Cov ntsiab lus tseem ceeb
EMI Lim:Luv luv rau Electromagnetic Interference Lim. Nws txoj haujlwm yog txhawm rau tshem tawm cov suab nrov tsis tsim nyog electromagnetic (EMI) tsim los ntawm cov khoom siv hluav taws xob, tiv thaiv nws los ntawm kev cuam tshuam nrog lwm yam khoom siv. Nyob rau tib lub sijhawm, nws tuaj yeem thaiv cov suab nrov ntawm cov khoom siv hluav taws xob sab nraud los ntawm kev nkag mus rau cov khoom siv, ua kom cov cuab yeej ua haujlwm ib txwm ua thiab ua tau raws li cov cai ntawm Electromagnetic Compatibility (EMC) cov cai.
Thick -Technology zaj duab xis:Ib txoj kev tsim khoom rau cov khoom siv hluav taws xob. Cov khoom siv hluav taws xob tshwj xeeb (xws li nyiaj, palladium-silver, kub), resistor pastes, thiab dielectric pastes yog luam tawm rau hauv cov txheej txheem insulating (feem ntau yog ceramic substrate zoo li aluminium oxide) hauv cov qauv tsim siv tshuaj ntsuam luam ntawv. Tom qab ntawd, siab -kub sintering thiab curing yog ua los tsim cov khoom uas yuav tsum tau (xws li conductors, resistors, capacitors) thiab interconnection circuits. Nws yog tus cwj pwm los ntawm cov txheej txheej zaj duab xis tuab (feem ntau ntau dua 10 microns, tuab dua li sub-micron qib ntawm nyias- zaj duab xis thev naus laus zis).
Thick -Film EMI Lim:Passive EMI filtering network integrally tsim nyob rau hauv ceramic substrate siv tuab - zaj duab xis technology. Nws koom ua ke cov khoom uas xav tau rau lub lim dej EMI (xws li hom- hom chokes, sib txawv-mode/common-mode capacitors, resistors) thiab interconnection circuits rau hauv pob zeb me me ceramic substrate los ntawm ntau- txheej tuab- zaj duab xis luam ntawv thiab sintering txheej txheem.
Qauv thiab Txoj Cai Ua Haujlwm
1. Substrate
High thermal conductivity thiab high rwb thaiv tsev ceramics (xws li Al₂O₃ aluminium oxide) feem ntau yog siv. Nws muab txhua yam kev txhawb nqa thiab hluav taws xob rwb thaiv tsev.
2. Thick - Zaj duab xis txheej
Cov Txheej Txheem Txheej Txheem: Cov khoom siv hluav taws xob tau luam tawm los ua cov kab hluav taws xob inductor (ib feem tseem ceeb ntawm -mode chokes), electrodes, kev sib txuas cov ntaub qhwv, cov txheej hauv av, thiab cov txheej tiv thaiv.
Dielectric Txheej: Dielectric muab tshuaj txhuam yog luam tawm los tsim cov txheej txheej insulating dielectric ntawm capacitors.
Resistor Layer (Yeem): Resistor muab tshuaj txhuam yog luam tawm los ua cov damping resistors, uas yog siv los txo cov resonance peaks los yog muab txoj hauv kev tawm.
3. Kev sib xyaw ua ke
Inductor/Common-Mode Choke: Pom tau los ntawm kev luam ntawv kauv lossis ntau- txheej kauv conductors ntawm lub substrate. Cov tub ntxhais yog huab cua lossis ceramic (tsis muaj cov tub ntxhais sib nqus, lossis qee zaum luam tawm ferrite muab tshuaj txhuam, txawm tias qhov no tsis tshua muaj), thiab nws feem ntau muab cov impedance siab rau ntau yam - hom suab nrov.
Capacitor: Tsim los ntawm kev luam tawm ib txheej dielectric ntawm ob txheej neeg xyuas pib. Nws suav nrog X-capacitors (nruab nrab kab) thiab Y-capacitors (nruab nrab kab thiab hauv av).
Resistor (Yeem): Tsim los ntawm kev luam ntawv ncaj qha resistor paste.
4. Ntim
Tag nrho cov tuab - zaj duab xis qauv feem ntau yog ntim (xws li molded yas, epoxy potting, los yog hlau casing) los muab kev tiv thaiv txhua yam, ib puag ncig sealing, thiab txhim kho rwb thaiv tsev kev ua tau zoo. Muaj cov pins lossis cov ntaub qhwv rau sab nraud rau qhov chaw mount technology (SMD) lossis los ntawm -lub qhov tshuab (THT) installation.
Txoj Cai Ua Haujlwm
Nws yog tib yam li EMI cov ntxaij lim dej uas tsim los ntawm cov khoom siv tsis sib xws: inductor's inductive reactance (uas cuam tshuam cov kev hloov pauv tam sim no, tshwj xeeb tshaj yog siv rau cov suab nrov nrov- hom) thiab lub capacitor's capacitive reactance (uas muab qhov qis -impedance bypass rau siab -} cov kab qis los yog tsis muaj cov lim dej tsawg network. Qhov siab dua lub suab nrov, qhov ntau dua qhov attenuation ntawm lub lim rau nws, yog li tiv thaiv siab -ntau zaus suab nrov los ntawm kev nthuav tawm raws cov kab hluav taws xob lossis cov kab teeb liab.
Daim Ntawv Thov: Siv nrog Thick -Film Power Modules
Los ntawm phau ntawv qhia ntawm JLHFH-461-3A EMI Filter tsim los ntawm ZITN, peb pom cov lus qhia siv hauv qab no: "Thaum EMI lim siv nrog DC / DC tuab-zaj duab xis converter, cov tswv yim tam sim no ntawm DC / DC converter yog cov zis tam sim no ntawm EMI lim. Cov tswv yim hloov pauv tam sim no ntawm qhov siab tshaj plaws yog DC / DC. input tam sim no ntawm DC / DC converter ntawm qhov qis kawg ntawm qhov input voltage yuav tsum raug xam, thiab lub zog derating tsim npoo yuav tsum raug txiav txim siab tsim nyog tsim cov zis tam sim no ntawm EMI lim.
Nws tuaj yeem pom tau tias kev siv cov khoom siv hluav taws xob tuab nrog EMI cov ntxaij lim dej yog qhov kev xaiv xaiv los ntawm lub cev ntawm kev hloov cov khoom siv hluav taws xob, qhov yuav tsum muaj kev txwv ntawm EMC cov cai, thiab cov kev xav tau rau kev ntseeg siab ntawm lub cev.