izindaba

Uma kukhulunywa nge-inductor, abaklami abaningi bayesaba ngoba abazi ukuthi basebenzise kanjaniinductor. Izikhathi eziningi, njengekati likaSchrodinger: kuphela uma uvula ibhokisi, ungakwazi ukwazi ukuthi ikati lifile noma cha. Kuphela uma i-inductor isidayisiwe futhi isetshenziswa kumjikelezo lapho singakwazi khona ukuthi isetshenziswe ngendlela efanele noma cha.

Kungani i-inductor inzima kangaka? Ngoba i-inductance ihilela insimu ye-electromagnetic, futhi ithiyori efanelekile yendawo kazibuthe kanye noguquko phakathi kwezinkundla kazibuthe nezikagesi kuvame ukuba nzima kakhulu ukuyiqonda. Ngeke sixoxe ngesimiso se-inductance, umthetho kaLenz, umthetho wesandla sokudla, njll. Eqinisweni, mayelana ne-inductor, okufanele sikunake kuseyimingcele eyisisekelo ye-inductor : inani le-inductance, lamanje elilinganiselwe, imvamisa ye-resonant, isici sekhwalithi. (Q inani).

Ekhuluma nge-value ye-inductance, kulula kuwo wonke umuntu ukuthi aqonde ukuthi into yokuqala esiyinaka "inani le-inductance". Okubalulekile ukuqonda ukuthi inani le-inductance limelela ini. Limelelani inani le-inductance? Inani le-inductance limelela ukuthi uma likhulu inani, amandla amaningi e-inductance angawagcina.

Bese sidinga ukucabangela indima yenani elikhulu noma elincane le-inductance kanye namandla amaningi noma amancane eliwagcinayo. Lapho inani le-inductance kufanele libe likhulu, futhi lapho inani le-inductance kufanele libe lincane.

Ngesikhathi esifanayo, ngemva kokuqonda umqondo wevelu ye-inductor kanye nokuhlanganiswa nefomula yethiyori ye-inductance, singaqonda ukuthi yini ethinta inani le-inductance ekukhiqizeni i-inductor nokuthi ingakhuliswa noma yehliswe kanjani.

I-current elinganisiwe nayo ilula kakhulu, njengokumelana, ngoba i-inductor ixhunywe ochungechungeni kumjikelezo, nakanjani izogeleza okwamanje. Inani lamanje elivumelekile ilelamanje elilinganiselwe.

Imvamisa ye-resonant akulula ukuyiqonda. I-inductor esetshenziswa ekusebenzeni akumele ibe ingxenye efanelekile. Izoba namandla alinganayo, ukumelana okulinganayo namanye amapharamitha.

Imvamisa ye-resonant isho ukuthi ngaphansi kwalesi mvamisa, izici zomzimba ze-inductor zisaziphatha njenge-inductor, futhi ngaphezu kwalokhu kuvamile, ayisaziphathi njenge-inductor.

Isici sekhwalithi (inani le-Q) siyadida nakakhulu. Eqinisweni, isici sekhwalithi sibhekisela esilinganisweni samandla agcinwe yi-inductor ekulahlekelweni kwamandla okubangelwa i-inductor emjikelezweni wesignali emvamisa yesignali ethile.

Kumele kuqashelwe lapha ukuthi isici sekhwalithi sitholakala ngemvamisa ethile. Ngakho-ke uma sithi inani le-Q le-inductor liphezulu, empeleni lisho ukuthi liphezulu kunevelu ye-Q yamanye ama-inductors endaweni ethile yemvamisa noma ibhendi ethile yefrikhwensi.

Qonda le miqondo bese uyifaka ekusebenzeni.

Ama-inductors ngokuvamile ahlukaniswa abe izigaba ezintathu ezisetshenziswayo: ama-inductors kagesi, ama-inductors avamile kanye nama-inductors avamile.

Okokuqala, ake sikhulume ngakhoinductor yamandla.
I-inductor yamandla isetshenziswa kumjikelezo wamandla. Phakathi kwama-inductors amandla, into ebaluleke kakhulu okufanele uyinake inani le-inductance kanye nenani elilinganiselwe lamanje. Imvamisa ye-resonance kanye nekhwalithi yesici ngokuvamile akudingekile ukuthi ikhathazeke kakhulu.

Kungani?Ngobaama-inductors kagesizivame ukusetshenziswa ezimweni eziphansi-imvamisa kanye nezimo eziphezulu zamanje. Khumbula ukuthi iyini imvamisa yokushintsha yemodyuli yamandla kusekethe ye-boost noma isekethe ye-buck? Ingabe ingamakhulu ambalwa kuphela ama-K, futhi imvamisa yokushintsha esheshayo imbalwa kuphela i-M. Ngokuvamile, leli nani liphansi kakhulu kune-self-resonant frequency ye-inductor yamandla. Ngakho-ke asikho isidingo sokukhathalela imvamisa ye-resonant.

Ngokufanayo, kumjikelezo wamandla okushintsha, okukhiphayo kokugcina okwamanje kwe-DC, futhi ingxenye ye-AC empeleni ilandisa ingxenye encane.

Isibonelo, ngokukhishwa kwamandla okungu-1W BUCK, ingxenye ye-DC ithatha u-85%, 0.85W, futhi ingxenye ye-AC ithatha u-15%, 0.15W. Ake sithi ikhwalithi ye-Q ye-inductor yamandla esetshenzisiwe yi-10, ngoba ngokusho kwencazelo yekhwalithi yekhwalithi ye-inductor, isilinganiso samandla agcinwe yi-inductor kumandla adliwe yi-inductor. I-inductance idinga ukugcina amandla, kodwa ingxenye ye-DC ayikwazi ukusebenza. Ingxenye ye-AC kuphela engasebenza. Khona-ke ukulahlekelwa kwe-AC okubangelwa yile inductor kungu-0.015W kuphela, okubala u-1.5% wawo wonke amandla. Ngenxa yokuthi inani le-Q le-inductor yamandla likhulu kakhulu kuno-10, ngokuvamile asinandaba kangako nale nkomba.

Ake sixoxei-high-frequency inductor.
Ama-inductors ama-high-frequency inductors asetshenziswa kumasekhethi anemvamisa ephezulu. Emasekhethini ama-high-frequency, i-current ngokuvamile incane, kodwa imvamisa edingekayo iphezulu kakhulu. Ngakho-ke, izinkomba ezibalulekile ze-inductor ziba imvamisa ye-resonance kanye nesici sekhwalithi.

I-resonant frequency and quality factor yizici ezihlobene kakhulu nemvamisa, futhi kuvame ukuba nejika lesici lemvamisa elihambisana nazo.

Lesi sibalo kumele siqondwe. Kufanele wazi ukuthi iphuzu eliphansi kakhulu kumdwebo we-impedance wesici se-resonance frequency point iphuzu lokuvama kwe-resonance. Amanani wesici sekhwalithi ahambisana namafrikhwensi ahlukene azotholakala kumdwebo wesici semvamisa yesici sekhwalithi. Bona ukuthi ingakwazi yini ukuhlangabezana nezidingo zesicelo sakho.

Kuma-inductors ajwayelekile, kufanele sibheke ikakhulukazi izimo ezihlukene zohlelo lokusebenza, noma ngabe zisetshenziswa kumjikelezo wesihlungi samandla noma kusihlungi sesignali, imvamisa yesignali engakanani, ingakanani yamanje, njalo njalo. Ngezimo ezahlukene, kufanele sinake izici zabo ezihlukene.

Uma unentshisekelo, sicela ukhululeke ukuxhumanaMingdaukuze uthole imininingwane eyengeziwe.