Yintoni i-coefficient yokufunxa yefilimu capacitors ibhekisa kuyo?Ngaba incinci, ingcono?

Ngaphambi kokwazisa i-coefficient yokufunxa ye-capacitors yefilimu, makhe sijonge ukuba yintoni i-dielectric, i-polarization ye-dielectric kunye ne-absorption phenomenon ye-capacitor.

Idielectric

I-dielectric yinto engaqhubekiyo, oko kukuthi, i-insulator, engenawo umrhumo wangaphakathi onokuhamba.Ukuba i-dielectric ibekwe kwindawo ye-electrostatic, i-electron kunye ne-nuclei ye-athomu ye-dielectric yenza "i-microscopic related displacement" ngaphakathi koluhlu lwe-athomu. phantsi kwesenzo samandla ombane, kodwa hayi "intshukumo ye-macroscopic" kude ne-athomu ezikuyo, njengee-electron zasimahla kwi-conductor.Xa i-equilibrium ye-electrostatic ifikelelwe, amandla entsimi ngaphakathi kwe-dielectric ayikho i-zero.Lo ngumahluko ophambili phakathi kweempawu zombane ze-dielectrics kunye nabaqhubi.

I-polarization ye-dielectric

Ngaphantsi kwesenzo sommandla wombane osetyenzisiweyo, umzuzu we-dielectric we-macroscopic ubonakala ngaphakathi kwe-dielectric ecaleni kwendlela yombane, kwaye intlawulo eboshiweyo ibonakala kwi-dielectric surface, eyi-polarization ye-dielectric.

Isenzeko sokufunxa

ixesha le-lag phenomenon kwinkqubo yokutshaja kunye nokukhupha i-capacitor ebangelwa yi-polarization epholileyo ye-dielectric phantsi kwesenzo sentsimi yombane esetyenzisiweyo.Ukuqonda okuqhelekileyo kukuba i-capacitor iyadingeka ukuba ihlawuliswe ngokupheleleyo ngokukhawuleza, kodwa ayigcwaliswa ngokukhawuleza;i-capacitor iyadingeka ukukhulula umrhumo ngokupheleleyo, kodwa ayikhululwa, kwaye i-time lag phenomenon iyenzeka.

I-coefficient yokufunxa yefilimu capacitor

Ixabiso elisetyenziselwa ukuchaza i-dielectric absorption phenomenon ye-film capacitors ibizwa ngokuba yi-absorption coefficient, kwaye ibhekiswa nguKa.Impembelelo ye-dielectric absorption ye-film capacitors inquma iimpawu eziphantsi ze-frequency ze-capacitors, kwaye ixabiso le-Ka lihluka kakhulu kwii-dielectric capacitors ezahlukeneyo.Iziphumo zokulinganisa ziyahluka kwiimvavanyo ezahlukeneyo zexesha le-capacitor efanayo;ixabiso le-Ka likwahluka kwii-capacitors zenkcazo efanayo, abavelisi abahlukeneyo, kunye neebhetshi ezahlukeneyo.

Ngoko kukho imibuzo emibini ngoku-

Q1.Ngaba i-coefficient ye-absorption ye-film capacitors incinci kangangoko kunokwenzeka?

Q2.Yeyiphi imiphumo emibi ye-coefficient yokufunxa enkulu?

A1:

Phantsi kwentshukumo yendawo yombane esetyenzisiweyo: iKa encinci (i-coefficient yokufunxa encinci) → ibuthathaka i-polarization ye-dielectric (oko kukuthi isigqubuthelo) → isezantsi amandla okubopha kumphezulu wedielectric → incinci amandla okubopha wedielectric ekutsaleni kwentlawulo. → buthathaka isenzeko sokufunxa kwe-capacitor → i-capacitor ihlawulisa kwaye ikhuphe ngokukhawuleza.Imeko efanelekileyo: I-Ka yi-0, oko kukuthi i-coefficient yokufunxa yi-0, i-dielectric (okt insulator) ayinayo i-polarization phenomenon phantsi kwesenzo sendawo yombane esetyenzisiweyo, umgangatho we-dielectric awunawo amandla okubopha kwintlawulo, kunye nentlawulo ye-capacitor kunye nempendulo yokukhupha. ayinayo i-hysteresis.Ngoko ke, i-coefficient yokufunxa ye-capacitor yefilimu yinto encinci engcono.

A2:

Umphumo we-capacitor enexabiso elikhulu kakhulu le-Ka kwiisekethe ezahlukeneyo zizibonakalisa ngeendlela ezahlukeneyo, ngolu hlobo lulandelayo.

1) Iisekethe ezahlukileyo ziba ziisekethe ezidityanisiweyo

2) Isekethe yeSawtooth ivelisa imbuyekezo eyandisiweyo ye-sawtooth wave, kwaye ke isekethe ayinakubuyela ngokukhawuleza.

3) Imida, i-clamps, imxinwa ye-pulse output waveform distortion

4) Ixesha eliguquguqukayo le-ultra-low frequency smoothing filter iba nkulu

(5) I-DC yeamplifier zero point iphazamisekile, i-drift yendlela enye

6) Ukuchaneka kwesampulu kunye nokubamba isekethe kuncipha

7) Indawo yokusebenza ye-DC yeamplifier yomgca

8) Ukunyuka kwe-ripple kwisekethe yonikezelo lwamandla

Yonke le ntsebenzo ingentla yempembelelo ye-dielectric absorption ayinakwahlulwa kwi-essence ye-capacitor's "inertia", oko kukuthi, kwixesha elichaziweyo lokutshaja alihlawuliswa kwixabiso elilindelekileyo, kwaye ngokuphambene nokukhutshwa kukwanjalo.

Ukuxhatshazwa kwe-insulation (okanye ukuvuza kwangoku) kwe-capacitor enexabiso elikhulu le-Ka lihluke kwi-capacitor efanelekileyo (Ka = 0) ekunyuseni kunye nexesha elide lokuvavanya (ukuvuza kwangoku kuncipha).Ixesha lovavanyo lwangoku elichazwe e-China ngumzuzu omnye.