Core of Sib Nqus Cores: Thickness, Frequency & Permeability

1. Ribbon Thickness: txiav txim siab kub ua hauj, tseem ceeb rau siab

Ntau zaus

Sib nqus cores feem ntau yog laminated los yog qhov txhab los ntawm nyias nyias ribbons. Txawm hais tias thickness zoo li tsis tseem ceeb, nws tseem ceeb heev raueddy tam sim no poob-ib qho ntawm cov laj thawj tseem ceeb ntawm cov tub ntxhais cua sov, tshwj xeeb tshaj yog nyob rau hauv high zaus. Thickness ncaj qha txiav txim seb cov tub ntxhais yuav overheat thiab ua tsis tiav.

Txoj Cai Core

Qhov thinner lub ribbon, qhov qis dua qhov poob tam sim no thiab qhov zoo dua qhov kev ua haujlwm siab - zaus, tab sis tus nqi siab dua.

Kev piav qhia yooj yim

Thaum tam sim no dhau los ntawm lub hauv paus,eddy dej ntws(me me nyob rau hauv tam sim no) yog generated. Cov dej ntws loj dua ua rau muaj cua sov hnyav dua. Thinner ribbons txo qhov loj thiab lengthen txoj kev ntawm eddy tam sim no loops, zoo heev txo eddy tam sim no poob.

Ib txoj cai tseem ceeb:

• Eddy tam sim no poob yog proportional rau lub square ntawmribbontuab.

Doubling lub thickness nce eddy tam sim no poob los ntawm ib qho tseem ceeb ntawm 4.

Piv txwv

• Lub zog zaus (50Hz): xws li . 220V transformers, industrial motors.

Feem ntau siv strips: 0.35mm, 0.27mm grain -oriented silicon steel.

Nruab nrab tuab tsis txhob muaj cua sov ntau thaum tswj tus nqi.

• High zaus (50kHz-200kHz): xws li xov tooj chargers, hloov cov khoom siv fais fab.

Yuav tsum siv ultra-thin amorphous lossis nanocrystalline ribbons ntawm20–30μm.

Ib tug raug 65W ceev charger siv 25μm nanocrystalline ribbon los suppress siab - zaus eddy tam sim no poob. Siv 0.35mm silicon steel yuav ua rau kub kub ceev, tiv thaiv overheating, los yog tsis ua hauj lwm.

• Qhov tsis zoo

Thinner ribbons ua rau muaj teeb meem kev tsim khoom thiab kev sib tshuam -txheej txheej, txo cov hlau nplaum sib nqus zoo - ntu ntu. Qhov no tej zaum yuav xav tau lub ntim loj dua thiab tus nqi ntau dua.

2. Kev khiav hauj lwm zaus: txhais cov tub ntxhais ua haujlwm txwv

Zaus yog lub neej ntawm cov hlau nplaum. Kev ua tau zoo hloov pauv ntau zaus ntawm ntau zaus. Feem ntau qhov kev xaiv tsis ua tiav yog los ntawm qhov tsis sib haum xeeb thiab cov khoom tseem ceeb.

Txoj Cai Core

Ntau zaus → ntau dua cov tub ntxhais poob → kev ua haujlwm tsis muaj zog → xav tau kev sib txuam tshwj xeeb.

Peb Qhov Teebmeem Loj ntawm Kev Siv Siab

Nce cua sov

• Tag nrho cov tub ntxhais poob (hysteresis poob + eddy tam sim no poob) nce nrog zaus:
• Hysteresis poob ∝ zaus
• Eddy tam sim no poob ∝ zaus²
• Doubling zaus ua rau exponential poob kev loj hlob, overheating, thiab kev poob qis heev.

Txo cov permeability zoo

• Ntawm cov zaus siab, cov sib nqus sib nqus tsis tuaj yeem ua raws li kev hloov pauv, yog li kev ua tau zoo permeability txo. Qhov loj dua excitation tam sim no yuav tsum tau tsim kom muaj magnetic teb txaus.

Derated ua haujlwm yuav tsum tau

• Txhawm rau tswj qhov kub nce, qhov ua haujlwm flux ceev yuav tsum raug txo.
• Fais fab- zaus transformers: ~1.5T
• Siab - zaus hloov khoom siv: tsuas yog 0.2–0.5T
• Overdriving hwj chim yam tsis tau kho flux ceev los yog strip thickness ua rau tam sim ntawd overheating thiab burnout.

3. Sib nqus Permeability (μ): Txiav Field-Kev Ua Haujlwm Zoo

Permeability yog qhov ntsuas tseem ceeb ntawm cov khoom siv hlau nplaum, ntsuas seb cov tub ntxhais ua tau yooj yim npaum li cas thiab tsim kom muaj qhov sib nqus. Nws ncaj qha cuam tshuam tsis muaj -load poob thiab kev ua haujlwm ntawm thaj chaw.

Txoj Cai Core

Ntau dua permeability → yooj yim kev lag luam → poob qis, tab sis yuav tsum phim zaus.

Plaub Yam Tseem Ceeb

Tsawg excitation tam sim no

• Ntau dua permeability txo qhov yuav tsum tau muaj zog magnetomotive (excitation tam sim no × lem), txo qis tsis muaj -load poob thiab txhim kho efficiency.
• Piv txwv li, ntawm -board transformers hauv lub tsheb fais fab siv siab -permeability nanocrystalline cores (μ=10⁵–10⁶), txiav tsis muaj- load poob ntau dua 60%.

Tsawg hysteresis poob

• High - cov ntaub ntawv permeability (nanocrystalline, permalloy) muaj kev coercivity qis thiab nqaim hysteresis loops, txo hysteresis poob.

Kev siv qhov chaw siab dua

• Cov permeability siab dua ua tiav cov flux ceev dua nrog tib lub winding, tso cai rau cov tub ntxhais me me thiab tsim ntau dua.

Ceeb toom tseem ceeb

• High permeability ≠ universal kev ua tau zoo.
• Cov pa siab siab - cov ntaub ntawv permeability tsis zoo siab -frequency stability thiab poob siab ntawm cov zaus siab.
• Rau siab - siv zaus:

Nanocrystalline > Amorphous > Grain -oriented silicon steel

• (Rau GHz ultra- siab zaus: ferrite yog nyiam.)

4. Coupling Logic: Cov Ntsiab Cai Xaiv Cov Tswv Yim

In kev siv tiag tiag, peb qhov kev txwv yuav tsum raug muab sib npaug.

01 Siab- cov ntawv thov zaus (ntaus ntawm kHz rau MHz)

• Sivultra- nyias strip + siab- zaus- cov khoom ruaj khov permeability
• Nyias strip suppresses eddy tam sim no poob; ruaj khov permeability them nyiaj rau siab - zaus poob.
• Piv txwv li: ceev chargers, siab - zaus telecom transformers, 5G base chaw nres tsheb transformers.

02 Tsawg- zaus / lub zog- zaus (50Hz–1kHz)

• Siv cov ntaub tuab tuab + cov khoom nruab nrab permeability
• Thickness muaj me ntsis cuam tshuam rau eddy tam sim no poob; sib npaug kev ua haujlwm thiab tus nqi.
• Piv txwv li: faib transformers, motors rau cov khoom siv hauv tsev. 03 Thickness–frequency matching

03 Thickness – zaus sib piv

• Fais fab zaus: 0.35mm
• Nruab nrab zaus (1-10kHz): ~ 0.2mm
• High zaus (Ntau dua lossis sib npaug rau 20kHz): micron-theem ultra- nyias strip

5. Cov ntsiab lus ceev

Sawb thickness

Nyias=zoo rau siab zaus, poob qis, tus nqi siab

Thick=zoo rau lub zog zaus, tus nqi qis, overheats ntawm lub siab zaus

Ua haujlwm zaus

Siab=siab poob, qis permeability, yuav tsum tau thinner strip thiab qis flux ceev

Tsawg=poob qis, tsawg nruj thickness yuav tsum tau

Sib nqus permeability

Siab=yooj yim magnetization, tsawg poob, tab sis nyob ntawm zaus stability

High- cov ntawv thov zaus xav tau cov khoom tshwj xeeb siab -permeability

Hauv luv luv:Thickness tswj eddy tam sim no, zaus teev txwv, permeability txhim kho efficiency.

Nrog rau cov ntsiab lus tseem ceeb no, koj tuaj yeem zam qhov yuam kev feem ntau hauv kev xaiv tub ntxhais.