Cov khoom sib nqus tuaj yeem muab faib ua ob pawg: isotropic hlau nplaum thiab anisotropic hlau nplaum:
Cov hlau nplaum Isotropic nthuav tawm cov khoom sib nqus zoo ib yam hauv txhua qhov kev qhia thiab tuaj yeem sib nqus hauv txhua qhov kev taw qhia.
Cov hlau nplaum Anisotropic nthuav tawm cov khoom sib nqus sib txawv hauv cov lus qhia sib txawv, thiab lawv muaj cov kev taw qhia nyiam rau kev ua haujlwm zoo sib nqus, hu ua kev taw qhia.
Cov hlau nplaum anisotropic muaj xws lisintered NdFeBthiabsintered SmCo, uas yog ob qho tib si cov khoom siv hlau nplaum nyuaj.
Kev taw qhia yog txheej txheem tseem ceeb hauv kev tsim cov hlau nplaum NdFeB sintered
Cov hlau nplaum ntawm cov hlau nplaum yog tsim los ntawm cov hlau nplaum sib nqus (qhov chaw sib nqus ntawm ib tus neeg sib txawv hauv ib qho kev taw qhia tshwj xeeb). Sintered NdFeB yog tsim los ntawm compressing magnetic hmoov nyob rau hauv pwm. Cov txheej txheem suav nrog muab cov hmoov sib nqus rau hauv pwm, siv cov hlau nplaum muaj zog siv lub tshuab electromagnet, thiab ib txhij siv lub zog nrog ib lub xovxwm los kho qhov yooj yim magnetization axis ntawm cov hmoov. Tom qab nias, lub cev ntsuab yog demagnetized, tshem tawm los ntawm pwm, thiab qhov tshwm sim blanks nrog zoo-oriented magnetization cov lus qhia tau txais. Cov blanks no raug txiav mus rau hauv qhov ntev los tsim cov khoom siv hlau nplaum kawg raws li cov neeg siv khoom xav tau.
Kev taw qhia hmoov yog txheej txheem tseem ceeb hauv kev tsim cov hlau nplaum ruaj khov NdFeB. Qhov zoo ntawm kev taw qhia thaum lub sijhawm ua haujlwm dawb paug yog cuam tshuam los ntawm ntau yam, suav nrog kev taw qhia thaj chaw lub zog, hmoov particle zoo thiab loj, txoj kev tsim, kev txheeb ze ntawm qhov chaw taw qhia thiab kev tsim siab, thiab xoob ntawm cov hmoov oriented.
Lub magnetic skew generated nyob rau hauv lub post-processing theem muaj ib tug tej yam kev cuam tshuam rau lub magnetic teb faib ntawm cov hlau nplaum.
Magnetization yog kauj ruam kawg los muab cov hlau nplaum rausintered NdFeB.
Tom qab txiav cov hlau nplaum blanks rau qhov xav tau qhov ntev, lawv tau ua cov txheej txheem xws li electroplating los tiv thaiv corrosion thiab dhau los ua cov hlau nplaum kawg. Txawm li cas los xij, nyob rau theem no, cov hlau nplaum tsis pom cov hlau nplaum sab nraud thiab xav tau kev sib nqus los ntawm cov txheej txheem hu ua "charging magnetism."
Cov cuab yeej siv rau kev sib nqus yog hu ua magnetizer, lossis tshuab magnetizing. Lub magnetizer thawj zaug them tus capacitor nrog siab DC voltage (piv txwv li, khw muag khoom lub zog), ces tso nws los ntawm ib tug coil (magnetizing fixture) nrog tsawg heev tsis kam. Lub ncov tam sim no ntawm cov pa tawm pulse tuaj yeem siab heev, ncav cuag kaum tawm txhiab tus amperes. Cov mem tes tam sim no ua rau muaj zog sib nqus hauv qhov sib nqus sib nqus, uas mus tas li magnetizes cov hlau nplaum tso rau hauv.
Kev huam yuaj tuaj yeem tshwm sim thaum lub sijhawm ua cov hlau nplaum, xws li tsis tiav saturation, tawg ntawm cov hlau nplaum tus ncej, thiab tawg ntawm cov hlau nplaum.
Tsis tiav saturation feem ntau yog vim tsis txaus them voltage, qhov chaw magnetic generated los ntawm lub kauj tsis ncav cuag 1.5 mus rau 2 lub sij hawm saturation magnetization ntawm cov hlau nplaum.
Rau multipole magnetization, hlau nplaum nrog thicker orientation cov lus qhia kuj nyuaj rau saturate tag nrho. Qhov no yog vim qhov kev ncua deb ntawm cov ncej sab sauv thiab qis ntawm cov hlau nplaum loj dhau, ua rau lub zog sib nqus tsis txaus los ntawm cov ncej los tsim ib qho kev sib nqus sib nqus. Yog li ntawd, cov txheej txheem magnetization tuaj yeem ua rau cov hlau nplaum tsis sib haum thiab tsis muaj zog txaus.
Kev tawg ntawm cov hlau nplaum cov ncej yog feem ntau tshwm sim los ntawm kev teeb tsa qhov hluav taws xob siab dhau lawm, tshaj qhov kev nyab xeeb voltage txwv ntawm lub tshuab magnetizing.
Cov hlau nplaum tsis muaj zog lossis cov hlau nplaum uas tau raug demagnetized ib nrab yog qhov nyuaj rau saturate vim lawv qhov pib tsis zoo ntawm cov hlau nplaum sib nqus. Yuav kom ua tiav saturation, qhov kev tawm tsam los ntawm kev hloov pauv thiab kev sib hloov ntawm cov npe no yuav tsum tau kov yeej. Txawm li cas los xij, nyob rau hauv cov ntaub ntawv uas ib tug hlau nplaum tsis yog tag nrho saturated los yog muaj residual magnetization, muaj cov cheeb tsam ntawm rov qab magnetic teb nyob rau hauv nws. Txawm hais tias magnetizing nyob rau pem hauv ntej los yog thim rov qab kev taw qhia, qee qhov chaw yuav tsum tau rov qab magnetization, yuav tsum muaj kev kov yeej ntawm lub zog quab yuam hauv cov cheeb tsam no. Yog li ntawd, ib qho chaw sib nqus muaj zog dua li qhov xav tau yog qhov tsim nyog rau kev sib nqus.
Post lub sij hawm: Aug-18-2023