Kev tsom xam ntawm electromagnetic compatibility tsim qauv ntawm kev hloov fais fab mov
1 Internal qhov chaw ntawm kev cuam tshuam
● Hloov Circuit Court
Lub tshuab hluav taws xob hloov hluav taws xob feem ntau yog tsim los ntawm lub raj xa hluav taws xob thiab lub tshuab hluav taws xob ntau zaus. Lub raj xa hluav taws xob thiab nws lub dab dej kub tau faib cov peev txheej nrog cov hlau lead hauv cov ntaub ntawv thiab cov khoom siv hluav taws xob, thiab du / dt nws tsim muaj qhov loj amplitude mem tes nrog qhov dav bandwidth thiab nplua nuj nyob rau hauv harmonics. Switching tube load rau high-frequency transformer thawj kauj, yog inductive load. Thaum qhov kev coj ua thawj coj ntawm lub raj hloov tawm, qhov xau inductance ntawm lub tshuab hluav taws xob ntau zaus ua rau muaj qhov tsis txaus ntseeg E=-Ldi / dt, tus nqi uas yog proportional rau tus nqi hloov pauv ntawm cov khoom tam sim no, proportional rau Lub to taub inductance, iterated ntawm lub kaw lus voltage, tsim ntawm lub shutdown voltage spike, yog li tsim ib tug conduction cuam tshuam.
● Rectifier diode ntawm rectifier circuit
Cov zis rectifier diode txiav tawm nrog qhov rov qab tam sim no uas nws lub sijhawm rov qab mus rau xoom yog cuam tshuam nrog rau yam xws li kev sib tshuam capacitance. Nws ua rau muaj qhov sib txawv loj tam sim no di / dt nyob rau hauv kev cuam tshuam ntawm transformer to inductance thiab lwm yam kev faib tawm, ua kom muaj zog muaj zog cuam tshuam nrog ntau zaus mus txog kaum tawm megahertz.
● Spurious tsis
Raws li kev khiav hauj lwm ntawm cov zaus ntau dua, cov yam ntxwv ntawm cov khoom siv tsawg zaus hauv kev hloov hluav taws xob hloov pauv, ua rau lub suab nrov. Nyob rau hauv high zaus, spurious tsis muaj feem xyuam rau cov yam ntxwv ntawm lub coupling channel, thiab cov tis capacitance ua lub channel rau electromagnetic cuam tshuam.
2 Sab nraud qhov chaw cuam tshuam
Lwm qhov chaw ntawm kev cuam tshuam tuaj yeem muab faib ua hluav taws xob cuam tshuam thiab kev cuam tshuam xob laim, thiab kev cuam tshuam hluav taws xob rau "hom hom" thiab "hom txawv" txoj kev. Nyob rau tib lub sijhawm, vim AC lub zog hluav taws xob txuas ncaj qha mus rau tus choj rectifier thiab lim Circuit Court, nyob rau hauv ib nrab lub voj voog, tsuas yog lub sijhawm siab tshaj plaws ntawm cov khoom siv hluav taws xob input tam sim no, uas ua rau lub zog hluav taws xob tsawg heev ntawm cov khoom siv hluav taws xob ( txog 0.6). Tsis tas li ntawd, qhov tam sim no muaj ntau cov khoom sib haum xeeb tam sim no, uas tuaj yeem "ua paug" kab sib chaws nrog kev sib haum xeeb.
