Dab tsi yog qhov nqus coefficient ntawm zaj duab xis capacitors hais txog dab tsi?Puas yog qhov me me, qhov zoo dua?

Ua ntej qhia txog qhov nqus coefficient ntawm zaj duab xis capacitor, cia peb saib seb dab tsi yog dielectric, polarization ntawm dielectric thiab qhov tshwm sim ntawm qhov nqus ntawm lub capacitor.

Dielectric

Ib tug dielectric yog ib yam khoom uas tsis yog-conductive, piv txwv li, ib tug insulator, uas tsis muaj tus nqi sab hauv uas yuav txav tau.Yog hais tias ib tug dielectric muab tso rau hauv ib tug electrostatic teb, cov electrons thiab nuclei ntawm dielectric atoms ua "microscopic txheeb ze hloov chaw" nyob rau hauv lub atomic ntau yam. nyob rau hauv qhov kev txiav txim ntawm lub zog hluav taws xob, tab sis tsis yog "macroscopic txav" deb ntawm lub atom uas lawv koom, zoo li cov hluav taws xob dawb hauv ib tus neeg xyuas pib.Thaum lub electrostatic equilibrium mus txog, lub zog teb nyob rau hauv lub dielectric tsis yog xoom.Qhov no yog lub ntsiab sib txawv ntawm cov khoom hluav taws xob ntawm dielectrics thiab conductors.

Dielectric polarization

Nyob rau hauv qhov kev txiav txim ntawm daim ntawv thov hluav taws xob, lub sij hawm macroscopic dipole tshwm nyob rau hauv lub dielectric raws li qhov hluav taws xob kev taw qhia, thiab ib tug bound nqi tshwm rau ntawm dielectric nto, uas yog lub polarization ntawm dielectric.

Lub absorption phenomenon

Lub sij hawm lag phenomenon nyob rau hauv lub them thiab tawm cov txheej txheem ntawm capacitor tshwm sim los ntawm qeeb polarization ntawm dielectric nyob rau hauv qhov kev txiav txim ntawm daim ntawv thov hluav taws xob teb.Kev nkag siab zoo yog tias lub capacitor yuav tsum tau them tag nrho tam sim ntawd, tab sis nws tsis tau sau tam sim;lub capacitor yuav tsum tau tso cov nqi tag nrho, tab sis nws tsis tso tawm, thiab lub sij hawm lag tshwm sim tshwm sim.

Absorption coefficient ntawm zaj duab xis capacitor

Tus nqi siv los piav txog qhov tshwm sim ntawm dielectric absorption tshwm sim ntawm zaj duab xis capacitors yog hu ua absorption coefficient, thiab raug xa mus rau Ka.Cov nyhuv dielectric absorption ntawm zaj duab xis capacitors txiav txim siab qhov tsawg zaus tus yam ntxwv ntawm capacitors, thiab tus nqi Ka txawv heev rau txawv dielectric capacitors.Cov txiaj ntsig kev ntsuas sib txawv rau qhov sib txawv ntawm qhov ntsuas lub sijhawm ntawm tib lub capacitor;tus nqi Ka kuj txawv rau cov capacitors ntawm tib lub specification, txawv manufacturers, thiab txawv batches.

Yog li tam sim no muaj ob lo lus nug -

Q1.Puas yog qhov nqus coefficient ntawm zaj duab xis capacitors me npaum li sai tau?

Q2.Dab tsi yog qhov cuam tshuam loj ntawm kev nqus coefficient?

A1:

Nyob rau hauv qhov kev txiav txim ntawm daim ntawv thov hluav taws xob: qhov me me Ka (qhov me me nqus coefficient) → qhov tsis muaj zog ntawm polarization ntawm dielectric (xws li insulator) → qis dua qhov khi quab yuam ntawm lub dielectric nto → qhov me me ntawm kev sib khi quab yuam ntawm dielectric ntawm tus nqi traction → qhov tsis muaj zog ntawm qhov nqus dej ntawm lub capacitor → lub capacitor nqi thiab tawm sai dua.Lub xeev zoo tshaj plaws: Ka yog 0, piv txwv li kev nqus coefficient yog 0, lub dielectric (xws li insulator) tsis muaj polarization tshwm sim nyob rau hauv qhov kev txiav txim ntawm daim ntawv thov hluav taws xob, lub dielectric nto tsis muaj traction binding quab yuam ntawm tus nqi, thiab tus nqi capacitor thiab tawm teb. tsis muaj hysteresis.Yog li ntawd, qhov nqus coefficient ntawm zaj duab xis capacitor yog qhov me dua qhov zoo dua.

A2:

Cov nyhuv ntawm ib tug capacitor nrog ib tug loj heev tus nqi Ka ntawm txawv circuits manifests nws tus kheej nyob rau hauv ntau hom, raws li nram no.

1) Cov kab sib txawv ua ke ua ke sib txuas

2) Sawtooth Circuit Court ua kom rov qab los ntawm sawtooth nthwv dej, thiab yog li lub voj voog tsis tuaj yeem rov qab sai

3) Limiters, clamps, nqaim mem tes tso zis waveform distortion

4) Lub sij hawm tas mus li ntawm ultra-tsawg zaus smoothing lim ua loj

(5) DC amplifier xoom point yog cuam tshuam, ib txoj kev drift

6) Qhov tseeb ntawm qhov piv txwv thiab tuav Circuit Court txo qis

7) Drift ntawm DC qhov chaw ua haujlwm ntawm linear amplifier

8) Ntau zog ripple nyob rau hauv lub hwj chim mov Circuit Court

Tag nrho cov saum toj no kev ua tau zoo ntawm dielectric absorption nyhuv yog inseparable los ntawm lub ntsiab ntawm lub capacitor "inertia", uas yog, nyob rau hauv lub sij hawm teev nqi them tsis tau them rau tus nqi uas yuav tsum tau, thiab vice versa tso tawm kuj yog qhov teeb meem.

Lub rwb thaiv tsev tsis kam (los yog to tam sim no) ntawm lub capacitor nrog tus nqi Ka loj dua yog qhov sib txawv ntawm qhov zoo tshaj plaws capacitor (Ka = 0) nyob rau hauv uas nws nce nrog lub sij hawm ntev dua (kua tam sim no txo).Lub sijhawm xeem tam sim no tau teev tseg hauv Suav teb yog ib feeb.