Basic Cheebtsam ntawm AC / DC switching fais fab mov
● Hloov Circuit Court
Lub tshuab hluav taws xob hloov hluav taws xob feem ntau yog tsim los ntawm cov raj hloov pauv thiab cov tshuab hluav taws xob ntau zaus. Muaj kev faib tawm ntawm lub raj hloov pauv thiab nws lub dab dej kub, thiab cov coj hauv tsev thiab lub zog. Lub du / dt generated los ntawm nws muaj ib tug loj amplitude mem tes, ib tug dav zaus band, thiab nplua nuj harmonics. Lub load ntawm lub hloov raj yog thawj kauj ntawm lub high-frequency transformer, uas yog ib tug inductive load. Thaum lub hwj chim hloov lub raj raug muab tua, qhov xau inductance ntawm high-frequency transformer generates ib tug rov qab electromotive quab yuam E=- LDi / dt, uas yog proportional rau tus nqi ntawm cov kev hloov ntawm lub collector tam sim no thiab cov leakage inductance. , thiab yog superimposed rau ntawm qhov hluav taws xob tua hluav taws xob los tsim qhov hluav taws xob tua hluav taws xob, yog li tsim kev cuam tshuam kev cuam tshuam.
Lub rectifier diode ntawm lub rectifier Circuit Court
Thaum cov zis rectifier diode raug muab tua, muaj qhov rov qab tam sim no, thiab lub sijhawm nws yuav siv sij hawm rov qab mus rau xoom yog cuam tshuam nrog rau yam xws li junction capacitance. Nws yuav tsim cov kev hloov pauv tseem ceeb tam sim no di / dt thiab muaj zog ntau zaus cuam tshuam los ntawm kev cuam tshuam ntawm transformer to inductance thiab lwm yam kev faib tawm, nrog ntau zaus mus txog ntau kaum ntawm megahertz.
● Kev tsis ncaj ncees
Vim yog ua haujlwm ntawm ntau zaus, cov yam ntxwv ntawm cov khoom siv tsawg zaus hauv cov khoom siv hluav taws xob hloov pauv yuav hloov, ua rau lub suab nrov. Nyob rau hauv high zaus, cov kev tsis sib haum xeeb muaj kev cuam tshuam loj rau cov yam ntxwv ntawm kev sib txuas ntawm cov channel, thiab cov khoom siv hluav taws xob faib ua cov channel rau electromagnetic cuam tshuam.
Sab nraud cuam tshuam qhov chaw
Kev cuam tshuam sab nraud tuaj yeem muab faib ua hluav taws xob cuam tshuam thiab kev cuam tshuam xob laim, nrog lub zog cuam tshuam uas muaj nyob rau hauv ob qho tib si "hom" thiab "differential mode" hom. Nyob rau tib lub sijhawm, vim qhov kev sib txuas ncaj qha ntawm AC lub zog hluav taws xob mus rau tus choj rectifier thiab filtering Circuit Court, tsuas yog lub sij hawm ncov ntawm qhov hluav taws xob input voltage muaj input tam sim no nyob rau hauv ib nrab ntawm lub voj voog, uas ua rau lub zog input tsawg heev ntawm lub hwj chim. muab khoom (kwv yees 0.6). Ntxiv mus, qhov tam sim no muaj ntau cov khoom sib haum xeeb, uas tuaj yeem ua rau muaj kev sib haum xeeb "kev ua qias tuaj" rau hauv daim phiaj fais fab.
