Nrov science paub txog kev hloov fais fab mov
Los ntawm lub voj voog, lub raj hloov pauv tau tswj kom ua kom muaj kev kub ceev rau thiab tawm. Cov tam sim no ncaj qha hloov mus rau hauv high-frequency alternating tam sim no thiab nkag mus rau lub transformer rau transformation, yog li tsim ib los yog ntau pawg ntawm voltages xav tau!
Hloov fais fab mov tuaj yeem faib ua ob hom: cais thiab tsis cais. Hom kev rho tawm yuav tsum muaj qhov hloov pauv hloov pauv, tab sis hom tsis cais tawm yuav tsis tas muaj nws.
Lub hauv paus ntsiab lus ua haujlwm ntawm kev hloov hluav taws xob yog:
1. AC fais fab input yog rectified thiab lim rau DC;
2. Tswj lub raj hloov los ntawm lub siab zaus PWM (mulse width modulation) teeb liab, thiab ntxiv DC mus rau thawj qhov kev hloov pauv hloov;
3. Qhov thib ob ntawm kev hloov pauv hloov induces high-frequency voltage, uas yog nkag mus rau lub load los ntawm rectification thiab filtering;
4. Cov khoom tso tawm yog pub rov qab mus rau qhov kev tswj xyuas los ntawm ib qho kev sib txuas los tswj PWM lub luag haujlwm piv, thiaj li ua tiav lub hom phiaj ntawm cov zis ruaj khov. Thaum AC lub zog nkag, nws feem ntau dhau los ntawm qee yam xws li lub voj tam sim no los lim tawm qhov cuam tshuam ntawm lub hwj chim-tawm network, thiab tib lub sijhawm, nws kuj lim tawm qhov cuam tshuam ntawm cov khoom siv hluav taws xob ntawm daim phiaj hluav taws xob;
Nyob rau 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 ua rau lub raj hloov pauv;
Qhov thib ob ntawm kev hloov pauv hloov pauv tuaj yeem muaj ntau yam windings lossis ib qho winding muaj ntau cov kais dej kom tau txais cov khoom tsim nyog;
Feem ntau, qee qhov kev tiv thaiv hluav taws xob yuav tsum tau ntxiv, xws li tsis muaj kev thauj khoom thiab kev tiv thaiv luv luv, txwv tsis pub cov khoom siv hluav taws xob hloov pauv yuav raug hlawv.
Nrov science paub txog kev hloov 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 qhov cuam tshuam ntawm cov pa hluav taws xob ntau ntawm cov hluav taws xob sab nraud rau cov khoom siv hluav taws xob, thiab tib lub sijhawm txo cov hluav taws xob cuam tshuam ntawm kev hloov hluav taws xob nws tus kheej mus rau sab nraud. Feem ntau, muaj ob-ncej EMI lim circuits hauv * * fais fab mov. Muaj ntau txhiab tus thev naus laus zis (AC-DC, DC-DC, DC-AC) cov khoom siv hluav taws xob hloov hluav taws xob thiab cov khoom siv hluav taws xob.
EMI Circuit Court: lub qhov hluav taws xob AC yog welded nrog ** EMI lub hwj chim lim Circuit Court, uas yog ib tug ywj siab Circuit Court board thiab ib tug * * pab pawg neeg ntawm circuits tom qab AC zog input. Qhov no low-pass network uas muaj choke thiab capacitor tuaj yeem lim tawm cov kev cuam tshuam ntau zaus thiab nyob rau theem cuam tshuam ntawm cov kab hluav taws xob, thiab tib lub sijhawm tiv thaiv cov teeb meem cuam tshuam hauv lub zog hluav taws xob, yog li tsim cov kab hluav taws xob tiv thaiv hluav taws xob. lub zog mov.
Thawj kab ntawm kev tiv thaiv.
Secondary EMI Circuit Court: tom qab lub mains fais fab nkag mus rau hauv lub hwj chim board, nws thawj zaug dhau los ntawm lub hwj chim fuse, ces dhau los ntawm * * channel EMI Circuit Court muaj li ntawm inductor thiab capacitor kom tag nrho lim tawm high-frequency clutter, thiab ces dhau los ntawm tam sim no. -limiting resistor nkag mus rau high-voltage rectification lim circuit. Lub fuse tuaj yeem raug tshuab thaum lub zog hluav taws xob siab dhau los yog cov khoom siv luv luv, txhawm rau tiv thaiv cov khoom siv hluav taws xob sab hauv. Tam sim no-txheej resistor muaj hlau oxide Cheebtsam, uas tuaj yeem txwv qhov tam sim no loj tam sim no thiab txo qhov cuam tshuam tam sim no ntawm lub zog hluav taws xob ntawm cov khoom siv sab hauv.
Choj rectifier thiab high-voltage filtering: lub lag luam fais fab lim los ntawm EMI hloov mus rau high-voltage DC tom qab tag nrho-bridge rectification thiab capacitor filtering. Tam sim no, muaj ob txoj hauv kev los hloov alternating tam sim no ntawm cov tswv yim kawg rau hauv cov khoom siv hluav taws xob. Ib qho yog txhawm rau pob plaub lub diodes ua ke hauv ib tus choj tag nrho, thiab lwm qhov yog los tsim ib tus choj rectifier Circuit Court nrog plaub lub diodes discrete, uas muaj cov nyhuv tib yam thiab cov nyhuv 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, cov khoom siv hluav taws xob hluav taws xob siab, uas yog siv los lim tawm AC cov khoom ntawm pulsating DC thiab cov zis kuj ruaj khov DC. Kev siv cov high-voltage electrolytic capacitor yog ze ze rau kev tsim ntawm switching Circuit Court, thiab nws lub peev xwm yog feem ntau yog lub hom phiaj ntawm kev ntsuam xyuas fais fab mov yav dhau los, tab sis qhov tseeb nws lub peev xwm tsis muaj dab tsi cuam tshuam nrog lub hwj chim mov, tab sis nce nws. muaj peev xwm yuav txo tau ripple cuam tshuam ntawm lub hwj chim mov thiab txhim kho cov zis tam sim no zoo ntawm lub hwj chim mov.
