cov ntsiab lus tseem ceeb ntawm kev hloov hluav taws xob
Taw qhia txog kev hloov hluav taws xob
Cov txheej txheem ua haujlwm ntawm kev hloov hluav taws xob hloov pauv tau yooj yim to taub, thiab nws muaj peb qhov sib txawv:
Hloov: Lub zog hluav taws xob ua haujlwm nyob rau hauv lub xeev hloov tsis yog lub xeev linear
High zaus: lub zog hluav taws xob cov khoom siv hluav taws xob ua haujlwm ntawm cov zaus ntau zaus es tsis txhob tsawg zaus ze rau kev lag luam zaus
DC: Lub tshuab hluav taws xob hloov hluav taws xob tso tawm DC hloov AC, thiab tseem tuaj yeem tso zis ntau zaus AC xws li hluav taws xob hloov hluav taws xob.
Basic Cheebtsam ntawm switching fais fab mov
Switching power supply classification:
Hloov fais fab mov muab faib ua ntau hom raws li topology: phaw boost rau pem hauv ntej flyback ib nrab-bridge full-bridge LLC, thiab lwm yam, tab sis nyob rau hauv lub essence, tsuas muaj ob hom kev ua hauj lwm ntawm switching fais fab mov: pem hauv ntej: nws kis tau lub zog thaum lub hloov lub raj yog qhib, thiab flyback: Lub zog yog pauv thaum lub qhov hluav taws xob tawm.
Kev ntsuas hluav taws xob tseem ceeb:
Lub zog hloov dua siab tshiab yog ib feem tseem ceeb ntawm kev tsim, thiab nws cov txheej txheem tsim feem ntau suav nrog kev xaiv cov khoom siv hluav taws xob thiab kev tsim cov hloov pauv hloov pauv. Ntawm lawv, kev tsim cov hloov pauv hloov pauv yog qhov tseem ceeb tshaj plaws ntawm kev tsim ua haujlwm ntawm kev hloov cov khoom siv hluav taws xob. Cov qauv tsim tau ncaj qha txiav txim siab qhov ua tau zoo ntawm kev hloov cov khoom siv hluav taws xob. Daim ntawv no mas Piav lub hauv paus ntsiab lus ntawm Circuit Court.
hluav taws xob tiv thaiv Circuit Court
1. Nyob rau hauv cov ntaub ntawv ntawm ib tug luv luv Circuit Court nyob rau hauv lub output davhlau ya nyob twg, lub PWM tswj Circuit Court yuav txwv tsis pub cov zis tam sim no nyob rau hauv ib tug muaj kev ruaj ntseg. Nws tuaj yeem siv ntau txoj hauv kev kom paub txog qhov kev txwv tam sim no. Thaum lub hwj chim tam sim no limiting tsis ua hauj lwm nyob rau hauv ib tug luv luv Circuit Court, tsuas yog ntxiv ib co circuits.
EMI Generation Mechanism thiab Restraint of Switching Power Supply
Hloov cov khoom siv hluav taws xob tau tsim kho sai heev hauv cov kev taw qhia ntawm kev ua haujlwm siab thiab ua haujlwm siab. EMI kev tawm tsam tau dhau los ua qhov taw qhia tseem ceeb ntawm kev hloov hluav taws xob tsim qauv. Electromagnetic cuam tshuam (EMI) yog qhov tsis muaj electromagnetic compatibility. Nws yog lub zog hluav taws xob puas tsuaj los ntawm ib qho khoom siv hluav taws xob mus rau lwm qhov los ntawm kev sib txuas lossis hluav taws xob. txheej txheem ntaus ntawv. Nyob rau hauv xyoo tas los no, kev hloov hluav taws xob hloov pauv tau tsim sai heev vim nws qhov zoo ntawm kev siv ntau zaus, kev ua haujlwm siab, me me thiab cov zis ruaj khov. Hloov cov khoom siv hluav taws xob tau maj mam hloov cov khoom siv hluav taws xob tawm thiab tau dav siv hauv computer, kev sib txuas lus, kev tswj tsis siv neeg, khoom siv hauv tsev thiab lwm yam. Txawm li cas los xij, vim hais tias lub zog hloov hluav taws xob ua haujlwm hauv lub xeev siab thiab nws qhov siab di / dt thiab siab dv / dt, lub zog hloov hluav taws xob muaj qhov tsis txaus ntseeg - nws yooj yim los tsim cov teeb liab muaj zog electromagnetic cuam tshuam (EMI). EMI cov cim tsis tsuas yog muaj ntau zaus, tab sis kuj muaj qee qhov amplitude, uas yuav ua rau cov khoom siv hluav taws xob tsis zoo los ntawm kev siv hluav taws xob thiab hluav taws xob, thiab ua rau muaj kev cuam tshuam rau cov khoom siv sib txuas lus thiab cov khoom siv hluav taws xob. Yog li ntawd, yuav ua li cas txo lossis txawm tias tshem tawm qhov teeb meem EMI hauv kev hloov hluav taws xob hloov pauv tau dhau los ua qhov teeb meem uas cov neeg tsim hluav taws xob hloov hluav taws xob muaj kev txhawj xeeb heev. Kab lus no tsom rau plaub txoj hauv kev ntawm kev txwv EMI ntawm kev hloov cov raj thiab diodes hauv kev hloov cov khoom siv hluav taws xob.
