Taw qhia rau daim ntawv thov ntawm cov hlau nplaum hlaws dai hauv hloov fais fab hluav taws xob EMC tsim
EMC tau dhau los ua qhov teeb meem kub thiab nyuaj hauv cov qauv hluav taws xob niaj hnub no thiab tsim khoom. Qhov teeb meem EMC hauv cov ntawv thov kev siv tau yog qhov yooj yim heev thiab tsis tuaj yeem daws tau txoj kev paub ntawm theoretical ib leeg. Nws pub ntau ntxiv rau cov kev paub ntawm cov tshuab hluav taws xob. Txhawm rau kom tau zoo dua EMC qhov teeb meem ntawm cov khoom hluav taws xob, cov khoom tseem ceeb muaj xws li kev tsim qauv, kev tsim qauv cable, thiab lwm yam teeb meem.
Kab lus no piav txog qhov tseem ceeb ntawm cov hlau nplaum hauv EMC piv txog kev hloov hom fais fab tsim kho thaum tsim cov khoom lag luam tshiab.
1. Ferrite Electromagictication ofFerver sib sau
Ferrite yog cov khoom siv ferromagnetic nrog cov lus sau ua lotuav. Nws cov txheej txheem tsim khoom thiab cov khoom siv mechanies yog qhov zoo sib xws rau Ceramics, thiab nws cov xim yog xim dub. Cov hom kev sib nqus uas ua ib txwm muaj nyob hauv cov khoom siv hluav taws xob hluav taws xob cov khoom siv hluav taws xob tau tsim rau kev cuam tshuam ferrite los tsim cov khoom siv hluav taws xob. Tus yam ntxwv ntawm cov khoom no yog qhov kev poob siab heev. Kev cuam tshuam tseem ceeb tshaj plaws rau ferrite siv rau subpress electromagnetic cuam tshuam permeability μ thiab seeg magnetic flux ntom bs. Lub sib nqus permeability μ tuaj yeem qhia raws li tus lej nyuaj, nrog feem ntawm txoj kev tsis ncaj ncees thiab feem cuam tshuam txog qhov poob, uas nce nrog zaus. Yog li ntawd, nws sib npaug Circuit Court yog cov series sircuit Court muaj ntawm inductor l thiab ib qho resistor r, ob leeg yog cov haujlwm ntawm cov chaw ua haujlwm. Thaum cov hlau hla dhau ntawm cov cerreite no, lub impedance ntawm inductance tsim tau nce nrog ntau zaus nyob rau hauv cov peev xwm, tab sis cov mechanism yog sib txawv kiag li ntawm ntau zaus.
Nyob rau hauv qhov tsawg zaus ntau, impedance yog tsim los ntawm cov kev rov qab ua los ntawm inductance. Ntawm qis zaus, r yog heev me me thiab cov sib nqus permeability ntawm cov hlau nplaum tseem ceeb yog qhov siab, ua rau muaj kev cuam tshuam loj. L plays lub luag haujlwm tseem ceeb, thiab kev cuam tshuam hluav taws xob hluav taws xob tau cuam tshuam thiab suppressed; Thiab nyob rau lub sijhawm no, kev poob ntawm cov hlau nplaum yog qhov sib nqus me me, thiab tag nrho cov khoom siv tsis tshua muaj siab, uas yog nquag resonance. Yog li ntawd, nyob rau hauv qhov tsawg zaus ntau yam, cuam tshuam kev cuam tshuam ntxiv tuaj yeem tshwm sim tom qab siv Ferrite hlaws.
Nyob rau hauv lub siab ntau zaus ntau, impedance yog tsim los ntawm cov cheebtsam tiv thaiv. Raws li cov zaus nce, lub sib nqus permeability ntawm cov hlau nplaum me me txo qis, ua rau muaj kev txo qis hauv qhov inductive cov kev sib koom tes. Txawm li cas los xij, lub sijhawm no, qhov ploj ntawm cov hlau nplaum tseev nce, thiab cov kev tawm tsam tiv taus nce, ua rau muaj kev nce ntxiv hauv tag nrho cov impedance. Thaum muaj cov cim high-zaus dhau los ntawm ferrite, electromagnetic cuam tshuam yog nqus thiab hloov dua siab tshiab rau hauv lub zog cua sov rau dissipation.
Ferrite kev sib zog tau dav siv hauv cov ntawv luam tawm Circuit Court, cov kab hluav taws xob, thiab cov kab ntawv. Yog tias Ferrite kev sib xyaw tau ntxiv rau lub zog hluav taws xob hauv qhov kawg ntawm cov ntawv luam tawm Circuit Court, cov kev cuam tshuam zoo tuaj yeem siv tau. Ferrite magnetic ib ncig los yog cov hlaws dai tau tsim tshwj xeeb los tsim kev cuam tshuam rau cov kab thiab cov hluav taws xob, thiab lawv kuj muaj cov peev xwm nqus hluav taws xob thiab hluav taws xob.
