Kev daws teeb meem rau electromagnetic compatibility (EMC)
Nyob rau hauv cov nqe lus ntawm peb lub ntsiab ntawm electromagnetic compatibility, los daws qhov teeb meem electromagnetic compatibility ntawm switching fais fab mov, peb tuaj yeem pib los ntawm peb yam: ua ntej, kom txo tau cov teeb meem teeb meem tshwm sim los ntawm qhov tsis zoo; thib ob, txiav tawm txoj kev nthuav tawm ntawm cov teeb liab tsis zoo; thiab thib peb, txhawm rau txhim kho qhov muaj peev xwm tiv thaiv kev ua phem ntawm lub cev tsis zoo. Hauv kev daws teeb meem sab hauv ntawm kev hloov cov khoom siv hluav taws xob, cov saum toj no peb txoj kev tuaj yeem siv tau zoo, raws li tus nqi-cov txiaj ntsig piv thiab qhov yooj yim ntawm kev siv. Yog li ntawd, cov teeb meem sab nraud uas tsim los ntawm kev hloov cov khoom siv hluav taws xob, xws li cov kab hluav taws xob sib haum xeeb, cov kab hluav taws xob hluav taws xob tsis zoo, thiab hluav taws xob hluav taws xob hluav taws xob hluav taws xob tsis zoo, tsuas yog daws tau los ntawm kev txo qhov tsis txaus ntseeg. Ntawm qhov tod tes, koj tuaj yeem txhim kho tus qauv tsim ntawm lub tswv yim / tso zis lim Circuit Court, txhim kho kev ua haujlwm ntawm APFC Circuit Court, txo cov raj hloov thiab rectifier, tam sim no diode voltage, tam sim no tus nqi ntawm kev hloov, kev siv ntau yam ntawm soft- switching circuit topology thiab tswj, thiab lwm yam .; Ntawm qhov tod tes, txhawm rau ntxiv dag zog rau cov nyhuv shielding ntawm lub chassis, txhim kho lub chassis leakage ntawm qhov khoob, thiab cov txheej txheem hauv av zoo. Thiab qhov tsis txaus ntseeg sab nraud (xws li surge thiab xob laim tawm tsam) yuav tsum tau ua kom zoo rau kev tiv thaiv xob laim ntawm AC input thiab DC output ports. Feem ntau, rau kev sib xyaw ua ke ntawm 1.2 / 50μs qhib-circuit voltage thiab 8/20μs luv-circuit tam sim no xob laim tawm tsam waveforms, kev sib xyaw ntawm zinc oxide varistors thiab roj square electrodes, thiab lwm yam. feem ntau yog siv los daws qhov teeb meem vim lub zog me me. . Rau electrostatic paug, feem ntau nyob rau hauv qhov chaw nres nkoj kev sib txuas lus thiab kev tswj chaw nres nkoj ntawm lub me me teeb liab Circuit Court, kev siv ntawm TVS hlab thiab cov coj grounding tiv thaiv, nce hluav taws xob nyob deb ntawm lub me me teeb liab Circuit Court thiab chassis thiab thiaj li nyob rau hauv kev daws teeb meem los yog kev siv cov khoom siv tiv thaiv zoo li qub. Fast transient signals muaj ib tug dav zaus spectrum, nws yog ib qho yooj yim mus rau ntau hom txoj kev mus rau hauv lub tswj Circuit Court, siv tib txoj kev nrog anti-static thiab txo cov tis capacitance ntawm hom hom inductor, ntxiv dag zog rau hom hom teeb liab filtering. input circuit (ntxiv rau hom hom capacitance lossis insertion poob hom ferrite nplhaib, thiab lwm yam) txhawm rau txhim kho lub cev tiv thaiv kev cuam tshuam.
Txo qhov kev cuam tshuam sab hauv ntawm kev hloov hluav taws xob hloov hluav taws xob, kom ua tiav nws tus kheej electromagnetic compatibility, txhim kho kev ruaj ntseg thiab kev ntseeg siab ntawm kev hloov hluav taws xob, yuav tsum pib los ntawm cov hauv qab no:
① Ua tib zoo saib xyuas qhov raug muab faib ntawm PCB thaiv rau digital thiab modular circuits;
② Decoupling ntawm digital circuits thiab analogue Circuit Court fais fab mov;
③ cov circuits digital thiab analog circuits, ib qho taw tes hauv av, high-tam sim no circuits thiab me-tam sim no, tshwj xeeb tshaj yog tam sim no thiab voltage sampling circuits, ib qho taw tes hauv av thiaj li yuav txo tau qhov kev thab plaub, txo qhov cuam tshuam ntawm lub voj hauv av, thaiv , xyuam xim rau qhov sib nrug ntawm cov xov hlau uas nyob ib sab thiab qhov xwm txheej ntawm lub teeb liab, kom tsis txhob muaj crosstalk, txo qhov tso zis rectifier Circuit Court thiab diode Circuit Court thiab tributary lim circuits ncig los ntawm thaj tsam ntawm kev txo qis ntawm transformers, filtering capacitance ntawm inductors, thiab kev faib ntawm capacitance. Kev siv lub siab resonant zaus lim capacitors thiab lwm yam.
