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Nangona imowudi yokukrwitshwa ixhaphakile, enye indlela inokuba sisihluzo se-EMI se-monolithic.Xa sibekwe kakuhle, ezi zixhobo ze-ceramic ze-multilayer zibonelela ngokugqwesileyo kwimowudi eqhelekileyo yokuchasa ingxolo.
Izinto ezininzi zongeza uphazamiseko “lwengxolo” olunokonakalisa okanye luphazamise ukusebenza kwezixhobo zombane. Iimoto zanamhlanje ngumzekelo obalaseleyo. sisiqalo nje eso.Ukulawula oku kuphazamiseka kwengxolo, ishishini lidla ngokusebenzisa izihluzi zokukhusela kunye ne-EMI ukuphelisa i-noise.Kodwa ezinye izisombululo zemveli zokuphelisa i-EMI/RFI azisekho ngokwaneleyo.
Le ngxaki ikhokelela ii-OEM ezininzi ukuba ziphephe ukusebenzisa i-2-capacitor differential, i-3-capacitor (i-X capacitor enye kunye ne-2 Y capacitors), izihluzi ze-feedthrough, i-cokes yendlela eqhelekileyo, okanye indibaniselwano yezi isisombululo esifanelekileyo njenge-monolithic EMI filter kunye ngcono ukwala ingxolo kwiphakheji encinci.
Xa isixhobo sombane sifumana amaza ombane anamandla, imisinga engafunekiyo inokutsalwa kwisekethe kwaye ibangele ukusebenza obekungalindelekanga-okanye iphazamise ukusebenza okucetywayo.
I-EMI/RFI inokuba ngokohlobo oluqhutywayo okanye olukhutshwa ngemitha.Xa kuqhutywa i-EMI, oko kuthetha ukuba ingxolo ihamba ngee-conductor zombane.I-EMI ekhutshwayo ye-Radiated yenzeka xa ingxolo ihamba emoyeni ikwimo yemagnethi okanye amaza onomathotholo.
Nokuba amandla asetyenziswa ngaphandle mancinci, ukuba axuba kunye namaza erediyo asetyenziselwa ukusasaza kunye nokunxibelelana, anokubangela ukulahleka kokwamkela, ingxolo engaqhelekanga kwisandi, okanye ukuphazamiseka kwevidiyo.Ukuba amandla anamandla kakhulu, anokwenza ukonakalisa izixhobo zombane.
Imithombo ibandakanya ingxolo yendalo (umzekelo, ukukhutshwa kwe-electrostatic, ukukhanya, kunye neminye imithombo) kunye nengxolo eyenziwe ngumntu (umzekelo, ingxolo yoqhagamshelwano, izixhobo ezivuzayo zisebenzisa amaza aphezulu, ukukhutshwa okungafunwayo, njl. njl.). Ngokuqhelekileyo, ingxolo ye-EMI/RFI yingxolo yemo yesiqhelo , ngoko ke isisombululo kukusebenzisa i-EMI filter ukususa iifrikhwensi eziphezulu ezingafunekiyo, njengesixhobo esahlukileyo okanye efakwe kwibhodi yesekethe.
Izihluzi ze-EMI Izihluzo ze-EMI zibandakanya amacandelo angasetyenziswayo, afana neecapacitors kunye nee-inductors, eziqhagamshelwe ukwenza isekethe.
“Ii-inductors ivumela i-DC okanye i-low-frequency current ukuba idlule ngelixa ivala imisinga engafunekiyo, engafunwayo ye-high-frequency currents. IiCapacitors zibonelela ngendlela ephantsi yokuthintela ingxolo ephezulu-frequency ukusuka kwigalelo lesihluzi kumandla okanye uxhulumaniso lomhlaba, "Uvelisa i-Multilayer Ceramic uthe uChristophe Cambrelin wenkampani ye-capacitor uJohanson Dielectrics.EMI filter.
Iindlela zokucoca eziqhelekileyo eziqhelekileyo zibandakanya izihluzi ezisezantsi ezidlulayo zisebenzisa i-capacitors ezigqithisa izibonakaliso kunye neefrikhwensi ezingaphantsi kwe-frequency cutoff frequency kunye nokunciphisa imiqondiso kunye ne-frequencies ngaphezu kwe-cutoff frequency.
Isiqalo esiqhelekileyo kukusebenzisa iperi ye-capacitor kwi-configuration yokwahluka, kunye ne-capacitor enye phakathi komkhondo ngamnye wegalelo lokwahlukana kunye nomhlaba. ukuthumela imiqondiso yezigaba ezichaseneyo phezu kweengcingo ezimbini, i-signal-to-noise ratio iphuculwe ngelixa ingxolo engafunekiyo ithunyelwa emhlabeni.
"Ngelishwa, ixabiso le-capacitance ye-MLCCs kunye ne-X7R dielectrics (eqhelekileyo isetyenziselwa lo msebenzi) inokuhluka kakhulu ngexesha, i-voltage ye-bias kunye nokushisa," kusho uCambrelin.
Ke nangona ii-capacitors ezimbini zihambelana ngokusondeleyo ngexesha elinikiweyo kwiqondo lobushushu begumbi kumbane ophantsi, zinokuphela zinexabiso elahluke kakhulu kanye ngexesha, i-voltage okanye utshintsho lobushushu. Oku kungahambelani phakathi kweengcingo ezimbini Ukutshatisa kuya kubangela iimpendulo ezingalinganiyo kufuphi nesihluzo esisikiweyo. Ke ngoko, iguqula ingxolo yendlela eqhelekileyo ibe yingxolo eyahlukileyo. ”
Esinye isisombululo kukudibanisa ixabiso elikhulu "X" capacitor phakathi kwee-capacitors "Y" ezimbini. "X" i-capacitive shunt inikeza i-balance balance mode eqhelekileyo, kodwa ibuye ibe nefuthe elingathandekiyo lokuhluza uphawu lokwahlukana.Mhlawumbi isisombululo esiqhelekileyo kwaye enye indlela kwisihluzo sokudlula esisezantsi yindlela eqhelekileyo yokuminxeka.
Imowudi eqhelekileyo ikrwitsha yi-1: 1 i-transformer kunye ne-windings yomibini esebenza njengeprayimari kunye neyesibini.Kule ndlela, i-current ngokusebenzisa i-winging enye ibangela umbane ochasayo kwenye i-winging. ukusilela okubangelwa kukungcangcazela.
Nangona kunjalo, imowudi efanelekileyo eqhelekileyo ikrwitsha kunye nokudibanisa okugqibeleleyo kunye nokudibanisa phakathi kwee-windings ezicacileyo kwiimpawu zokwahlula kwaye ine-impedance ephezulu kwimowudi yengxolo eqhelekileyo.Enye into engalunganga yeendlela eziqhelekileyo zokuxutywa nguluhlu lwamafrikhwensi olulinganiselweyo ngenxa ye-parasitic capacitance.Ngokwemathiriyeli engundoqo enikiweyo. , i-inductance ephezulu esetyenziselwa ukufumana ukuhluzwa okuphantsi kweefrikhwensi, ukujika okungaphezulu kuyafuneka, ngaloo ndlela kubangele i-parasitic capacitances engakwazi ukudlula ukuhluzwa kwamaxesha amaninzi.
Ukungahambelani phakathi kwama-windings ngenxa yokunyamezelana kokwenziwa komatshini kubangela ukutshintshwa kwemowudi, apho inxalenye yamandla omqondiso iguqulwa ibe yingxolo yemowudi eqhelekileyo kunye ne-vice versa.Le meko ingabangela ukuhambelana kwe-electromagnetic kunye ne-immunity issues.Ukungahambi kakuhle kunciphisa i-inductance esebenzayo yomlenze ngamnye.
Kungakhathaliseki, ukuminxeka kwemowudi eqhelekileyo kuneengenelo ezibalulekileyo ngaphezu kwezinye iinketho xa umqondiso wokwahlula (udlula) usebenza kuluhlu lwamaza okuphindaphinda okufanayo njengengxolo yemowudi eqhelekileyo ekufuneka yaliwe. Ukusebenzisa imowudi eqhelekileyo ukuminxa, uphawu lokugqitha lunokwandiswa ukuya imowudi eqhelekileyo ukwala band.
Izihluzo ze-EMI ze-Monolithic Nangona i-moolithic i-cokes ixhaphakile, izihluzo ze-EMI ze-monolithic nazo zingasetyenziswa.Xa zibekwe ngokufanelekileyo, ezi zixhobo ze-ceramic ze-multilayer zibonelela ngokugqwesa ukulahlwa kwengxolo yemo yesiqhelo. .Ezi zihluzi zisebenzisa iindlela zombane ezimbini ezahlukeneyo ngaphakathi kwesixhobo esinye esiqhagamshelwe kuqhagamshelo olune lwangaphandle.
Ukuze ugweme ukudideka, kufuneka kuqatshelwe ukuba izihlungi ze-EMI ze-monolithic azikho i-feedthrough capacitors.Nangona zibukeka zifana (ukupakishwa okufanayo kunye nenkangeleko), zihluke kakhulu kuyilo, kwaye azixhunyiwe ngendlela efanayo.Njengezinye i-EMI. Izihluzi, izihluzi ze-EMI ze-monolithic zithomalalisa onke amandla ngaphezulu kwe-frequency cutoff frequency kwaye ukhethe ukudlulisa kuphela amandla ophawu olufunekayo, ngelixa uphambukisa ingxolo engafunekiyo "kumhlaba".
Nangona kunjalo, isitshixo siphantsi kakhulu i-inductance kunye ne-impedance ehambelanayo.Izihlungi ze-EMI ze-monolithic, ii-terminals zixhunywe ngaphakathi kwireferensi eqhelekileyo (ikhaka) i-electrode ngaphakathi kwesixhobo, kwaye iiplate zihlukaniswe yi-electrode reference.Electrostatically, ii-nodes ezintathu zombane zenziwe ngama-halves amabini e-capacitive abelana nge-electrode yereferensi eqhelekileyo, zonke eziqulethwe kumzimba omnye we-ceramic.
Ibhalansi phakathi kweziqingatha ezibini ze-capacitor ikwathetha ukuba iziphumo ze-piezoelectric ziyalingana kwaye zichasene, zirhoxisa enye kwenye.Obu budlelwane bukwachaphazela ubushushu kunye nokutshintsha kombane, ngoko ke amacandelo kuzo zombini imigca yobudala ngokulinganayo. Izihluzi, kukuba aziyi kusebenza ukuba ingxolo yemowudi eqhelekileyo ikwisantya esifanayo nesahlukileyo somqondiso.” Kule meko, ukukrwitshwa kwendlela eqhelekileyo sisisombululo esingcono,” utshilo uCambrelin.
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Elona qonga liphezulu le-EE lokusombulula iingxaki kwihlabathi eligubungela ii-microcontrollers, i-DSP, uthungelwano, i-analog kunye noyilo lwedijithali, iRF, izixhobo zombane zamandla, umzila wePCB, nokunye.
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