Kev ntsuas los txo ripple thiab suab nrov voltage hauv kev hloov khoom siv hluav taws xob
Piv nrog cov khoom siv hluav taws xob tawm, hloov cov khoom siv hluav taws xob (xws li AC / DC converters, DC / DC converters, AC / DC modules, thiab DC / DC modules) muaj qhov zoo tshaj plaws ntawm kev hloov pauv siab, uas feem ntau tuaj yeem ncav cuag 8{{7 } } feem pua rau 85 feem pua , thiab mus txog 90 feem pua rau 97 feem pua ; Qhov thib ob, lub zog hloov hluav taws xob siv lub tshuab hluav taws xob ntau zaus hloov pauv lub zog loj zaus hloov pauv, uas tsis yog tsuas yog txo qhov hnyav, tab sis kuj txo qhov ntim, ua rau muaj kev siv ntau ntxiv. Txawm li cas los xij, qhov tsis zoo ntawm kev hloov hluav taws xob yog tias nws hloov pauv transistor ua haujlwm nyob rau hauv high-frequency switching xeev, thiab cov zis ripple thiab suab nrov voltage kuj loj, feem ntau nyob ib ncig ntawm 1 feem pua ntawm cov zis voltage (qhov qis yog li ntawm 0.5 feem pua. tso zis voltage). Cov khoom zoo tshaj plaws kuj muaj ripple thiab suab nrov voltage ntawm kaum ntawm mV; Kev hloov lub raj ntawm cov khoom siv hluav taws xob linear ua haujlwm nyob rau hauv lub xeev linear, tsis muaj ripple voltage, thiab cov suab nrov tawm suab kuj me me, nrog rau chav tsev ntawm μ V.
Kab lus no luv luv qhia txog cov laj thawj thiab kev ntsuas ntawm ripple thiab suab nrov tsim los ntawm kev hloov cov khoom siv hluav taws xob, ntsuas cov cuab yeej ntsuas, ntsuas cov qauv, thiab kev ntsuas kom txo qis ripple thiab suab nrov.
1, Yog vim li cas rau ripple thiab suab nrov tiam:
Cov zis hluav taws xob hloov pauv tsis yog DC voltage, tab sis muaj qee yam AC hauv, uas yog tshwm sim los ntawm ripple thiab suab nrov. Ripple yog qhov hloov pauv ntawm qhov tso zis DC voltage, uas cuam tshuam nrog kev hloov pauv ntawm lub zog hloov hluav taws xob. Nyob rau hauv txhua txoj kev qhib thiab kaw, hluav taws xob hluav taws xob yog "tso" los ntawm qhov kawg ntawm cov khoom siv mus rau qhov kawg ntawm cov zis, tsim cov txheej txheem ntawm kev them nyiaj thiab tawm, uas ua rau muaj kev hloov pauv ntawm cov zis hluav taws xob, nrog cov zaus zoo ib yam li qhov zaus ntawm qhov hloov. Ripple voltage yog lub ncov rau ncov tus nqi nruab nrab ntawm lub ncov thiab hav ntawm lub ripple, thiab nws qhov loj yog cuam tshuam nrog lub peev xwm thiab qhov zoo ntawm cov tswv yim thiab cov zis capacitors ntawm lub zog hloov pauv.
Muaj ob qhov laj thawj rau lub suab nrov: ib qho yog tsim los ntawm kev hloov hluav taws xob hloov nws tus kheej; Lwm hom yog cuam tshuam los ntawm sab nraud electromagnetic teb (EMI), uas tuaj yeem nkag mus rau lub zog hloov hluav taws xob los ntawm hluav taws xob lossis cov tswv yim los ntawm cov kab hluav taws xob. Lub suab nrov tsim los ntawm lub zog hloov hluav taws xob nws tus kheej yog lub tsheb ciav hlau ceev ceev uas tshwm sim los ntawm cov pulses ntse tsim thaum lub sijhawm hloov pauv thiab txiav tawm, tseem hu ua kev hloov suab nrov. Qhov zaus ntawm lub suab nrov pulse tsheb ciav hlau yog ntau dua li qhov hloov zaus, thiab lub suab nrov nrov yog nws qhov siab tshaj plaws rau cov nqi siab tshaj. Lub amplitude ntawm lub suab nrov voltage feem ntau muaj feem xyuam rau lub topology ntawm lub switching fais fab mov, lub parasitic xeev nyob rau hauv lub Circuit Court, thiab tus tsim ntawm lub PCB.
2, Kev ntsuas los txo qis ripple thiab suab nrov voltage:
Ntxiv nrog rau kev hloov suab nrov, qhov hloov hluav taws xob hloov hluav taws xob nyob rau hauv AC / DC converter tau ua tiav yoj rectification thiab capacitor filtering, thiab tam sim no waveform yog mem tes, raws li qhia nyob rau hauv daim duab 17 (Daim duab ib qhia tag nrho yoj rectification thiab filtering circuit, thiab b qhia qhov voltage thiab tam sim no waveforms). Muaj ntau dua kev txiav txim siab nyob rau hauv lub waveform tam sim no, uas yuav ua rau kom lub suab nrov. Kev hloov pauv hluav taws xob zoo (AC / DC converter) tau ntxiv lub zog hloov kho (PFC) hauv Circuit Court, ua rau cov zis tam sim no kwv yees li sine yoj, txo cov kev txiav txim siab sib haum xeeb, thiab ua kom lub zog muaj zog nyob ib puag ncig {{3} }.95, txo cov pa phem rau hauv daim phiaj fais fab.
