Taw qhia rau capacitor cov yam ntxwv hauv EMC tsim ntawm hloov hluav taws xob muab
Ntau cov neeg tsim hluav taws xob tau paub txog lub luag haujlwm ntawm kev lim lub zog siv hluav taws xob, tab sis lub lim dej hloov tau hom hluav taws xob hloov kho cov khoom siv hluav taws xob. Cov khoom siv hluav taws xob tsis zoo siv rau kev lim hauv lub zog hluav taws xob ntau zaus 100 HZ thiab lub sijhawm them nyiaj rau ntawm kev txiav txim ntawm milliseconds. Txhawm rau kom tau txais ib qho me me pulsefficient, muaj peev xwm capacitance txog ntau pua txhiab tus microfarads yuav tsum muaj. Yog li ntawd, zoo dog dig txhuas electrolytic capacitors feem ntau siv rau cov khoom lag luam tsawg zaus, nrog lub hom phiaj ntawm kev nce siab tau. Qhov muaj peev xwm, tsis muaj nuj nqis tangent tus nqi, thiab tochan tam sim no cov capacitors yog cov tsis tau siv los paub qhov txawv ntawm lawv cov txiaj ntsig thiab qhov tsis zoo.
Raws li cov khoom siv electrolytic siv rau cov zis lim hauv hloov hom hwj chim, qhov ntau ntawm kiloherertz, lossis tseem yog kaum tawm megahertz. Nws cov kev xav tau txawv ntawm cov ntawv thov tsawg-zaus, thiab capacitance tsis yog qhov taw qhia tseem ceeb. Qhov kev ntsuas ntawm nws qhov zoo yog nws cov yam ntxwv cuam tshuam ntau zaus, uas xav tau kom nws muaj qhov tsis tshua muaj qhov ntau ntawm cov khoom siv hloov hluav taws xob. Nyob rau tib lub sijhawm, rau sab hauv cov fais fab mov, vim lub suab ntse tsim los ntawm cov cuab yeej pib pib ua haujlwm, nws kuj tseem tuaj yeem muaj cov nyhuv filting zoo. Feem ntau, rau cov electrolytic capacitors siv nyob rau ntawm qis zaus nyob ib ncig ntawm 10 kilohertz, lawv lub siab xav ua kom tau raws li qhov yuav tsum tau hloov khoom hom fais fab tuag.
Lub zog loj heev Ob qhov kawg ntawm qhov zoo txhuas phaj yog feem ua raws li qhov zoo electrode ntawm lub capacitor, thiab ob xaus ntawm qhov tsis zoo txhuas phaj kuj tseem pheej coj los ua qhov tsis zoo electrode. Tam sim no cov kev tswj hwm lub zog hluav taws xob ntws tawm ntawm ib qho chaw nyob zoo ntawm plaub lub chaw nres tsheb, hla dhau ntawm sab hauv ntawm lub capacitor, thiab ces ntws tawm ntawm lwm qhov chaw nyob zoo rau lub nra; Qhov tam sim no rov qab los ntawm lub nra tsis ntws los ntawm ib qho chaw tsis zoo ntawm lub catacitor, thiab tom qab ntawd los ntawm lwm qhov kev tsis zoo ntawm lub chaw tsis zoo ntawm lub zog.
Vim hais tias plaub lub chaw nres tsheb muaj peev xwm muaj cov yam ntxwv zoo tshaj plaws, nws muab qhov txiaj ntsig zoo tshaj plaws los txo cov zis hluav taws xob thiab suppress hloov nrov.
Kev loj heev txhiv pob hluav taws xob tsis muaj peev xwm ua kom muaj ntau yam kev ua kom muaj ntau yam ua rau muaj cov tshuaj tiv thaiv ntau yam kom txo cov kab ke tsis kam nyob hauv qhov chaw nres tsheb. Nyob rau tib lub sijhawm, cov khoom siv tsis tshua muaj siv thiab cov screws yog siv los ua cov kev coj ua tawm kom txhim kho lub capacitor cov peev xwm tiv thaiv kom siab siab.
Cov khoom siv capacitors, tseem hu ua tsis inductiving coracitors, feem ntau muaj cylindrical cores rau electrolytic capacitors, uas ua rau muaj kev sib npaug sib npaug ntawm cov kab ke; Cov qauv ntawm lub capacitor tau zoo ib yam li ntawm phau ntawv, raws li cov hlau nplaum flux tsim tawm los ntawm qhov tam sim no ntws tawm los ntawm qhov tseem ceeb tam sim no, yog li txo qhov txiaj ntsig inductance thiab muaj cov yam ntxwv zoo dua. Hom caport yog tsim nyob rau hauv ib lub square cov duab rau kev kho kom yooj yim thiab tuaj yeem txo qhov loj ntawm cov cuab yeej siv.
