Kev tshuaj xyuas ntawm Capacitor yam ntxwv hauv EMC Tsim Kev Hloov Cov Khoom Siv Hluav Taws Xob
Ntau tus neeg tsim hluav taws xob tau paub txog lub luag haujlwm ntawm cov lim capacitors hauv cov khoom siv hluav taws xob, tab sis cov lim capacitors siv ntawm qhov kawg ntawm cov khoom siv hluav taws xob hloov pauv txawv ntawm cov lim capacitors siv nyob rau hauv lub hwj chim zaus circuits. Ordinary electrolytic capacitors siv rau kev lim dej hauv cov hluav taws xob zaus hluav taws xob muaj qhov hluav taws xob ntau zaus ntawm 100 Hz thiab them thiab tawm lub sijhawm ntawm millisecond kev txiav txim ntawm qhov loj. Yuav kom tau txais ib qho me me pulsation coefficient, yuav tsum muaj peev xwm txog li ntau pua txhiab tus microfacies, Yog li ntawd, zoo tib yam txhuas electrolytic capacitors feem ntau yog siv rau cov khoom siv tsawg zaus, nrog rau lub hom phiaj ntawm kev txhim kho lub peev xwm. Lub capacitance, poob tangent tus nqi, thiab to tam sim no ntawm capacitors yog lub ntsiab tsis rau qhov txawv lawv qhov zoo thiab qhov tsis zoo.
Raws li electrolytic capacitor siv rau cov zis lim hauv qhov hloov pauv tswj fais fab, qhov zaus ntawm sawtooth yoj voltage ntawm nws tuaj yeem ncav cuag kaum ntawm kilohertz, lossis txawm kaum ntawm megahertz. Nws cov kev xav tau txawv ntawm cov hauv kev siv tsawg zaus, thiab capacitance tsis yog qhov taw qhia tseem ceeb. Nws qhov zoo yog ntsuas los ntawm nws cov yam ntxwv impedance zaus, uas yuav tsum tau kom nws muaj impedance tsawg nyob rau hauv kev khiav hauj lwm zaus ntau ntawm cov hloov tswj fais fab mov. Nyob rau tib lub sijhawm, rau cov khoom siv hluav taws xob sab hauv, Vim lub suab nrov tshaj plaws los ntawm cov khoom siv semiconductor pib ua haujlwm, uas tuaj yeem ncav cuag ntau pua kilohertz thiab tseem muaj cov nyhuv lim dej zoo, cov khoom siv hluav taws xob zoo tib yam feem ntau siv nyob ib ncig ntawm 10 kilohertz rau tsawg zaus, thiab lawv impedance pib tshwm inductive, tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev hloov hluav taws xob siv hluav taws xob.
Lub high-frequency aluminium electrolytic capacitor tshwj xeeb tsim rau kev hloov hluav taws xob tswj hluav taws xob, uas muaj plaub lub terminals. Ob qhov kawg ntawm daim ntawv txhuas zoo yog feem coj tawm raws li qhov zoo electrode ntawm lub capacitor, thiab ob qhov kawg ntawm daim ntawv tsis zoo txhuas kuj tau coj tawm raws li qhov tsis zoo electrode. Tam sim no ntawm cov tswj fais fab mov ntws los ntawm ib qho zoo kawg ntawm plaub lub davhlau ya nyob twg capacitor, dhau los ntawm lub capacitor, thiab tom qab ntawd ntws los ntawm lwm qhov kawg mus rau lub load; Tam sim no rov qab los ntawm lub load kuj ntws los ntawm ib qho tsis zoo kawg ntawm lub capacitor thiab tom qab ntawd los ntawm lwm qhov tsis zoo kawg mus rau qhov tsis zoo kawg ntawm lub hwj chim mov.
Vim hais tias plaub lub davhlau ya nyob twg capacitor muaj cov yam ntxwv siab zaus, nws muab cov txiaj ntsig zoo heev los txo cov ripple tivthaiv ntawm cov zis hluav taws xob thiab txo cov suab nrov nrov nrov.
High zaus txhuas electrolytic capacitors kuj tuaj nyob rau hauv daim ntawv ntawm ntau cores, uas faib cov txhuas ntawv ci mus rau hauv luv luv ntu thiab txuas ntau leads nyob rau hauv parallel kom txo tau cov kuj tivthaiv nyob rau hauv lub capacitance. Nyob rau tib lub sij hawm, cov ntaub ntawv uas tsis tshua muaj resistivity yog siv thiab screws yog siv los ua cov hlau lead terminals los txhim kho lub capacitor lub peev xwm los tiv thaiv cov dej loj.
Stacked capacitors, tseem hu ua non-inductive capacitors, feem ntau muaj ib tug cylindrical core, uas ua rau ib tug loj sib npaug series inductance; Cov qauv ntawm lub stacked capacitor zoo ib yam li cov phau ntawv, tab sis nws raug tshem tawm vim qhov kev taw qhia ntawm qhov sib nqus flux tsim los ntawm cov tam sim no ntws los ntawm nws, yog li txo tus nqi ntawm inductance thiab muaj cov yam ntxwv zoo dua. . Hom capacitor no feem ntau ua rau hauv cov duab square kom yooj yim kho, thiab tuaj yeem txo lub tshuab ntim kom tsim nyog.
Tsis tas li ntawd, muaj plaub lub davhlau ya nyob twg stacked high-frequency electrolytic capacitor uas sib txuas qhov zoo ntawm ob, nrog cov yam ntxwv zoo dua.
