Sib nqus lub zog txwv ntawm Isotropic Resin-Tech Bonded
Hauv cov hlau nplaum isotropic, NdFeB hmoov cov khoom tsis sib nqus sib nqus thaum lub sij hawm molding. Qhov tshwm sim remanence (Br) yog kwv yees li ib nrab ntawm anisotropic sintered khoom ntawm tib cov hmoov zoo. Hom isotropic bonded NdFeB: Br 4.5-6.5 kGs, BHmax 5-8 MGOe. Qhov no txwv tsis pub siv rau cov motors uas tsis tshua muaj zog, sib nqus encoders, Hall effect sensors, thiab tuav cov khoom siv nrog cov pa me me.
Rau kev sib piv, anisotropic bonded NdFeB (tsim los ntawm compression molding hauv magnetic teb) tuaj yeem ua tiav Br 7-9 kGs thiab BHmax 10-14 MGOe, tab sis cov txheej txheem qeeb dua thiab cov duab geometries raug txwv rau cov duab yooj yim (blocks, rings). Yog tias koj tus qauv tsim yuav tsum muaj 3D geometry complex, isotropic txhaj molding yog tib txoj kev xaiv.
Multi-Pole Magnetization nrog Txhaj Molding
Txhaj moulded hlau nplaum tuaj yeem raug hlau nplaum ncaj qha tom qab molding siv ntau- ncej fixture. Ncej suav los ntawm 2 mus rau 128 yog ua tiav ntawm lub nplhaib lossis arc geometries. Lub polymer binder tso cai rau cov hlau nplaum los ntawm cov tuab, ua kom muaj ntau yam radial - ncej qauv ntawm cov phab ntsa nyias (tsawg phab ntsa thickness 0.8mm). Piv txwv li, 20 hli txoj kab uas hla, 3 hli tuab txhaj molded nplhaib hlau nplaum tuaj yeem sib nqus nrog 24 alternating ncej ntawm nws sab hauv kab rau BLDC rotor.
Tsis zoo li cov hlau nplaum sintered, uas yuav tsum tau sib cais cov hlau nplaum sib nqus thiab muaj kev pheej hmoo tawg thaum lub sij hawm sib nqus, cov hlau nplaum txhaj tshuaj moulded muaj zog. Lawv nqus magnetization kev nyuaj siab yam tsis muaj pob txha.
Tolerance thiab Complex Shape Capabilities: Txhaj Molded vs. Compression Bonded
| Khoom | Txhaj Moulded NdFeB | Compression Bonded NdFeB | Sintered NdFeB (rau siv) |
|---|---|---|---|
| Max BHmax (MGOe) | 5 – 8 | 8 – 12 | 35 – 52 |
| Qhov hnyav (kG) | 4.5 – 6.5 | 6.5 – 8.5 | 11.7 – 14.8 |
| Dimensional kam rau ua (mm) | ±0.05 – 0.10 | ±0.10 – 0.20 | ± 0.05 - 0.15 (tom qab sib tsoo) |
| Min phab ntsa thickness (mm) | 0.8 | 1.5 | 2.0 (kwv yees) |
| Kev sib xyaw nrog cov hlau ntxig | Yog (overmolding) | Tsis muaj (ntxig tom qab molding) | Tsis muaj |
| Multi-ncej magnetization (max ncej) | 128 | 64 | Custom (yuav tsum tau fixture) |
| Ua haujlwm kub max (degree) | 120-150 (nylon / PPS) | 150 (epoxy) | 80-220 (qib nyob ntawm) |
| Tus nqi ntawm cov khoom siv txheeb ze (ib kg) | 2.0 – 2.5 | 1.6 – 1.8 | 1.0 (lub hauv paus rau N35) |
| Lub sij hawm voj voog (seconds) | 20-40 (ntau kab noj hniav) | 60-120 | N/A (sintering teev) |
Kev vibration Resistance xav txog hauv kev siv Sensor
Cov hlau nplaum nplaum muaj cov polymer matrix uas absorbs mechanical shocks thiab vibration. Nyob rau hauv daim ntawv thov sensor (xws li, log ceev sensors, crankshaft txoj hauj lwm sensors, encoders), sintered hlau nplaum yuav tawg nyob rau hauv rov qab thermal cycling los yog kev co, tshwj xeeb tshaj yog yog mounted nrog nruj adhesives. Txhaj moulded hlau nplaum tshem tawm kev pheej hmoo tawg. Lawv coefficient ntawm thermal expansion (20-40 ppm / degree) zoo sib xws ntawm cov yas thiab PCBs, txo cov kev ntxhov siab ntawm cov pob qij txha thiab cov potting compounds.
Rau tsheb nyob rau hauv -hood sensors raug 20g kev co thiab -40℃mus rau 150℃cycles, txhaj molded NdFeB nrog PPS binder yog tus qauv xaiv. ISO 16750-3 Cov ntawv ceeb toom kev vibration
Rau cov tuam txhab hluav taws xob uas xav tau cov khoom sib nqus- zoo li cov hlau nplaum (ntiv nplhaib, arcs, trapezoids, kev cai ntxig) nrog ntau-ncej hlau nplaum, thov mus saib peb Cov Khoom Siv Hluav Taws Xob Neodymium Magnet thiab Txhaj Tshuaj Magnet ntawm peb lub vev xaib.
Txhawm rau tham txog koj lub sensor lossis micro-motor tsim - suav nrog tus lej suav, kev ua haujlwm kub, thiab qhov xav tau sib nqus flux - hu rau peb pab pawg ua haujlwm hlau nplaum sib txuas. Peb muab DFM dawb (tsim rau kev tsim khoom) kev soj ntsuam thiab cov qauv siv cov lus hais.
Cov lus nug nquag
Q: Puas tuaj yeem txhaj tshuaj moulded hlau nplaum tuaj yeem sib nqus tom qab overmolding rau ntawm steel ncej?
A: Yog. Cov ncej steel ua raws li txoj hauv kev rov qab los, uas yuav hloov me ntsis ntawm cov qauv hlau nplaum. Peb pom zoo FEA simulation ua ntej. Peb ua ncej-moulding magnetization hauv-tsev.
Q: Dab tsi yog lub sij hawm txhuas txhuas rau kev txhaj tshuaj molding cuab yeej rau cov hlau nplaum kev cai?
A: 4-6 lub lis piam rau ib zaug-cov cuab yeej kab noj hniav (cov cuab yeej mos rau kev ua qauv). 8-10 lub lis piam rau ntau cov kab noj hniav ntau lawm (hardened steel). Cov khoom seem muaj 2 lub lis piam tom qab ua tiav cov cuab yeej.
Q: Puas yog txhaj tshuaj molded hlau nplaum haum rau cov khoom siv kho mob uas yuav tsum tau ua kom tsis muaj menyuam los ntawm autoclave (121 degree)?
A: Yes, if binder is PPS (polyphenylene sulfide) with heat deflection temperature >200 degree. Nylon binder degrades nyob rau hauv rov qab autoclave cycles. Peb muab kev kho mob- qib sib txuas hlau nplaum nrog USP Class VI daim ntawv pov thawj.
