Ua hauj lwm hauv paus ntsiab lus ntawm zaus converter hloov fais fab mov
Cov txheej txheem ua haujlwm ntawm lub zog hloov hluav taws xob yog qhov yooj yim to taub. Nyob rau hauv linear fais fab mov, lub hwj chim transistor yog ua nyob rau hauv linear hom. Tsis zoo li cov khoom siv hluav taws xob tawm, PWM hloov hluav taws xob ua haujlwm ntawm lub zog hluav taws xob hauv ob lub xeev thiab sab nraud. Hauv ob lub xeev no, cov khoom lag luam volt ampere ntxiv rau lub hwj chim transistor yog qhov me me (tsis tshua muaj hluav taws xob thiab siab tam sim no thaum lub sijhawm ua haujlwm, siab voltage thiab qis tam sim no thaum kaw) / volt ampere khoom ntawm lub hwj chim ntaus ntawv yog qhov poob generated ntawm lub hwj chim. khoom siv semiconductor.
Piv nrog rau cov khoom siv hluav taws xob linear, cov txheej txheem ua haujlwm zoo dua ntawm PWM hloov cov khoom siv hluav taws xob tau ua tiav los ntawm "taws", uas chops cov tswv yim DC voltage rau hauv ib qho hluav taws xob hluav taws xob nrog lub amplitude sib npaug ntawm cov input voltage amplitude.
Lub luag haujlwm lub voj voog ntawm cov mem tes yog hloov kho los ntawm tus maub los ntawm lub zog hloov hluav taws xob. Thaum cov input voltage raug txiav mus rau hauv AC square nthwv dej, nws qhov amplitude tuaj yeem nce lossis txo los ntawm kev hloov pauv. Los ntawm kev nce tus naj npawb ntawm cov windings nyob rau hauv lub transformer, qhov tso zis voltage tus nqi yuav nce. Thaum kawg, cov AC waveforms no tau kho thiab lim kom tau txais DC tso zis voltage.
Lub hom phiaj tseem ceeb ntawm tus maub los yog tswj kom ruaj khov cov zis hluav taws xob, thiab nws cov txheej txheem ua haujlwm zoo ib yam li cov maub los linear. Uas yog hais tias, cov kev ua haujlwm blocks, kev siv hluav taws xob, thiab qhov yuam kev amplifier ntawm tus maub los tuaj yeem tsim kom zoo ib yam li cov kab hluav taws xob. Lawv qhov txawv yog tias qhov tso zis ntawm qhov yuam kev amplifier (yuam kev voltage) yuav tsum tau mus los ntawm qhov voltage / mem tes dav converter ua ntej tsav lub hwj chim transistor.
Hloov cov khoom siv hluav taws xob muaj ob txoj haujlwm tseem ceeb: kev hloov pauv mus rau pem hauv ntej thiab txhawb kev hloov pauv. Txawm tias lawv
