Tus kheej inductance

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Tus kheej inductance

Lub electromagnetic induction tshwm sim los ntawm kev hloov ntawm tus neeg xyuas pib tam sim no hu ua tus kheej induction.

Thaum cov tam sim no nyob rau hauv tus neeg xyuas pib hloov, lub magnetic teb nyob ib ncig ntawm nws hloov nrog nws, thiab cov magnetic flux hloov raws li, yog li induced electromotive quab yuam yog generated nyob rau hauv tus neeg xyuas pib, uas ib txwm cuam tshuam qhov kev hloov ntawm tus thawj tam sim no nyob rau hauv tus neeg xyuas pib, uas yog. , tus kheej induced electromotive quab yuam. Qhov tshwm sim no hu ua self induction.

Kev suav tus kheej inductance

Tus naj npawb ntawm flux tig

Nyob rau hauv lub tam sim no nqa coil, lub magnetic teb zoo siab los ntawm tam sim no nqa coil yog ncaj qha proportional rau nws tam sim no kuv, thiab tus naj npawb ntawm flux tig los ntawm lub kauj ψ (thaum lub kauj yog ntau tig, cov sum ntawm cov flux dhau los ntawm txhua tig. yog hu ua tus naj npawb ntawm flux lem ψ, yog tias cov flux dhau los ntawm txhua qhov tig yog tib yam, ces ψ=n Φ, n yog tus lej ntawm cov kauj) kuj ncaj qha proportional rau kuv, uas yog, ψ=Li=n Φ.

Tus kheej inductance coefficient

Qhov piv coefficient L nyob rau hauv ob lub qauv saum toj no yog ywj siab ntawm qhov tam sim no, thiab nyob ntawm qhov loj, zoo, tus naj npawb ntawm cov lem ntawm lub kauj thiab permeability ntawm ib puag ncig (tshwj xeeb tshaj yog sab hauv ntawm lub kauj) magnetic nruab nrab (yog tias nws yog ferromagnetic. , l kuj muaj feem xyuam rau tam sim no kuv). Rau tib qhov kev hloov pauv tam sim no, qhov ntau dua L yog, ntau dua tus kheej Induction EMF yog, uas yog, qhov muaj zog ntawm tus kheej induction nyhuv yog. L yog hu ua tus kheej induction coefficient, uas yog hu ua tus kheej induction lossis inductance luv luv. Chav tsev yog Henry (H). Yog hais tias tus kheej induction electromotive quab yuam generated thaum tam sim no dhau los ntawm lub kauj hloov 1 ampere hauv 1 thib ob, tus kheej induction coefficient ntawm kauj yog 1 Heng. Cov chav me me uas nquag siv yog millihene (MH) thiab microhene (μ h) Kev suav ntawm tus kheej induction coefficient yog qhov nyuaj heev. Nws feem ntau yog ntsuas los ntawm txoj kev sim. Hauv qhov yooj yim, nws tuaj yeem suav los ntawm Bi SA La txoj cai thiab ψ=Li.

L=ψ / I, tus kheej induction coefficient nyob ntawm qhov xwm txheej ntawm lub voj. Tus kheej induction coefficient ntawm ntev ncaj kauv raj yog L=u * N2 * v

1H=1000mH=1000000μH

Self induction magnetic zog

Self induced magnetic zog: w (m)=0.5li2

Tus kheej induction voltage

Tus kheej induced electromotive quab yuam E=n Δ Φ / Δ t=l Δ I / Δ t

L: tus kheej induction coefficient (H) (coil L nrog cov tub ntxhais hlau loj dua qhov uas tsis muaj cov tub ntxhais hlau)

Δ I: hloov tam sim no

△ T: lub sijhawm siv

Δ I / Δ T: hloov tus nqi ntawm tus kheej induced tam sim no (hloov ceev).