xov xwm

Peb siv cov ncuav qab zib los txhim kho koj cov kev paub dhau los.Los ntawm kev txuas ntxiv mus xauj lub vev xaib no, koj pom zoo rau peb siv cov ncuav qab zib.Ntau cov ntaub ntawv.
Cov inductors hauv automotive DC-DC converter daim ntawv thov yuav tsum tau ua tib zoo xaiv kom ua tiav kev sib xyaw ua ke ntawm tus nqi, zoo, thiab kev ua haujlwm hluav taws xob. offs tuaj yeem ua tau.
Muaj li ntawm 80 qhov sib txawv ntawm cov ntawv thov hluav taws xob hauv tsheb hluav taws xob, thiab txhua daim ntawv thov yuav tsum muaj nws tus kheej lub zog ruaj khov, uas yog muab los ntawm lub roj teeb voltage.Qhov no tuaj yeem ua tiav los ntawm qhov loj, lossy "linear" regulator, tab sis txoj kev siv tau zoo. "puas" lossis "pw-boost" hloov regulator, vim tias qhov no tuaj yeem ua tiav kev ua haujlwm thiab kev ua haujlwm ntau dua 90%. Compactness.Qhov no hom ntawm switching regulator yuav tsum tau ib tug inductor. Kev xaiv cov khoom raug cai tuaj yeem qee zaum zoo li tsis meej pem, vim hais tias cov kev suav yuav tsum tau tshwm sim nyob rau hauv lub xyoo pua 19th magnetic theory.Designers xav pom ib qho kev sib npaug uas lawv tuaj yeem "plug rau" lawv qhov kev ua tau zoo thiab tau txais qhov "tsim" inductance thiab kev ntsuas tam sim no. uas lawv tsuas tuaj yeem xaiv los ntawm cov khoom catalog.Txawm li cas los xij, tej yam tsis yooj yim li: qee qhov kev xav yuav tsum tau ua, qhov zoo thiab qhov tsis zoo yuav tsum tau ntsuas, thiab nws feem ntau yuav tsum muaj ntau yam qauv tsim.Txawm li cas los xij, qhov zoo meej yuav tsis muaj raws li cov qauv. thiab yuav tsum tau kho dua tshiab kom pom tias cov khoom siv hluav taws xob tsis zoo li cas.
Cia peb xav txog ib tug puck regulator (Daim duab 1), qhov twg Vin yog lub roj teeb voltage, Vout yog lub qis voltage processor fais fab rail, thiab SW1 thiab SW2 yog switched on thiab off alternately.Qhov yooj yim hloov muaj nuj nqi sib npaug yog Vout = Vin.Ton/ (Ton + Toff) qhov twg Ton yog tus nqi thaum SW1 raug kaw thiab Toff yog tus nqi thaum nws qhib.Nws tsis muaj inductance nyob rau hauv qhov sib npaug, yog li nws ua li cas? Hauv cov ntsiab lus yooj yim, lub inductor yuav tsum khaws lub zog txaus thaum SW1 tau qhib kom tso cai rau nws tswj cov zis thaum nws raug tua.Nws muaj peev xwm suav cov khoom siv hluav taws xob thiab sib npaug rau lub zog xav tau, tab sis muaj lwm yam uas yuav tsum tau xav txog ua ntej.Qhov kev hloov pauv ntawm SW1. thiab SW2 ua rau tam sim no nyob rau hauv inductor nce thiab poob, yog li tsim ib daim duab peb sab "ripple tam sim no" ntawm qhov nruab nrab DC tus nqi.Tom qab ntawd, cov ripple tam sim no ntws mus rau C1, thiab thaum SW1 raug kaw, C1 tso tawm. capacitor ESR yuav tsim cov zis voltage ripple.Yog tias qhov no yog qhov tseem ceeb, thiab lub capacitor thiab nws cov ESR raug kho los ntawm qhov loj lossis tus nqi, qhov no yuav teeb tsa tus nqi tam sim no thiab inductance.
Feem ntau qhov kev xaiv ntawm cov capacitors muab qhov yooj yim.Qhov no txhais tau hais tias yog tias ESR qis, qhov ripple tam sim no yuav siab.Txawm li cas los xij, qhov no ua rau nws tus kheej muaj teeb meem.Piv txwv li, yog tias "lub hav" ntawm lub ripple yog xoom nyob rau hauv qee lub teeb loads, thiab SW2 yog ib lub diode, nyob rau hauv ib txwm muaj xwm txheej, nws yuav tsum tsis txhob ua thaum lub sij hawm ib feem ntawm lub voj voog, thiab lub converter yuav nkag mus rau hauv lub "tsis txuas ntxiv conduction". Lub xeev khov kho.Modern buck converters feem ntau yog siv synchronous rectification, qhov twg SW2 yog MOSEFT thiab muaj peev xwm ua ntws tam sim no nyob rau hauv ob qho tib si kev taw qhia thaum nws yog qhib.Qhov no txhais tau hais tias lub inductor yuav viav vias tsis zoo thiab tswj tsis tu ncua conduction (Daim duab 2).
Nyob rau hauv cov ntaub ntawv no, lub ncov-rau-peak ripple tam sim no ΔI tuaj yeem tso cai kom siab dua, uas yog tsim los ntawm tus nqi inductance raws li ΔI = ET / LE yog qhov inductor voltage thov thaum lub sij hawm T. Thaum E yog qhov tso zis voltage , Nws yog qhov yooj yim tshaj plaws los txiav txim siab txog qhov tshwm sim ntawm lub sijhawm tig-tawm Toff ntawm SW1.ΔI yog qhov loj tshaj plaws ntawm qhov taw tes no vim tias Toff yog qhov loj tshaj plaws ntawm qhov siab tshaj plaws input voltage ntawm kev hloov pauv muaj nuj nqi.Piv txwv li: Rau lub roj teeb siab tshaj plaws ntawm 18 V, qhov tso zis ntawm 3.3 V, lub ncov-rau-peak ripple ntawm 1 A, thiab hloov zaus ntawm 500 kHz, L = 5.4 µH.Qhov no xav tias tsis muaj qhov hluav taws xob poob ntawm SW1 thiab SW2.Cov load tam sim no tsis yog xam nyob rau hauv no xam.
Kev tshawb fawb luv luv ntawm cov ntawv teev npe yuav nthuav tawm ntau qhov chaw uas nws qhov kev ntsuas tam sim no phim rau qhov yuav tsum tau ua.Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias tam sim no ripple yog superimposed ntawm tus nqi DC, uas txhais tau hais tias nyob rau hauv cov piv txwv saum toj no, lub inductor tam sim no yuav nco ntsoov. ntawm 0.5 A saum toj no lub load tam sim no.Muaj ntau txoj hauv kev los ntsuas qhov tam sim no ntawm inductor: raws li thermal saturation txwv los yog sib nqus saturation limit.Thermally txwv inductors feem ntau yog ntsuas rau qhov ntsuas kub, feem ntau 40 oC, thiab tuaj yeem ua tau. ua haujlwm ntawm cov dej ntws siab dua yog tias lawv tuaj yeem ua kom txias.Saturation yuav tsum zam ntawm qhov siab tshaj plaws tam sim no, thiab qhov txwv yuav txo qis nrog qhov kub thiab txias.Nws yog ib qho tsim nyog yuav tsum tau ua tib zoo xyuas cov ntaub ntawv inductance daim ntawv nkhaus los xyuas seb nws puas raug txwv los ntawm tshav kub lossis saturation.
Inductance poob kuj yog ib qho tseem ceeb rau kev txiav txim siab.Qhov kev poob yog feem ntau ohmic poob, uas tuaj yeem suav tau thaum lub ripple tam sim no qis.Thaum siab ripple theem, cov tseem ceeb poob pib dominate, thiab cov kev poob no nyob ntawm cov duab ntawm lub waveform thiab. zaus thiab qhov kub thiab txias, yog li nws yog qhov nyuaj rau kwv yees.Qhov kev sim ua tiav ntawm tus qauv, raws li qhov no yuav qhia tau tias qis dua ripple tam sim no yog tsim nyog rau qhov zoo tshaj plaws tag nrho efficiency.Qhov no yuav xav tau ntau inductance, thiab kab tias siab dua DC kuj-qhov no yog ib qho rov ua dua. txheej txheem.
TT Electronics 'kev ua tau zoo siab HA66 series yog qhov pib zoo (Daim duab 3).Nws qhov ntau muaj xws li 5.3 µH ib feem, qhov ntsuas saturation tam sim no ntawm 2.5 A, 2 A load tso cai, thiab ripple ntawm +/- 0.5 A. Cov khoom no zoo tagnrho rau kev siv tsheb thiab tau txais AECQ-200 ntawv pov thawj los ntawm lub tuam txhab nrog TS-16949 kev pom zoo zoo.
Cov ntaub ntawv no yog muab los ntawm cov ntaub ntawv muab los ntawm TT Electronics plc thiab tau raug tshuaj xyuas thiab hloov kho.
TT Electronics Co., Ltd. (2019, Lub Kaum Hli 29). Fais fab inductors rau automotive DC-DC applications.AZoM.Retrieved los ntawm https://www.azom.com/article.aspx?ArticleID=17140 nyob rau lub Kaum Ob Hlis 27, 2021.
TT Electronics Co., Ltd. "Power inductors rau automotive DC-DC daim ntaub ntawv".
TT Electronics Co., Ltd. "Power inductors rau automotive DC-DC applications".
TT Electronics Co., Ltd. 2019. Fais fab inductors rau automotive DC-DC applications.AZoM, saib rau lub Kaum Ob Hlis 27, 2021, https://www.azom.com/article.aspx?ArticleID=17140.
AZoM tau tham nrog xibfwb Andrea Fratalocchi los ntawm KAUST txog nws txoj kev tshawb fawb, uas tau tsom mus rau yav dhau los tsis paub txog cov thee.
AZoM tau tham nrog Dr. Oleg Panchenko nws txoj haujlwm hauv SPbPU Cov Khoom Siv Hluav Taws Xob thiab Cov Khoom Siv Hluav Taws Xob thiab lawv txoj haujlwm, uas yog lub hom phiaj los tsim ib lub teeb yuag tshiab uas siv cov aluminium alloy tshiab thiab kev sib txhuam do vuam tshuab.
X100-FT yog ib tug version ntawm X-100 universal kuaj tshuab customized rau fiber optic testing.Txawm li cas los xij, nws cov qauv tsim tso cai rau hloov mus rau lwm hom kev xeem.
MicroProf® DI optical deg soj ntsuam cov cuab yeej rau kev siv semiconductor tuaj yeem tshawb xyuas cov txheej txheem thiab tsis muaj txheej txheem wafers thoob plaws hauv kev tsim khoom.
StructureScan Mini XT yog cov cuab yeej zoo tshaj plaws rau kev kuaj xyuas pob zeb; nws tuaj yeem txheeb xyuas qhov tob thiab qhov chaw ntawm cov khoom siv hlau thiab cov khoom tsis yog hlau hauv cov pob zeb.
Kev tshawb fawb tshiab nyob rau hauv Tuam Tshoj Physics Letters tau tshawb xyuas cov superconductivity thiab them cov nthwv dej ntom ntom hauv ib txheej cov ntaub ntawv cog rau ntawm graphene substrates.
Kab lus no yuav tshawb txog ib txoj hauv kev tshiab uas ua rau nws muaj peev xwm tsim cov khoom siv nano nrog qhov tseeb tsawg dua 10 nm.
Tsab ntawv xov xwm no qhia txog kev npaj ntawm hluavtaws BCNTs los ntawm catalytic thermal chemical vapor deposition (CVD), uas ua rau kom ceev ceev hloov ntawm cov electrode thiab electrolyte.