xov xwm

Hloov lub zogcov khoom siv tau dav siv hauv kev tsim khoom thiab kev ua neej, thiab yog ib feem tseem ceeb ntawm kev tsim khoom siv hluav taws xob.Cov khoom siv hluav taws xob hloov pauv me me, lub teeb thiab ua haujlwm tau zoo, tab sis koj puas yuav tsum paub txog qhov hloov pauv hluav taws xob?Kab lus no yuav piav qhia lub ntsiab lus ntawm kev hloov hluav taws xob thiab lub hauv paus ntsiab lus ntawm kev hloov hluav taws xob hauv kev nthuav dav los pab koj zoo dua tus tswv hloov hluav taws xob.
Ua ntej, dab tsi yog switching fais fab mov.
Kev hloov pauv hluav taws xob yog kev siv cov khoom siv hloov pauv (xws li cov raj hluav taws xob, cov nyhuv transistors, thyristor thyristors, thiab lwm yam), raws li lub voj voog tswj, cov khoom siv hluav taws xob hloov mus txuas ntxiv thiab muab tua.
Lub zog hloov hluav taws xob yog txheeb ze rau cov khoom siv hluav taws xob linear.Nws plug-in davhlau ya nyob twg tam sim ntawd converts AC rectifier rau hauv DC fais fab mov, thiab tom qab ntawd, nyob rau hauv cov nyhuv ntawm ib tug high-frequency resonant Circuit Court, siv lub hwj chim hloov mus rau manipulate lub conduction ntawm AC zog los tsim ib tug high-frequency surge tam sim no. .Nrog kev pab los ntawm ib tug inductor (transformer kauj), ib tug du-voltage DC fais fab mov yog tso zis.Vim hais tias cov ntsiab lus tseem ceeb ntawm transformer yog inversely proportional rau square meter ntawm cov zis fais fab, qhov ntau zaus, qhov me me ntawm transformer core.Qhov no tuaj yeem txo qhov transformer zoo heev thiab yooj yim rau tag nrho qhov hnyav thiab ntim ntawm cov khoom siv fais fab.Thiab, vim tias nws tam sim ntawd tswj hwm DC, hom khoom siv hluav taws xob no tau zoo dua li cov khoom siv hluav taws xob tawm.Qhov no txuag hluav taws xob hluav taws xob thiab yog li nrov nrog peb.Tab sis nws kuj yog flawed.Kev hloov hluav taws xob hloov hluav taws xob yog qhov nyuaj, kev saib xyuas tsis yooj yim, thiab ib puag ncig muaj kuab paug ntawm lub zog hluav taws xob Circuit Court yog qhov hnyav heev.Lub hwj chim mov tsis muaj suab nrov, thiab nws tsis xis nyob siv qee qhov hluav taws xob qis hluav taws xob.
Lub linear fais fab mov ua ntej txo qhov amplitude ntawm AC voltage raws li lub transformer, ces tau ib leeg-mem tes DC fais fab mov raws li tus choj rectifier Circuit Court rectifier, thiab ces tau ib tug DC voltage uas muaj ib tug me me ripple voltage raws li filtering.Txhawm rau kom ua tiav qhov siab tshaj plaws DC voltage, nws yog ib qho tsim nyog los tsim ib lub raj Zener raws li kev tswj hwm lub zog hluav taws xob.
Qhov thib ob, lub hauv paus ntsiab lus ntawm kev hloov fais fab mov.
Tag nrho cov txheej txheem ntawm kev ua haujlwm ntawm lub zog hloov hluav taws xob yog qhov yooj yim to taub.Nyob rau hauv ib tug linear fais fab mov, ua rau cov zis fais fab raj network ua hauj lwm.Tsis zoo li cov khoom siv hluav taws xob tawm, PWM hloov cov khoom siv hluav taws xob khaws cov khoom siv hluav taws xob tso tawm thiab tawm.Hauv ob qhov xwm txheej no, qhov sib npaug ntawm volt-ampere ntxiv rau ntawm qhov tso zis hluav taws xob lub raj yog qhov me me (qhov hluav taws xob tsawg thiab qhov tam sim no loj thaum nws raug tua; qhov hluav taws xob siab thiab qhov tam sim no me me thaum nws raug tua. ) / volt-ampere ntawm lub zog hluav taws xob cov khoom siv hluav taws xob Kev sib faib ntawm cov yam ntxwv nkhaus yog kev puas tsuaj rau cov khoom siv hluav taws xob semiconductor.
Piv nrog rau cov khoom siv hluav taws xob tawm, qhov sib txuas ua haujlwm tsim nyog ntawm PWM hloov hluav taws xob tau ua tiav raws li lub inverter, thiab DC qhov hluav taws xob yuav tsum tau muab txiav rau hauv ib qho hluav taws xob hluav taws xob uas nws qhov amplitude tus nqi sib npaug rau qhov input voltage amplitude tus nqi. .
Thib peb, qhov zoo thiab qhov tsis zoo ntawm kev hloov fais fab mov:
Qhov tshwj xeeb zoo ntawm kev hloov hluav taws xob: me me, lub teeb yuag (ntim thiab tag nrho qhov hnyav tsuas yog 20 ~ 30% ntawm cov khoom siv hluav taws xob), kev ua haujlwm siab (feem ntau 60 ~ 70%, thaum linear fais fab mov tsuas yog 30 ~ 40%) , los tiv thaiv kev cuam tshuam muaj peev xwm, dav tso zis hluav taws xob, kev tsim qauv tsim.
Qhov tshwj xeeb tsis xws luag ntawm cov khoom siv hluav taws xob hloov pauv: vim tias lub tshuab hluav taws xob rectifier ua rau muaj qhov hluav taws xob ntau zaus, nws muaj qee yam cuam tshuam rau cov chaw nyob ib puag ncig.Kev tiv thaiv zoo thiab hauv av yuav tsum tau khaws cia.
AC tam sim no tuaj yeem dhau los ntawm lub rectifier kom tau txais DC lub zog.Raws li txhua tus paub, vim yog qhov hloov pauv ntawm AC voltage thiab qhov thauj khoom tam sim no, DC voltage tau txais tom qab lub rectifier feem ntau ua rau qhov hloov pauv ntawm 20% mus rau 40%.Txhawm rau kom tau txais qhov ruaj khov DC voltage zoo dua, nco ntsoov siv lub tshuab hluav taws xob tswj hluav taws xob kom ua tiav lub raj zener.Raws li cov kev sib txawv ua tiav, qhov voltage regulator raj fais fab mov yuav muab faib ua peb hom: linear voltage regulator raj fais fab mov, theem tswj voltage regulator fais fab mov thiab switching regulator raj fais fab mov.Hloov fais fab mov txhais tau tias txoj kev loj hlob ntawm ntsuab ib puag ncig tiv thaiv thiab zoo heev fais fab mov.
Plaub, cov teeb meem tshwm sim thaum xaiv lub tshuab hluav taws xob hloov pauv.
(1) Xaiv tus qauv tsim nyog input voltage specification;
(2) Xaiv lub hwj chim tsim nyog.Txhawm rau ua kom lub neej zoo dua ntawm cov khoom siv hluav taws xob, koj tuaj yeem xaiv tus qauv nrog lub zog ntsuas siab tshaj 30%.
(3) Muab rau hauv tus account lub load yam ntxwv.Yog hais tias lub load yog lub cev muaj zog, lub teeb lub teeb los yog lub capacitor load, thiab tam sim no kuj loj heev thaum lub sij hawm ua hauj lwm, ib tug tsim nyog lub hwj chim mov yuav tsum tau xaiv los tiv thaiv lub load.Yog hais tias lub load yog lub cev muaj zog, qhov voltage reversal ntawm shutdown yuav tsum tau txiav txim siab.
(4) Tsis tas li ntawd, kev ua haujlwm kub ntawm lub zog hluav taws xob thiab seb nws puas muaj cov khoom siv cua txias ntau dhau yuav tsum tau txiav txim siab.Kev ntsuas kub ntau dhau qhov ntsuas hluav taws xob yuav tsum txo qhov tso zis.Kub txo hwj chim nkhaus.
(5) Ntau yam haujlwm yuav tsum raug xaiv raws li kev siv:
Kev tu vaj tse: Kev Tiv Thaiv Tshaj Tawm (OVP), Kev Tiv Thaiv Kub (OTP), Kev Tiv Thaiv Tshaj Tawm (OLP), thiab lwm yam.
Daim ntawv thov muaj nuj nqi: cov ntaub ntawv teeb liab muaj nuj nqi (ib txwm siv hluav taws xob faib, tsis siv hluav taws xob faib), chaw taws teeb tswj kev ua haujlwm, saib xyuas muaj nuj nqi, kev sib txuas ua ke, thiab lwm yam.
Cov yam ntxwv tshwj xeeb: Fais Fab Kev Kho Kom Zoo (PFC), Lub Hwj Chim Nruam (UPS)
Xaiv qhov yuav tsum tau muaj kev ruaj ntseg thiab EMC kev ua tau zoo (EMC) pov thawj.