Ua hauj lwm hauv paus ntsiab lus ntawm lub hwj chim mov Peb tej yam kev mob ntawm lub hwj chim mov
Lub hauv paus ntsiab lus ua haujlwm ntawm lub zog hloov hluav taws xob yog qhov yooj yim to taub. Nyob rau hauv ib tug linear fais fab mov, lub hwj chim transistor ua hauj lwm nyob rau hauv ib tug linear hom. Tsis zoo li cov khoom siv hluav taws xob tawm, PWM hloov hluav taws xob tso cai rau lub hwj chim transistor ua haujlwm nyob rau hauv ob qho tib si rau hauv thiab tawm, cov khoom volt ampere ntxiv rau lub hwj chim transistor yog me me (thaum lub sij hawm conduction, voltage yog tsawg thiab tam sim no siab; Thaum lub sij hawm kaw, qhov voltage yog siab thiab tam sim no yog tsawg) / volt ampere khoom ntawm lub hwj chim ntaus ntawv yog qhov poob generated ntawm lub hwj chim semiconductor ntaus ntawv.
Txoj haujlwm ua haujlwm ntawm kev hloov hluav taws xob
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 ua hauj lwm nyob rau hauv linear hom. Tsis zoo li cov khoom siv hluav taws xob tawm, lub pWM hloov hluav taws xob tso cai rau lub hwj chim transistor ua haujlwm nyob rau hauv ob qho tib si rau hauv thiab tawm, cov khoom volt ampere ntxiv rau lub hwj chim transistor yog me me (thaum lub sij hawm conduction, voltage yog tsawg thiab tam sim no siab; Thaum lub sij hawm kaw, qhov voltage yog siab thiab tam sim no yog tsawg) / volt ampere khoom ntawm lub hwj chim ntaus ntawv yog qhov poob generated ntawm lub hwj chim semiconductor ntaus ntawv. 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 input DC voltage rau hauv qhov hluav taws xob pulse nrog ib qho amplitude sib npaug ntawm qhov 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 transformer. Los ntawm kev nce tus naj npawb ntawm cov windings nyob rau hauv lub transformer, tus naj npawb ntawm cov zis voltage pawg tuaj yeem nce ntxiv. 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 cov zis hluav taws xob ruaj khov, thiab nws cov txheej txheem kev ua haujlwm zoo ib yam li cov maub los linear. Qhov ntawd yog hais tias, kev ua haujlwm thaiv, 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. Qhov sib txawv ntawm lawv yog tias qhov tso zis ntawm qhov yuam kev amplifier (qhov yuam kev voltage) yuav tsum dhau los ntawm qhov voltage / mem tes dav hloov pauv chav ua ntej tsav lub zog transistor. Muaj ob hom kev ua haujlwm tseem ceeb ntawm kev hloov hluav taws xob: kev hloov pauv mus rau pem hauv ntej thiab txhawb kev hloov pauv. Txawm hais tias qhov sib txawv ntawm qhov sib txawv ntawm lawv qhov sib txawv me me, cov txheej txheem ua haujlwm sib txawv heev thiab txhua tus muaj nws tus kheej zoo hauv cov ntawv thov tshwj xeeb.
Peb tej yam kev mob rau kev hloov fais fab mov
hloov
Cov khoom siv hluav taws xob hluav taws xob ua haujlwm hauv lub xeev hloov pauv tsis yog lub xeev linear
siab zaus
Cov khoom siv hluav taws xob hluav taws xob ua haujlwm ntawm cov khoom siv hluav taws xob ntau dua li nyob ze ntawm lub zog zaus ntawm cov zaus tsawg
ncaj qha tam sim no
Hloov cov khoom siv hluav taws xob tso tawm DC hloov AC, thiab tseem tuaj yeem tso zis ntau zaus AC, xws li hluav taws xob transformers
