Munguva pfupi yapfuura, tekinoroji painokura yakanangana nepamusoro frequency uye nekumhanya kwakanyanya, iyo eddy yazvino kurasikirwa kwemagineti rave dambudziko hombe. Especially theNeodymium Iron Boron(NdFeB) uyeSamarium Cobalt(SmCo) magineti, ari nyore kukanganiswa nekupisa. Iyo eddy yekurasikirwa ikozvino yave dambudziko guru.
Aya eddy mafungu anogara achikonzera chizvarwa chekupisa, uyezve kuderedzwa kwekuita mumamotor, jenareta, uye masensa. Anti-eddy yazvino tekinoroji yemagineti kazhinji inodzvanya chizvarwa cheeddy chazvino kana kudzvanyirira kufamba kweiyo induced ikozvino.
"Magnet Power" yakagadziridzwa iyo Anti-eddy-yazvino tekinoroji yeNdFeB uye SmCo magineti.
Iye Eddy Currents
Eddy mafungu anogadzirwa mune conductive zvinhu zviri mune inochinjika yemagetsi ndima kana kuchinjanisa magineti. Maererano nemutemo waFaraday, magineti anochinjanisa anogadzira magetsi, uye zvakasiyana. Muindasitiri, musimboti uyu unoshandiswa mumetallurgical melting. Kuburikidza nepakati-frequency induction, conductive zvinhu mucrucible, senge Fe uye mamwe masimbi, anonyengerwa kuburitsa kupisa, uye pakupedzisira zvinhu zvakasimba zvinonyungudutswa.
Iyo resistivity yeNdFeB magineti, SmCo magineti kana Alnico magineti inogara yakaderera zvakanyanya. Inoratidzwa mutafura 1. Naizvozvo, kana magineti aya achishanda mumagetsi emagetsi, kudyidzana pakati pemagineti flux uye conductive components zvinogadzira eddy currents zviri nyore.
Tafura1 Iyo resistivity yeNdFeB magineti, SmCo magineti kana Alnico magineti.
| Magnets | Rkusagadzikana (mΩ·cm) |
| Alnico | 0.03-0.04 |
| SmCo | 0.05-0.06 |
| NdFeB | 0.09-0.10 |
Zvinoenderana neMutemo waLenz, Eddy mafungu anogadzirwa muNdFeB uye SmCo magineti, anotungamira kune akati wandei asingadiwe mhedzisiro:
● Kupera Kwesimba: Nekuda kwe eddy currents, chikamu chesimba remagineti chinoshandurwa kuita kupisa, kuderedza kushanda kwechigadzirwa. Semuenzaniso, kurasikirwa kwesimbi uye kurasikirwa kwemhangura nekuda kweeddy ikozvino ndicho chinhu chikuru chekushanda kwemamota. Mumamiriro ezvinhu ekuderedzwa kwekabhoni emission, kuvandudza kushanda kwemamota kwakakosha zvikuru.
● Heat Generation uye Demagnetization: Ose magineti eNdFeB neSmCo ane tembiricha yavo yekushanda, inova yakakosha parameter yemagineti echigarire. Iko kupisa kunokonzerwa ne eddy kurasikirwa ikozvino kunoita kuti kupisa kwemagineti kukwire. Kana iyo yakanyanya tembiricha yekushanda yadarika, demagnetization ichaitika, iyo inozopedzisira yatungamira mukudzikira kwekushanda kwechishandiso kana matambudziko makuru ekuita.
Kunyanya mushure mekugadzirwa kweakakwira-kumhanya mota, senge magineti anotakura mota uye mhepo inotakura mota, iyo demagnetization dambudziko remarotor rave rakakurumbira. Mufananidzo 1 unoratidza rotor yemhepo inotakura mota ine kumhanya kwe30,000RPM. Tembiricha yakazokwira zvishoma500°C, zvichikonzera demagnetization yemagineti.
Fig1. a uye c ndiyo dhiyabhorosi yemagineti uye kugovera kweyakajairika rotor, zvichiteerana.
b uye d ndiyo dhizaini remagineti uye kugovera kwe demagnetized rotor, zvichiteerana.
Uyezve, magineti eNdFeB ane tembiricha yakaderera yeCurie (~ 320°C), inovaita demagnetization. Iyo curie tembiricha yeSmCo magineti, iri pakati pe750-820°C. NdFeB iri nyore kukanganiswa ne eddy ikozvino pane SmCo.
Anti-Eddy Current Technologies
Nzira dzinoverengeka dzakagadzirwa kuti dzideredze eddy mafungu muNdFeB uye SmCo magineti. Iyi nzira yekutanga ndeyekushandura kuumbwa uye chimiro chemagineti kusimudzira resistivity. Yechipiri nzira iyo inogara ichishandiswa muinjiniya kukanganisa kuumbwa kwemahombe eddy ikozvino zvishwe.
1.Enhance the resistivity yemagineti
Gabay et.al akawedzerwa CaF2, B2O3 kune SmCo magineti kuvandudza resistivity, iyo wan kuwedzeredzwa kubva 130 μΩ masendimita kusvika 640 μΩ cm. Nekudaro, iyo (BH) max uye Br yakadzikira zvakanyanya.
2. Lamination of Magnets
Laminating magineti, ndiyo nzira inoshanda kwazvo muinjiniya.
Magonyeti akachekwa kuita tuma layers achibva anama pamwechete. Iyo interface pakati pezvidimbu zviviri zvemagineti ndeye insulating glue. Nzira yemagetsi ye eddy currents inovhiringidzwa. Iyi tekinoroji inoshandiswa zvakanyanya mumamota anomhanya kwazvo uye majenareta. "Magnet Power" yakagadziridzwa akawanda matekinoroji ekuvandudza resistivity yemagineti. https://www.magnetpower-tech.com/high-electrical-impedance-eddy-current-series-product/
Yekutanga yakakosha parameter ndeye resistivity. The resistivity of laminated NdFeB uye SmCo magineti anogadzirwa ne "Magnet Power" yakakwirira kupfuura 2 MΩ · cm. Aya magineti anogona kumisa zvakanyanya kufambiswa kweazvino mune magineti uye obva adzvanya chizvarwa chekupisa.
Chechipiri parameter iko kukora kweglue pakati pezvidimbu zvemagineti. Kana ukobvu hweglue layer hwakanyanya kukwira, huchaita kuti huwandu hwemagineti hudzikire, zvichikonzera kudzikira kweiyo magineti flux. "Magnet Power" inogona kugadzira magineti akacheneswa ane hutema hweglue layer ye0.05mm.
3. Kupfekedza neHigh-Resistivity Materials
Insulating coatings inogara ichiiswa pamusoro pemagineti kusimudzira resistative yemagneti. Aya mabhanhire anoita sezvipingamupinyi, kuderedza kuyerera kweeddy currents pamusoro pemagineti. Zvakadai se epoxy kana parylene, ye ceramic coatings inogara ichishandiswa.
Mabhenefiti eAnti-Eddy Yazvino Technology
Anti-eddy yazvino tekinoroji yakakosha kuiswa mune akawanda maapplication neNdFeB uye SmCo magineti. Kusanganisira:
● High-speed motors: Mune ma-high-speed motors, zvinoreva kuti kumhanya kuri pakati pe30,000-200,000RPM, kudzvinyirira eddy ikozvino uye kuderedza kupisa ndicho chinhu chinokosha chinodiwa. Mufananidzo 3 unoratidza tembiricha yekufananidza yeyakajairika SmCo magineti uye anti-eddy yazvino SmCo mu2600Hz. Kana tembiricha yeakajairika SmCo magineti (kuruboshwe tsvuku imwe) inopfuura 300 ℃, tembiricha yeAnti-eddy ikozvino SmCo magineti (kurudyi bule one) haipfuure 150 ℃.
●MRI Machines: Kuderedza eddy currents kunokosha muMRI kuchengetedza kugadzikana kwezvirongwa.
Anti-eddy yazvino tekinoroji yakakosha pakuvandudza mashandiro eNdFeB uye SmCo magineti mune akawanda maapplication. Nekushandisa lamination, segmentation, uye coating tekinoroji, iwo eddy currents anogona kudzikiswa zvakanyanya mu "Magnet Power". Iyo anti-eddy yazvino NdFeB uye SmCo magineti inogoneka kuiswa mune yemazuva ano emagetsi masisitimu.
Nguva yekutumira: Sep-23-2024
