Raws li peb paub, tam sim no muaj ob hom PFC, ib qho yog passive PFC (tseem hu ua passive PFC), thiab lwm yam yog hu ua active fais fab mov.(tseem hu ua active PFC).
Passive PFC feem ntau muab faib ua "inductance them hom" thiab "valley-filling circuit type".
"Inductance them nyiaj" yog txhawm rau txo cov theem sib txawv ntawm qhov tseem ceeb tam sim no thiab qhov hluav taws xob ntawm AC input los txhim kho lub zog."Inductance them" suav nrog qhov ntsiag to thiab tsis ntsiag to, thiab lub zog ntawm "inductance them" tsuas yog ncav cuag 0.7 ~ 0.8, uas feem ntau nyob ze ntawm lub tshuab lim dej siab.
"Valley-filling circuit type" belongs rau hom tshiab ntawm passive power factor kho Circuit Court, uas yog tus cwj pwm los ntawm kev siv lub hav-filling circuit tom qab tus choj rectifier kom zoo li qub lub kaum sab xis ntawm lub raj rectifier.Cov mem tes dhau los ua ib qho waveform ze rau sine yoj, thiab lub zog muaj zog tau nce mus txog 0.9.Piv nrog rau cov tsoos inductive passive power factor kho Circuit Court, qhov zoo yog qhov Circuit Court yog qhov yooj yim, lub zog muaj zog yog qhov tseem ceeb, thiab tsis tas yuav siv lub tshuab hluav taws xob loj hauv input circuit.
Covactive PFCyog tsim los ntawm inductors, capacitor, thiab cov khoom siv hluav taws xob.Nws yog qhov me me thiab siv lub siab IC los kho qhov tam sim no waveform los them rau theem sib txawv ntawm cov yuam sij tam sim no thiab voltage.Active PFC tuaj yeem ua tiav lub zog ntau dua, feem ntau txog li 98% lossis ntau dua, tab sis tus nqi siab dua.Tsis tas li ntawd, active PFC kuj tseem siv tau los ua cov khoom siv hluav taws xob.Yog li ntawd, nyob rau hauv kev siv ntawm active PFC circuits, standby transformers feem ntau tsis xav tau, thiab lub ripple ntawm cov zis DC voltage ntawm lub active PFC yog heev me me, thiab qhov no tsis tas yuav tsum tau siv lub lim capacitor ntawm tas li loj muaj peev xwm.
Post lub sij hawm: Dec-17-2021