How to Prevent Demagnetization of U Shaped Magnets in High-Heat Environments

Iimagnethi ze-neodymium ezimile okwe-Uinika ugxininiso olungenakuthelekiswa nanto lwemagnethi – de kufike ubushushu. Kwizicelo ezifana neemoto, iisensa, okanye oomatshini bemizi-mveliso abasebenza ngaphezulu kwama-80°C, i-demagnetization engenakuguqulwa inokuphazamisa ukusebenza. Xa i-U-magnet ilahlekelwa yi-10% kuphela ye-flux yayo, intsimi exineneyo kwisithuba sayo iyawa, nto leyo ebangela ukungaphumeleli kwenkqubo. Nantsi indlela yokukhusela uyilo lwakho:

Kutheni Ubushushu Bubulala Iimagnethi ze-U Ngokukhawuleza

Iimagnethi zeNeodymium ziyayeka ukusebenzisa imagnethi xa amandla obushushu ephazamisa ukulungelelaniswa kwazo kweeathom. Iimilo ze-U zijongene nemingcipheko eyahlukileyo:

Uxinzelelo lweJiyometri: Ukugoba kudala iindawo zoxinzelelo lwangaphakathi ezisengozini yokwanda kobushushu.
Uxinzelelo lweFlux: Uxinano olukhulu lwentsimi kwindawo evulekileyo lukhawulezisa ukulahleka kwamandla kumaqondo obushushu aphezulu.
Ukusilela okungalinganiyo: Ukuyeka umbane omnye ngaphambi kokuba omnye uphazamise isekethe yemagnethi.

Icebo Lokuzikhusela Elinamanqaku Amahlanu

1. Ukukhetha Izinto: Qala ngeBanga eliLungileyo

Ayizizo zonke i-NdFeB ezilinganayo. Beka phambili amanqanaba aphezulu okunyanzelisa (uthotho lwe-H):

Ibanga	Ubushushu obukhulu be-Op	Uxinzelelo lwangaphakathi (Hci)	Sebenzisa ityala
N42	80°C	≥12 kOe	Kuphephe xa kushushu
I-N42H	120°C	≥17 kOe	Imizi-mveliso ngokubanzi
I-N38SH	150°C	≥23 kOe	Iimoto, ii-actuators
I-N33UH	180°C	≥30 kOe	Iimoto/ inqwelo moya
Icebiso Elilungileyo: Amanqanaba e-UH (Ultra High) kunye ne-EH (Extra High) ancama amandla athile ukuze amelane nobushushu obuphezulu obuyi-2-3×.

2. Ukukhusela Ubushushu: Yaphula Indlela Yobushushu

Icebo	Ingaba isebenza kanjani	Ukusebenza kakuhle
Izikhewu zoMoya	Yahlula imagnethi kumthombo wobushushu	↓10-15°C kwiindawo zokudibanisa
Izigqubutheli zobushushu	Izikhenkcezisi ze-ceramic/polyimide	Ukuqhuba iibhloko
Ukupholisa Okusebenzayo	Izinki zobushushu okanye umoya onyanzelisiweyo	↓20-40°C kwiindawo ezivalekileyo
Iingubo eziKhanyisayo	Igolide/iileya ze-aluminiyamu	Ibonakalisa ubushushu obukhanyayo

Into yokuphonononga: Umenzi weemoto zeservo unciphise ukusilela kwe-U-magnet nge-92% emva kokongeza ii-0.5mm mica spacers phakathi kweekhoyili kunye neemagnethi.

3. Uyilo lweSekethe yeMagnetic: I-Thermodynamics ekrelekrele kakhulu

IiFlux Keepers: Iipleyiti zentsimbi ezijikeleze i-U-gap zigcina indlela ye-flux ngexesha loxinzelelo lobushushu.
Ukwenziwa kweMagnetizer okuNgaphelelanga: Sebenzisa iimagnethi kwi-70-80% yobungakanani obupheleleyo ukuze ushiye "igumbi eliphambili" ukuze ubushushu buqhubeke.
Uyilo lweLoop eValiweyo: Faka ii-U-magnets kwiindawo zentsimbi ukunciphisa ukuvezwa komoya kunye nokuzinzisa ukuhamba komoya.

"Isixhobo esilungiselelwe kakuhle sinciphisa umngcipheko wokususwa kwemagnethi ngama-40% kwi-150°C xa kuthelekiswa ne-U-magnets engenanto."
– Iintengiselwano ze-IEEE kwiMagnetics

4. Izikhuselo Zokusebenza

Iigophe ezibangela ukudumba: Ungaze udlule imida yobushushu obuhambelana nomgangatho othile (jonga itshathi engasezantsi).
Ukubeka iliso kubushushu: Faka izinzwa kufutshane ne-U-legs ukuze ufumane izilumkiso zexesha langempela.
Kuphephe Ukujikeleza ngebhayisikile: Ukufudumeza/ukupholisa ngokukhawuleza kubangela ukuqhekeka okuncinci → ukususwa kombane ngokukhawuleza.

Umzekelo weKreyiti eDerating (Udidi lwe-N40SH):

Ubushushu (°C) │ 20° │ 100° │ 120° │ 150°

Ukulahleka kweBr │ 0% │ 8% │ 15% │ 30%*

5. Iingubo eziPhambili kunye nokuBonda

Ukuqinisa i-Epoxy: Izalisa ii-microcracks ezivela ekukhuleni kobushushu.
Iingubo zobushushu obuphezulu: I-Parylene HT (≥400°C) idlula i-NiCuNi plating eqhelekileyo engaphezulu kwama-200°C.
Ukukhetha Okuncamathelisayo: Sebenzisa ii-epoxies ezizaliswe yiglasi (iqondo lobushushu elingaphezulu kwe-180°C) ukuthintela ukuqhekeka kwemagnethi.

Iiflegi ezibomvu: Ngaba i-U yakho yeMagnet iyasilela?

Fumanisa ukwenziwa kwemagnethi kwinqanaba lokuqala:

I-Field Asymmetry: >10% umahluko we-flux phakathi kwe-U-legs (umlinganiselo nge-Hall probe).
Ukunyuka kobushushu: Imagnethi ivakala ishushu kuneengingqi ezingqongileyo – ibonisa ukulahleka kombane we-eddy.
Ukuhla kokusebenza: Iimoto zilahlekelwa yi-torque, izinzwa zibonisa ukushukuma, izahluli azinazo izinto ezingcolisayo ze-ferrous.

Xa Ukuthintela Kungaphumeleli: Amaqhinga Okusindisa

Ukuphinda kutsalwe umbane: Kunokwenzeka ukuba izinto azonakalanga ngokwesakhiwo (ifuna intsimi ye-pulse ye->3T).
Ukuphinda ufake i-coating: Susa i-plating ebolileyo, phinda ufake i-coating enobushushu obuphezulu.
Iprotokholi yoTshintsho: Tshintshana ngee-SH/UH grades + uphuculo lobushushu.

Ifomula Ephumeleleyo

Ibanga le-Hci ephezulu + i-Thermal Buffering + uyilo lwe-Smart Circuit = Iimagnethi ze-U ezimelana nobushushu

Iimagnethi ze-neodymium ezimile okwe-U ziyachuma kwiindawo ezinzima xa:

Khetha amanqanaba e-SH/UH ngokweemfuno zokusetyenziswa kwe->120°C
Zihlukanise nemithombo yobushushu enemiqobo yomoya/yeseramikhi
Zinzisa ukuhambahamba kwabagcini okanye izindlu
Jonga ubushushu kwindawo evulekileyo

Iprojekthi yakho yeNeodymium Magnets eyenziwe ngokwezifiso

Singanikezela ngeenkonzo ze-OEM/ODM zeemveliso zethu. Imveliso ingenziwa ngokwezifiso ngokweemfuno zakho, kubandakanya ubungakanani, iMilo, ukusebenza, kunye nokugquma. Nceda unikeze amaxwebhu akho oyilo okanye usixelele izimvo zakho kwaye iqela lethu le-R&D liza kwenza okuseleyo.