Kev ua tsis tiav los ntawm capacitor kev puas tsuaj yog qhov siab tshaj plaws hauv cov khoom siv hluav taws xob, thiab kev puas tsuaj rau cov khoom siv hluav taws xob electrolytic yog feem ntau. Kev ua tau zoo ntawm kev puas tsuaj capacitor yog raws li nram no:

1. Lub peev xwm ua me me; 2. Tsis muaj peev xwm ua tiav; 3. Cov dej ntws; 4. luv Circuit Court.

Capacitors ua lub luag haujlwm sib txawv hauv Circuit Court, thiab qhov ua txhaum lawv ua rau muaj lawv tus yam ntxwv. Nyob rau hauv kev lag luam tswj Circuit Court boards, digital circuits account rau feem coob, thiab capacitors feem ntau yog siv rau lub hwj chim mov filtering, thiab tsawg capacitors yog siv rau cov teeb liab coupling thiab oscillation circuits. Yog hais tias lub electrolytic capacitor siv nyob rau hauv lub switching fais fab mov puas lawm, lub switching fais fab mov yuav tsis co, thiab tsis muaj voltage tso zis; los yog cov zis voltage tsis lim zoo, thiab lub Circuit Court yog logically chaotic vim voltage instability, uas qhia tau hais tias lub tshuab ua hauj lwm zoo los yog tawg tsis hais lub tshuab, yog hais tias lub capacitor yog txuas ntawm lub zoo thiab tsis zoo ncej ntawm lub hwj chim mov. ntawm digital circuit, qhov txhaum yuav zoo ib yam li saum toj no.

Qhov no yog tshwj xeeb tshaj yog pom tseeb nyob rau hauv lub computer motherboards. Ntau lub khoos phis tawj qee zaum tsis qhib tom qab ob peb xyoos, thiab qee zaum lawv tuaj yeem qhib. Qhib rooj plaub, feem ntau koj tuaj yeem pom qhov tshwm sim ntawm electrolytic capacitors bulging, yog tias koj tshem tawm cov capacitors los ntsuas qhov muaj peev xwm, Pom tau tias qis dua tus nqi tiag tiag.

Lub neej ntawm lub capacitor yog ncaj qha ntsig txog qhov kub thiab txias. Qhov siab dua qhov ambient kub, lub neej luv ntawm lub capacitor. Txoj cai no siv tsis tau tsuas yog rau electrolytic capacitors, tab sis kuj rau lwm cov capacitors. Yog li ntawd, thaum nrhiav faulty capacitors, koj yuav tsum tsom mus xyuas cov capacitors uas nyob ze rau lub tshav kub qhov chaw, xws li cov capacitors nyob ib sab ntawm lub dab dej kub thiab high-power Cheebtsam. Qhov ze koj, qhov muaj peev xwm ntawm kev puas tsuaj ntau dua.

Kuv tau kho lub hwj chim ntawm X-ray flaw detector. Tus neeg siv tau tshaj tawm tias cov pa luam yeeb tawm ntawm lub zog hluav taws xob. Tom qab disassembling rooj plaub, nws tau pom tias muaj 1000uF / 350V loj capacitor nrog cov khoom oily ntws tawm. Tshem tawm qee qhov peev xwm Nws tsuas yog kaum ntawm uF, thiab nws pom tias tsuas yog lub capacitor no yog qhov ze tshaj plaws rau lub dab dej kub ntawm tus choj rectifier, thiab lwm qhov nyob deb yog qhov tsis muaj peev xwm. Tsis tas li ntawd, cov khoom siv hluav taws xob ceramic tau luv luv, thiab cov capacitors kuj tau pom tias nyob ze rau cov khoom cua sov. Yog li ntawd, yuav tsum muaj qee qhov tseem ceeb thaum kuaj xyuas thiab kho.

Qee cov capacitors muaj cov dej xau loj heev, thiab tseem hlawv koj txhais tes thaum kov koj cov ntiv tes. Hom capacitor no yuav tsum tau hloov.
Nyob rau hauv cov ntaub ntawv ntawm ups thiab downs thaum lub sij hawm txij nkawm, tshwj tsis yog rau qhov muaj peev xwm ntawm kev sib cuag tsis zoo, feem ntau ntawm cov tsis ua hauj lwm yog tshwm sim los ntawm capacitor puas. Yog li ntawd, thaum ntsib xws li tsis ua hauj lwm, koj tuaj yeem tsom mus xyuas cov capacitors. Tom qab hloov cov capacitors, feem ntau xav tsis thoob (ntawm chav kawm, koj yuav tsum tau them sai sai rau qhov zoo ntawm cov capacitors, thiab xaiv ib hom zoo dua, xws li Ruby, Black Diamond, thiab lwm yam).

1. Cov yam ntxwv thiab kev txiav txim siab ntawm kev tiv thaiv kev puas tsuaj

Nws feem ntau pom tau tias ntau tus neeg pib tshiab yog tossing ntawm qhov kev tawm tsam thaum kho lub voj voog, thiab nws yog dismantled thiab welded. Qhov tseeb, nws tau raug kho ntau heev. Tsuav koj nkag siab txog cov yam ntxwv ntawm kev puas tsuaj, koj tsis tas yuav siv sijhawm ntau.

Kev ua haujlwm tsis zoo yog qhov feem ntau ntawm cov khoom siv hluav taws xob, tab sis nws tsis yog cov khoom uas muaj kev puas tsuaj ntau tshaj plaws. Qhib Circuit Court yog hom kev puas tsuaj feem ntau. Nws yog qhov tsawg uas tus nqi kuj yuav loj dua, thiab tus nqi kuj yuav me dua. Feem ntau muaj xws li carbon film resistors, hlau zaj duab xis resistors, hlau qhov txhab resistors thiab pov hwm resistors.

Thawj ob hom resistors yog siv dav tshaj plaws. Ib qho ntawm cov yam ntxwv ntawm lawv qhov kev puas tsuaj yog tias qhov kev puas tsuaj ntawm qhov tsis zoo (hauv qab 100Ω) thiab kev ua haujlwm siab (siab tshaj 100kΩ) yog siab, thiab tus nqi nruab nrab tsis kam (xws li ntau pua ohms mus rau kaum ntawm kiloohms) Kev puas tsuaj tsawg heev; Qhov thib ob, thaum cov resistors tsis tshua muaj kev puas tsuaj, lawv feem ntau hlawv thiab blackened, uas yog yooj yim mus nrhiav tau, thaum high-resistance resistors tsis tshua muaj puas.

Wirewound resistors feem ntau yog siv rau siab tam sim no limiting, thiab cov kuj tsis loj. Thaum cylindrical hlau qhov txhab resistors hlawv tawm, ib txhia yuav tig dub los yog saum npoo yuav tawg los yog tawg, thiab ib txhia yuav tsis muaj ib tug. Cement resistors yog ib hom hlau qhov txhab tiv thaiv, uas tuaj yeem tawg thaum hlawv tawm, txwv tsis pub yuav tsis muaj qhov pom. Thaum lub fuse resistor kub hnyiab tawm, ib daim tawv nqaij yuav tawg tawm ntawm qee qhov chaw, thiab qee qhov tsis muaj kab, tab sis lawv yuav tsis hlawv lossis tig dub. Raws li cov yam ntxwv saum toj no, koj tuaj yeem tsom mus rau kev kuaj xyuas qhov tsis kam thiab sai sai nrhiav qhov kev puas tsuaj.

Raws li cov yam ntxwv tau teev tseg saum toj no, peb tuaj yeem ua ntej saib seb cov resistors qis ntawm lub rooj tsavxwm tau hlawv cov cim dub, thiab tom qab ntawd raws li cov yam ntxwv uas feem ntau ntawm cov resistors qhib los yog qhov tsis kam yuav loj dua thiab cov resistors siab. yooj yim puas. Peb tuaj yeem siv multimeter ncaj qha ntsuas qhov tsis kam ntawm ob qho kawg ntawm qhov siab-resistor ntawm lub rooj tsav xwm Circuit Court. Yog hais tias qhov ntsuas tsis kam yog siab dua qhov nominal tsis kam, qhov kev tiv thaiv yuav tsum raug puas tsuaj (nco ntsoov tias qhov kev tiv thaiv yog qhov ruaj khov ua ntej cov zaub hauv qhov xaus, vim tias tej zaum yuav muaj cov khoom sib luag hauv Circuit Court, muaj cov nqi thiab cov txheej txheem tawm), yog qhov ntsuas tsis kam yog me dua qhov nominal tsis kam, nws feem ntau tsis quav ntsej. Nyob rau hauv txoj kev no, txhua qhov kev tawm tsam ntawm lub rooj tsav xwm hluav taws xob tau ntsuas dua, txawm tias ib txhiab yog "tua tsis raug", ib tus yuav tsis nco.

Qhov thib ob, txoj kev txiav txim siab ntawm kev ua haujlwm amplifier

Nws yog ib qho nyuaj rau txiav txim siab qhov zoo ntawm kev ua haujlwm amplifiers rau ntau tus kws kho hluav taws xob, tsis yog qib kev kawm nkaus xwb (muaj ntau tus neeg kawm tiav undergraduates, yog tias koj tsis qhia, lawv yuav twv yuav raug hu tsis tau, nws yuav siv sijhawm ntev los nkag siab, muaj. ib qho tshwj xeeb Tib yam muaj tseeb rau cov tub ntxhais kawm tiav uas cov kws qhia ntawv tab tom kawm tswj inverter!), Kuv xav tham nrog koj ntawm no, thiab vam tias nws yuav pab tau rau txhua tus.

Qhov zoo tshaj plaws ua haujlwm amplifier muaj cov yam ntxwv ntawm "virtual luv" thiab "virtual so", ob tus yam ntxwv no muaj txiaj ntsig zoo rau kev tshuaj xyuas kev ua haujlwm amplifier Circuit Court ntawm daim ntawv thov linear. Txhawm rau kom ntseeg tau tias daim ntawv thov linear, op amp yuav tsum ua haujlwm hauv lub voj kaw (cov lus tsis zoo). Yog tias tsis muaj kev tawm tswv yim tsis zoo, qhov op amp nyob rau hauv qhib-voj amplification ua tus piv. Yog tias koj xav txiav txim siab qhov zoo ntawm lub cuab yeej, koj yuav tsum xub paub qhov txawv ntawm lub cuab yeej siv los ua ib qho amplifier los yog kev sib piv hauv Circuit Court.