Switching power supply science paub
Los ntawm Circuit Court tswj switching raj rau high-ceev txoj kev hla thiab txiav-tawm. DC rau hauv high-frequency alternating tam sim no muab rau lub transformer rau transformer, yog li tsim ib tug yuav tsum tau ib los yog ntau pawg ntawm voltage!
Hloov cov khoom siv hluav taws xob tuaj yeem muab faib ua qhov sib cais thiab tsis sib cais ob hom kev sib cais yuav tsum muaj qhov hloov pauv hloov pauv, thiab tsis cais tawm yuav tsis tas yuav muaj.
Lub hauv paus ntsiab lus ua haujlwm ntawm kev hloov hluav taws xob yog.
1. AC fais fab input rectified thiab lim rau DC; 2.
2. Los ntawm lub high-frequency PWM (Pulse Width Modulation) teeb liab tswj switching tube, lub DC ntxiv rau thawj switching transformer.
3. Hloov transformer theem nrab induction ntawm high-frequency voltage, rectified thiab lim los muab cov load.
4. Cov khoom tso tawm yog pub rov qab mus rau qhov kev tswj xyuas los ntawm ib lub voj voog los tswj PWM lub voj voog ua haujlwm kom ua tiav lub hom phiaj ntawm cov zis ruaj khov. AC fais fab input feem ntau mus dhau lub voj tam sim no ntawm ib yam dab tsi zoo li, lim tawm qhov cuam tshuam ntawm daim phiaj, tab sis kuj lim tawm cov khoom siv hluav taws xob ntawm daim phiaj cuam tshuam; nyob rau hauv tib lub hwj chim, hloov lub zog ntawm tib yam, hloov ntawm lub hwj chim ntawm tib yam.
Nyob rau hauv tib lub zog, qhov siab dua qhov hloov zaus, qhov me me ntawm qhov hloov pauv hloov pauv, tab sis qhov siab dua qhov yuav tsum tau muaj ntawm lub raj hloov pauv.
Qhov thib ob ntawm kev hloov pauv hloov pauv tuaj yeem muaj ntau tshaj ib qho winding lossis ib qho winding nrog ntau tshaj ib tus kais, thiaj li yuav tau txais cov khoom tsim nyog.
Feem ntau kuj yuav tsum tau ntxiv qee qhov kev tiv thaiv circuits, xws li tsis muaj-load, luv-circuit thiab lwm yam kev tiv thaiv, txwv tsis pub nws yuav hlawv lub switching fais fab mov.
Cov khoom tseem ceeb ntawm ATX fais fab mov
EMI lim Circuit Court: lub luag haujlwm tseem ceeb ntawm EMI lim Circuit Court yog lim tawm cov hluav taws xob sab nraud ntawm cov khoom siv hluav taws xob ntau zaus cuam tshuam ntawm lub zog hluav taws xob, tab sis kuj tseem ua lub luag haujlwm hauv kev txo qis kev hloov hluav taws xob hloov pauv ntawm nws tus kheej mus rau sab nraud ntawm hluav taws xob cuam tshuam. , hauv ** fais fab mov feem ntau muaj ob-ncej EMI lim Circuit Court. Nrog ntau txhiab cov ntsiab lus siab (AC-DC, DC-DC, DC-AC) high-frequency switching power supply, module power supply.
Ib theem ntawm EMI Circuit Court: AC lub hwj chim socket welded rau thawj theem ntawm EMI fais fab lim Circuit Court, uas yog ib tug ywj siab Circuit Court board, yog thawj txheej ntawm circuits tom qab lub input ntawm AC fais fab mov, no low-pass network muaj xws li chokes thiab capacitors. tuaj yeem lim tawm cov teeb meem ntau zaus ntawm cov kab hluav taws xob thiab cov teeb liab cuam tshuam hauv theem, thiab tib lub sijhawm kuj tseem yuav tiv thaiv lub zog ntawm cov teeb liab cuam tshuam sab hauv, tsim cov khoom siv hluav taws xob tiv thaiv hluav taws xob cuam tshuam txoj kab ntawm kev tiv thaiv.
Secondary EMI Circuit Court: hluav taws xob hluav taws xob mus rau hauv lub hwj huam mov thawj zaug los ntawm lub hwj huam mov fuse, thiab tom qab ntawd dua los ntawm inductance thiab capacitance tsim los ntawm channel EMI circuit kom tag nrho lim tawm high-frequency clutter, thiab tom qab ntawd los ntawm tam sim no limiting resistor rau hauv siab. -voltage rectifier lim Circuit Court. Fuses tuaj yeem tshuab thaum lub zog hluav taws xob muaj zog dhau los yog cov khoom siv luv luv los tiv thaiv cov khoom siv hluav taws xob sab hauv, thaum lub zog txwv tam sim no muaj cov khoom siv hlau oxide, uas tuaj yeem txwv qhov tam sim no siab tam sim no thiab txo cov khoom siv hluav taws xob. cov khoom siv sab hauv ntawm qhov cuam tshuam tam sim no.
Choj Rectifier thiab High Voltage Filtering: Cov khoom siv hluav taws xob tom qab EMI lim, thiab tom qab ntawd dhau los ntawm cov kav hlau txais xov rectifier thiab capacitor filtering dhau los ua lub siab-voltage DC. Lub tswv yim AC lub zog rau hauv lub zog DC lub zog, muaj ob daim ntawv, ib qho yog tus choj tag nrho yog plaub lub diodes ntim ua ke, ib qho yog tus choj rectifier Circuit Court nrog plaub discrete diodes, lub luag hauj lwm ntawm tib yam, cov nyhuv yog tib yam.
Feem ntau hais lus, yuav tsum muaj ob lossis ntau dua qhov siab zoo li cov khoom nyob ze ntawm tus choj tag nrho, uas yog, lub zog hluav taws xob electrolytic capacitors, uas nws lub luag haujlwm yog lim tawm cov pulsating DC alternating tam sim no Cheebtsam thiab tso tawm ib tus DC zoo. Kev siv cov high-voltage electrolytic capacitors thiab switching Circuit Court tsim muaj kev sib raug zoo nrog nws lub peev xwm yog feem ntau tsom rau yav dhau los kev ntsuam xyuas fais fab mov, tab sis qhov tseeb nws lub peev xwm thiab lub hwj chim mov tsis muaj dab tsi ua, tab sis nce nws lub peev xwm yuav txo tau. fais fab mov ripple cuam tshuam, txhim kho qhov zoo ntawm cov zis tam sim no ntawm cov khoom siv fais fab.
