{{01. cov ntsiab lus thiab cov txheej txheem ntawm dielectric tas li (ε)
Dielectric tas li yog lub cev kom muaj nuj nqis ntawm cov khoom siv hluav taws xob, tab sis yog ib qho ntawm cov khoom siv hluav taws xob, thiab yog ib qho ntawm cov khoom siv hluav taws xob zoo li muaj qhov tsis tshua muaj zog los txo cov paib teeb thiab Kev cuam tshuam .
(1) Cov Lus Txhais ntawm Dielectric tas li
Tus dielectric tas li (txheeb ze dielectric tas li, εᵣ) yog qhov piv ntawm cov khoom siv dielectric tas li (ε) mus rau nws lub tshuab nqus tsev tas mus li (ε₀):
εᵣ=ε/ε₀
Ntawm lawv, ε₀ yog lub tshuab nqus tsev tag nrho, uas yog kwv yees li8.854 × 10-12F / m (Farad / m).
Cov txheeb ze dielectric tas li (εᵣ) yog qhov seem dimensionless ntawm lub cev {, thiab}}}}}} (xws li ETFE's εᵣ ntawm hais txog 2.6).
(2) mis rau kev sib raug zoo nrog capacitance
Rau cov phaj parallel capacitors, kev sib txheeb ntawm capacitance (c) thiab dielectric tas li yog:C=εᵣ⋅ε₀⋅A/d
Ntawm lawv, A yog thaj tsam ntawm electrode phaj, thiab d yog qhov deb ntawm cov phaj hluav taws xob (rwb thaiv tsev cov khoom tuab).
Cov mis no qhia tau tias nyob rau hauv tib tus qauv, cov loj dua cov khoom siv lub peev xwm khaws cov nqi .
(3) Poob ntsig txog: dielectric poob tangent (tan Δ)
Dielectric tsis yog lub zog poob ntawm cov ntaub ntawv insulating vim yog cov khoom siv hluav taws xob he {}}} Δ}) thiab muaj feem xyuam rau dielectric tas li raws li nram no:TanΔ=ε / ε '
Ntawm lawv, ε 'yog ib feem ntawm dielectric tas li (sawv cev rau lub zog cia muaj peev xwm), thiab ε' 'yog qhov kev xav (sawv cev poob).
Qhov me dua tan Δ, cov me dua cov rwb thaiv tsev poob ntawm cov khoom siv, thiab ntau dua li etfe tan 00}}}}}} 00} 003, uas belongs rau cov khoom poob qis).
{{02. Qhov tseem ceeb thiab hloov dua siab tshiab ntawm rwb thaiv tsev ua haujlwm
Cov ntsiab lus tseem ceeb ntawm rwb thaiv tsev rwb thaiv tsev suav nrog cov khoom siv rwb thaiv tsev thiab muaj peev xwm daws tau cov ntaub ntawv rwb thaiv tsev, thiab qee yam kev sim tuaj yeem cuam tshuam nrog kev sim lossis kev sim ua kom pom tseeb, thiab qee qhov kev sim tuaj yeem cuam tshuam nrog kev sim lossis kev sim ua kom pom tseeb
(1) rwb thaiv tsev tsis kam (rqub)
Rwb thaiv tsev tsis kam yog lub peev xwm los tiv thaiv cov tod tam sim no, ntsuas hauv Ohms (ω), thiab muaj feem xyuam rau cov khoom siv tiv thaiv (ρ) raws li hauv qab no:Rqub=ρ⋅d/A
Ntawm lawv, ρ yog lub ntim resistivity (chav tsev: · m), d yog rwb thaiv tsev tuab, thiab yog thaj chaw zoo tshaj plaws {}}
Hloov dua siab tshiab lub ntsiab lus: qhov ntau dua resistivity, thiab zoo tshaj li etfulity feem ntau feem ntau yog cov ntaub ntawv ntawm cov ntaub ntawv rwb thaiv tsev) .
(2) lub zog tawg (eᵦ)
Lub zog rhuav tshem yog lub zog hluav taws xob tseem ceeb ntawm cov khoom siv hluav taws xob tsis tau tawg, ntsuas hauv Killimeter), thiab xam siv cov qauv hauv qab no:Eb=Ub/d
Ntawm lawv, Uᵦ yog qhov tawg voltage (KV), thiab d yog rwb thaiv tsev tuab (hli) .
Kev hloov dua siab tshiab lub ntsiab lus: lub siab dua lub zog, qhov ntau dua cov khoom siv tau los ua kom tau raws li cov ntaub ntawv tuab (piv txwv li, lub zog ua kom tau los ua kom tau raws li cov kev xav tau ntawm 600v voltage).
(3) Kev sib txuam ntawm dielectric tas li thiab kev tshaj tawm kis tau ploj
Hauv kev sib kis taucoog siab tshaj tawm, teeb meem tsis sib haum (εᵣ) thiab dielcical mis yog: ∝f⋅√εr⋅tanδδ
Ntawm lawv, f yog lub teeb liab zaus .
Kev hloov dua siab tshiab: Tsawg tan δ thiab tsis muaj qhov ntsuas hluav taws xob uas muaj haum rau cov khoom siv hluav taws xob qib siab (xws li aerospace thiab precision hauv tshuab hluav taws xob).
3. Ua piv txwv ntawm kev ua haujlwm hloov dua siab tshiab hauv kev siv cov ntawv thov (noj ulm 10126 hlau ua piv txwv)
Ul awm 10126 hlau Adopts Etfulation Etaib (εᵣ≈2.6, Tan≈≈0.003, Kev Ua Haujlwm Zoo ntawm 150 Degree, Rwb Thaiv Tsev Kev Ua Haujlwm Hloov Siab yog raws li hauv qab no:
(1) Cov ntaub ntawv pov thawj ntawm kev rhuav tshem voltage: Yog tias rwb thaiv tsev tuab yog 0.1mm, theoretical tawgUb=Eb⋅d =25 kv / hli × 0.1mm=2.5 kv, Feeb siab dua li cov rated 600V, nrog rau kev nyab xeeb kev nyab xeeb rau kev nyab xeeb .
(2) Qhov kev kwv yees siab tsis dhau
(3) rwb thaiv tsev tsis kam hloov dua siab tshiab: yog thaj tsam ntawm tus thawj coj yog 10cm², rwb thaiv tsev tuab yog 0.1mm, thiab Etfe'sρ≈10¹⁷Ω·m, ces lub rwb thaiv tsev tsis kamRqub=1017×0.0001/0.001=1016Ω, cov xau dej tam sim no tuaj yeem tsis quav ntsej .
4. Cov Lus Qhia
Lub dielectric tas li yog qhov taw qhia tseem ceeb ntawm lub zog cia khoom ntawm cov ntaub ntawv insulating thiab poob ncaj qha rau kev ua kom muaj zog thiab tsis tshua muaj kev poob siab thiab qis}
Cov kev ua tau zoo ntawm rwb thaiv tsev kev ua tau zoo tuaj yeem ntsuas qhov kev siv tshuaj ntawm cov qauv ntawm kev ua haujlwm xws li kev tiv thaiv, muaj lub zog tawg, thiab poob (xws li poobUl awm 10126 hlau, uas yog haum rau 600v cov khoom sib txuas hauv cov chaw sib txuas thiab cov kev kub-ib puag ncig vim nws cov qes εᵣ thiab siab dua lub zog).
Kev hloov pauv ntawm cov tsis muaj kev tshawb fawb txog kev xaiv xaim thiab qhov chaw ua kom zoo li no xws li voltage thiab kub.
