Basic form of switching power supply
1. Cov txheej txheem ua haujlwm ntawm kev hloov hluav taws xob
Lub zog hluav taws xob hloov pauv tau muab faib ua ob feem ntawm kev tswj xyuas Circuit Court: lub ntsiab Circuit Court thiab tswj Circuit Court.
Lub ntsiab Circuit Court muaj ib nrab: input Circuit Court (low-pass lim thiab thawj rectification), fais fab hloov hluav taws xob Circuit Court (electronic hloov thiab high-frequency transformer) thiab tso zis tswj Circuit Court (secondary rectification thiab smoothing lim).
Tswj Circuit Court Cheebtsam: teeb liab sampling Circuit Court, tswj Circuit Court (comparator thiab yuam kev amplifier), zaus oscillation generator.
Tom qab 220V AC hla dhau los ntawm qhov qis-pass lim Circuit Court thiab tus choj rectifier Circuit Court, ib qho tsis raug cai DC pulsating voltage tau txais, thiab qhov hluav taws xob pulsating raug kho los ntawm lub hwj chim. Ua kom nws cov tswv yim tam sim no tib yam li cov khoom siv hluav taws xob, thiab tau txais DC voltage nrog lub zog loj thiab cov ntsiab lus tsis sib haum xeeb. Qhov hluav taws xob no tau hloov mus rau hauv kev tswj hwm high-frequency square-wave pulse voltage uas ua tau raws li tus qauv tsim los ntawm cov hluav taws xob hloov hluav taws xob thiab cov hluav taws xob ntau zaus hloov hluav taws xob hloov hluav taws xob. Tom qab lub high-frequency voltage yog rectified thiab lim ob zaug, nws dhau los ua DC voltage tso zis. Sib piv thiab nthuav dav cov zis voltage divider piv txwv nrog cov teeb tsa siv hluav taws xob, thiab dhau los ntawm lub tshuab hluav taws xob zaus oscillation los tsim lub teeb liab siab, uas yog superimposed nrog lub teeb liab tswj, thiab mem tes dav thiab zaus hloov kho tau ua kom tiav pulse dav thiab zaus Modulated square wave.
2. Kev faib hluav taws xob hloov hluav taws xob
ib. Kev faib tawm raws li qhov ua haujlwm:
Kev hloov pauv nyuaj: xws li PWM pulse width modulation.
Mos Switching: Ib qho hluav taws xob hloov pauv ntawm xoom voltage thiab tua ntawm xoom tam sim no.
b. Kev faib tawm raws li kev hloov pauv: AC / DC, DC / DC, DC / AC, AC / AC.
c. Raws li seb puas muaj transformer cais ntawm cov tswv yim thiab cov zis
d. Muab faib raws li hom excitation: tus kheej zoo siab (ib zaug-nias, thawb-rub), sab nraud zoo siab (mem tes zaus hloov kho PFM, mem tes dav modulation PWM, mem tes amplitude modulation PAM, mem tes resonance RSM).
Pulse width modulation converters tuaj yeem muab faib ua ntau hom: rau pem hauv ntej, flyback, ib nrab choj, puv choj, thawb rub, thiab thaiv.
e. Kev faib tawm raws li hom resonance: series pab, thaum uas tig mus resonance, series-parallel resonance.
3. Cov khoom siv hluav taws xob hloov pauv
ib. Flyback ib leeg transistor conversion circuit
b. Flyback dual-transistor conversion Circuit Court
c. Forward ib leeg transistor conversion circuit
d. Forward ob-transistor conversion Circuit Court
e. Ib nrab-bridge conversion Circuit Court
f. Choj conversion Circuit Court
g. Push-rub conversion Circuit Court
h. RCC conversion Circuit Court
