Raws li ib qho ntawm cov khoom siv hluav taws xob ntau tshaj plaws, lub capacitor muaj ntau txoj haujlwm. Lim yog ib qho ntawm cov haujlwm tshaj plaws ntawm cov capacitors. Dab tsi yog filter capacitor? Lub luag haujlwm ntawm lub lim capacitor yog dab tsi?
Capacitance yog ob lub conductors uas nyob ze rau ib leeg thiab insulated ntawm ib leeg.
Lim capacitor yog lub zog cia khoom nruab rau ntawm ob qho kawg ntawm lub voj voog rectifier kom txo tau qhov RIPPLE coefficient ntawm AC pulsation thiab txhim kho cov txiaj ntsig zoo thiab du DC cov zis. Vim hais tias lub lim lim yuav tsum tau lub capacitor cia kom muaj peev xwm loj. Yog li ntawd, feem ntau lim circuits siv electrolytic capacitors. Electrolytic capacitors tau txais lawv lub npe los ntawm kev siv cov electrolytes li electrodes (tsis zoo electrodes).
Lub capacitor (los yog bank ntawm capacitors) txuas nrog lwm yam khoom siv, xws li reactors thiab resistors, los muab cov impedance qis rau ib lossis ntau qhov kev sib haum xeeb. Nws muaj cov yam ntxwv ntawm qhov me me, lub teeb yuag, yooj yim nqa, me me to tam sim no thiab lwm yam.
Lub luag hauj lwm ntawm lim capacitor: lub luag hauj lwm ntawm electrolytic capacitor yog lim tawm qhov tsawg zaus teeb liab nyob rau hauv lub tam sim no, tab sis txawm lub tsawg zaus teeb liab, nws zaus muab faib ua ob peb qhov kev txiav txim ntawm magnitude. Yog li ntawd, txhawm rau kom tsim nyog rau kev siv ntawm ntau zaus, electrolytic capacitors kuj tau muab faib ua cov capacitors ntau zaus thiab tsawg zaus capacitors (ntawm no qhov siab zaus yog txheeb ze).
Qhov tsawg zaus lim capacitor feem ntau yog siv rau kev lim dej tom qab hluav taws xob lim lossis transformer rectification. Nws cov zaus ua haujlwm yog 50Hz, uas zoo ib yam nrog cov mains. Thiab lub siab zaus lim capacitor feem ntau ua haujlwm hauv kev hloov hluav taws xob hloov kho tom qab lim dej, nws qhov ua haujlwm zaus yog ntau txhiab Hz txog kaum txhiab Hz. Thaum tsis tshua muaj zaus lim capacitor siv nyob rau hauv high zaus Circuit Court, vim nws cov yam ntxwv tsis zoo ntawm cov zaus, nws sab hauv kuj thiab sib npaug inductance yog siab thaum them thiab tawm ntawm lub siab zaus. Yog li ntawd, nyob rau hauv kev siv, lub electrolyte yuav ua kom kub loj vim yog nquag polarization. Qhov kub siab dua yuav vaporize cov electrolyte hauv lub capacitor, nce siab hauv lub capacitor, thiab nws thiaj li ua rau lub pob thiab tawg ntawm lub capacitor.
Lub luag hauj lwm ntawm lim capacitor yog tsuas yog siv nyob rau hauv lub hwj chim mov rectifier Circuit Court los lim tawm ac Cheebtsam. Ua kom lub dc ntawm cov zis smoother. Thiab rau precision circuits, kev sib xyaw ntawm shunt capacitor circuits feem ntau yog siv los txhim kho kev ua haujlwm ntawm lim capacitor.
Lub luag hauj lwm ntawm lub lim capacitor yog tsim cov kev khiav hauj lwm sib txawv raws li qhov sib txawv ntawm qhov tsawg thiab siab zaus:
Qhov tsawg zaus lim capacitor feem ntau yog siv rau kev lim dej ntawm lub hauv paus lossis kev hloov pauv hloov pauv, thiab nws cov zaus ua haujlwm yog 50Hz raws li lub hauv paus; Lub siab zaus lim capacitor feem ntau ua haujlwm hauv kev lim dej tom qab hloov hluav taws xob hloov kho, thiab nws cov zaus ua haujlwm yog los ntawm ntau txhiab Hz mus rau kaum tawm txhiab Hz.
Filter capacitor plays lub luag haujlwm tseem ceeb hauv kev hloov hluav taws xob, yuav ua li cas xaiv lim capacitor kom raug, tshwj xeeb tshaj yog kev xaiv cov zis lim capacitor muaj kev txhawj xeeb heev los ntawm txhua tus engineer thiab cov kws tshaj lij.
Electrolytic capacitors siv nyob rau hauv 50 Hz fais fab zaus circuits muaj pulsating voltage zaus ntawm tsuas yog 100 Hz thiab them thiab tawm lub sij hawm ntawm qhov kev txiav txim ntawm milliseconds.
Txhawm rau kom tau txais ib qho me me ripple coefficient, lub capacitance yuav tsum tau mus txog ntau pua txhiab tus micromethods, yog li lub hom phiaj ntawm cov khoom siv hluav taws xob tsawg zaus aluminium electrolytic capacitors feem ntau yog los txhim kho lub peev xwm, capacitor capacitance, poob lub kaum sab xis tus nqi thiab cov xau tam sim no. lub ntsiab tsis tau txheeb xyuas nws qhov zoo thiab qhov tsis zoo.
Cov zis lim electrolytic capacitors hauv kev hloov fais fab mov muaj sawtooth yoj voltage zaus mus txog kaum tawm txhiab tus Hertz, lossis txawm kaum tawm megahertz.
Lub sijhawm no, capacitance tsis yog qhov ntsuas tseem ceeb, thiab tus qauv ntsuas qhov zoo thiab qhov tsis zoo ntawm lub zog siab aluminium electrolytic capacitor yog" impedance zaus" yam ntxwv. Nws yuav tsum muaj qhov sib npaug qis hauv kev ua haujlwm zaus ntawm kev hloov hluav taws xob thiab muaj kev lim dej zoo ntawm cov teeb liab siab zaus uas tsim los ntawm cov khoom siv semiconductor.
Ordinary low-frequency electrolytic capacitors pib qhia sensibility ntawm txog kaum txhiab Hertz, uas tsis tuaj yeem ua tau raws li qhov xav tau ntawm kev hloov hluav taws xob.
Lub high-frequency txhuas electrolytic capacitor rau switching fais fab mov muaj plaub terminals. Ob qhov kawg ntawm daim ntawv zoo txhuas yog feem coj tawm raws li qhov zoo electrode ntawm lub capacitor, thiab ob qhov kawg ntawm daim ntawv tsis zoo txhuas raug coj tawm raws li qhov tsis zoo electrode. Tam sim no nkag los ntawm ib qho zoo kawg ntawm plaub-terminal capacitor, dhau los ntawm lub capacitor, thiab tom qab ntawd ntws mus rau cov khoom thauj los ntawm lwm qhov kawg zoo; Tam sim no rov qab los ntawm lub load kuj ntws los ntawm ib qho tsis zoo kawg ntawm lub capacitor thiab los ntawm lwm qhov tsis zoo kawg mus rau qhov tsis zoo kawg ntawm lub hwj chim mov.
Lub luag haujlwm ntawm lub lim capacitor raws li lub npe qhia yog pom tseeb feem ntau rau kev lim dej.
