Dab tsi yog cov khoom siv feem ntau siv hauv Motor Magnets

Kev tsom xam ntawm cov hlau nplaum lub cev muaj zog: Cov khoom siv hlau nplaum tas mus li feem ntau siv hauv cov motors suav nrog cov hlau nplaum sintered thiab cov hlau nplaum sib txuas. Cov hom tseem ceeb yog AlNiCo, ferrite, samarium cobalt, NdFeB, thiab lwm yam. Tom qab ntawd, cia peb saib cov hlau nplaum uas nquag siv. Cov ntaub ntawv yog dab tsi?

Hauv cov hlau nplaum lub cev muaj zog, AlNiCo cov khoom siv hlau nplaum ruaj khov yog qhov ntxov tshaj plaws thiab feem ntau siv cov hlau nplaum ruaj khov, thiab nws cov txheej txheem kev npaj thiab cov txheej txheem kuj paub tab. Tam sim no muaj cov chaw tsim khoom hauv Nyiv, Tebchaws Meskas, Tebchaws Europe, Russia, thiab Tuam Tshoj.

Cov khoom siv hlau nplaum ruaj khov ferrite: Hauv xyoo 1950, ferrite pib vam meej. Tshwj xeeb tshaj yog nyob rau xyoo 1970, strontium ferrite nrog kev ua tau zoo hauv kev sib koom tes thiab lub zog sib nqus tau tsim tawm, thiab kev siv cov hlau nplaum ruaj khov ferrite nthuav dav sai. Raws li cov khoom siv hlau nplaum uas tsis yog xim hlau, ferrite yog nrov vim nws yooj yim oxidation, qis Curie kub thiab cov nqi siab ntawm cov khoom siv hlau nplaum ruaj khov.

Cov khoom siv Samarium cobalt: Nws yog cov khoom siv hlau nplaum ruaj khov nrog cov khoom sib nqus zoo heev uas tau tshwm sim hauv nruab nrab -1960s, thiab nws qhov kev ua tau zoo ruaj khov. Samarium cobalt yog tshwj xeeb tshaj yog haum rau kev tsim cov motors nyob rau hauv cov nqe lus ntawm magnetic zog, tab sis vim nws cov nqi siab, nws yog tsuas yog siv nyob rau hauv kev tshawb fawb thiab kev loj hlob ntawm cov tub rog motors xws li aviation, aerospace, riam phom thiab high-tech motors uas muaj kev kawm siab. thiab tus nqi tsis yog qhov tseem ceeb.

NdFeB cov khoom siv (NdFeB cov khoom siv hlau nplaum yog cov hlau nplaum ntawm neodymium, hlau oxide, thiab lwm yam., tseem hu ua hlau nplaum hlau. tau siv dav hauv kev lag luam niaj hnub thiab tshuab hluav taws xob, ua rau nws tuaj yeem ua rau me me, sib zog, thiab nyias cov cuab yeej xws li cov twj paj nruag, electroacoustic motors, thiab sib nqus sib nqus sib nqus magnetization vim nws muaj ntau cov neodymium thiab hlau, nws yooj yim rau xeb. passivation yog ib qho kev daws teeb meem zoo dua tam sim no.

Cov ntaub ntawv ferromagnetic feem ntau siv hauv cov hlau nplaum lub cev muaj zog feem ntau muab faib ua cov ntaub ntawv tsis yog ferromagnetic thiab cov ntaub ntawv ferromagnetic raws li lawv qhov sib nqus permeability. Vim qhov tsis tshua muaj permeability ntawm cov ntaub ntawv uas tsis yog-ferromagnetic, nws nthuav tawm tsis-permeability ntawm huab cua, tooj liab, txhuas, insulating cov ntaub ntawv, thiab lwm yam, thaum lub permeability ntawm ferromagnetic cov ntaub ntawv yog siab, qhia zoo kev ua tau zoo ntawm hlau, npib tsib xee, cobalt, lawv alloys. , thiab lwm yam magnetic permeability. Nws yog tsim kom muaj lub zog sib nqus hauv lub cev muaj zog los ntawm qee qhov excitation magnetomotive quab yuam. Kev sib nqus hluav taws xob feem ntau yog ua los ntawm cov khoom siv ferromagnetic nrog siab permeability.

Lub magnetization ntawm lub cev muaj zog hlau nplaum cov ntaub ntawv txhais tau hais tias nyob rau hauv qhov kev txiav txim ntawm ib tug magnetic teb thov rau cov khoom ferromagnetic, lub magnetic teb nyob rau hauv cov khoom yog ho txhim khu kev qha, qhia ib tug muaj zog magnetic teb, uas yog magnetized los ntawm cov khoom ferromagnetic. Ferromagnetic lub cev tuaj yeem raug hlau nplaum vim tias muaj ntau cov hlau nplaum me me zoo li cov hlau nplaum sib nqus sab hauv. Cov khoom sib nqus yog sawv cev los ntawm cov hlau nplaum me me, cov khoom siv tsis cuam tshuam los ntawm sab nraud magnetic teb, cov hlau nplaum sib nqus yog chaotically tawm, thiab lawv cov teebmeem sib nqus tshem tawm ib leeg tawm, thiab sab nraud tsis qhia cov hlau nplaum. Thaum raug rau qhov kev txiav txim ntawm sab nraud magnetic teb, lub sib nqus domain yuav tiv thaiv kev sib txhuam kev sib txhuam, thiab cov hlau nplaum yuav tig mus rau hauv kev sib koom ua ke, yog li tsim ib qho chaw sib nqus ntxiv, uas yog superimposed rau sab nraud magnetic teb, thiab cov hlau nplaum tshwm sim. teb tau zoo heev. Nws tau pom tias vim tias cov qauv sab hauv ntawm cov ntaub ntawv tsis-ferromagnetic tsis muaj qhov sib nqus sib nqus thiab tsis muaj qhov tshwm sim magnetization, nyob rau hauv tib lub magnetic teb, lub magnetic teb zoo siab los ntawm cov ntaub ntawv ferromagnetic muaj zog dua li cov ntaub ntawv uas tsis yog-ferromagnetic, thiab permeability ntawm ferromagnetic. cov ntaub ntawv yog siab dua cov ntaub ntawv uas tsis yog-ferromagnetic. Cov khoom siv hlau nplaum yog qhov loj dua.