Cov hlau nplaum tas mus li siv cov hlau nplaum tas li ua qhov zoo siab. Ntxiv nrog rau kev txo hwj chim noj, kev ua haujlwm ntawm lub cev muaj zog tuaj yeem txhim kho. Cov hlau nplaum tas mus li siv ntau yam khoom siv hlau nplaum ruaj khov, suav nrog AlNiCo hlau nplaum, ferrite hlau nplaum, thiab cov hlau nplaum tsis tshua muaj hauv ntiaj teb. AlNiCo hlau nplaum tau tsim nyob rau hauv 1930s thiab zoo kawg li rau siab remanence, Curie kub, thermal muaj peev xwm, thiab corrosion kuj. Tab sis AlNiCo hlau nplaum muaj qhov tsis zoo ntawm kev coercivity qis thiab tsis muaj peev xwm tiv thaiv demagnetization. Nrog rau qhov tshwm sim ntawm lub ntiaj teb tsis tshua muaj cov hlau nplaum ruaj khov, kev lag luam sib koom ntawm AlNiCo hlau nplaum poob qis, ces AlNiCo lub cev muaj zog hlau nplaum tsuas yog siv los ntawm tachogenerator niaj hnub no.
Ferrite hlau nplaum tau yug hauv xyoo 1950 thiab tseem muaj kev lag luam loj ntawm cov hlau nplaum ruaj khov tam sim no. Dhau li ntawm tus nqi zoo dua, kev tiv thaiv corrosion, thiab kev ua haujlwm kub ntau, ferrite hlau nplaum kuj tsis muaj teeb meem los ntawm eddy tam sim no poob vim nws cov hluav taws xob siab. Sib nqus kev ua tau zoo ntawm ferrite hlau nplaum yog qhov tsawg, ces ferrite lub cev muaj zog hlau nplaum feem ntau yog ua haujlwm rau cov nqi qis uas muaj qhov yuav tsum tau tsawg ntawm ntim thiab qhov hnyav.
Ntau tshaj li ob feem peb ntawm lub ntiaj teb tsis tshua muaj cov hlau nplaum ruaj khov yog muab rau ntau yam hlau nplaum ruaj khov motors. 1: 5 hom Sm-Co alloy, 2: 17 hom Sm-Co alloy, thiab Nd-Fe-B alloy feem ntau hu ua thawj, thib ob, thiab thib peb tiam ntawm lub ntiaj teb tsis tshua muaj hlau nplaum ruaj khov, feem. Cov hlau nplaum tsis tshua muaj hauv ntiaj teb tuaj yeem raug faib ua cov hlau nplaum sib txuas thiab cov hlau nplaum sintered raws li cov txheej txheem tsim khoom. Bonded Neodymium lub cev muaj zog hlau nplaum yog lub hauv paus hauv lub nplhaib puab thiab qhuas rau ntau tus ncej hlau nplaum, tab sis nws tsuas yog muaj nyob rau hauv micro motors vim muaj kev txwv kev sib nqus. Txawm li cas los xij sintered Samarium Cobalt hlau nplaum los yog sintered Neodymium hlau nplaum muaj hluav taws xob tsis tshua muaj hluav taws xob, tom qab ntawd ob qho tib si yuav tsum tau ntsib qhov poob tam sim no thaum siv rau hauv high-speed motors. Eddy tam sim no poob yuav ua rau kom qhov kub thiab txias nyob rau hauv cov hlau nplaum, ces ua rau irreversible demagnetization thiab ntxiv cuam tshuam lub cev muaj zog kev ua tau zoo. Laminated hlau nplaum yog ib qho kev daws teeb meem los nrhiav qhov sib npaug ntawm lub zog thiab cua sov yam tsis hloov cov hlau nplaum muaj pes tsawg leeg, lub cev muaj zog tus qauv, thiab kev ua haujlwm.
Nws yog undeniable tias sintered Samarium Cobalt hlau nplaum tseem ua si lub luag hauj lwm irreplaceable ntawm ib co kev siv lub cev muaj zog txawm tias nws ib txwm thuam los ntawm tus nqi siab thiab tsis zoo txhua yam khoom. Qhov kev ua tau zoo kawg ntawm Samarium Cobalt hlau nplaum thiab ultra-siab kub Samarium Cobalt hlau nplaum tuaj yeem muab cov motors nrog ntau txoj kev ywj pheej tsim.
Neodymium lub cev muaj zog hlau nplaum feem ntau muaj qee qhov yuav tsum tau ua rau lub cev coercivity. Intrinsic coercivity ntawm sintered Neodymium hlau nplaum tuaj yeem txhim kho tau zoo los ntawm kev ntxiv me me ntawm cov khoom hnyav hauv ntiaj teb (HREE) Dy lossis Tb. Txhawm rau kom txuag tau HREE cov peev txheej thiab tus nqi, grain ciam diffusion (GBD) thev naus laus zis twb tau siv rau Neodymium lub cev muaj zog hlau nplaum los ntawm xyoo dhau los.
Pa Neodymium lub cev muaj zog hlau nplaum feem ntau yog nyob rau hauv ntu lossis kwv yees duab, tab sis ntau tus ncej sintered nplhaib hlau nplaum yog qhov xav tau ntau dua hauv kev sib piv nrog splicing ob peb ntu hlau nplaum. Radially oriented nplhaib hlau nplaum yog lub hauv paus ntawm kev ua tiav ntawm ntau tus ncej sintered nplhaib hlau nplaum.
