Magnetic Requirements rau Wiper thiab Seat Motors
Lub cev muaj zog wiper lub cev muaj zog tsim 3-5 N·m torque ntawm 30-60 rpm siv 4-6 ferrite arc ntu (anisotropic strontium ferrite, qib FB9B, Br 4.2-4.4 kGs). Lub tsev stator muaj cov hlau nplaum ferrite, thaum lub rotor yog tus qauv DC lub cev muaj zog armature. Ferrite qhov qis Br yog qhov siv tau vim tias lub cev muaj zog ua haujlwm tsis tu ncua (lub voj voog ua haujlwm<20%) and space under the hood is not extremely constrained.
Rau lub rooj zaum adjuster motors (me me, 10-20W), isotactic ferrite (Br 2.2-2.5 kGs) los yog sib koom ferrite rings yog siv. Cov no xav tau ntau-ncej magnetization (12-24 ncej) ncaj qha rau ntawm txoj kab uas hla ntawm lub nplhaib ferrite. Txhaj-molded ferrite rings ua tiav phab ntsa thickness tsawg li 3 hli thiab OD mus txog 50 hli, nrog rau tus ncej-rau-ncej variation<3%.
Qhov txiaj ntsig tseem ceeb: ferrite tsis tas yuav muaj cov ntsiab lus hauv ntiaj teb tsawg (tsis muaj neodymium, dysprosium, lossis praseodymium), ua rau cov saw hlau tiv thaiv tsis tshua muaj nqi hauv ntiaj teb. Rau automotive OEMs nrhiav kev ruaj khov ntev - lub sij hawm pricing, ferrite yog nyiam tshaj NdFeB rau tsis yog - motors tseem ceeb.
Hard Ferrite's Resistance to Low -Tub kub Demagnetization
Cov hlau nplaum ferrite nthuav tawm kev sib koom ua ke raws li qhov kub thiab txias - qhov sib txawv ntawm NdFeB. Ntawm -40 degree, ferrite's Hcj nce 15-20% piv rau chav tsev kub, thaum NdFeB's Hcj poob los ntawm 10-15%. Nyob rau hauv cov huab cua txias, ferrite-raws li wiper motors thiab cua txias kiv cua fim tsis muaj kev pheej hmoo demagnetization thaum pib txias, txawm tias rotor stalled tej yam kev mob (siab tam sim no).
Qhov no ua rau ferrite zoo tagnrho rau kev siv tsheb uas yuav tsum dhau -40℃cia thiab kev xeem ua haujlwm (ISO 16750). NdFeB nyob rau hauv cov xwm txheej zoo li no yuav tsum muaj qhov hnyav hnyav hnyav ntxiv (Dy lossis Tb) los tswj Hcj, nce cov khoom siv los ntawm 30-50%.
Tus nqi -Kev Tshawb Fawb Cov txiaj ntsig: Ferrite vs. NdFeB rau Cov Nyiaj Txiag nruj
| Metric | Ferrite (Y40/FB9B) | NdFeB (N35) | Tus nqi cuam tshuam |
|---|---|---|---|
| Tus nqi khoom loj (USD / kg) | $3 – 8 | $25 – 35 | Ferrite yog 80-90% pheej yig dua |
| Qhov hnyav (kG) | 3.8 – 4.4 | 11.7 – 12.2 | NdFeB muab 2.5-3x siab dua flux ib ntim |
| Yuav tsum tau ntim rau tib lub zog | 2.5-3x loj | 1x pib | Ferrite motors loj dua thiab hnyav dua |
| Max ua haujlwm kub (degree) | 250 (irreversible loss >300 degree) | 80-150 (nyob ntawm qib) | Ferrite tuav cov temps siab dua yam tsis muaj txheej |
| Corrosion kuj | Zoo heev (tsis xav tau txheej) | Tsis zoo (yuav tsum tau Ni lossis epoxy) | Ferrite txuag cov nqi txheej |
| Tooling nqi (arc ntu) | $500-1500 ib tug tuag | $800-2500 ib tug tuag | Tsawg me ntsis rau ferrite |
| MOQ (pcs) | 10,000+ | 1,000+ | Ferrite nyiam qhov ntim siab |
Rau ib tug raug wiper lub cev muaj zog ua 4 N·m torque, ib tug NdFeB-raws li tsim siv 50g ntawm N35 hlau nplaum cov khoom raug nqi 1.50.Aferrite-baseddesignuses150gofmaterialcosting1.50.Aferrite-baseddesignuses150gofmaterial.costing Qhov loj ferrite lub cev muaj zog yuav tsum tau 30% ntau tooj liab hlau thiab 20% ntau steel lamination, ntxiv 0.60-0.60-0.80. Tag nrho cov nqi hluav taws xob yog kwv yees sib npaug, tab sis ferrite zam tsis tshua muaj lub ntiaj teb txaus txaus ntshai.
Rau lub rooj zaum adjuster motors (5-10W), ferrite ib txwm pheej yig dua vim hais tias lub cev muaj zog qhov sib txawv me me thiab tooj liab / steel nqi dominate.
Tooling Development thiab Automated Assembly Compatibility
Ferrite magnets are produced by dry pressing or wet pressing of calcined strontium ferrite powder. Wet pressing achieves higher Br (up to 4.4 kGs vs 4.1 kGs for dry) but requires drying after pressing, increasing cycle time. For high-volume automotive orders (>500,000 daim / xyoo), ntub nias yog tsim nyog.
Tooling: peb muab ntau- kab noj hniav tuag (4-16 kab noj hniav) los txo nqi tsev. Kev kam rau siab: ± 0.1mm ntawm qhov ntev / dav, ± 0.05mm ntawm thickness tom qab sib tsoo. Rau cov kab sib dhos tsis siv neeg, cov hlau nplaum ferrite tau muab rau hauv cov tais nrog cov kab lus sib xws (N / S). Peb kuj muab cov hlau nplaum sib dhos nrog cov nplaum ua ntej- siv rau hauv kab ntxig.
Rau cov chaw tsim khoom siv tsheb uas xav tau ferrite arc ntu, nplhaib, lossis cov duab kev cai nrog ntau- ncej hlau nplaum, thov mus saib peb nplooj ntawv Ferrite Magnet khoom ntawm peb lub vev xaib. Peb yog IATF 16949 tau ntawv pov thawj thiab muab Tier 1 cov neeg siv khoom tsheb thoob ntiaj teb.
Txhawm rau sib tham txog koj lub cev lub zog lub hom phiaj, lub voj voog lub luag haujlwm, thiab ntim txhua xyoo, hu rau peb pab pawg tsav tsheb hlau nplaum. Peb muab cov ncauj lus kom ntxaws BOM sib piv ntawm ferrite thiab NdFeB rau koj qhov kev tsim tshwj xeeb.
Cov lus nug nquag
Q: Cov hlau nplaum ferrite puas tuaj yeem siv rau hauv lub tshuab tsis txhuam DC (BLDC) rau lub tshuab fais fab fais fab?
A: Yog, tab sis lub cev muaj zog yuav yog 2-2.5x hnyav dua li qhov sib npaug NdFeB. Rau EPS, qhov hnyav txo yog qhov tseem ceeb; Feem ntau siv N42SH lossis N48SH. Rau cov twj uas tsis yog lub tsheb fais fab (xws li, muaj hydraulics), ferrite tau txais.
Q: Dab tsi yog qhov tsawg kawg nkaus txiav txim kom muaj nuj nqis rau kev cai ferrite arc ntu?
A: Tooling nqi feem ntau yog 800-800-1500 ib tug tuag. Peb pom zoo MOQ ntawm 10,000 daim rau amortize tooling. Rau prototyping, peb tuaj yeem muab machined ferrite los ntawm cov txheej txheem txheem (lub sij hawm ua 2-3 lub lis piam).
Q: Puas yog cov hlau nplaum ferrite xav tau txheej txheej corrosion rau hauv qab - hood siv tsheb?
A: Tsis yog. Ferrite khoom yog ceramic (Fe2O3, SrO) thiab inherently corrosion-resistant. Txawm li cas los xij, yog tias cov hlau nplaum raug rau txoj kev ntsev tsuag ncaj qha (piv txwv li, lub log ceev sensor), peb pom zoo kom muaj parylene txheej ntawm 5-10μm rau kev tiv thaiv ntxiv.
