Yog vim li cas Teem caij los cuam tshuam Sib nqus nplhaib

Vim li cas thiaj tsim teeb meem tiv thaiv nplhaib?

Lub ntsiab ntawm pawg thawjcoj, CPU, fais fab mov thiab IDE cov ntaub ntawv hauv lub txee rau txhua tus ua haujlwm ntawm kev ua haujlwm siab heev, yog li muaj ntau qhov chaw tawm ntawm EMI tshaj hauv lub txee, thiab qhov teeb liab siv tau ntau ntau rau ntau zaus uas sab nraum lub txee! Kev nqus nplhaib magnetic, hu ua ferrite magnetic nplhaib, feem ntau yog siv nyob rau hauv detachable separating magnetic nplhaib. Nws yog ib qho kev cuam tshuam txog kev cuam tshuam cov khoom hluav taws xob hauv hluav taws xob. Nws muaj ib tug zoo hluav taws rau suab nrov nrov heev. Nws yog feem ntau ua los ntawm cov khoom siv ferrite (Mn-Zn). Sib nqus rings muaj ntau yam txawv txav ntawm cov sib nrig sib txawv. Feem ntau, tus impedance yog me me ntawm tsawg frequencies. Thaum lub teeb liab nce ntxiv, lub impedance ntawm sib nqus rings nce tag. Nws ua rau qhov zoo thiab tseem ceeb cov teeb meem kis tau zoo, thiab muaj peev xwm suppress lub tso cai ntawm qhov siab cuam tshuam cov lag luam zoo, thiab tus nqi yog tsawg.

Ferrite yog ferromagnetic khoom nrog cubic lattice qauv. Ferrite khoom yog ferro-magnesium alloy lossis ferro-nickel alloy. Nws cov txheej txheem kev tsim thiab cov khoom siv dag zog yog zoo li cov neeg ntawm ceramics, thiab nws cov xim yog grey-dub. Ferrite yog ib hom ntawm cov tub ntxhais kawm uas siv hauv cov ntxaij lim dej EMI. Ntau lub tuam txhab muab cov khoom ferrite tshwj xeeb rau EMI hluav. Cov khoom siv no yog qhov ua los ntawm kev siab tsis zoo thiab kev pom zoo. Nws tuaj yeem tsim qhov tsawg tshaj plaws ntawm kev ua haujlwm ntawm kev sib tsuam ntawm cov cua ntawm inductors nyob rau hauv high zaus thiab siab tiv thaiv. Rau ferrite siv los suppress electromagnetic cuam tshuam, qhov tseem ceeb tshaj plaws kev kawm tsis yog permeability thiab saturated flux density Bs. Permeability mu muaj peev xwm hais tau ua cov zauv cim, tiag tiag tus naj npawb muab qhov teeb meem, kev xav hauv nruab nrab qhov kev poob qis, thiab nce nrog kev nce zaus. Yog li no, nws qhov sib npaug sib npaug yog ib txoj kab sib tsoo uas muaj cov kab inductance L thiab ua R, ob qho tib si uas yog kev khiav dej num ntau zaus. Thaum tus neeg xyuas pib dhau los ntawm cov tub ntxhais ferrite, qhov inductance impedance nce nrog rau qhov nce ntawm zaus, tab sis lub mechanism yog txawv kiag li ntawm frequencies.

Txawv ferrite khawm cov ntsiab lus muaj ntau txoj kev txwv khi ntau yam. Feem ntau yog qhov ntau dua qhov permeability, txo cov hluav taws ntau zaus. Tsis tas li ntawd, qhov loj qhov ntim ntawm ferrite, qhov zoo dua qhov inhibition zoo. Thaum twg lub ntim tsau, qhov ua rau tsis zoo ntawm qhov ntev thiab nyias hom yog qhov zoo tshaj qhov uas luv luv thiab tuab duab, thiab me me ntawm lub cev, qhov zoo dua qhov kev cuam tshuam zoo. Txawm li cas los xij, yog tias DC lossis AC txhob txwm tuag, tseem muaj qhov teeb meem ntawm kev ua ferrite. Qhov loj dua ntu tshooj ntawm tus cwj pwm, qhov tsawg dua qhov uas nws yog, qhov ntau dua li kev txaus siab rau tam sim no.

Thaum EMI absorbs lub magnetic nplhaib / hlaws mus rau suppress hom txawv hom, nws cov nqi tam sim no yog proportional to nws lub ntim, qhov kev ua rau ob qho kev ua rau kev ua kom poob thiab txo cov kev ua tau zoo ntawm cov khoom; Thaum cov hom kev cuam tshuam zoo li ob sab (zoo thiab tsis zoo) ntawm lub hwj huam mov dhau ntawm lub nplhaib ntawm tib lub sij hawm, qhov teeb liab zoo tshaj yog qhov sib txawv ntawm lub teeb liab, thiab EMI absorbs lub nplhaib ntawm lub nplhaib / hlaws tsis zoo rau nws . Rau cov hom kev hloov hom, qhov inductance loj dua. Ib txoj hauv kev zoo ntawm kev sib nqus sib nqus yog ua kom cov xov hlau sib kis tau los ntawm cov nqhuab ntawm cov nplhaib sib tw ob peb lub sij hawm los mus ua rau kom muaj qhov inductance. Raws li nws txoj cai hauv hluav taws xob ntawm electromagnetic cuam tshuam, nws tuaj yeem raug siv los tswj cov kev cuam tshuam electromagnetic cuam tshuam.

Ferrite suppression ntsiab yuav tsum tau nyob ze ntawm lub hauv paus ntawm kev cuam tshuam. Rau qhov tawm tswv yim / tawm ntawm Circuit Court, nws yuav tsum nyob ze li qhov ua tau kom nkag mus rau hauv qhov hluav taws xob thiab qhov hluav taws xob ntawm cov ntaub thaiv shielding. Rau lub lim dej ntawm cov xim fibrite magnetic rings thiab cov hlaws dai, dua li cov khoom pov thawj cov ntaub ntawv siab, cov xim yuav tsum tau them rau nws daim ntawv thov caij nyoog. Lawv tsis kam mus rau qhov khoom loj hauv thaj tsam ntawm lub voj voog yog li ntawm 10 rau ob peb hundred_, yog li ntawd lawv lub luag hauj lwm hauv kev sib tw impedance circuits tsis pom tseeb, ntawm qhov tsis sib xws, lawv yuav zoo heev hauv cov huab cua tsawg tsawg (xws li fais fab kev lag luam, fais fab mov lossis xov tooj cua zaus circuits).

Lub pob zeb kub-pob zeb kuj tseem tuaj yeem kho cov khoom raws li cov neeg yuav tsum tau ua.

Tsis tas li ntawd peb tuaj yeem ua EE / EI / EF / ER / EFD / EFT / EP / EPC / POT / PQ / RM / SMD / POT Hom High Transformer

Yog tias koj muaj kev txaus siab rau peb cov khoom, thov hu rau peb:

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