1. Lub ntsiab lus thiab lub hauv paus ntsiab lus ntawm Ku
Cov hlau nplaum ntawm cov transformers thiab inductors feem ntau muaj thaj chaw qhov rai uas muaj rau winding, thiab qhov coefficient ntawm qhov rai siv Ku yog txhais tias yog qhov sib piv ntawm thaj chaw ua haujlwm tiag tiag ntawm cov hlau tooj liab (lossis txhuas) winding rau tag nrho thaj chaw ntawm qhov rai hlau nplaum. Qhia ua:
Ku = Ac/Aw, Ntawm lawv, Ac yog thaj tsam tag nrho ntawm cov xov hlau winding, thiab Aw yog thaj chaw ntawm lub qhov rais magnetic core. Yeej, Ku qhia txog qib kev siv ntawm qhov chaw magnetic core. Tus nqi Ku siab dua, cov xov hlau winding ntau dua tuaj yeem nyob hauv tib qhov chaw, uas tuaj yeem nqa cov hluav taws xob loj dua thiab txhim kho lub peev xwm ua haujlwm ntawm cov khoom siv electromagnetic.
Qhov kev sib raug zoo ntawm thaj chaw qhov rais thiab qhov winding tuaj yeem nkag siab zoo dua los ntawm daim duab hauv qab no:
2. Txoj kev xam lej Ku
Yuav kom xam Ku, nws yog ib qho tsim nyog los txiav txim siab cais tag nrho thaj tsam hla Ac ntawm cov xov hlau winding thiab thaj chaw qhov rai Aw ntawm lub hlau nplaum.
Kev Txiav Txim Siab: Qhov chaw ntawm lub qhov rais magnetic core Aw tuaj yeem tau los ntawm kev ntsuas qhov ntev thiab dav ntawm lub qhov rais magnetic core, thiab tom qab ntawd muab ob npaug. Rau cov qauv magnetic core txheem, qhov chaw ntawm lub qhov rais kuj tuaj yeem tau ncaj qha los ntawm phau ntawv qhia cov ntaub ntawv uas lub chaw tsim khoom magnetic core muab.
Kev Xam: Ua ntej, nws yog ib qho tsim nyog los qhia meej txog tus naj npawb ntawm kev tig N ntawm qhov winding thiab thaj tsam hla a ntawm ib txoj hlua. Thaj tsam hla a ntawm ib txoj hlua tuaj yeem suav tau siv cov mis cheeb tsam ncig a = π d2 / 4 raws li txoj kab uas hla ntawm txoj hlua d. Yog li tag nrho thaj tsam hla ntawm txoj hlua winding yog Ac = N * a. Piv txwv li, yog tias lub transformer siv lub qhov rais magnetic core loj ntawm 50mm ntev thiab 30mm dav, ces Aw = 50 * 30 = 1500mm2, kev tig winding yog 100, thiab txoj hlua nrog txoj kab uas hla ntawm 0.5mm raug xaiv. Thaj tsam hla ntawm ib txoj hlua yog a = π * 0.52 ≈ 0.196mm2, Ac = 100 * 0.196 = 19.6mm2, thiab Ku = 19.6 / 1500 ≈ 0.013
3. Cov yam tseem ceeb uas cuam tshuam rau Ku
a. Cov qauv winding
Txoj kev winding muaj qhov cuam tshuam loj rau Ku. Txoj kev winding ntau txheej zoo nkauj thiab raws li txoj cai tuaj yeem siv qhov chaw qhov rai zoo dua piv rau txoj kev xoob thiab random winding, yog li txhim kho tus nqi Ku. Piv txwv li, siv txoj kev sandwich winding (faib cov thawj winding ua ob ntu thiab sandwiching lub thib ob winding hauv nruab nrab) tsis tsuas yog tuaj yeem ua kom zoo dua qhov kev faib tawm ntawm lub zog magnetic, tab sis kuj txhim kho kev siv qhov chaw qhov rai rau qee qhov.
b. Cov khoom siv rwb thaiv tsev
Yuav kom ntseeg tau tias cov xov hluav taws xob rwb thaiv tsev ua haujlwm tau zoo, yuav tsum siv cov khoom siv rwb thaiv tsev xws li xim rwb thaiv tsev thiab daim kab xev rwb thaiv tsev. Txawm li cas los xij, cov khoom siv rwb thaiv tsev no yuav siv qee qhov chaw ntawm qhov rais. Cov khoom siv rwb thaiv tsev tuab dua, qhov chaw tsawg dua rau cov xov hlau, thiab tus nqi Ku yuav txo qis. Yog li ntawd, kev xaiv cov khoom siv rwb thaiv tsev nyias thiab ua tau zoo thaum ua tau raws li qhov yuav tsum tau ua rwb thaiv tsev yog ib txoj hauv kev zoo los txhim kho Ku.
c. Cov duab ntawm lub plawv hlau nplaum
Cov duab sib txawv ntawm cov hlau nplaum sib txawv muaj cov duab thiab qhov loj ntawm lub qhov rais sib txawv, uas kuj tseem tuaj yeem cuam tshuam rau Ku tus nqi. Piv txwv li, piv rau cov hlau nplaum toroidal, E-hom hlau nplaum muaj cov qhov rais ib txwm muaj ntau dua, ua rau nws yooj yim dua rau cua windings thiab muaj peev xwm ua tiav Ku tus nqi siab dua; Txawm hais tias cov hlau nplaum zoo li lub nplhaib muaj qhov zoo hauv kev tiv thaiv hluav taws xob thiab lwm yam, winding yog qhov nyuaj, thiab kev siv qhov chaw qhov rais yog qhov nyuaj heev. Kev txhim kho ntawm Ku tus nqi ntsib ntau yam teeb meem.
4. Qhov tseem ceeb ntawm Ku hauv kev tsim qauv siv tau
a. Txhim kho lub zog ceev
Nyob rau hauv qhov sib txawv ntawm miniaturization thiab lub teeb ntawm cov khoom siv hluav taws xob niaj hnub no, kev txhim kho lub zog ceev tau dhau los ua lub hom phiaj tseem ceeb. Los ntawm kev ua kom zoo dua Ku, thaj chaw hla ntawm cov xov hlau winding tuaj yeem nce ntxiv hauv qhov chaw txwv magnetic core qhov rai, tso cai rau cov hluav taws xob loj dua hla thiab txhim kho lub peev xwm ua haujlwm fais fab ntawm transformers thiab inductors. Ua li no, nrog tib lub ntim, lub cuab yeej tuaj yeem ua tiav cov zis hluav taws xob siab dua kom tau raws li qhov xav tau hluav taws xob nce ntxiv.
b. Txo cov nqi
Kev nce Ku kom tsim nyog txhais tau tias tib lub zog xa mus tau ua tiav yam tsis tau nce qhov loj ntawm lub hlau nplaum. Qhov no txo qhov kev xav tau rau cov hlau nplaum loj dua thiab txo tus nqi ntawm cov hlau nplaum. Lub caij no, kev siv qhov rai zoo kuj tseem yuav txo qhov pov tseg ntawm cov ntaub ntawv winding, ntxiv txuag cov nqi. Yog li ntawd, kev ua kom zoo dua Ku yog ib txoj hauv kev tseem ceeb ntawm kev sib npaug ntawm kev ua tau zoo thiab tus nqi.
c. Txhim kho kev ua haujlwm ntawm cua sov
Thaum Ku qis, qhov winding raug faib tsis sib xws hauv lub qhov rais, uas yuav ua rau muaj kev faib tawm ntawm lub zog sib nqus tsis sib xws thiab qhov kub hauv zos. Kev ua kom zoo dua Ku thiab sau qhov chaw ntawm lub qhov rais kom tsim nyog hauv qhov winding tuaj yeem pab txhim kho kev faib tawm ntawm lub zog sib nqus, txo qhov tsis kam AC ntawm qhov winding, txo qhov poob ntawm qhov winding, yog li ua kom muaj kev ua haujlwm ntawm kev tshem tawm cua sov thiab ua kom ruaj khov ntawm cov khoom siv.
5. Cov Txheej Txheem thiab Kev Xyaum Ua Kom Ku Zoo Dua
a. Kev siv cov thev naus laus zis siab heev
Los ntawm kev siv cov khoom siv siab heev xws li cov tshuab winding tsis siv neeg, kev winding kom meej dua thiab me dua tuaj yeem ua tiav, zam cov teeb meem ntawm kev xoob thiab tsis sib xws uas yuav tshwm sim thaum lub sijhawm winding tes, thiab txhim kho kev siv qhov chaw qhov rai zoo. Tib lub sijhawm, qee cov txheej txheem winding tshwj xeeb, xws li segmented winding thiab staggered winding, kuj tseem tuaj yeem ua kom zoo dua qhov layout winding thiab txhim kho Ku raws li cov kev xav tau tsim tshwj xeeb.
b. Xaiv cov xov hlau thiab cov ntaub ntawv rwb thaiv tsev uas tsim nyog
Los ntawm kev siv cov xov hlau conductivity siab, cov xov hlau nyias dua tuaj yeem siv rau hauv qab tib lub peev xwm nqa tam sim no los npaj ntau qhov tig ntawm cov xov hlau hauv lub qhov rais thiab nce Ac. Tib lub sijhawm, cov ntaub ntawv rwb thaiv tsev tshiab xws li cov yeeb yaj kiab rwb thaiv tsev nano raug xaiv los xyuas kom meej tias kev ua haujlwm rwb thaiv tsev thaum txo qhov chaw uas cov ntaub ntawv rwb thaiv tsev nyob thiab txhim kho Ku.
c. Kev tsim qauv zoo tshaj plaws ntawm lub plawv sib nqus
Xaiv cov hlau nplaum uas muaj cov duab thiab qhov loj me raws li cov xwm txheej siv thiab cov kev cai ua haujlwm. Rau qee qhov kev tsim qauv nrog cov kev xav tau Ku siab, cov hlau nplaum uas tsis yog tus qauv tuaj yeem txiav txim siab los ua kom zoo dua cov duab thiab qhov loj me ntawm lub qhov rais hlau nplaum kom ua tiav qhov zoo tshaj plaws ntawm kev siv lub qhov rais.
Tus coefficient siv qhov rai Ku khiav thoob plaws hauv cov txheej txheem ntawm kev tsim transformer thiab inductor, cuam tshuam rau kev ua tau zoo, tus nqi, thiab kev ntseeg siab ntawm cov khoom siv electromagnetic. Los ntawm kev nkag siab tob txog lub hauv paus ntsiab lus ntawm Ku, xam nws cov nqi kom raug, tshuaj xyuas cov yam ntxwv cuam tshuam, thiab siv cov txheej txheem kev ua kom zoo dua, nws muaj peev xwm tsim cov transformers thiab inductors nrog kev ua tau zoo dua thiab tus nqi qis dua, txhawb kev txhim kho tas mus li ntawm cov thev naus laus zis hluav taws xob.
Lub sijhawm tshaj tawm: Lub Rau Hli-24-2025
