Kev ua yeeb yam ntawm cov khoom ntiag tug ntawm cov khoom ntiag tug thiab cov tshuab hluav taws xob txuas mus tas li
1. Kev ua tau zoo ntawm cov khoom ntiag tug uas niaj hnub siv rau cov tshuab hluav taws xob
1.1 Cov ntaub ntawv uas niaj hnub siv los qhia rau cov cav siv feem ntau
Cov ntaub ntawv uas niaj hnub siv tau hauv cov cav ntoo muaj xws li cov hlau nplaum sintered thiab cov hlau nplaum ua ke. Lub ntsiab hom yog txhuas nickel cobalt, ferrite, samarium cobalt thiab neodymium hlau boron.
AlNiCo cov ntaub ntawv siv ntau dua ua ntej xyoo 1980s. Nws muaj qhov kub zoo heev, lub sijhawm ruaj khov thiab daim ntawv thov ultra-high temperature ib puag ncig. Nws siv nyob rau hauv qee qhov kev siv tshwj xeeb xws li cov motors rau kev siv tshwj xeeb xws li tub rog los yog instrumentation nrog kev kub siab thiab kev sib zog nqus ruaj ntseg. .
Ferrite cov ntaub ntawv yog cov khoom ntiag tug uas tsis yog xim hlau thiab cov khoom pheej yig. Nws yog tsuas yog siv nyob rau hauv economical series ntawm micro-motor khoom nrog tsawg kev ua tau zoo thiab ntim raws. Xws li cov khoom ua si khoom ua si, hluav taws xob hluav taws xob, tsev hluav taws xob thiab suab paj nruag, chaw ua hauj lwm khoom siv thiab cov cuab yeej siv hluav taws xob, cov tsheb thiab cov neeg tsav tsheb, thiab cov tshuab hluav taws xob muaj zog.
Samarium-cobalt khoom yog ib qho khoom siv hlau nplaum tas li nrog cov khoom sib nqus zoo heev uas tau tsim hauv nruab nrab xyoo 1960 thiab nws qhov kev ua tau zoo heev. Samarium cobalt yog tsim tshwj xeeb rau kev tsim khoom siv hluav taws xob rau cov khoom sib nqus, tiam sis vim nws cov nqi siab, nws tsuas yog siv rau kev tshawb fawb thiab kev loj hlob ntawm cov tub rog, aerospace, tub rog thiab lwm cov tub rog thiab cov tshuab hluav taws xob muaj siab kev ua tau zoo thiab tsis yog qhov tseem ceeb. Cov ntaub ntawv NdFeB hu ua cov cim thib peb ntawm cov tsev kawm ntawv qib siab uas kawm tas li ntawm xyoo 1980s. Nws cov khoom sib nqus yog siab tshaj qhov ntawm cov kab cob samarium, nws thermal stability yog pluag, thiab nws yog ib qho yooj yim rau xeb. Nws yuav tsum muaj qhov chaw tiv thaiv, tab sis nws pheej yig. Yog li sai tau nce thiab thov. Nrog cov ntaub ntawv kho tshiab ntawm NdFeB cov ntaub ntawv, qhov kev ntsuas kub tau raug kho dua. Tshwj xeeb tshaj li txij thaum xyoo 1990, cov coefficient uas tsis tshua muaj siab thiab kub cev tiv thaiv NdFeB cov ntaub ntawv tau ua tiav zoo lawm. Cov kub kub cev tiv thaiv NdFeB tuaj yeem ncav cuag kev ua haujlwm. Nyob rau ntawm 200 ° C, thiab tus nqi kuj tseem qis qis, feem ntau ntawm cov kev lag luam thiab kev siv cuab yeej siv siv NdFeB cov ntaub ntawv, thiab yuav hloov ntau dua ntawm cov ntaub ntawv ferrite rau cov nqi qis rau qis qis.
Cov khoom sib dhos ntawm cov hlau nplaum tas mus li yog kev sib tov sib xyaw magnetic cov khoom siv los ntawm kev sib tov, thawb tawm, hno, los sis thim tawm ib qho khoom siv hlau nplaum, nrog rau bonded ferrite, bonded AlNiCo, thiab khov. Cobalt thiab Cobalt-txheeb ze NdFeB. Ntawm lawv, sib koom tes NdFeB yog tam sim no qhov zoo tshaj plaws ua ke cov khoom siv hlau npliag. Sib piv nrog cov khoom siv hlau nplaum sintered lawm, nws muaj kev ua zoo ntawm kev ua tau zoo, yooj yim molding, tuaj yeem ua rau ntau yam kev sib tham, muaj kev zoo uniformity ntawm cov khoom sib nqus, thiab yog ib qho yooj yim kom ua tau ntau tus qauv magnetization. Txawm li cas los xij, cov khoom sib nqus ntawm cov khoom sib dhos ntawm cov khoom sib txuas zom zaws mus qis dua qis dua cov hom sintered cov hlau nplaum, thiab cov khoom sib nqus zog yog kwv yees li 40% txog 70% ntawm cov hlau nplaum sintered ntawm cov khoom qub. Ntawm cov ntawv cog lus ruaj khov ntawm cov khoom ntiag tug, qhov kev npaj ntawm tsev NdFeB yog qhov zoo, thiab yog tias NdFeB muaj kev sib raug zoo, qhov kev daws yog qhov khoom pheej yig tshaj plaws hauv cov khoom siv yog nws daws qhov teeb meem thiab tsim kho qhov zoo. Nws yog tam sim no feem ntau siv nyob rau hauv kev nplua micro-motors xws li me me brushless DC motors thiab stepper motors.
