Dab tsi yog kev ua haujlwm ntawm kev siv suab nrov hauv cov khoom siv fais fab
Lub zog hluav taws xob ntawm cov khoom siv hluav taws xob, xws li 220V / 50Hz AC zog daim phiaj lossis 115V / 400Hz AC generators, muaj ntau hom EMI suab nrov. Ntawm lawv, cov khoom siv hluav taws xob EMI cuam tshuam, xws li xov tooj cua xa xov tooj cua los ntawm ntau lub radar, navigation, kev sib txuas lus thiab lwm yam khoom siv, yuav ua rau muaj hluav taws xob cuam tshuam cov teeb liab ntawm cov kab hluav taws xob thiab txuas cables ntawm cov khoom siv hluav taws xob. Hluav taws xob rotating machinery thiab ignition systems yuav tsim cov txheej txheem ib ntus thiab radiated suab cuam tshuam nyob rau hauv inductive load circuits; Kuj tseem muaj qhov chaw cuam tshuam, xws li xob laim tawm tshwm sim thiab lub suab nrov ntawm electromagnetic cuam tshuam hauv lub ntiaj teb. Tus qub muaj lub sijhawm luv luv tab sis lub zog siab, thaum tom kawg muaj ntau zaus. Tsis tas li ntawd, cov khoom siv hluav taws xob hauv hluav taws xob lawv tus kheej kuj tsim cov suab nrov thermal thaum ua haujlwm.
Cov suab nrov electromagnetic cuam tshuam, ua ke los ntawm hluav taws xob thiab kev coj ua, tuaj yeem cuam tshuam rau kev ua haujlwm ib txwm muaj ntawm ntau yam khoom siv hluav taws xob ua haujlwm hauv ib puag ncig.
Ntawm qhov tod tes, cov khoom siv hluav taws xob kuj tsim ntau hom electromagnetic cuam tshuam lub suab nrov thaum ua haujlwm. Piv txwv li, digital circuits siv mem tes signals (square waves) los sawv cev rau kev sib raug zoo, thiab Fourier tsom xam ntawm lawv cov pulse waveforms qhia ntau yam kev sib haum xeeb. Tsis tas li ntawd, muaj ntau zaus rov ua cov tsheb ciav hlau hauv digital circuits, uas muaj kev sib haum xeeb zoo dua, qhov dav dav dua, thiab ntau lub suab nrov ntawm electromagnetic cuam tshuam.
Ntau hom kev tswj fais fab lawv tus kheej kuj yog qhov chaw ntawm electromagnetic cuam tshuam. Nyob rau hauv ib tug linear tswj fais fab mov, lub unidirectional pulsating tam sim no tsim los ntawm rectification tuaj yeem ua rau electromagnetic cuam tshuam; Hloov cov khoom siv hluav taws xob muaj qhov zoo ntawm qhov me me thiab kev ua haujlwm siab, thiab tau siv ntau dua hauv cov khoom siv hluav taws xob niaj hnub no. Txawm li cas los xij, vim tias lawv nyob hauv lub xeev hloov pauv thaum lub zog hloov pauv, lawv yog qhov muaj zog ntawm EMI suab nrov. Lub suab nrov EMI tsim los ntawm lawv muaj ntau zaus thiab siv siab. Cov suab nrov ntawm electromagnetic cuam tshuam kuj ua rau qhov chaw electromagnetic cuam tshuam los ntawm hluav taws xob thiab conduction, yog li cuam tshuam rau kev ua haujlwm ntawm lwm yam khoom siv hluav taws xob.
Rau cov khoom siv hluav taws xob, thaum lub suab nrov EMI cuam tshuam rau cov analog circuits, nws tuaj yeem ua rau lub teeb liab-rau-suab nrov ntawm cov teeb liab kis tau tus mob, thiab thaum muaj xwm txheej hnyav, lub teeb liab yuav raug cuam tshuam los ntawm EMI suab nrov thiab tsis tuaj yeem ua tiav. Thaum EMI suab nrov cuam tshuam rau digital circuits, nws tuaj yeem ua rau muaj kev sib raug zoo tsis raug, ua rau cov txiaj ntsig tsis raug.
Rau cov khoom siv hluav taws xob, ntxiv rau lub zog hloov hluav taws xob, kuj tseem muaj cov khoom siv hluav taws xob, hluav taws xob tswj hluav taws xob, hluav taws xob tiv thaiv hluav taws xob, hluav taws xob hluav taws xob hauv hluav taws xob, hluav taws xob hluav taws xob hluav taws xob, hluav taws xob hluav taws xob, hluav taws xob hluav taws xob, hluav taws xob hluav taws xob, hluav taws xob hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob Cov circuits no feem ntau yog tsim los ntawm kev sib koom ua ke los yog tshwj xeeb. Thaum lawv malfunction vim electromagnetic cuam tshuam, lub hwj chim mov yuav tsum tsis txhob ua hauj lwm, ua rau cov khoom siv hluav taws xob malfunction. Kev siv cov hluav taws xob hluav taws xob cov suab nrov tuaj yeem tiv thaiv lub zog hluav taws xob los ntawm kev ua haujlwm tsis zoo vim muaj kev cuam tshuam sab nraud electromagnetic.
