Analysis of inductor current| ALLAH YA KARA SAUKI

Zane na inductor yana kawo ƙalubale da yawa ga injiniyoyi a cikin ƙirar canza wutar lantarki. Injiniyoyin ya kamata ba kawai zabar darajar inductance ba, har ma suyi la'akari da halin yanzu wanda inductor zai iya ɗauka, juriya na iska, girman injin da sauransu. Tasirin halin yanzu na DC akan inductor, wanda kuma zai samar da mahimman bayanai don zaɓar inductor mai dacewa.

Fahimtar aikin inductor

Sau da yawa ana fahimtar inductor a matsayin L a cikin da'irar tacewa ta LC a cikin fitarwa na samar da wutar lantarki (C shine capacitor na fitarwa). Duk da cewa wannan fahimtar daidai ce, amma yana da kyau a sami zurfin fahimtar halayen inductor don fahimtar ƙirar inductor.

A cikin jujjuyawa zuwa ƙasa, ƙarshen inductor yana haɗa da ƙarfin fitarwa na DC. Ɗayan ƙarshen yana haɗawa da ƙarfin shigarwa ko GND ta hanyar sauyawa mita mita.

An haɗa inductor zuwa ƙarfin shigarwa ta hanyar MOSFET, kuma an haɗa inductor zuwa GND. Saboda amfani da irin wannan na'urar sarrafawa, inductor na iya zama ƙasa ta hanyoyi biyu: ta hanyar diode grounding ko ta MOSFET grounding. Idan hanya ce ta ƙarshe, ana kiran mai canza canjin yanayin "synchronus".

Yanzu sake duba idan halin yanzu yana gudana ta hanyar inductor a cikin waɗannan jihohin biyu ya canza. Ɗayan ƙarshen inductor yana haɗa da ƙarfin shigarwa kuma ɗayan yana haɗa da ƙarfin fitarwa. Domin mai jujjuyawa zuwa ƙasa, ƙarfin shigarwar dole ne ya kasance sama da ƙarfin fitarwa, don haka za a sami raguwar ƙarfin lantarki mai kyau akan inductor. Akasin haka, a lokacin jihar 2, ɗayan ƙarshen inductor da aka haɗa da asali zuwa ƙarfin shigarwa yana haɗa zuwa ƙasa. Don mai jujjuya matakin ƙasa, ƙarfin wutar lantarki dole ne ya zama tabbatacce, don haka za a sami raguwar ƙarfin lantarki mara kyau akan inductor.

Don haka, lokacin da ƙarfin lantarki akan inductor ya kasance tabbatacce, na yanzu akan inductor zai ƙaru; lokacin da ƙarfin lantarki akan inductor ya kasance mara kyau, halin yanzu akan inductor zai ragu.

Za a iya yin watsi da digon-ƙarfi na inductor ko juzu'in wutar lantarki na gaba na Schottky diode a cikin da'irar asynchronous idan aka kwatanta da shigarwa da ƙarfin fitarwa.

Saturation na inductor core

Ta hanyar mafi girman halin yanzu na inductor wanda aka ƙididdigewa, zamu iya gano abin da aka samar akan inductor. Yana da sauƙi a san cewa yayin da halin yanzu ta hanyar inductor ya karu, ƙaddamarwarsa yana raguwa. An ƙaddara wannan ta hanyar kaddarorin zahiri na kayan aikin maganadisu. Nawa inductance za a rage yana da mahimmanci: idan an rage inductance da yawa, mai canzawa ba zai yi aiki da kyau ba. Lokacin da abin da ke wucewa ta wurin inductor ya yi girma har inductor ya yi tasiri, na yanzu ana kiransa "saturation current". Wannan kuma shine ainihin ma'aunin inductor.

A zahiri, inductor mai sauyawa a cikin da'irar juyawa koyaushe yana da jikewa na "laushi". Lokacin da halin yanzu ya karu zuwa wani matsayi, inductance ba zai ragu sosai ba, wanda ake kira "laushi" yanayin jikewa. Idan halin yanzu ya sake karuwa, inductor zai lalace. Ragewar inductance yana wanzuwa a cikin nau'ikan inductor da yawa.

Tare da wannan fasalin jikewa mai laushi, zamu iya sanin dalilin da yasa aka ƙayyade ƙaramin inductance ƙarƙashin halin yanzu na DC a cikin duk masu canzawa, kuma canjin ripple na yanzu ba zai yi tasiri sosai ga inductance ba. A cikin duk aikace-aikacen, ana sa ran ripple halin yanzu ya zama ƙanƙanta kamar yadda zai yiwu, saboda zai shafi tasirin ƙarfin fitarwa. Wannan shine dalilin da ya sa mutane koyaushe suna damuwa game da inductance a ƙarƙashin fitarwa na yanzu na DC kuma suyi watsi da inductance a ƙarƙashin ripple halin yanzu a cikin Spec.

Abin da ke sama shine gabatarwar nazarin inductor na yanzu, idan kuna son ƙarin sani game da inductor, da fatan za ku iya tuntuɓar mu.