Kev daws teeb meem EMC ntawm kev sib txuas lus hloov hluav taws xob
Kev sib txuas lus hloov hluav taws xob yog siv dav hauv kev tswj hwm kev sib pauv, cov ntaub ntawv kho qhov muag kis tau tus mob, lub hauv paus chaw nres tsheb wireless, cable TV system thiab ip network vim nws qhov zoo ntawm qhov me me, lub teeb yuag, kev ua haujlwm siab, kev lag luam txhim khu kev qha, thiab kev saib xyuas tej thaj chaw deb. Lub zog tseem ceeb ntawm kev ua haujlwm.
Nrog rau kev txhim kho cov ntaub ntawv thev naus laus zis, cov cuab yeej siv thev naus laus zis tau nthuav dav thoob plaws lub tebchaws, los ntawm cov nroog loj hauv nruab nrab mus rau thaj chaw thaj tsam roob, muab kev yooj yim heev rau kev sib txuas lus thiab kev sib txuas lus ntawm tib neeg. Vim qhov sib txawv ntawm cov nroog thiab cov cheeb tsam nyob deb nroog, lub zog hluav taws xob network ntawm cov khoom siv sib txuas lus muaj ob qho tib si lub zog hluav taws xob ruaj khov hluav taws xob hom thiab kev ywj pheej me me hydropower fais fab mov hom. Nyob rau hauv lub hwj chim mov hom ntawm me me hydropower chaw nres tsheb, vim hais tias ntawm cov kev hloov nyob rau hauv cov dej ntim, loj kev hloov nyob rau hauv cov neeg siv lub hwj chim noj, thiab kev ua hauj lwm tsis ruaj tsis khov ntawm cov khoom siv hluav taws xob, cov kab sib chaws loj waveform distortion thiab loj voltage fluctuations tshwm sim. Ib qho kev sim hnyav yog tsim nrog lub zog hloov hluav taws xob.
Railway kev sib txuas lus thiab hluav taws xob kev sib txuas lus yog tsim thiab nthuav. Vim hais tias cov hluav taws xob locomotive dhau los, muaj zog induced voltage yog generated, uas ua rau ib tug loj fluctuation nyob rau hauv av voltage, uas ua rau ib tug loj fluctuation nyob rau hauv daim phiaj voltage. Qhov hluav taws xob muaj zog yog ib qho yooj yim ua rau qhov tsis ruaj khov tam sim ntawm cov khoom siv hluav taws xob hloov pauv. Txawm hais tias daim phiaj hluav taws xob ruaj khov, kev sib txuas lus hloov hluav taws xob ua haujlwm nyob ze ntawm daim phiaj hluav taws xob high-voltage tau yooj yim cuam tshuam los ntawm kev cuam tshuam ntawm cov hluav taws xob muaj zog los ntawm kab sib chaws hloov pauv.
Kev sib txuas lus hloov cov khoom siv hluav taws xob siv nyob rau hauv cov chaw nres tsheb yog qhov yooj yim dua rau xob laim tawm tsam vim tias lawv feem ntau tau teeb tsa rau cov tsev siab dua lossis roob toj siab.
Yog li ntawd, kev sib txuas lus hloov hluav taws xob yuav tsum muaj lub zog tiv thaiv hluav taws xob cuam tshuam, tshwj xeeb tshaj yog muaj peev xwm hloov kho rau xob laim, surges, thiab daim phiaj hluav taws xob hloov pauv, thiab nws yuav tsum muaj peev xwm tiv thaiv kev cuam tshuam txaus rau electrostatic cuam tshuam, hluav taws xob teb, sib nqus. teb, thiab electromagnetic waves. Xyuas kom muaj kev ua haujlwm zoo ntawm nws tus kheej thiab kev ruaj ntseg ntawm cov khoom siv hluav taws xob rau kev sib txuas lus.
Ntawm qhov tod tes, vim hais tias lub hwj chim hloov raj, rectifier los yog freewheeling diode thiab lub ntsiab fais fab transformer hauv kev sib txuas lus hloov fais fab mov ua hauj lwm nyob rau hauv high voltage, siab tam sim no thiab high zaus hloov hom, qhov voltage thiab tam sim no waveforms feem ntau yog square waves. Nyob rau hauv lub square yoj hloov txheej txheem ntawm high voltage thiab siab tam sim no, loj harmonic voltage thiab tam sim no yuav generated. Ntawm qhov tod tes, cov kev sib raug zoo ntawm cov hluav taws xob thiab cov tam sim no raug xa mus los ntawm cov kab hluav taws xob nkag los yog cov kab tawm ntawm cov khoom siv hluav taws xob hloov, ua rau muaj kev cuam tshuam rau lwm yam khoom siv thiab cov phiaj xwm hluav taws xob uas siv rau tib daim phiaj sib txuas lus, thiab tib lub sijhawm cuam tshuam rau cov khoom siv los ntawm kev sib txuas lus fais fab mov, xws li cov khoom siv tswj kev hloov pauv. , wireless base chaw nres tsheb, cov khoom siv kho qhov muag, thiab cov khoom siv cable TV, thiab lwm yam, uas ua rau muaj kev cuam tshuam rau cov khoom siv, ua rau cov khoom siv tsis tuaj yeem ua haujlwm ib txwm; kev ua haujlwm tsis zoo. Ib feem ntawm lub tshuab hluav taws xob hluav taws xob radiates mus rau qhov chaw nyob ib puag ncig los ntawm qhov sib txawv ntawm qhov hloov hluav taws xob hloov hluav taws xob, thiab nthuav tawm los ntawm qhov chaw ua ke nrog cov hluav taws xob hluav taws xob hluav taws xob tsim los ntawm cov hluav taws xob hluav taws xob thiab DC tso tawm kab, ua rau muaj kev puas tsuaj rau lwm yam khoom siv hluav taws xob ntau. thiab cov khoom siv rhiab rau electromagnetic teb. Kev cuam tshuam, ua rau lwm yam khoom siv ua haujlwm txawv txav.
