Hom, yam ntxwv, thiab daim ntawv thov ntawm cov khoom sib nqus mos

Cov ntaub ntawv mos sib nqus xa mus rau cov ntaub ntawv uas tau txais kev sib nqus ntawm Hc tsis tshaj 1000A / m, thiab hu ua mos hlau nplaum. Ib qho khoom siv sib nqus zoo tuaj yeem ua tiav qhov siab tshaj plaws magnetization nrog qhov tsawg tshaj plaws sab nraud magnetic teb. Cov khoom sib nqus mos yog cov khoom sib nqus nrog cov coercivity qis thiab siab permeability. Cov ntaub ntawv sib nqus mos yog yooj yim rau magnetize thiab demagnetize, thiab yog dav siv hauv cov khoom siv hluav taws xob thiab hluav taws xob. Feem ntau siv cov khoom sib nqus hlau nplaum yog hlau silicon alloys (silicon steel nplooj) thiab ntau yam khoom sib nqus ferrite. Nws muaj cov yam ntxwv ntawm nqaim thiab ntxhab hysteresis voj, ze li ntawm cov txheej txheem magnetization rov qab, qis hysteresis poob, siab permeability, thiab qis coercive quab yuam. Xws li cov ntawv silicon steel, muaj cov hlau ntshiab, cov pa roj carbon ntshiab, thiab lwm yam.

Sib nqus cov ntaub ntawv nrog tsawg coercivity, kuj hu ua high conductivity magnetic cov ntaub ntawv. Hlau cores siv nyob rau hauv kev tsim cov khoom siv hluav taws xob xws li motors thiab transformers hauv kev lag luam fais fab. Siv hauv kev lag luam hluav taws xob los tsim ntau yam khoom sib nqus, dav siv hauv TV, tshaj tawm, thiab kev sib txuas lus. Cov khoom no muaj cov yam ntxwv xws li siab saturation magnetic flux ceev, siab magnetic permeability, nqaim hysteresis loops, me me, tsis tshua muaj hysteresis poob, thiab tsawg seem hlau nplaum thiab coercive quab yuam. Thaum siv nyob rau hauv cov xwm txheej kev sib txuas lus, tsis tshua muaj eddy tam sim no thiab hysteresis poob yuav tsum tau. Feem ntau siv xws li cov hlau ntshiab, cov pa roj carbon tsawg, silicon steel ntawv, permalloy, ferrite, thiab lwm yam.

(1) Cov hlau ntshiab thiab cov pa roj carbon tsawg: siab sib nqus permeability thiab kev ua haujlwm zoo. Txawm li cas los xij, vim qhov poob siab tam sim no, nws tsuas yog haum rau DC hlau cores.

(2) Silicon steel ntawv thiab sawb: siab resistivity thiab tsis tshua muaj eddy tam sim no poob. Tab sis qhov kev ntxhib los mos yog nkig thiab kev ua haujlwm tsis zoo. Laminate los yog yob rau hauv ib lub voj voog rau siv, nrog insulating xim los yog ib tug oxide txheej tsim ntawm cov nplooj ntawv kom txo tau eddy tam sim no poob.

(3) Permalloy: Ib lo lus dav dav rau cov hlau nickel alloys, uas muaj cov hlau nplaum permeability siab. Siv rau cov cuab yeej precision, kaw lub taub hau, thiab lwm yam kev siv uas yuav tsum tau ntim me me.

(4) Ferrite: Nrog Fe2O3 yog cov khoom tseem ceeb, tov nrog Mn Zn los yog Ni Zn, nws yog nias rau hauv manganese zinc ferrite los yog npib tsib xee zinc ferrite siv hmoov metallurgy txoj kev. Nws muaj siab resistivity thiab tsis tshua muaj high zaus poob. Cov qub yog siv rau cov zaus qis dua 1MHz, thaum kawg yog siv rau microwave zaus. Qhov siab dua qhov kev khiav hauj lwm zaus, qhov qis dua nws cov magnetic permeability. Ferrites yog cov khoom sib nqus ferrous, nrog qis sib nqus permeability dua li cov ntaub ntawv ferromagnetic.

Ib qho khoom siv sib nqus zoo tuaj yeem ua tiav qhov siab tshaj plaws magnetization nrog qhov tsawg tshaj plaws sab nraud magnetic teb. Cov ntaub ntawv sib nqus mos tuaj yeem muab faib ua peb pawg: hlau mos magnetic cov ntaub ntawv, ferrite mos magnetic cov ntaub ntawv, thiab magnetic media. Hlau mos hlau nplaum tuaj yeem muab faib ua plaub pawg: electromagnetic ntshiab hlau, silicon steel ntawv, hlau nickel alloy, thiab hlau aluminium alloy.