Electromagnetic compatibility test technology ntawm switching fais fab mov
(1) Kev ntsuas ntsuas
Lub jamming receiver nrog quasi-peak thiab nruab nrab detectors yuav tsum tau siv, thiab nws cov kev ua tau zoo yuav tsum tau raws li cov kev cai ntawm CISPRL 6-1 los yog lub teb chaws tus qauv GB/T6113.1 (cov lus qhia tshwj xeeb rau xov tooj cua cuam tshuam thiab ntsuas kev tiv thaiv kab mob). Nyob rau hauv ntau zaus muab kev koom tes nyob rau hauv tus qauv, ob jamming receivers nrog txawv zaus bands feem ntau yog siv, uas yog 10 kHz ~ 30 MHz thiab 30 ~ 1000 MHz feem.
(2) Linear impedance stabilization network
Linear impedance stabilization network (LISN) tseem hu ua cov khoom siv hluav taws xob hluav taws xob. LISN (V-hom network) nrog impedance ntawm 50Ω / 50μH yuav tsum tau txais kev pom zoo thaum ua qhov cuam tshuam qhov hluav taws xob / tam sim no ntawm lub hwj huam mov davhlau ya nyob twg, thiab nws cov yam ntxwv yuav tsum ua tau raws li cov cai ntawm CISPRL 6-1 thiab GB / T6113.1. Kev sib txuas LISN muaj ob txoj haujlwm: ua ntej, nws muab tus qauv linear impedance rau lub hwj chim input chaw nres nkoj ntawm EUT ntawm lub siab zaus harmonics, yog li ntawd thaum lwm yam khoom siv txuas nrog tib lub zog hloov pauv, nws yuav tsis cuam tshuam rau lub zog input impedance ntawm EUT; Qhov thib ob, LISN tuaj yeem lim EMI los ntawm daim phiaj hluav taws xob thiab muab "huv" daim phiaj AC fais fab mov rau kev hloov hluav taws xob, uas yuav tsis cuam tshuam rau kev ntsuas ntsuas ntawm kev cuam tshuam rau EUT nws tus kheej.
(3) Kav hlau txais xov
Cov kav hlau txais xov thaiv npog yog siv nyob rau hauv qhov zaus ntawm 10 kHz ~ 30 MHz. Balanced dipole kav hlau txais xov yog siv nyob rau hauv lub zaus band ntawm 30 ~ 1000 MHz.
(4) Qhov chaw kuaj
Feem ntau muaj ob hom kev sim rau EMC kev xeem: ib qho yog ib qho kev tsim qauv thiab kev kuaj sim los yog qhov chaw sim uas tau pom zoo los ntawm EMC cov tub ceev xwm thiab tau ntawv pov thawj los ntawm cov txheej txheem zoo, thiab muaj kev tsim nyog kuaj kev cai. Nws suav nrog kev tiv thaiv chav rau kev cuam tshuam, ua rhiab heev thiab electrostatic paug rhiab heev kuaj, anechoic shielding chav rau kev kuaj hluav taws xob rhiab heev, qhib qhov chaw rau kev kuaj hluav taws xob emission thiab tag nrho cov cuab yeej kuaj thiab tswj cov cuab yeej thiab cov khoom siv. Lwm hom yog EMC chav kuaj nrog qee qhov kev sim ua haujlwm tsim raws li qhov xav tau tiag tiag thiab nyiaj txiag ntawm chav tsev. Piv nrog rau qhov chaw sim, qhov kev sim no zoo li qhov ntsuas me me thiab tus nqi qis, thiab nws yog qhov tsim nyog rau kev kuaj ua ntej kev sib raug zoo thiab kev ntsuam xyuas EMC, uas yog, ua kom cov khoom muaj kev ntsuas tus kheej thiab kev ntsuas ua ntej. EMC ntawv pov thawj.
