1. Dab tsi yog qhov kev ntsuam xyuas hluav taws xob tiv thaiv kab mob?
Lub hom phiaj ntawm kev ntsuas hluav taws xob tiv thaiv hluav taws xob yog tsim kom muaj ib qho kev ntsuas zoo rau kev ntsuas kev ua haujlwm ntawm cov khoom siv hluav taws xob thiab hluav taws xob thaum raug kev kub ntxhov (kev cuam tshuam). Cov txheej txheem thoob ntiaj teb rau kev ntsuas kev tiv thaiv kab mob yog IEC / EN 61000-4-5: Electromagnetic Compatibility (EMC) kev sim thiab ntsuas cov txheej txheem - surge immunity test. Tus qauv piav qhia txog ob qhov sib txawv waveform generators, ib qho yog ua ke yoj generator (1.2/50μs voltage waveform, 8/20μs tam sim no waveform), uas yog rau kev kuaj fais fab chaw nres nkoj. Lwm hom yog lub tshuab hluav taws xob ua ke ua ke uas ua tau raws li cov cai ntawm International Telecommunication Union Commission (10/700μs voltage waveform, 5/320μs tam sim no waveform), uas yog rau cov teeb liab / kev sib txuas lus cov chaw nres nkoj kuaj.
Txhawm rau simulate surge pulses tshwm sim los ntawm xob laim tawg lossis hloov pauv hloov pauv tau tshwm sim los ntawm kev hloov pauv kev cuam tshuam thiab kev ua haujlwm tsis raug thiab ntsuas kev ua haujlwm ntawm cov cuab yeej raug xob laim, IEC / EN 61000-4-5 tus qauv xav kom cov cuab yeej kuaj (EUT) yuav tsum tsim ua ke waveform (1.2/50μs qhib-circuit voltage waveform, 8/20μs luv luv-circuit tam sim no waveform) raws li qhov teev nyob (DC los yog AC fais fab mov) ua hauj lwm lub xeev.
EMCSOSIN SUR series surge generator tuaj yeem tsim cov qauv no.
2. Dab tsi yog coupling/decoupling network (CDN) nyob rau hauv kev ntsuam xyuas hluav taws xob tiv thaiv kab mob?
Lub luag haujlwm ntawm kev sib txuas network yog xa cov teeb liab surge ntawm kev sib xyaw ua ke nthwv dej generator (xov tooj cua surge generator) rau EUT, txwv tsis pub cov dej ntws tam sim no los ntawm cov kab hluav taws xob mus rau hauv lub tshuab hluav taws xob sib xyaw ua ke kom ua rau muaj kev puas tsuaj rau lub tshuab hluav taws xob, thiab txo qhov cuam tshuam. ntawm surge waveform. Lub luag haujlwm ntawm lub network decoupling yog los muab cov kev cuam tshuam txaus txaus rau lub surge nthwv dej kom tsis txhob muaj qhov surge nkag mus rau hauv daim phiaj thiab ua rau muaj kev cuam tshuam rau cov khoom siv tsis raug kuaj los ntawm tib lub zog. Tsis tas li ntawd, lwm yam khoom siv txuas nrog tib lub zog hluav taws xob tuaj yeem muaj cov cuab yeej tiv thaiv hluav taws xob. Yog tias tsis siv cov kev sib txuas sib txuas, cov cuab yeej tiv thaiv xob laim ntawm cov khoom siv tsis siv tshuaj ntsuam xyuas yuav tiv thaiv kev thov ntawm kev nce siab ntawm EUT thiab cuam tshuam rau cov txiaj ntsig ntawm kev ntsuas surge.
EMCSOSIN surge generator muaj nyob rau hauv / sab nraud ib theem lossis peb theem txuas txuas txuas txuas (CDN), nrog rau kev hloov kho tam sim no raws li cov neeg siv khoom xav tau.
3. Coupling/decoupling network (CDN) tsim qauv thiab Circuit Court tsis
1) Kev sib txuas network
Cov kev sib txuas dav dav rau kev tshaj tawm cov cim rau EUT suav nrog kev sib txuas capacitive thiab cov pa roj tawm lub raj txuas. Lub tom kawg muaj kev cuam tshuam rau cov zis waveform ntawm kev sib xyaw ua ke nthwv dej generator, yog li qhov qub yog ntau dua. Yog hais tias ib tug me me coupling capacitance tus nqi raug xaiv, lub residual surge voltage ntawm lub hwj chim mov sab yog qis dua, tab sis cov efficiency ntawm generating surge tam sim no yog qis dua. Yog tias tus nqi sib txuas loj capacitance raug xaiv, qhov kev sib txuas ua haujlwm rau EUT yog siab dua, tab sis qhov seem voltage yog siab dua. Txhawm rau sib npaug cov khoom siv hluav taws xob thiab cov teeb meem seem seem, lub teb chaws tus qauv qhia tias kab-rau-kab sib txuas (hom sib txawv) txais 18μF capacitance, kab-rau-hauv av coupling (hom hom) siv 9μF capacitance. Lub hauv paus impedance ntawm cov hluav taws xob qis hluav taws xob rau hauv av yog 12Ω. Rau lub tshuab hluav taws xob sib xyaw ua ke nrog lub tshuab hluav taws xob virtual (txhais tau tias yog qhov piv ntawm lub ncov qhib hluav taws xob hluav taws xob rau lub ncov luv luv tam sim no) ntawm 2 Ω, ib qho ntxiv 10Ω resistor yuav tsum tau txuas rau hauv series thaum kab-rau-hauv av sib txuas kom nce. qhov zoo impedance.
2) Decoupling network
Lub decoupling network feem ntau muaj LC low-pass lim uas yog tsim los ntawm decoupling inductor "L" thiab decoupling capacitor "C". Qhov sib npaug ntawm daim duab kos duab ntawm kab-rau-hauv av thiab kab-rau-kab kev sib txuas, qhov twg Rs thiab R's yog lub hauv paus impedances ntawm lub zog hluav taws xob. Rs =12 Ω nyob rau hauv kab-rau-hauv av rooj plaub, thiab qhov hluav taws xob hloov hluav taws xob ntawm R' Circuit Court nyob rau hauv kab-rau-kab rooj plaub yog s{10}} Ω feem.
4. Cov yam ntxwv ntawm CDN
IEC/EN {{0}} tus qauv qhia cov yam ntxwv ntawm CDN, uas yuav tsum tau ntsuas nyob rau hauv qhib-circuit tej yam kev mob (load ntau dua los yog sib npaug rau 10 kΩ) thiab nyob rau hauv luv luv-circuit tej yam kev mob (tsawg dua 0, 1 Ω) ntawm tib lub teeb voltage.
Qhov seem surge voltage ntsuas nruab nrab ntawm cov kab surged thiab hauv av ntawm qhov chaw nres nkoj ac / dc fais fab ntawm lub decoupling network nrog EUT thiab cov khoom siv loj tsis txuas yuav tsum tsis pub tshaj 15% ntawm qhov siab tshaj plaws siv qhov ntsuas hluav taws xob lossis ob zaug ntawm qhov ntsuas siab siab ntawm CDN, qhov twg yog siab dua.
Qhov tsis xav tau surge voltage ntsuas ntawm cov kab tsis-surged thiab hauv av nrog EUT thiab cov khoom siv tseem ceeb tsis txuas nrog yuav tsum tsis pub tshaj 15% ntawm qhov siab tshaj plaws siv qhov ntsuas hluav taws xob (qhib-circuit).
Yog xav paub ntxiv ntawm EMCSOSIN surge generator, thov tsis txhob yig tiv tauj peb txhua lub sijhawm. Ua tsaug!
