Pulse pab pawg tiv thaiv kev hloov hluav taws xob
Kev hloov hluav taws xob tuaj yeem siv los ua ib qho khoom siv hluav taws xob ib leeg, tab sis ntau zaus, kev hloov hluav taws xob yog siv los ua ib feem ntawm txhua yam khoom siv hluav taws xob. Yog li ntawd, kev hloov fais fab mov muaj nws qhov tshwj xeeb, thiab cov khoom siv hluav taws xob sib txawv ntawm kev hloov hluav taws xob muaj feem cuam tshuam nrog kev siv ib txwm siv ntawm txhua yam khoom siv hluav taws xob. Vim li no, EMC kev ua tau zoo ntawm cov khoom siv hluav taws xob nyob ntawm EMC kev ua haujlwm ntawm kev hloov hluav taws xob ua ntej.
① Pulse pab pawg tiv thaiv ntawm kev hloov fais fab mov.
Raws li kev hloov pauv fais fab mov muaj kev txhawj xeeb, tsis hais lub tswv yim lim ntawm kev hloov hluav taws xob, qhov hloov
Qhov cuam tshuam ntawm lub zog hluav taws xob hluav taws xob hauv nws tus kheej ntawm kev cuam tshuam tawg yog qhov tsawg heev. Qhov laj thawj tseem ceeb yog qhov tseem ceeb ntawm kev cuam tshuam tawg yog qhov kev cuam tshuam ntau zaus, thiab cov lim capacitors hauv kev hloov hluav taws xob hloov hluav taws xob yog tag nrho cov teeb tsa kom txo qis zaus sib txawv-hom cuam tshuam. Electrolytic capacitors tsis txaus los cuam tshuam lub ripple ntawm kev hloov fais fab mov nws tus kheej, cia nyob ib leeg lub mem tes tawg cuam tshuam nrog harmonic Cheebtsam saum 60MHz. Yog li ntawd, thaum soj ntsuam cov mem tes tawg waveforms ntawm lub tswv yim thiab cov zis ntawm kev hloov fais fab mov nrog oscilloscope, tsis muaj qhov pom tseeb tshwm sim.
Xav tias kev cuam tshuam tawg yog kev cuam tshuam ntau hom.
Raws li kev hloov pauv hluav taws xob muaj kev txhawj xeeb, kev siv lub tshuab lim tawm yog thawj qhov tseem ceeb rau kev txwv cov pab pawg mem tes cuam tshuam los ntawm kev hloov hluav taws xob.
Qhov thib ob, tus tsim ntawm high-frequency transformer nyob rau hauv switching fais fab mov kab, tshwj xeeb tshaj yog cov kev saws me nyuam ntawm shielding ntsuas, muaj ib tug tej yam inhibitory nyhuv ntawm pulse pab pawg neeg cuam tshuam.
Tsis tas li ntawd, tus choj capacitor nruab nrab ntawm lub hauv paus Circuit Court thiab theem nrab ntawm cov khoom siv hluav taws xob hloov pauv tuaj yeem muab txoj hauv kev rau kev cuam tshuam hom uas nkag mus rau theem nrab ntawm lub hauv paus Circuit Court kom rov qab mus rau thawj lub voj voog, uas yog.
Nws kuj muaj qee yam cuam tshuam rau kev cuam tshuam ntawm pab pawg pulse.
Thaum kawg, ntxiv ib hom kev lim dej (hom hom choke thiab hom-hom capacitor) ntawm qhov tso zis ntawm cov khoom siv hluav taws xob hloov pauv tuaj yeem ua lub luag haujlwm qee yam hauv kev cuam tshuam qhov tawg.
Tsis tas li ntawd, qhov hloov hluav taws xob hloov hluav taws xob nws tus kheej tsis muaj qhov cuam tshuam rau kev cuam tshuam tawg, tab sis yog tias qhov kev teeb tsa hluav taws xob hloov hluav taws xob tsis zoo, nws yuav ua rau muaj kev cuam tshuam ntawm kev tawg mus rau hauv lub zog hloov hluav taws xob. Tshwj xeeb, qhov tseem ceeb ntawm kev cuam tshuam tawg yog kev sib xyaw ua ke thiab kev cuam tshuam hluav taws xob. Txawm hais tias qhov kev cuam tshuam cuam tshuam ntawm kev cuam tshuam yog cuam tshuam vim yog kev siv lub lim dej tawm, cov hluav taws xob cuam tshuam nyob ib puag ncig cov kab sib txuas tseem muaj, thiab nws tseem muaj peev xwm ua rau cov hluav taws xob cuam tshuam hauv qhov tawg cuam tshuam los ntawm kev teeb tsa ntawm lub zog hloov hluav taws xob ( thawj los yog theem nrab Circuit Court layout ntawm lub switching fais fab mov yog qhib heev, tsim ib tug "loj voj kav hlau txais xov"), yog li cuam tshuam rau kev tiv thaiv kev cuam tshuam ntawm tag nrho cov khoom.
(2) Hais txog cov mem tes tawg ntawm kev hloov hluav taws xob, dab tsi yuav tsum tau them sai sai rau hauv kev ntsuas pulse tawg ntawm cov khoom siv hluav taws xob.
Thaum cov pab pawg pulse tiv thaiv kev cuam tshuam ntawm kev siv hluav taws xob sab ntawm cov khoom siv hluav taws xob tau ua tiav, peb yeej
Kev saib xyuas yuav tsum tau them rau kev tiv thaiv kev cuam tshuam kev ua haujlwm ntawm cov khoom siv hluav taws xob, tab sis peb yuav tsum tsis txhob hnov qab qhov tseeb tias qhov tseem ceeb ntawm kev cuam tshuam tawg yog kev sib txuas ntawm kev cuam tshuam thiab hluav taws xob cuam tshuam. Yog li ntawd, thaum cov khoom siv hluav taws xob tseem tsis tau dhau qhov kev ntsuas no tom qab ntsuas qhov tsim nyog, peb yuav tsum muab peb tus kheej tso rau hauv lwm lub khau thiab xav txog seb qhov kev cuam tshuam yuav nkag mus rau hauv cov cuab yeej siv los ntawm lwm txoj kev, ua rau cov duab cuav uas cov khoom siv hluav taws xob tau tawg. kev xeem ntawm cov cuab yeej siv tsis tsim nyog.
Piv txwv li, thaum peb ua qhov ntsuas pulse pab pawg tiv thaiv kab hluav taws xob, peb nyob hauv hluav taws xob tiag tiag
Muaj ib qho hluav taws xob hluav taws xob hluav taws xob ntau zaus nrog ib qho kev siv zog hauv qhov chaw nyob ib puag ncig ntawm kab. Yog hais tias cov cuab yeej muaj lwm yam kev sib txuas lus thiab cov tswv yim / tso zis sib txuas nrog rau cov kab hluav taws xob, nws tseem tuaj yeem lees txais qhov induction ntawm high-frequency electromagnetic teb los ntawm passive kav hlau txais xov muaj nuj nqi ntawm cov kab no thiab qhia rau hauv cov khoom siv. Tsis tas li ntawd, thaum cov kab hluav taws xob sab hauv ntawm cov khoom siv ze ze rau lub casing; Cov cuab yeej siv lub tshuab tsis yog xim hlau; Los yog lub kaw lus electromagnetic nruj nreem nyob ze ntawm cov xaim tsis zoo, nws tseem tuaj yeem ua rau muaj hluav taws xob ntau zaus hluav taws xob electromagnetic teb uas tsim los ntawm cov pab pawg mem tes cuam tshuam, ua rau tsis muaj kev tiv thaiv kev tiv thaiv ntawm cov khoom siv.
