Vuba aha, uko ikoranabuhanga ritera imbere ryihuta kandi ryihuta, eddy igihombo cya magneti cyabaye ikibazo gikomeye. Cyane cyaneNeodymium Iron Boron(NdFeB) naSamarium Cobalt(SmCo) magnesi, byoroshye cyane kubushyuhe. Igihombo cya eddy cyabaye ikibazo gikomeye.
Imiyoboro ya eddy burigihe itera kubyara ubushyuhe, hanyuma gutesha agaciro imikorere muri moteri, moteri, na sensor. Ikoreshwa rya anti-eddy ya tekinoroji ya magneti mubisanzwe ihagarika ibisekuru byumuvuduko wa eddy cyangwa igahagarika ingendo yumuyaga.
"Magnet Power" yatejwe imbere tekinoroji ya Anti-eddy-ya NdFeB na SmCo.
Inzira ya Eddy
Imiyoboro ya Eddy ikorwa mubikoresho bitwara ibintu biri mumashanyarazi asimburana cyangwa umurima wa magneti. Dukurikije amategeko ya Faraday, guhinduranya imbaraga za magneti bitanga amashanyarazi, naho ubundi. Mu nganda, iri hame rikoreshwa mugushonga metallurgical. Binyuze mu kwinjiza inshuro ziciriritse, ibikoresho bitwara ibintu byingenzi, nka Fe nibindi byuma, biterwa no kubyara ubushyuhe, amaherezo ibikoresho bikomeye birashonga.
Kurwanya magnet ya NdFeB, Magnets ya SmCo cyangwa Alnico ya magneti buri gihe ni bike cyane. Yerekanwa mu mbonerahamwe ya 1.
Imbonerahamwe1 Kurwanya magnet ya NdFeB, Magnets ya SmCo cyangwa Alnico
| Magnets | Rkubaho (mΩ·cm) |
| Alnico | 0.03-0.04 |
| SmCo | 0.05-0.06 |
| NdFeB | 0.09-0.10 |
Dukurikije amategeko ya Lenz, imigezi ya Eddy ikomoka muri magneti ya NdFeB na SmCo, itera ingaruka nyinshi zitifuzwa:
L Gutakaza ingufu: Bitewe numuyaga wa eddy, igice cyingufu za magneti gihinduka ubushyuhe, bikagabanya imikorere yibikoresho. Kurugero, gutakaza ibyuma no gutakaza umuringa bitewe numuyoboro wa eddy nicyo kintu nyamukuru cyo gukora moteri. Mu rwego rwo kugabanya ibyuka bihumanya ikirere, kuzamura imikorere ya moteri ni ngombwa cyane.
Ation Gushyushya Igisekuru na Demagnetisation: Byombi bya NdFeB na SmCo bifite ubushyuhe ntarengwa bwo gukora, nikintu gikomeye cyibintu bihoraho. Ubushyuhe buterwa na eddy igihombo gitera ubushyuhe bwa magnesi kuzamuka. Iyo ubushyuhe ntarengwa bwo gukora burenze, demagnetisation izabaho, amaherezo bizatuma kugabanuka kwimikorere yibikoresho cyangwa ibibazo bikomeye byimikorere.
Cyane cyane nyuma yiterambere rya moteri yihuta, nka moteri ya magnetiki itwara moteri na moteri itwara ikirere, ikibazo cya demagnetisation ya rotor cyagaragaye cyane. Igishushanyo 1 kirerekana rotor ya moteri itwara ikirere gifite umuvuduko wa30.000RPM. Ubushyuhe amaherezo bwazamutse hafi500 ° C., bikavamo demagnetisation ya magnesi.
Igishushanyo1. a na c ni igishushanyo mbonera cya magnetiki no gukwirakwiza rotor isanzwe.
b na d ni igishushanyo mbonera cya magnetiki no gukwirakwiza rotor demagnetised.
Byongeye kandi, magnet ya NdFeB ifite ubushyuhe buke bwa Curie (~ 320 ° C), bigatuma bakora demagnetisation. Ubushyuhe bwa curie ya magneti ya SmCo, buri hagati ya 750-820 ° C. NdFeB biroroshye guhindurwa na eddy igezweho kuruta SmCo.
Kurwanya Tekinoroji Yubu
Uburyo bwinshi bwateguwe kugirango bugabanye amashanyarazi muri NdFeB na SmCo. Ubu buryo bwa mbere ni uguhindura imiterere n'imiterere ya magnesi kugirango wongere imbaraga. Uburyo bwa kabiri burigihe bukoreshwa mubuhanga kugirango uhungabanye imiterere ya eddy nini ya loop.
1.Kongera imbaraga za magnesi
Gabay et.al yongewemo CaF2, B2O3 kuri magneti ya SmCo kugirango irusheho kunanirwa, igenda yiyongera kuva kuri cm 130 μΩ kugeza kuri cm 640 μΩ cm. Nyamara, (BH) max na Br byagabanutse cyane.
2. Kumurika Magneti
Kumurika magnesi, nuburyo bwiza cyane mubuhanga.
Magnesi zaciwemo ibice bito hanyuma zirabihambira hamwe. Imigaragarire hagati yibice bibiri bya magnesi irinda kole. Inzira y'amashanyarazi kumurongo wa eddy irahagarara. Iri koranabuhanga rikoreshwa cyane muri moteri yihuta na moteri. "Imbaraga za Magnet" zatejwe imbere tekinoroji nyinshi kugirango tunoze imbaraga za magneti. https://www.
Ikintu cya mbere cyingenzi ni ukurwanya. Kurwanya magnet ya NdFeB na SmCo byakozwe na "Magnet Power" birenze 2 MΩ · cm. Izi magneti zirashobora kubuza cyane itwarwa ryumuyaga muri magneti hanyuma bigahagarika ubushyuhe.
Ikintu cya kabiri ni ubunini bwa kole hagati yibice bya magneti. Niba ubunini bwurwego rwa kole ari hejuru cyane, bizatera ingano ya magneti kugabanuka, bikaviramo kugabanuka kwa rusange muri rusange. "Imbaraga za rukuruzi" zirashobora kubyara magnesi zifite ubunini bwa kole ya 0.05mm.
3. Gupfundikanya Ibikoresho Byinshi-Kurwanya
Ipitingi ikingira buri gihe ikoreshwa hejuru ya magnesi kugirango yongere imbaraga za magnesi. Ipitingi ikora nkimbogamizi, kugirango igabanye umuvuduko wa eddy hejuru yubuso bwa magneti. Nka epoxy cyangwa parylene, ya ceramic coatings ikoreshwa buri gihe.
Inyungu za Anti-Eddy Ikoranabuhanga rigezweho
Anti-eddy ikorana buhanga ningirakamaro ikoreshwa mubikorwa byinshi hamwe na NdFeB na SmCo. Harimo:
● H.moteri yihuta: Muri moteri yihuta cyane, bivuze ko umuvuduko uri hagati ya 30.000-200.000RPM, kugirango uhagarike amashanyarazi no kugabanya ubushyuhe nicyo kintu cyingenzi gisabwa. Igishushanyo cya 3 cyerekana ubushyuhe bwo kugereranya magneti asanzwe ya SmCo na anti-eddy ya SmCo muri 2600Hz. Iyo ubushyuhe bwa magnesi zisanzwe za SmCo (ibumoso butukura) burenze 300 ℃, ubushyuhe bwa anti-eddy ya magnetiki ya SmCo (bule iburyo) ntabwo irenga 150 ℃.
●Imashini za MRI: Kugabanya eddy ingendo ningirakamaro muri MRI kugirango ukomeze ituze rya sisitemu.
Ikoreshwa rya anti-eddy rigezweho ningirakamaro cyane mugutezimbere imikorere ya magnet ya NdFeB na SmCo mubisabwa byinshi. Ukoresheje lamination, segmentation, hamwe na tekinoroji yo gutwikira, imigezi ya eddy irashobora kugabanuka cyane muri "Magnet Power". Imashini irwanya eddy ya NdFeB na SmCo birashoboka gukoreshwa muri sisitemu ya kijyambere ya electroniki.
Igihe cyo kohereza: Nzeri-23-2024
