Ferrite nplhaib - yog dab tsi? Yuav ua li cas ua ib lub nplhaib ferrite nrog koj tus kheej txhais tes?

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2024-01-02 13:55

Peb txhua tus tau pom cov thooj voos kheej kheej me ntawm cov hlua hluav taws xob lossis cov kab hluav taws xob rau cov khoom siv hluav taws xob sib xws. Lawv tuaj yeem pom ntawm cov tshuab computer feem ntau, ob qho tib si hauv chaw ua haujlwm thiab hauv tsev, ntawm qhov kawg ntawm cov xov hlau uas txuas cov kab ke system mus rau cov keyboard, nas, saib, tshuab luam ntawv, scanner, thiab lwm yam. Cov khoom no hu ua " ferrite nplhaib" (los yog lim ferrite). Hauv tsab xov xwm no, peb yuav saib lub hom phiaj uas cov tuam txhab lag luam ntawm lub khoos phis tawj thiab cov cuab yeej siv hluav taws xob siab muab lawv cov khoom siv cable nrog cov ntsiab lus hais.

Lub hom phiaj tseem ceeb

Lub nplhaib ferrite tuaj yeem txo qhov cuam tshuam ntawm xov tooj cua zaus thiab electromagnetic cuam tshuam ntawm lub teeb liab uas kis tau los ntawm cov hlau. Cov teeb liab ntev thiab lub zog hluav taws xob ntawm ob lub computer thiab lwm yam khoom siv hluav taws xob muaj cov kab mob cab,uas yog, lawv ua raws li antennas. Lawv muaj txiaj ntsig zoo tshaj tawm ntau lub suab nrov uas tau tsim hauv lub cuab yeej mus rau ib puag ncig sab nraud, yog li tsim kev cuam tshuam hauv xov tooj cua thaum tau txais xov tooj cua thiab lwm yam khoom siv hluav taws xob. Thiab rov qab, thaum tau txais kev cuam tshuam los ntawm huab cua los ntawm xov tooj cua xa xov tooj cua, lub computer lossis lwm yam khoom siv hluav taws xob yuav ua haujlwm tsis zoo. Ntawm no, txhawm rau tshem tawm qhov tshwm sim no, lawv siv lub nplhaib ferrite hnav ntawm lub hwj chim lossis kev sib txuas.

Lub cev muaj zog

Ferrite yog ferrimagnet uas tsis muaj hluav taws xob, uas yog, qhov tseeb nws yog cov hlau nplaum sib nqus. Eddy tam sim no tsis tsim nyob rau hauv cov khoom no, thiab yog li ntawd nws remagnetizes sai heev - nyob rau hauv lub sij hawm nrog zaus ntawm sab nraud electromagnetic teb. Cov khoom vaj khoom tsev no yog lub hauv paus rau kev tiv thaiv zoo ntawm cov khoom siv hluav taws xob. Lub nplhaib ferrite hnav ntawm lub cable muaj peev xwm tsim tau lub zog loj impedance rau hom tam sim no.

Cov khoom no yog tsim los ntawm kev sib xyaw tshuaj ntawm cov hlau oxides nrog oxides ntawm lwm cov hlau. Nws muaj cov yam ntxwv sib nqus tshwj xeeb thiab tsis tshua muaj hluav taws xob conductivity. Vim li no, ferrites tau xyaum tsis muaj kev sib tw ntawm lwm cov khoom sib nqus hauv cov cuab yeej siv siab. Ferrite rings 2000nm nce qhov inductance ntawm lub cable (ntau pua lossis txhiab zaus), uas ua kom muaj kev cuam tshuam ntawm kev cuam tshuam ntau zaus. Cov khoom no tau nruab rau ntawm txoj hlua thaum nws tsim khoom lossis, txiav rau hauv ob lub voj voog, muab tso rau ntawm cov hlau tam sim ntawd tom qab nws tsim khoom. ferriteCov lim tau ntim rau hauv cov ntaub ntawv yas. Yog tias koj txiav nws qhib, koj tuaj yeem pom ib daim hlau sab hauv.

Kuv puas xav tau cov lim ferrite? Los yog qhov no yog lwm qhov dag?

Computers yog cov "tso nrov" (electromagnetically) cov khoom siv. Yog li, lub motherboard nyob rau hauv lub system unit muaj peev xwm oscillate ntawm ib zaus ntawm ib kilohertz. Cov keyboard muaj lub microchip, uas tseem ua haujlwm ntawm lub siab zaus. Tag nrho cov no ua rau lub npe hu ua xov tooj cua nrov nrov nyob ze ntawm lub system. Feem ntau, lawv raug tshem tawm los ntawm kev thaiv lub rooj tsavxwm los ntawm electromagnetic teb nrog cov ntaub ntawv hlau. Txawm li cas los xij, lwm qhov ntawm lub suab nrov yog cov xov tooj tooj liab uas txuas ntau yam khoom siv. Qhov tseeb, lawv ua zoo li cov kav hlau txais xov ntev uas khaws cov teeb liab los ntawm cov xov tooj cua ntawm lwm cov khoom siv hauv xov tooj cua thiab TV, thiab cuam tshuam rau kev ua haujlwm ntawm "lawv" ntaus ntawv. Lub ferrite lim tshem tawm cov suab nrov electromagnetic thiab tshaj tawm xov xwm. Cov ntsiab lus no hloov electromagnetic high-frequency vibrations rau hauv thermal zog. Tias yog vim li cas lawv tau nruab rau ntawm qhov kawg ntawm feem ntau cov cables.

Yuav ua li cas xaiv cov lim ferrite zoo

Txhim kho lub nplhaib ferrite ntawm lub cable nrog koj tus kheej txhais tes, koj yuav tsum nkag siab txog hom khoom no. Tom qab tag nrho, nws nyob ntawm hom hlau thiab nws cov tuab uas lim (los ntawm cov khoom siv dab tsi) koj yuav tsum siv. Piv txwv li, ib lub nplhaib ntsia rau ntawm ib tug multicore cable (lub hwj chim qaum, cov ntaub ntawv cable, video los yog USB interface) tsim ib tug thiaj li hu ua hom-hom transformer nyob rau hauv seem no, dhau.anti-phase signals nqa cov ntaub ntawv tseem ceeb, thiab tseem qhia txog kev cuam tshuam ntau hom. Nyob rau hauv cov ntaub ntawv no, tsis absorbing ferrite yuav tsum tau siv kom tsis txhob cuam tshuam cov ntaub ntawv kis tau tus mob, tab sis ib tug ntau zaus ferromaterial. Tab sis nws yog qhov zoo dua los xaiv ferrite rings rau cov kav hlau txais xov cable los ntawm cov khoom siv uas yuav cuam tshuam cov kev cuam tshuam ntau zaus, es tsis txhob cuam tshuam lawv rov qab rau hauv cov hlau. Raws li koj tuaj yeem pom, cov khoom tsis raug tuaj yeem ua rau qhov ua tau zoo ntawm koj lub cuab yeej.

Ferrite cores

Thick ferrite thooj voos kheej kheej yog qhov ua tau zoo tshaj plaws ntawm kev cuam tshuam. Txawm li cas los xij, nws yuav tsum nco ntsoov tias cov ntxaij lim dej uas loj heev yog qhov tsis yooj yim rau siv, thiab cov txiaj ntsig ntawm lawv txoj haujlwm hauv kev xyaum yuav tsis txawv ntau ntawm cov me me. Cov lim yuav tsum yog qhov loj me: qhov zoo tshaj plaws hauv txoj kab uas hla yuav tsum phim cov hlau thiab qhov dav yuav tsum phim qhov dav ntawm cable txuas.

Tsis tas li, tsis txhob hnov qab tias tsis yog cov lim dej ferrite nkaus xwb pab tawm suab nrov. Piv txwv li, kom zoo dua conductivity, nws yog pom zoo kom siv cables nrog ib tug loj cross seem. Thaum xaiv qhov ntev ntawm txoj hlua, koj yuav tsum tsis txhob ua qhov loj ntawm qhov ntev ntawm cov khoom sib txuas. Tsis tas li ntawd, qhov tsis zoo ntawm kev sib txuas ntawm cov hlau thiab cov khoom sib txuas kuj tuaj yeem ua qhov cuam tshuam.

Hom ntau tshaj plaws ntawm ferrite nplhaib cim cim yog raws li hauv qab no: K D × d × N, qhov twg:

- K luv rau "ntiv nplhaib";

- D - sab nraud ntawm cov khoom;

- d - puab kab ntawm lub nplhaib ferrite;

- H – lim qhov siab.

Ntxiv rau qhov tag nrho qhov ntev ntawm cov khoom, hom ferromagnetic khoom yog encrypted nyob rau hauv lub cim. Ib qho piv txwv ntawm kev nkag yuav zoo li no: M20VN-1 K 4x2, 5x1, 6. Qhov thib ob ib nrab sib haum mus rau tag nrho qhov ntev ntawm lub nplhaib, thiab thawj zaug sib nqus permeability yog encrypted nyob rau hauv thawj (20 Μ _{i). Ntxiv nrog rau cov kev txwv no, nyob rau hauv cov lus piav qhia, txhua lub chaw tsim khoom qhia qhov tseem ceeb zaus, hysteresis voj tsis, resistivity thiab Curie kub rau ib yam khoom.}

Yuav ua li cas lwm tus ferrite rings siv

Dhau li ntawm daim ntawv thov paub zoo tias muaj kev tiv thaiv ntau zaus, cov ntaub ntawv ferromagnetic yog siv los ua cov khoom siv hluav taws xob. Lawv feem ntau pom hauv cov khoom siv hluav taws xob hauv computer. Nws yog qhov paub zoo tias ferrite nplhaib transformer zoo heev hauv cov khoom sib npaug. Txawm li cas los xij, tsis yog txhua tus paub tias muaj qhov ua tau ntawm "stretching" ntsuas. Qhov kev hloov kho ntawm lub transformer no muaj peev xwm ua tau qhov kev ntsuas kev ua haujlwm kom raug. Tsis tas li ntawd, transformers ntawm ferrite rings yog dav siv los ua kom haum cov zis thiab input resistances ntawm cascades ntawm transistor li. Hauv qhov no, active thiab reactive resistances yog hloov. Ua tsaug rau qhov tom kawg, cov cuab yeej no tuaj yeem siv los hloov pauv qhov ntsuas qhov ntsuas qhov ntsuas. Rub-down transformers ua haujlwm zoo hauv qab 10 MHz.

Zaj lus

Rau cov uasYog hais tias koj xav nyob rau hauv yuav ua li cas cua lub nplhaib ferrite koj tus kheej, nws yuav tsum tau borne nyob rau hauv lub siab hais tias lub series impedance qhia los ntawm ib tug high-frequency ferrite core tuaj yeem yooj yim nce los ntawm kev ua ob peb lem ntawm tus neeg xyuas pib ntawm nws. Raws li hluav taws xob engineering txoj kev xav qhia, lub impedance ntawm xws li ib tug system yuav nce nrog lub square ntawm cov lem. Tab sis qhov no yog nyob rau hauv txoj kev xav, tab sis nyob rau hauv kev xyaum daim duab yog txawv me ntsis vim lub nonlinearity ntawm ferromagnetic cov ntaub ntawv thiab poob nyob rau hauv lawv.

Ib khub ntawm qhov hloov pauv ntawm cov tub ntxhais nce qhov impedance tsis yog plaub zaug raws li nws yuav tsum yog, tab sis tsawg dua. Yog li ntawd, nyob rau hauv kev txiav txim rau ob peb lem kom haum nyob rau hauv ib tug cable lim, lub nplhaib ntawm ib tug obviously loj loj yuav tsum tau xaiv. Yog tias qhov no tsis tsim nyog, thiab cov hlau yuav tsum nyob twj ywm ntev, nws yog qhov zoo dua los siv ob peb lub lim dej.