Haufinyane tjena, ha theknoloji e ntse e tsoela pele ho ea ho maqhubu a phahameng le lebelo le phahameng, tahlehelo ea hona joale ea eddy ea makenete e fetohile bothata bo boholo. Haholo-holo eaNeodymium Iron Boron(NdFeB) leSamarium Cobalt(SmCo) makenete, a angoa habonolo ke mocheso. Tahlehelo ea hona joale ea eddy e fetohile bothata bo boholo.
Maqhubu ana a eddy a lula a baka mocheso, ebe ho senyeha ha ts'ebetso ho li-motor, lijenereithara le li-sensor. Theknoloji ea hona joale ea anti-eddy ea limakenete hangata e hatella tlhahiso ea eddy current kapa e hatella motsamao oa hona joale.
"Magnet Power" e ntlafalitse theknoloji ea Anti-eddy-joale ea limmanete tsa NdFeB le SmCo.
Eddy Currents
Maqhubu a Eddy a hlahisoa ka thepa ea conductive e sebakeng sa motlakase se chenchana kapa matla a khoheli a chenchana. Ho ea ka molao oa Faraday, matla a khoheli a chenchana a fehla motlakase, 'me ho fapana le hoo. Ka indasteri, molao-motheo ona o sebelisoa ka ho qhibiliha ha metallurgical. Ka ho kenya li-medium-frequency induction, lisebelisoa tsa conductive ka har'a crucible, tse kang Fe le lisebelisoa tse ling, li susumelletseha ho hlahisa mocheso, 'me qetellong lisebelisoa tse tiileng lia qhibiliha.
The resistivity ea NdFeB makenete, SmCo makenete kapa Alnico makenete kamehla tlaase haholo. E bontšitsoe tafoleng ea 1. Ka hona, haeba limakete tsena li sebetsa ka lisebelisoa tsa motlakase, tšebelisano pakeng tsa matla a khoheli le likaroloana tsa conductive li hlahisa maqhubu a eddy habonolo haholo.
Letlapa la 1 The resistivity ea limatlase tsa NdFeB, limmanete tsa SmCo kapa limagnete tsa Alnico
| Magnets | Rbofokoli (mΩ·cm) |
| Alnico | 0.03-0.04 |
| SmCo | 0.05-0.06 |
| NdFeB | 0.09-0.10 |
Ho ea ka Molao oa Lenz, maqhubu a Eddy a hlahisoang ho NdFeB le SmCo makenete, a lebisa litlamorao tse 'maloa tse sa rateheng:
● Tahlehelo ea Matla: Ka lebaka la maqhubu a eddy, karolo ea matla a khoheli e fetoloa mocheso, ho fokotsa bokhoni ba sesebelisoa. Ka mohlala, tahlehelo ea tšepe le tahlehelo ea koporo ka lebaka la eddy hona joale ke eona ntho e ka sehloohong ea katleho ea li-motors. Boemong ba phokotso ea khabone, ho ntlafatsa ts'ebetso ea likoloi ho bohlokoa haholo.
● Mofuthu oa Mocheso le Demagnetization: Ka bobeli NdFeB le SmCo makenete na le palo e kahodimodimo mocheso tshebetso ya bona, e leng parameter ea bohlokoa ea limakenete tse sa feleng. Mocheso o hlahisoang ke tahlehelo ea hona joale ea eddy o baka mocheso oa limakete. Hang ha mocheso o phahameng oa ts'ebetso o fetisitsoe, demagnetization e tla etsahala, e tla qetella e lebisa ho fokotseha ha mosebetsi oa sesebelisoa kapa mathata a tebileng a tshebetso.
Haholo-holo ka mor'a nts'etsopele ea li-motor tse lebelo le phahameng, tse kang li-motor tse nang le matla a khoheli le li-motor tse tsamaisang moea, bothata ba demagnetization ea li-rotor bo 'nile ba hlahella haholoanyane. Setšoantšo sa 1 se bontša rotor ea enjene e nang le moea e nang le lebelo la30,000RPM. Qetellong mocheso o ile oa phahama ka hoo e ka bang500°C, e bakang demagnetization ea makenete.
Setšoantšo sa1. a le c ke setšoantšo sa matla a khoheli le kabo ea rotor e tloaelehileng, ka ho latellana.
b le d ke sets'oants'o sa matla a khoheli le kabo ea rotor e demagnetized, ka ho latellana.
Ho feta moo, makenete a NdFeB a na le mocheso o tlase oa Curie (~ 320°C), e leng se etsang hore e be demagnetization. Lithempereichara tsa curie tsa makenete a SmCo, li pakeng tsa 750-820°C. NdFeB e bonolo ho angoa ke eddy hajoale ho feta SmCo.
Anti-Eddy Current Technologies
Ho na le mekhoa e 'maloa e ntlafalitsoeng ea ho fokotsa maqhubu a eddy ho mabone a NdFeB le SmCo. Mokhoa ona oa pele ke oa ho fetola sebopeho le sebopeho sa limakete ho matlafatsa matla a ho hanyetsa. Mokhoa oa bobeli o sebelisoang kamehla ho boenjiniere ho senya ho thehoa ha li-loops tse kholo tsa eddy hona joale.
1.Enhance the resistivity ea makenete
Gabay et.al li ekelitsoe CaF2, B2O3 ho SmCo makenete ho ntlafatsa resistivity, e wan matlafatsoa ho tloha 130 μΩ cm ho 640 μΩ cm,. Leha ho le joalo, (BH) max le Br e fokotsehile haholo.
2. Lamination ea Magnets
Laminating ea makenete, ke mokhoa o sebetsang ka ho fetesisa oa boenjiniere.
Limanete li ne li aroloa likotoana tse tšesaane ebe lia li kopanya. Khokahano lipakeng tsa likotoana tse peli tsa makenete ke sekhomaretsi sa insulating. Tsela ea motlakase bakeng sa maqhubu a eddy e senyehile. Theknoloji ena e sebelisoa haholo ho li-motor le lijenereithara tse lebelo le phahameng. "Magnet Power" e entsoe ka mahlale a mangata ho ntlafatsa matla a matla a makenete. https://www.magnetpower-tech.com/high-electrical-impedance-eddy-current-series-product/
Paramethara ea pele ea bohlokoa ke resistivity. The resistivity ea laminated NdFeB le SmCo makenete hlahisoang ke "Magnet Power" e phahame ho feta 2 MΩ·cm. Limakete tsena li ka thibela haholo ho tsamaisoa ha hona joale ka har'a makenete ebe li hatella tlhahiso ea mocheso.
Paramethara ea bobeli ke botenya ba sekhomaretsi pakeng tsa likotoana tsa limakete. Haeba botenya ba lesela la sekhomaretsi bo phahame haholo, bo tla etsa hore molumo oa makenete o fokotsehe, e leng se tla fella ka ho fokotseha ha phallo ea motlakase ka kakaretso. "Matla a Magnet" a ka hlahisa limmete tsa laminated tse nang le botenya ba sekhomaretsi sa 0.05mm.
3. Ho roala ka lisebelisoa tse phahameng tsa ho hanyetsa
Li-insulating coatings li lula li sebelisoa holim'a limakete ho matlafatsa matla a matla a makenete. Melaetsa ena e sebetsa e le litšitiso, ho fokotsa phallo ea maqhubu a eddy holim'a makenete. Tse kang epoxy kapa parylene, ea liphahlo tsa ceramic li lula li sebelisoa.
Melemo ea Anti-Eddy Current Technology
Theknoloji ea hajoale ea Anti-eddy e bohlokoa ho sebelisoa lits'ebetsong tse ngata tse nang le limatlase tsa NdFeB le SmCo. Ho kenyeletsoa:
● Hlienjene tse lebelo: Ka li-motor tse lebelo le phahameng, ho bolelang hore lebelo le pakeng tsa 30,000-200,000RPM, ho hatella motlakase oa eddy le ho fokotsa mocheso ke tlhokahalo ea bohlokoa. Setšoantšo sa 3 se bontša mocheso oa papiso ea magnete e tloaelehileng ea SmCo le SmCo e khahlanong le Eddy ka 2600Hz. Ha mocheso oa tloaelehileng SmCo magnets (ka ho le letšehali khubelu e mong) feta 300 ℃, mocheso oa anti-eddy hona joale SmCo makenete (tokelo bule one) ha e fete 150 ℃.
●Mechine ea MRI: Ho fokotsa maqhubu a eddy ke habohlokoa ho MRI ho boloka botsitso ba litsamaiso.
Theknoloji ea hajoale ea Anti-eddy e bohlokoa haholo bakeng sa ho ntlafatsa ts'ebetso ea limatlase tsa NdFeB le SmCo lits'ebetsong tse ngata. Ka ho sebelisa theknoloji ea lamination, segmentation le coating, maqhubu a eddy a ka fokotsoa haholo ho "Magnet Power". Li-anti-eddy tsa hona joale tsa NdFeB le SmCo makenete li ka sebelisoa lits'ebetsong tsa sejoale-joale tsa motlakase.
Nako ea poso: Sep-23-2024
