Chii chinoreva kudzika kwe absorption coefficient yema film capacitors? Kana iri diki, zviri nani here?

Tisati tatanga kutsanangura kuti ma "absorption coefficient" ema "film capacitors" anobatwa sei, ngatitarisei kuti chii chinonzi "dielectric", "polarization" ye "dielectric" uye "absorption phenomenon" ye "capacitor".

Dielectric

Dielectric chinhu chisingafambise magetsi, kureva, chinodziisa magetsi, chisina chaji yemukati inogona kufamba. Kana dielectric ikaiswa mumunda une electrostatic, maerekitironi nema nuclei emaatomu ane dielectric anoita "microscopic relative displacement" mukati meatomu pasi pesimba remagetsi, asi kwete "kufamba kukuru" kubva paatomu yaanofanira kuva, semaerekitironi akasununguka ari muconductor. Kana electrostatic equilibrium yasvika, simba remunda riri mukati me dielectric harisi zero. Uyu ndiwo musiyano mukuru pakati pehunhu hwemagetsi hwe dielectric nemaconductor.

Kupatsanurana kwemagetsi (dielectric polarization)

Pasi pekushanda kwemunda wemagetsi wakashandiswa, nguva yedipole yakawanda inoonekwa mukati me dielectric ichitevedza divi remunda wemagetsi, uye charge yakasungwa inoonekwa pamusoro pe dielectric, inova polarization ye dielectric.

Chiitiko chekunyudzwa

chiitiko chekunonoka kwenguva mukuita kwekuchaja nekuburitsa capacitor kunokonzerwa nekukanganisika kwe dielectric pasi pesimba remagetsi rinoshandiswa. Kunzwisisana kwakajairika ndekwekuti capacitor inofanirwa kuchajwa zvizere ipapo ipapo, asi haizadzwe ipapo ipapo; capacitor inofanirwa kusunungura chaji zvachose, asi haiburitswe, uye chiitiko chekunonoka kwenguva chinoitika.

Kukwana kwemushonga wemufirimu

Kukosha kunoshandiswa kutsanangura chiitiko chekunyudzwa kwe dielectric kwema film capacitors kunonzi absorption coefficient, uye kunotaurwa nezvako naKa. Kunyudzwa kwe dielectric kwema film capacitors kunosarudza hunhu hwe frequency yakaderera yema capacitors, uye kukosha kweKa kunosiyana zvikuru kune akasiyana ma dielectric capacitors. Mhedzisiro yekuyera inosiyana kwenguva dzakasiyana dzebvunzo dze capacitor imwe chete; kukosha kweKa kunosiyanawo kune ma capacitors ane specification imwechete, vagadziri vakasiyana, uye ma batches akasiyana.

Saka pane mibvunzo miviri ikozvino-

Mubvunzo 1. Ko mwero wekunyudzwa kwemafuta emufirimu mudiki sezvinobvira here?

Mubvunzo wechipiri. Ndeipi migumisiro yakaipa yekunyudzwa kwemvura yakawanda?

A1:

Pasi pekushanda kwesimba remagetsi rinoshandiswa: Ka diki (chikamu chidiki chekunyudzwa) → kuderera kwepolarization ye dielectric (kureva insulator) → kuderera kwesimba rekusunga pamusoro pe dielectric → kuderera kwesimba rekusunga re dielectric pakudzvanya traction → kuderera kwechiitiko chekunyudzwa che capacitor → capacitor inochaja uye inoburitsa nekukurumidza. Mamiriro akanaka: Ka i0, kureva kuti kunyudzwa coefficient i0, dielectric (kureva insulator) haina chiitiko chekunyudzwa polarization pasi pekushanda kwesimba remagetsi rinoshandiswa, nzvimbo ye dielectric haina simba rekusunga traction pacharge, uye capacitor charge uye discharge response haina hysteresis. Naizvozvo, kuderera kwe absorption coefficient ye film capacitor ndiko kuri nani.

A2:

Mhedzisiro ye capacitor ine kukosha kukuru kweKa pamatunhu akasiyana inozviratidza mumhando dzakasiyana, seizvi.

1) Maseketi akasiyana anova maseketi akabatana

2) Sawtooth circuit inokonzera kudzoka kwakawedzerwa kwe sawtooth wave, saka circuit haigone kupora nekukurumidza

3) Zvimisikidzo, zvisungo, kukanganiswa kwechimiro chemhepo chinobuda

4) Nguva isingachinji yefirita inotsvedzerera ine frequency yakaderera inova yakakura

(5) DC amplifier zero point yakanganiswa, kutenderera kwenzira imwe chete

6） Kururama kwedunhu rekutora sampuro nekubata kunoderera

7) Kudonha kwe DC operating point ye linear amplifier

8) Kuwedzera kwehutsi mudunhu remagetsi

Zvese zvataurwa pamusoro apa zve dielectric absorption effect hazviparadzanisike kubva pa "inertia" ye capacitor, kureva kuti, munguva yakatarwa kuchaja hakuchajiswi kusvika pamutengo unotarisirwa, uye zvinopesana nekuburitsa kwacho ndizvo zvinoitikawo.

Kudzivirira kupinza (kana kudonha kwemvura) kwe capacitor ine kukosha kukuru kweKa kwakasiyana nekwe capacitor yakanaka (Ka=0) pakuti inowedzera nekufamba kwenguva refu kwekuyedza (kudonha kwemvura kunoderera). Nguva yekuyedza iripo yakataurwa muChina imineti imwe chete.