej ceramic capacitors los txhim kho qhov hluav taws xob tiv taus muaj peev xwm. Qhov no muab ib tug txaus high voltage margin, thiab qhov loj dua qhov voltage margin, ntev lub neej ntawm lub capacitor. Tam sim no, tsuas yog HVC lub tuam txhab tuaj yeem ua tiav cov qauv sab hauv ntawm high voltage ceramic capacitors siv ob txheej txheej ceramic phaj. Txawm li cas los xij, txoj kev no yog kim thiab muaj cov txheej txheem ntau lawm nyuaj. Yog xav paub meej, thov sab laj nrog pab pawg muag khoom thiab engineering ntawm HVC tuam txhab.
