iindaba

Xa kuziwa kwi-inductor, abaninzi abayili bezothukile kuba abayazi indlela yokusebenzisainductor. Amaxesha amaninzi, njengekati kaSchrodinger: kuphela xa uvula ibhokisi, unokwazi ukuba ikati ifile okanye hayi. Kuphela xa i-inductor ithengiswa ngokwenene kwaye isetyenziswe kwisekethe esinokuthi siyazi ukuba isetyenziswe ngokuchanekileyo okanye hayi.

Kutheni i-inductor inzima kangaka? Ngenxa yokuba i-inductance ibandakanya intsimi ye-electromagnetic, kunye nethiyori efanelekileyo yentsimi ye-electromagnetic kunye notshintsho phakathi kwemimandla yemagnethi kunye nombane ihlala inzima kakhulu ukuyiqonda. Asiyi kuxubusha umgaqo we-inductance, umthetho kaLenz, umthetho wesandla sasekunene, njl.n (Q ixabiso).

Ukuthetha ngexabiso le-inductance, kulula ukuba wonke umntu aqonde ukuba into yokuqala esiyinikela ingqalelo kuyo "ixabiso le-inductance". Into ephambili kukuqonda ukuba ixabiso le-inductance limele ntoni. Limele ntoni ixabiso le-inductance? Ixabiso le-inductance libonisa ukuba likhulu ixabiso, amandla amaninzi i-inductance inokugcina.

Emva koko kufuneka siqwalasele indima yexabiso elikhulu okanye elincinci le-inductance kunye namandla amaninzi okanye amancinci ayigcinayo. Xa ixabiso le-inductance kufuneka libe likhulu, kwaye xa ixabiso le-inductance kufuneka libe lincinci.

Ngelo xesha, emva kokuqonda ingcamango yexabiso le-inductance kunye nokudibanisa ne-formula ye-theory ye-inductance, sinokuqonda into echaphazela ixabiso le-inductance kwimveliso ye-inductor kunye nendlela yokunyusa okanye ukunciphisa.

Umjelo olinganisiweyo nawo ulula kakhulu, njengokumelana nokuchasana, kuba i-inductor ixhunyiwe kwichungechunge kwisekethe, ngokuqinisekileyo iya kuhamba ngoku. Ixabiso langoku elivumelekileyo ngulo ulinganisiweyo lwangoku.

I-resonant frequency akukho lula ukuyiqonda. I-inductor esetyenzisiweyo akufuneki ibe licandelo elifanelekileyo. Iya kuba ne-capacitance elinganayo, ukuchasana ngokulinganayo kunye nezinye iiparamitha.

I-resonant frequency ithetha ukuba ngaphantsi kwesi sihlandlo, iimpawu zomzimba ze-inductor zisaziphatha njenge-inductor, kwaye ngaphezu kwesi sihlandlo, ayisaziphathanga njenge-inductor.

Umgangatho womgangatho (ixabiso le-Q) ubhideka ngakumbi. Enyanisweni, umgangatho womgangatho ubhekisela kumlinganiselo wamandla agcinwe yi-inductor kwilahleko yamandla ebangelwa yi-inductor kumjikelezo wesignali kwi-frequency ethile yesignali.

Kufuneka kuqatshelwe apha ukuba umgangatho womgangatho ufunyenwe kwi-frequency ethile. Ke xa sisithi ixabiso le-Q le-inductor liphezulu, oko kuthetha ukuba liphezulu kunexabiso le-Q lamanye ama-inductors kwindawo ethile okanye ibhendi ethile.

Qonda la magama uze uwasebenzise.

Ii-inductors ngokubanzi zohlulwe zibe ziindidi ezintathu kwisicelo: ii-inductors zamandla, ii-inductors ze-high-frequency inductors kunye nee-inductors eziqhelekileyo.

Okokuqala, makhe sithethe ngayoinductor yamandla.
Inductor yamandla isetyenziswa kwisekethe yamandla. Phakathi kwee-inductors zamandla, into ebaluleke kakhulu ukuyiqwalasela yixabiso le-inductance kunye nexabiso elilinganisiweyo langoku. I-resonance frequency kunye nomgangatho womgangatho ngokuqhelekileyo akufuneki ukhathazeke kakhulu.

Kutheni?Kubaii-inductors zamandlazihlala zisetyenziswa kwiimeko eziphantsi kunye neemeko eziphezulu. Khumbula ukuba yintoni ukutshintshwa rhoqo kwimodyuli yamandla kwisekethe ye-boost okanye i-buck circuit? Ngaba ngamakhulu ambalwa K, kwaye i-frequency ekhawulezayo yokutshintsha kuphela i-M ezimbalwa. Ngokuqhelekileyo, eli xabiso liphantsi kakhulu kune-self-resonant frequency ye-inductor yamandla. Ke akufuneki sikhathale ngamaza e-resonant.

Ngokufanayo, kwisekethe yamandla okutshintsha, isiphumo sokugqibela yi-DC yangoku, kunye necandelo le-AC ngokwenene libalelwa kumlinganiselo omncinci.

Umzekelo, kwi-1W BUCK imveliso yamandla, icandelo le-DC libalelwa kwi-85%, i-0.85W, kunye necandelo le-AC libalelwa kwi-15%, i-0.15W. Masithi umgangatho we-Q we-inductor yamandla esetyenzisiweyo yi-10, kuba ngokwenkcazo yomgangatho we-inductor, ngumlinganiselo wamandla agcinwe yi-inductor kumandla asetyenziswe yi-inductor. I-inductance idinga ukugcina amandla, kodwa icandelo le-DC alikwazi ukusebenza. Kuphela licandelo le-AC elinokusebenza. Emva koko ilahleko ye-AC ebangelwa yile inductor yi-0.015W kuphela, ibala i-1.5% yamandla onke. Ngenxa yokuba ixabiso le-Q le-inductor yamandla likhulu kakhulu kune-10, ngokuqhelekileyo asikhathali kakhulu ngesi salathisi.

Makhe sithethe ngayoinductor yesantya esiphezulu.
Ii-inductors ze-high-frequency inductors zisetyenziswa kwiisekethe eziphezulu ze-frequency. Kwiisekethe ze-high-frequency, i-current idla ngokuba yincinci, kodwa i-frequency efunekayo iphezulu kakhulu. Ke ngoko, izikhombisi eziphambili ze-inductor ziba frequency yeresonance kunye nomgangatho.

I-resonant frequency kunye nomgangatho womgangatho ziimpawu ezinxulumene kakhulu nobuninzi, kwaye kuhlala kukho ijiko leempawu ezihambelana nazo.

Eli nani kufuneka liqondwe. Kuya kufuneka uyazi ukuba elona nqaku lisezantsi kumzobo we-impedance we-resonance frequency factor is resonance frequency point. Amaxabiso ezinto ezisemgangathweni ahambelana nee-frequencies ezahlukeneyo ziya kufunyanwa kwi-frequency character diagram ye-quality factor. Jonga ukuba ingahlangabezana neemfuno zesicelo sakho.

Kwii-inductors eziqhelekileyo, kufuneka sijonge ubukhulu becala iimeko ezahlukeneyo zosetyenziso, nokuba zisetyenziswa kwisekethe yokucoca amandla okanye kwisihluzo somqondiso, ubungakanani befrikhwensi yomqondiso, ubungakanani bangoku, njalo njalo. Kwiimeko ezahlukeneyo, kufuneka sinikele ingqalelo kwiimpawu zabo ezahlukeneyo.

Ukuba unomdla, nceda uzive ukhululekile ukuqhagamshelanaMingdaiinkcukacha ezithe vetshe.