Muva nje, njengoba ubuchwepheshe buthuthuka bubheke kwimvamisa ephezulu kanye nesivinini esikhulu, ukulahleka kwamanje kwamazibuthe sekuyinkinga enkulu. Ikakhulukazi iI-Neodymium Iron Boron(NdFeB) kanye ne-Samarium Cobalt(SmCo) omagnet, bathinteka kalula ngenxa yokushisa. Ukulahlekelwa kwamanje kwe-eddy sekuyinkinga enkulu.
Lawa ma-eddy currents ahlala eholela ekukhiqizeni ukushisa, bese ukonakala kokusebenza kwamamotho, amajeneretha, nezinzwa. Ubuchwepheshe bamanje be-Anti-eddy bomazibuthe buvamise ukucindezela ukukhiqizwa kwe-eddy current noma bucindezela ukunyakaza kwamanje owenziwe.
"I-Magnet Power" ithuthukiswe ubuchwepheshe be-Anti-eddy-current of NdFeB kanye nozibuthe be-SmCo.
I-Eddy Currents
Ama-Eddy currents akhiqizwa ngezinto ezisebenzayo ezisendaweni kagesi eshintshanayo noma inkambu kazibuthe eshintshanayo. Ngokomthetho kaFaraday, amandla kazibuthe ashintshanayo akhiqiza ugesi, futhi okuphambene nalokho. Embonini, lesi simiso sisetshenziswa ekuncibilikeni kwe-metallurgical. Ngokungeniswa kwe-medium-frequency, izinto ezisebenzayo ku-crucible, njenge-Fe nezinye izinsimbi, ziyengelwa ukukhiqiza ukushisa, futhi ekugcineni izinto eziqinile ziyancibilika.
Ukumelana nozibuthe be-NdFeB, omagnet be-SmCo noma omagnethi be-Alnico kuhlala kuphansi kakhulu. Kuboniswe kuthebula 1. Ngakho-ke, uma lezi zidonsa zisebenza kumishini kazibuthe, ukusebenzisana phakathi kwe-flux kazibuthe kanye nezingxenye ezihambisayo kukhiqiza ama-eddy currents kalula kakhulu.
Ithebula1 Ukumelana nozibuthe be-NdFeB, omazibu be-SmCo noma omagnethi be-Alnico
| Omazibuthe | Rukuqina (mΩ·cm) |
| Alnico | 0.03-0.04 |
| I-SmCo | 0.05-0.06 |
| NdFeB | 0.09-0.10 |
Ngokomthetho kaLenz, imisinga ye-Eddy ekhiqizwe kumazibuthe we-NdFeB kanye ne-SmCo, iholela emiphumeleni eminingi engathandeki:
● Ukulahlekelwa Amandla: Ngenxa yama-eddy currents, ingxenye yamandla kazibuthe iguqulelwa ekushiseni, okunciphisa ukusebenza kahle kwedivayisi. Isibonelo, ukulahlekelwa kwensimbi nokulahlekelwa kwethusi ngenxa yamanje ye-eddy kuyisici esiyinhloko sokusebenza kahle kwama-motor. Esimweni sokunciphisa ukukhishwa kwekhabhoni, ukuthuthukisa ukusebenza kahle kwamamotho kubaluleke kakhulu.
● I-Heat Generation kanye ne-Demagnetization: Kokubili omazibuthe be-NdFeB kanye ne-SmCo banezinga lokushisa eliphezulu lokushisa eliphezulu lokusebenza, okuyipharamitha ebalulekile yozibuthe baphakade. Ukushisa okukhiqizwa ukulahlekelwa kwamanje kwe-eddy kubangela ukuthi izinga lokushisa lomazibuthe likhuphuke. Uma izinga lokushisa eliphezulu lokusebenza selidlulile, i-demagnetization izokwenzeka, okuzogcina kuholele ekwehleni komsebenzi wedivayisi noma izinkinga ezinkulu zokusebenza.
Ikakhulukazi ngemva kokuthuthukiswa kwamamotho anesivinini esikhulu, njengama-motor magnetic bearing kanye nama-motor aphethe umoya, inkinga ye-demagnetization yama-rotor iye yabonakala kakhulu. Umfanekiso 1 ubonisa i-rotor yemoto ephethe umoya enesivinini se30,000RPM. Izinga lokushisa lagcina lenyuka cishe500°C, okuholela ekuphelelweni uzibuthe kozibuthe.
Umdwebo1. u-a kanye no-c umdwebo wensimu kazibuthe nokusatshalaliswa kwe-rotor evamile, ngokulandelana.
b kanye no-d umdwebo wensimu kazibuthe nokusatshalaliswa kwerotha engasebenzi uzibuthe, ngokulandelana.
Ngaphezu kwalokho, omazibuthe be-NdFeB banezinga lokushisa eliphansi le-Curie (~320°C), okubenza bangabi namagnetization. Amazinga okushisa e-curie omazibuthe be-SmCo, aphakathi kuka-750-820°C. I-NdFeB kulula ukuthi ithintwe i-eddy yamanje kune-SmCo.
Anti-Eddy Current Technologies
Izindlela ezimbalwa zenzelwe ukunciphisa ama-eddy currents kuma-NdFeB kanye nozibuthe be-SmCo. Le ndlela yokuqala iwukushintsha ukwakheka kanye nesakhiwo samagnethi ukuze kuthuthukiswe ukumelana nokumelana. Indlela yesibili ehlala isetshenziswa kubunjiniyela ukuphazamisa ukwakheka kwezihibe ezinkulu zamanje ze-eddy.
1.Thuthukisa ukumelana nozibuthe
I-Gabay et.al yengezwe i-CaF2, B2O3 kozibuthe be-SmCo ukuze kuthuthukiswe ukumelana nokuqina, okuthuthukisiwe kusuka ku-130 μΩ cm kuya ku-640 μΩ cm. Nokho, i-(BH)max ne-Br yehle kakhulu.
2. Lamination of Magnets
Laminating the odonsa, kuyindlela ephumelela kakhulu kwezobunjiniyela.
Ozibuthe babesikwa babe izingqimba ezincane base behlanganiswa. I-interface phakathi kwezingcezu ezimbili zikamagnet i-insulating glue. Umzila kagesi wama-eddy currents uphazamisekile. Lobu buchwepheshe busetshenziswa kakhulu kumamotho anesivinini esikhulu namajeneretha. "Amandla kaMagnet" athuthukiswe ubuchwepheshe obuningi bokuthuthukisa ukumelana nozibuthe. https://www.magnetpower-tech.com/high-electrical-impedance-eddy-current-series-product/
Ipharamitha yokuqala ebalulekile yi-resistivity. Ukumelana nozibuthe we-NdFeB kanye ne-SmCo laminated ezikhiqizwe “Amandla Kazibuthe” kuphezulu kuno-2 MΩ·cm. Lezi zidonsa zingavimbela ngokuphawulekayo ukuhamba kwamandla kukazibuthe bese zicindezela isizukulwane sokushisa.
Ipharamitha yesibili ubukhulu beglue phakathi kwezingcezu zikamazibuthe. Uma ukushuba kwesendlalelo seglue kuphakeme kakhulu, kuzokwenza ukuthi umthamo uzibuthe wehle, okuholela ekwehleni kwe-flux kazibuthe iyonke. I-“Magnet Power” ingakhiqiza izibuthe ezilanyisiwe ezinogqinsi lwe-glue layer engu-0.05mm.
3. Ukumboza Ngezinto Eziqinile Eziqinile
I-insulating coatings ihlale isetshenziswa ebusweni bodonsa ukuze kuthuthukiswe ukumelana nozibuthe. Lezi zimbozo zisebenza njengezithiyo, ukunciphisa ukugeleza kwemisinga ye-eddy ebusweni bukazibuthe. Njenge-epoxy noma i-parylene, yezingubo ze-ceramic zihlala zisetshenziswa.
Izinzuzo ze-Anti-Eddy Current Technology
Ubuchwepheshe bamanje be-Anti-eddy bubalulekile busetshenziswa ezinhlelweni eziningi ezinozibuthe be-NdFeB kanye ne-SmCo. Kubandakanya:
● Hama-igh-speed motors: Kumamotho anesivinini esikhulu, okusho ukuthi ijubane liphakathi kuka-30,000-200,000RPM, ukucindezela i-eddy current kanye nokunciphisa ukushisa kuyisidingo esibalulekile. Umfanekiso wesi-3 ubonisa izinga lokushisa lokuqhathanisa likazibuthe we-SmCo evamile kanye ne-anti-eddy yamanje ye-SmCo ku-2600Hz. Lapho izinga lokushisa ezivamile SmCo ozibuthe (obomvu kwesokunxele) idlula 300℃, izinga lokushisa anti-eddy wamanje SmCo odonsa (kwesokudla bule one) ingeqi 150℃.
●Imishini ye-MRI: Ukunciphisa ama-eddy currents kubalulekile ku-MRI ukuze kugcinwe ukuzinza kwezinhlelo.
Ubuchwepheshe bamanje be-Anti-eddy bubaluleke kakhulu ekwenzeni ngcono ukusebenza kozibuthe be-NdFeB kanye ne-SmCo ezinhlelweni eziningi. Ngokusebenzisa i-lamination, i-segmentation, kanye nobuchwepheshe bokuhlanganisa, ama-eddy currents angancishiswa kakhulu "Kumandla Kazibuthe". Ozibuthe be-anti-eddy bamanje be-NdFeB kanye ne-SmCo kungenzeka ukuthi basetshenziswe ezinhlelweni zesimanje zikagesi.
Isikhathi sokuthumela: Sep-23-2024
