Tus kheej zoo siab Switching Voltage Regulator
Hom Circuit Court ntawm tus kheej zoo siab switching tswj fais fab mov: Qhov no yog ib tug switching fais fab mov muaj li ntawm intermittent oscillator circuits, thiab yog ib qho ntawm cov khoom siv hluav taws xob yooj yim siv tam sim no.
Thaum txuas nrog lub hwj chim mov hauv R1 mus rau lub raj hloov VT1 los muab kev pib tam sim no, kom VT1 pib ua, nws cov khoom siv tam sim no Ic hauv L1 hauv kev loj hlob hauv L2 induced kom lub hauv paus ntawm VT1 yog qhov zoo heev, tsis tshua muaj txiaj ntsig zoo tawm tswv yim voltage emitter, kom VT1 saturated sai heev. Nyob rau tib lub sijhawm, qhov induction voltage rau C1 them, nrog rau C1 them voltage nce, VT1 lub hauv paus muaj peev xwm maj mam txo qis, ua rau VT1 tawm ntawm thaj tsam saturation, Ic pib txo qis hauv L2 inducted kom lub hauv paus ntawm VT1 tsis tshua muaj siab. Tsis zoo, emitting ib tug zoo heev voltage, kom lub VT1 sai txiav tawm, ces lub diode VD1 conduction, lub high-frequency transformer T thawj winding nyob rau hauv lub zog cia tso rau lub load. Nyob rau hauv VT1 txiav-tawm, L2, tsis muaj inductive voltage, DC fais fab mov input voltage los ntawm R1 rau C1 thim rov qab them, maj mam nce lub VT1 lub hauv paus peev xwm, kom nws re-conductivity, ib zaug dua flipped mus txog saturation, lub Circuit Court. yog li rov oscillation cia. Ntawm no yog zoo li ib qho kawg flyback switching fais fab mov, los ntawm lub thib ob winding ntawm lub transformer T mus rau lub load tso zis qhov yuav tsum tau voltage.
Nws tus kheej zoo siab hloov hluav taws xob nyob rau hauv lub raj hloov pauv plays lub luag haujlwm ntawm kev hloov thiab oscillation, tab sis kuj tshem tawm cov tswj Circuit Court. Circuit Court vim hais tias lub load yog nyob rau hauv lub thib ob transformer thiab ua hauj lwm nyob rau hauv lub flyback xeev, nrog rau qhov zoo ntawm kev tawm tswv yim thiab tso zis cais. Qhov Circuit Court no tsis yog tsuas yog tsim rau cov khoom siv hluav taws xob siab, tab sis kuj rau cov khoom siv hluav taws xob tsawg.
Ib-kawg Flyback Hloov Cov Khoom Siv Hluav Taws Xob
Hom Circuit Court ntawm ib leeg-kawg rau pem hauv ntej switching fais fab mov: lub Circuit Court no zoo ib yam li ib-kawg flyback circuit nyob rau hauv daim ntawv, tab sis qhov ua hauj lwm qhov teeb meem yog txawv. Thaum hloov lub raj VT1 conductive, VD2 kuj conductive, ces lub hwj chim daim phiaj mus rau lub load xa mus rau lub zog, lim inductor L cia lub zog; Thaum lub raj hloov VT1 txiav tawm, inductor L los ntawm kev txuas ntxiv ntawm lub diode VD3 txuas ntxiv tso tawm lub zog rau lub nra.
Kuj tseem muaj lub clamp coil nrog diode VD2 nyob rau hauv Circuit Court, uas txwv qhov siab tshaj plaws voltage ntawm switching tube VT1 mus rau nruab nrab ntawm ob npaug ntawm cov khoom voltage. Txhawm rau kom ua tiav cov txheej txheem rov pib dua tshiab, piv txwv li, lub sijhawm hloov pauv thiab rov pib dua yuav tsum sib npaug, yog li lub luag haujlwm ntawm cov pulses hauv Circuit Court tsis tuaj yeem siab dua 50%. Txij li thaum qhov hluav taws xob no xa hluav taws xob mus rau qhov thauj khoom los ntawm kev hloov pauv thaum hloov lub raj VT1, nws muaj lub zog tso zis ntau ntawm 50-200W. Lub transformer siv nyob rau hauv Circuit Court muaj ib tug complex qauv thiab ib tug loj loj, thiab nws yog vim li no hais tias cov tswv yim siv ntawm no Circuit Court yog tsawg.
