Dab tsi yog lub suab nrov uas EMI lim tuaj yeem cuam tshuam nrog?

Nrog rau kev loj hlob sai ntawm kev tshawb fawb thiab thev naus laus zis niaj hnub no, cov khoom siv hluav taws xob, hluav taws xob hluav taws xob, thiab cov khoom siv hluav taws xob tau siv ntau dua. Lub high-density, dav-spectrum electromagnetic signals generated los ntawm lawv thaum lub sij hawm ua hauj lwm sau tag nrho cov chaw, tsim ib tug complex electromagnetic ib puag ncig.
Lub hwj chim ntawm cov khoom siv hluav taws xob, xws li 220V / 50Hz AC lub zog hluav taws xob lossis 115V / 400Hz AC generator, muaj ntau yam EMI suab nrov. Ntawm lawv, cov khoom siv hluav taws xob EMI cuam tshuam, xws li xov tooj cua xa xov tooj cua ntawm ntau yam 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 kev sib txuas ntawm cov khoom siv hluav taws xob. Hluav taws xob rotating machinery thiab ignition systems yuav tsim cov txheej txheem ib ntus thiab hluav taws xob nrov cuam tshuam rau hauv inductive load circuit; kuj tseem muaj qhov cuam tshuam ntawm ntuj, xws li xob laim tawm tshwm sim thiab lub suab nrov cosmic cuam tshuam. Tus qub muaj lub sijhawm luv luv tab sis lub zog siab, thiab tom kawg muaj ntau zaus. Tsis tas li ntawd, cov khoom siv hluav taws xob hauv hluav taws xob lawv tus kheej kuj tseem yuav tsim cov suab nrov thermal thaum ua haujlwm.
Cov suab nrov electromagnetic cuam tshuam no yuav cuam tshuam rau kev ua haujlwm ib txwm muaj ntawm ntau yam khoom siv hluav taws xob ua haujlwm hauv ib puag ncig los ntawm hluav taws xob thiab kev sib txuas.
Ntawm qhov tod tes, cov khoom siv hluav taws xob kuj tseem yuav tsim ntau lub suab nrov ntawm electromagnetic cuam tshuam thaum ua haujlwm. Piv txwv li, digital circuits siv mem tes signals (square waves) los sawv cev rau kev sib raug zoo. Kev soj ntsuam ntawm lawv cov pulse waveforms qhia tau hais tias lawv cov harmonic spectrum ntau yog dav heev. Tsis tas li ntawd, muaj cov tsheb ciav hlau mem tes nrog ntau zaus rov ua dua hauv digital circuits. Cov tsheb ciav hlau mem tes no muaj ntau dua kev sib haum xeeb, dav spectrums, thiab ntau lub suab nrov ntawm electromagnetic cuam tshuam.
Ntau hom kev tswj hwm cov khoom siv hluav taws xob kuj yog qhov cuam tshuam ntawm electromagnetic. Hauv cov khoom siv hluav taws xob linear tswj, unidirectional pulsating tam sim no tsim los ntawm rectification tuaj yeem ua rau muaj kev cuam tshuam electromagnetic; Hloov cov khoom siv hluav taws xob muaj qhov zoo ntawm qhov me me thiab kev ua haujlwm siab, thiab tau siv dav 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 lawv tus kheej muaj zog heev ntawm EMI suab nrov. EMI suab nrov lawv tsim muaj ob qho tib si ntau zaus thiab kev 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 EMI suab nrov cuam tshuam rau cov analog circuits, lub teeb liab-rau-suab nrov piv ntawm cov teeb liab kis tau tus mob yuav deteriorate. Hauv qhov xwm txheej hnyav, lub teeb liab yuav raug xa mus los ntawm EMI suab nrov thiab tsis tuaj yeem ua tiav. Thaum EMI suab nrov cuam tshuam rau digital circuits, nws yuav ua rau muaj kev sib raug zoo hauv kev sib raug zoo thiab 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, kev tiv thaiv hluav taws xob, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, thiab lwm yam. Cov circuits yog qhov nyuaj heev. Cov circuits no feem ntau yog tsim los ntawm kev sib xyaw ua ke los yog tshwj xeeb. Thaum lawv ua haujlwm tsis zoo vim muaj kev cuam tshuam ntawm electromagnetic, lub zog hluav taws xob yuav tsum tsis ua haujlwm, ua rau cov khoom siv hluav taws xob tsis ua haujlwm zoo. 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.