EMI tsim kev paub rau kev hloov cov khoom siv fais fab
1. EMI Tau qhov hloov pauv hom fais fab mov
Qhov kev cuam tshuam EMI ntawm hloov lub zog siv hluav taws xob, thiab lwm yam hloov pauv ntawm cov khoom siv hluav taws xob, cov hluav taws xob hluav taws xob sab nraud, hluav taws xob hluav taws xob, sab nraud hluav taws xob, thiab lwm yam.
(1) Lub zog hloov raj
Lub hwj chim hloov ua haujlwm nyob rau hauv ib qho ntawm kev caij tsheb kauj vab nrawm, nrog ob daim DV / DT thiab DT sai. Yog li ntawd, lub hwj chim hloov tsis yog tsuas yog kev cuam tshuam loj ntawm cov hluav taws xob teb txuas, tab sis kuj tseem muaj kev cuam tshuam loj ntawm cov chaw sib nqus txuas.
(2) Cov hluav taws kub hluav taws xob loj
Qhov emi los ntawm cov kev hloov pauv ntau zaus yog kev hloov pauv sai sai, ua kom muaj kev cuam tshuam rau kev xau yuam sij, ua kom muaj zog ntau zaus rau kev sib nqus teb txuas ntxiv.
(3) Rectifier Diode
Lub emi qhov chaw ntawm rectifier dodes yog mas xav nyob rau hauv cov yam ntxwv thim rov qab. Cov Txheej Txheem Sib Kis Sib Nraim Tam Sim No Yuav Tsim Kom Muaj Intructance (Lead Inductance, Kev Nyuaj Siab Computer, thiab lwm yam), ua rau muaj zog hauv hluav taws xob cuam tshuam.
(4) PCB
Ntau meej dua, PCB yog lub txuas txuas nrog cov kev cuam tshuam los ntawm cov ntsiab lus saum toj saud, thiab qhov zoo ntawm pcb ncaj qha sib haum ntawm kev tsim txom cov lus saum toj saud-hais txog EMI cov ntaub ntawv.
2. Kev faib tawm ntawm EMI kis xa mus rau hloov cov khoom siv fais fab
(1) kis cov kev cuam tshuam cov kev cuam tshuam rau kev coj ua
(1) Tshuaj sib txuas
(2) inductive Coupling
(3) Kev Tiv Thaiv Coupling
a. Kuj yuav ua hauj lwm ua ke los ntawm sab hauv kev tiv thaiv ntawm pej xeem fais fab mov
b. Kuj zoo ua ke ua ke los ntawm kev cuam tshuam ntawm cov lag luam hauv av
c. Kuj zoo conduction coupling los ntawm impedance ntawm cov pej xeem kab
(2) kis tau tus kab ke hluav taws xob hluav taws xob kev cuam tshuam
(1) nyob rau hauv hloov hom hwj huam, cov xaim hluav taws xob uas tuaj yeem tsim kho hluav taws xob, thiab tshuaj ntsuam siv hluav taws xob dipole thiab sib nqus dipole theories; Diodes, Capacitors, thiab fais fab hloov cov khoom siv tuaj yeem xav tias yuav hluav taws xob hluav taws xob tuaj yeem xav tias yog kev sib nqus dipoles;
(2) Thaum tsis muaj daim thaiv thaiv lub cev, tus mob hluav taws xob hauv hluav taws xob thiab hluav taws xob dipoles thiab cov ntxig hlau (uas tuaj yeem xav tias yog qhov chaw pub dawb);
(3) Thaum muaj lub cev thaiv npog, xav txog qhov khoob thiab cov qhov ntawm cov thaiv npog, thiab tshuaj xyuas thiab ua lawv cov qauv ntawm cov qauv xau.
