Basic Cheebtsam ntawm lub hwj chim mov
Taw qhia txog Kev Hloov Hluav Taws Xob
Cov ntaub ntawv no yog kev cob qhia ntxiv rau Zhang Zhansong qhov kev hloov pauv hloov hluav taws xob siab tshaj plaws. Raws li kev npaj npaj, Shen Gong piav qhia txog kev tsim lub tshuab hluav taws xob. Nyob rau hauv tsab xov xwm no, lub hauv paus ntsiab lus ntawm kev tsim transformer yog luv luv, nrog rau kev tsom mus rau kev piav qhia txog lub hauv paus ntsiab lus ntawm kev ua haujlwm hauv Circuit Court thiab kev suav thiab xaiv cov khoom tseem ceeb hauv cov txheej txheem tsim.
Cov txheej txheem ua haujlwm ntawm lub zog hloov hluav taws xob yog qhov yooj yim to taub, thiab nws muaj peb yam ntxwv pom tseeb:
Hloov: Lub zog hluav taws xob cov khoom siv hluav taws xob ua haujlwm hauv lub xeev hloov es tsis yog lub xeev linear
High zaus: Lub zog hluav taws xob cov khoom siv hluav taws xob ua haujlwm ntawm cov khoom siv hluav taws xob ntau dua li nyob ze ntawm lub zog zaus
DC: Hloov cov khoom siv hluav taws xob tso tawm DC hloov AC, thiab tseem tuaj yeem tso zis ntau zaus AC, xws li hluav taws xob transformers
Switching power supply classification:
Cov khoom siv hluav taws xob hloov pauv tau muab faib ua ntau hom raws li topology: phaw boost rau pem hauv ntej flyback ib nrab choj puv choj LLC, thiab lwm yam. Txawm li cas los xij, hauv paus, hloov cov khoom siv hluav taws xob tsuas muaj ob hom kev ua haujlwm: rau pem hauv ntej: xa lub zog thaum tig rau, thiab flyback. : xa hluav taws xob thaum lub qhov hluav taws xob raug tua.
Tam sim no qhov chaw PWM ib qho kawg flyback fais fab mov
Qhov zoo ntawm hom flyback fais fab mov: cov qauv yooj yim, tus nqi pheej yig, tsim nyog rau cov khoom siv hluav taws xob tsawg.
Qhov tsis zoo ntawm hom flyback fais fab mov no yog: lub zog me me, feem ntau qis dua 150W, loj ripple, tsis tshua muaj hluav taws xob hloov kho tus nqi, feem ntau ntau dua 5 feem pua.
Qhov teeb meem tseem ceeb hauv kev tsim cov khoom siv hluav taws xob zoo li no yog qhov tsim ntawm cov khoom siv hluav taws xob, tshwj xeeb tshaj yog cov khoom siv hluav taws xob uas muaj qhov hluav taws xob ntau thiab ntau qhov tawm.
Rectifier lim Circuit Court
AC voltage yog rectified los ntawm BRG1 thiab lim los ntawm C5 kom tau ib tug kuj ntshiab DC voltage. Yog tias lub peev xwm ntawm C5 txo qis, cov zis AC ripple yuav nce, yog li xaiv qhov tsim nyog C5 tseem ceeb heev rau kev ruaj ntseg.
Kev xaiv kev paub: Feem ntau, 380VAC hloov hluav taws xob C5 yam tsis muaj PFC raug xaiv raws li 1.5-2.5uF/w. Raws li tus qauv no, feem ntau ntawm cov kev xav tau ntawm lub zog lim dej tuaj yeem ua tiav. Qhov sib txawv tshwj xeeb yuav tsum yog nyob ntawm qhov kub thiab txias, thiab qhov capacitance yuav tsum loj dua thaum qhov kub thiab txias.
Capacitor C6 yog ib tug high-frequency nyias zaj duab xis capacitor uas muab lub zog thiab Circuit Court thaum lub sij hawm rectifier choj commutation, thiab muaj ib tug tseem ceeb inhibitory nyhuv ntawm lub hwj chim conduction cuam tshuam.
