Momwe Mungapewere Kuwonongeka kwa Magnet kwa Maginito Opangidwa ndi U M'malo Otentha Kwambiri

Maginito a neodymium ooneka ngati Uperekani maginito osayerekezeka - mpaka kutentha kugunda. M'mapulogalamu monga ma mota, masensa, kapena makina akumafakitale omwe akugwira ntchito pamwamba pa 80°C, demagnetization yosasinthika imatha kuyimitsa magwiridwe antchito. U-maginito ikangotaya 10% yokha ya kutulutsa kwake, gawo lomwe lili mumpata wake limagwa, ndikupangitsa kulephera kwadongosolo. Umu ndi momwe mungatetezere mapangidwe anu:

Chifukwa Chake Kutentha Kumapha U Magnets Mofulumira

Maginito a Neodymium amachotsa maginito pamene mphamvu yotentha imasokoneza kuyanjanitsa kwawo kwa atomiki. Mawonekedwe a U amakumana ndi zoopsa zapadera:

• Kupsyinjika kwa Geometric: Kupindika kumapangitsa kuti mafunde amkati azikhala pachiwopsezo chakukula kwamafuta.
• Flux Concentration: Kuchulukirachulukira kwakukulu kwa malo omwe ali pampata kumathandizira kutaya mphamvu pakanthawi kokwera.
• Kulephera kwa Asymmetric: Mwendo umodzi umatulutsa maginito patsogolo pa winayo umasokoneza maginito.

5-Point Defense Strategy

1. Kusankha Zinthu: Yambani ndi Gawo Loyenera

Sikuti onse a NdFeB ali ofanana. Ikani patsogolo masukulu okakamiza kwambiri (H mndandanda):

2. Kuteteza Kutentha: Kuphwanya Njira Yotentha

Nkhani Yophunzira: Wopanga ma servo motor adachepetsa kulephera kwa maginito a U-92% atawonjezera 0.5mm mica spacers pakati pa ma coils ndi maginito.

3. Maginito Circuit Design: Outsmart Thermodynamics

• Osunga Flux: Mambale achitsulo kudutsa U-gap amasunga njira yosinthira panthawi yotentha.
• Maginito Pang'ono: Thamangani maginito pa 70-80% ya kudzaza kwathunthu kuti muchoke "pamutu" kuti mutengeke ndi kutentha.
• Mapangidwe Otsekedwa-Loop: Ikani maginito a U-m'nyumba zachitsulo kuti muchepetse kuwonekera kwa mpweya ndikukhazikika.

"Woyang'anira wopangidwa bwino amadula chiwopsezo cha demagnetization ndi 40% pa 150 ° C motsutsana ndi ma U-maginito opanda kanthu."
- IEEE Transactions pa Magnetics

4. Chitetezo cha Ntchito

• Derating Curves: Osadutsa malire a kutentha kwa giredi (onani tchati pansipa).
• Kuyang'anira Kutentha: Ikani masensa pafupi ndi U-miyendo kuti mupeze zidziwitso zenizeni zenizeni.
• Pewani Kupalasa Panjinga: Kutentha / kuziziritsa mwachangu kumayambitsa ma microcracks → kukomoka mwachangu.

Chitsanzo cha Derating Curve (N40SH Giredi):

Br Loss │ 0% │ 8% │ 15% │ 30%*

5. Zopaka Zapamwamba & Bonding

• Epoxy Reinforcements: Imadzaza ma microcracks kuchokera pakukula kwamafuta.
• Zopaka Zotentha Kwambiri: Parylene HT (≥400°C) imaposa plating wamba wa NiCuNi pamwamba pa 200°C.
• Kusankha Zomatira: Gwiritsani ntchito ma epoxies odzaza magalasi (kutentha kopitilira 180 ° C) kuti mupewe kutsekeka kwa maginito.

Red Flags: Kodi U Magnet Wanu Akulephera?

Zindikirani demagnetization yoyambirira:

1. Field Asymmetry:> 10% Flux kusiyana pakati pa U-miyendo (yezani ndi Hall probe).
2. Kutentha Kwambiri: Magnet amamva kutentha kwambiri kuposa malo ozungulira - akuwonetsa kuwonongeka kwapano.
3. Madontho Ogwira Ntchito: Ma motors amataya torque, masensa amawonetsa kugwedezeka, olekanitsa amaphonya zonyansa.

Kupewa Kukalephera: Njira Zopulumutsira

1. Kubwezeretsanso maginito: Kutheka ngati zinthu sizikuwonongeka mwadongosolo (zimafunika> 3T pulse field).
2. Kukutiranso: Chovala chandala, ikaninso zokutira zotentha kwambiri.
3. Replacement Protocol: Sinthani ndi SH/UH magiredi + kukweza kwamafuta.

The Winning Formula

High Hci Grade + Thermal Buffering + Smart Circuit Design = Maginito Osamva Kutentha

Maginito a neodymium ooneka ngati U amakhala bwino m'malo ovuta mukakhala:

1. Sankhani magiredi a SH/UH mwachipembedzo pa>120°C ntchito
2. Kudzipatula ku magwero otentha okhala ndi zotchinga mpweya/ceramic
3. Khazikitsani kusinthasintha ndi osunga kapena nyumba
4. Muziona kutentha pa kusiyana