I-coefficient yokumuncwa yama-film capacitor ibhekisele kuphi?Ingabe incane, ingcono?

Ngaphambi kokwethula i-coefficient yokumuncwa yama-capacitor wefilimu, ake sibheke ukuthi iyini i-dielectric, i-polarization ye-dielectric kanye nesenzakalo sokumuncwa kwe-capacitor.

I-Dielectric

I-dielectric yinto engaconductive, okungukuthi, isivikelo, esingenayo inkokhiso yangaphakathi enganyakaza. Uma i-dielectric ibekwe endaweni ye-electrostatic, ama-electron nama-nuclei ama-athomu e-dielectric enza "i-microscopic relative displacement" ngaphakathi kwebanga le-athomu. ngaphansi kwesenzo samandla kagesi, kodwa hhayi "ukunyakaza okukhulu" kude ne-athomu okukuyo, njengama-electron amahhala ku-conductor.Lapho ukulingana kwe-electrostatic kufinyelelwa, amandla enkambu ngaphakathi kwe-dielectric awawona uziro.Lona umehluko omkhulu phakathi kwezakhiwo zikagesi zama-dielectrics nama-conductor.

I-Dielectric polarization

Ngaphansi kwesenzo senkambu kagesi esetshenzisiwe, umzuzu we-dielectric we-macroscopic uvela ngaphakathi kwe-dielectric eduze nesiqondiso sensimu kagesi, futhi inkokhelo eboshiwe ivela endaweni ye-dielectric, okuyi-polarization ye-dielectric.

Isenzo sokumuncwa

isikhathi sokusheshisa inqubo yokushaja nokukhishwa kwe-capacitor okubangelwa i-polarization ehamba kancane ye-dielectric ngaphansi kwesenzo sensimu kagesi esetshenzisiwe.Ukuqonda okuvamile ukuthi i-capacitor iyadingeka ukuthi ikhokhiswe ngokugcwele ngokushesha, kodwa ayigcwaliswa ngokushesha;i-capacitor iyadingeka ukuze ikhulule ukushaja ngokuphelele, kodwa ayikhululwa, futhi kwenzeka okwenzekayo ngesikhathi.

I-coefficient yokumuncwa yefilimu capacitor

Inani elisetshenziselwa ukuchaza into yokumuncwa kwe-dielectric yama-capacitor wefilimu libizwa ngokuthi i-absorption coefficient, futhi kubhekiselwa kulo ngu-Ka.Umphumela wokumuncwa kwe-dielectric wama-capacitor wefilimu unquma izici zemvamisa ephansi yama-capacitor, futhi inani le-Ka liyahluka kakhulu kuma-dielectric capacitor ahlukene.Imiphumela yokulinganisa iyahlukahluka ngezikhathi zokuhlola ezihlukene ze-capacitor efanayo;inani le-Ka liyahlukahluka kuma-capacitor wencazelo efanayo, abakhiqizi abahlukene, namaqoqo ahlukene.

Ngakho-ke kunemibuzo emibili manje-

Q1.Ingabe i-coefficient yokumuncwa yama-filimi capacitor incane ngangokunokwenzeka?

Q2.Iyini imiphumela emibi ye-coefficient yokumunca enkudlwana?

A1:

Ngaphansi kwesenzo senkundla kagesi esetshenziswayo: i-Ka encane (i-coefficient encane yokumunca) → iba buthaka ukuhlukaniswa kwe-dielectric (okungukuthi isivikelo) → yehlisa amandla okubopha endaweni ye-dielectric → incane amandla okubopha we-dielectric ekushicileleni kwe-charge → ukuncipha kokwenzeka kokumuncwa kwe-capacitor → i-capacitor iyashaja futhi iphume ngokushesha.Isimo esikahle: I-Ka ingu-0, okungukuthi i-coefficient yokumuncwa ngu-0, i-dielectric (okungukuthi isivikelo) ayinaso isimo se-polarization ngaphansi kwesenzo senkambu kagesi esetshenziswayo, i-dielectric surface ayinawo amandla okubopha ukudonsa ekushajelweni, kanye neshaje ye-capacitor nokuphendula kokukhipha. ayinayo i-hysteresis.Ngakho-ke, i-coefficient yokumuncwa ye-film capacitor incane kakhulu.

A2:

Umphumela we-capacitor enenani elikhulu kakhulu le-Ka kumasekhethi ahlukene uzibonakalisa ngezindlela ezihlukene, kanje.

1) Amasekhethi ahlukene abe amasekethe ahlanganisiwe

2) Isifunda se-Sawtooth sidala ukubuya okukhulayo kwegagasi le-sawtooth, futhi ngaleyo ndlela isifunda asikwazi ukululama ngokushesha.

3) Imikhawulo, ama-clamps, ukuhlanekezela kwe-wave wave okukhiphayo okuwumngcingo

4) Isikhathi esingaguquki sesihlungi sokushelela i-ultra-low frequency siba sikhulu

(5) I-DC amplifier zero point iphazamisekile, i-drift yendlela eyodwa

6) Ukunemba kwesekhethi yesampula nokubamba kuyehla

7) Indawo yokusebenza ye-Drift ye-linear amplifier

8) Ukwenyuka kwe-ripple kusekethe yokuphakelwa kwamandla

Konke ukusebenza okungenhla komphumela wokumuncwa kwe-dielectric akunakuhlukaniswa nengqikithi ye-“inertia” ye-capacitor, okungukuthi, ngesikhathi esishiwo ukushaja akukhokhiswa kunani elilindelekile, futhi okuphambene nalokho kuphinde kube njalo.

Ukumelana nokufakwa kwe-insulation (noma ukuvuza kwamanje) kwe-capacitor enenani elikhulu le-Ka kuhlukile kulokho kwe-capacitor ekahle (Ka=0) ngoba inyuka ngesikhathi sokuhlola eside (ukuvuza kwamanje kuncipha).Isikhathi samanje sokuhlola esicaciswe e-China iminithi elilodwa.