Hard vs Soft Magnetic Materials
Cov khoom siv hlau nplaum tseem ceeb heev hauv kev lag luam ntsig txog hlau nplaum. Sib nqus induction yog hloov cov khoom sib nqus mus rau hauv cov hlau nplaum. Cov khoom siv hlau nplaum tawv thiab mos yog siv rau hauv cov txheej txheem magnetization. Lub tswvyim ntawm magnetization plays lub luag haujlwm tseem ceeb hauv thaj chaw xws li electromagnetic theory thiab magnetism. Nws yog ib qho tseem ceeb kom muaj kev nkag siab zoo hauv lub tswv yim ntawm kev sib nqus thiab cov khoom sib nqus. Nyob rau hauv tsab xov xwm no, peb yuav tham txog cov hlau nplaum, sib nqus induction, thiab cov khoom sib nqus mos thiab cov khoom siv hlau nplaum yog dab tsi, lawv cov kev siv, qhov zoo sib xws, thiab thaum kawg qhov sib txawv ntawm cov khoom sib nqus mos thiab cov khoom sib nqus.
Cov khoom siv hlau nplaum yog dab tsi?
Yuav kom nkag siab txog lub tswv yim ntawm cov khoom sib nqus mos, ib tus yuav tsum xub muaj kev paub keeb kwm yav dhau los hauv kev sib nqus induction. Sib nqus induction yog txheej txheem ntawm magnetization ntawm cov ntaub ntawv nyob rau hauv ib tug sab nraud magnetic teb. Cov ntaub ntawv tuaj yeem muab faib ua ntau yam raws li lawv cov khoom sib nqus. Paramagnetic cov ntaub ntawv, Diamagnetic cov ntaub ntawv thiab Ferromagnetic cov ntaub ntawv yog rau npe ob peb. Kuj tseem muaj qee yam tsawg dua xws li cov khoom siv tshuaj tiv thaiv ferromagnetic thiab cov ntaub ntawv ferrimagnetic. Diamagnetism yog qhia nyob rau hauv atoms nrog tsuas yog khub electrons. Tag nrho cov spines ntawm cov atoms yog xoom. Cov khoom sib nqus tshwm sim tsuas yog vim lub orbital motion ntawm electrons. Thaum cov khoom siv diamagnetic muab tso rau hauv qhov chaw sib nqus sab nraud, nws yuav tsim cov hlau nplaum tsis muaj zog heev los tiv thaiv kev sib luag rau sab nraud. Paramagnetic cov ntaub ntawv muaj atoms nrog unpaired electrons. Cov khoom siv hluav taws xob ntawm cov hluav taws xob tsis sib xws ua raws li cov hlau nplaum me me, uas muaj zog heev dua li cov hlau nplaum tsim los ntawm electron orbital motion. Thaum muab tso rau hauv ib qho chaw sib nqus sab nraud, cov hlau nplaum me me no ua ke nrog lub tshav pob los tsim ib qho chaw sib nqus, uas yog sib npaug rau sab nraud. Ferromagnetic cov ntaub ntawv kuj tseem yog cov ntaub ntawv paramagnetic nrog thaj tsam ntawm magnetic dipoles nyob rau hauv ib qho kev taw qhia, txawm tias ua ntej siv sab nraud magnetic teb. Thaum siv cov teb sab nraud, cov cheeb tsam sib nqus no yuav ua kom lawv tus kheej ua ke mus rau lub tshav pob kom lawv yuav ua rau thaj chaw muaj zog. Ferromagnetism tshuav nyob rau hauv cov khoom txawm tias tom qab sab nraud teb raug tshem tawm, tab sis paramagnetism thiab diamagnetism ploj mus sai li sai tau thaum lub teb sab nraud raug tshem tawm. Cov khoom sib nqus mos yog ib feem ntawm tsev neeg ferromagnetic khoom. Cov ntaub ntawv sib nqus mos qhia cov khoom sib nqus muaj zog hauv qhov chaw sib nqus sab nraud tab sis poob cov hlau nplaum tom qab tshem tawm sab nraud. Qhov no ua rau cov nplooj zoo li hysteresis nkhaus.
Cov khoom siv hlau nplaum yog dab tsi?
Cov khoom sib nqus tawv muaj zog hlau nplaum ntau dua li cov khoom sib nqus mos thaum raug rau sab nraud. Cov khoom siv hlau nplaum nyuaj yuav muaj cov hlau nplaum txawm tias tom qab tshem tawm sab nraud. Cov no yog siv los tsim cov hlau nplaum ruaj khov. Lub voj hysteresis ntawm cov khoom siv hlau nplaum nyuaj yog yuav luag ib lub xwmfab zoo ib yam.
Dab tsi yog qhov txawv ntawm Cov Khoom Sib Nqus Sib Nqus thiab Cov Khoom Sib Nqus Soft?
• Cov khoom sib nqus tawv muaj cov hlau nplaum muaj zog dua li cov khoom sib nqus mos.
• Cov khoom siv hlau nplaum tawv muaj peev xwm muaj cov hlau nplaum txawm tias tom qab qhov chaw sab nraud raug tshem tawm, tab sis cov khoom sib nqus mos tsis muaj peev xwm.
