Dab tsi yuav cuam tshuam rau Capacitance thiab Zoo ntawm Capacitor?
Apr 12, 2023
Capacitors yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob thiab tuaj yeem siv los ua cov khoom siv hluav taws xob resonant, kev sib txuas thiab cov khoom siv los ntawm kev sib txuas, DC thaiv, siab zaus impedance txuam thiab lub sijhawm, thiab cov ntxaij lim dej. Lawv cov kev siv tau nce ntxiv nyob rau xyoo tas los no vim tias lawv cov hluav taws xob poob qis thiab muaj peev xwm ua haujlwm tau ntau zaus.
Lub Capacitance ntawm lub capacitor yog txhais tau tias yog qhov siab tshaj plaws voltage uas nws tuaj yeem ua haujlwm yam tsis muaj kev ua haujlwm thaum lub sijhawm ua haujlwm. Qhov no tuaj yeem yog DC lossis AC thiab luam tawm ntawm sab ntawm lub capacitor.
Qhov no yog ib qho tseem ceeb heev tus yam ntxwv ntawm lub capacitor, vim nws yuav pab tau koj txiav txim siab seb yuav yuav ib tug los yog tsis thiab yuav siv nws li cas. Nws tseem muab rau koj qhia txog qhov zoo thiab kav ntev ntawm lub capacitor.
Ntau yam yuav cuam tshuam rau lub peev xwm thiab qhov zoo ntawm cov capacitors, xws li los ntawm cov khoom siv mus rau kev tsim khoom. Qee cov tuam txhab txiav cov ces kaum ntawm cov ntaub ntawv uas lawv siv los yog ntawm txoj kev lawv cov capacitors raug tsim, ua rau cov khoom tsis zoo uas yuav tsis ua raws li qhov xav tau.
Ntxiv rau qhov no, qee qhov capacitors muaj qhov kam rau ua tus nqi uas yuav tso cai rau lawv sib txawv me ntsis ntawm lawv cov nominal capacitance. Cov no feem ntau yog ntsuas nrog cov xim dawb lossis cov ntawv los qhia qhov kev zam txim tiag tiag thiab tuaj yeem nyob qhov twg los ntawm -20 feem pua rau ntxiv rau 80 feem pua, nyob ntawm seb hom capacitor.
Cov kev sib txawv no tuaj yeem ua rau qee qhov capacitors poob, tab sis lawv tsis tas yuav tuag. Txawm li cas los xij, lawv tuaj yeem txo lawv qhov kev ua tau zoo thiab ua rau lub neej luv ntawm cov khoom siv.
Lwm qhov tseem ceeb uas tuaj yeem cuam tshuam qhov capacitance thiab qhov zoo ntawm capacitor yog qhov kub thiab txias. Qhov no tuaj yeem ua rau muaj kev hloov pauv hauv cov khoom siv dielectric thiab tuaj yeem ua rau muaj kev cuam tshuam loj heev rau lub peev xwm ntawm lub capacitor.
Cov capacitors uas raug kub siab tuaj yeem ua rau muaj ntau yam teeb meem, suav nrog kev rwb thaiv tsev tsis zoo thiab kev kub ntxhov. Qhov no yog ib qho teeb meem loj, vim nws tuaj yeem txo lub neej ntawm lwm cov khoom nyob ib puag ncig lub capacitor thiab ua rau hluav taws kub lossis tawg.
Kev hloov kub kuj tuaj yeem ua rau degradation ntawm lub capacitors hluav taws xob cov khoom, xws li nws cov resistivity, reactance los yog muaj peev xwm nqa tam sim no. Qhov no tuaj yeem yog ib qho teeb meem thaum siv cov capacitors nyob rau hauv ib puag ncig huab, xws li hauv dav hlau thiab chaw siv.
Capacitance ntawm Ceramic Chips
Ceramic nti capacitors yog lub cim tshiab ntawm cov khoom siv hluav taws xob txhim khu kev qha. Lub monolithic, impervious, inorganic qauv ntawm cov nti capacitors tau tso cai rau lawv siv raws li ib tug resonant caij, DC thaiv cov cuab yeej, siab zaus impedance txuam thiab lub sij hawm lub caij thiab lub lim nyob rau hauv ncua-kab Cheebtsam.
Tam sim no lawv kuj tau siv hauv MRI imaging coils raws li cov no tuaj yeem hloov kho ntawm ntau zaus.
Lub capacitor zoo yog qhov kev xaiv zoo rau cov ntawv thov no vim tias lawv ruaj khov heev thiab yuav tsis muaj suab nrov thermal. RF sib txuam circuits lossis MRI imaging coils, uas yuav tsum raug kho kom raug ntawm cov zaus siab, yog cov piv txwv ntawm daim ntawv thov no uas yuav tsum muaj high-Q capacitor.
Muaj ntau yam uas yuav cuam tshuam rau lub peev xwm thiab qhov zoo ntawm lub capacitor, thiab nws yog ib qho tseem ceeb kom paub txog lawv tag nrho ua ntej koj txiav txim siab. Nws yog qhov zoo tshaj plaws los sab laj nrog ib tus kws paub txog hluav taws xob los xyuas kom meej tias lub capacitor koj yuav yuav muaj kev nyab xeeb thiab ua tau raws li qhov xav tau.
