Yog vim li cas rau surge tam sim no generated los ntawm switching fais fab mov
Ntawm ntau yam khoom siv hluav taws xob uas nquag siv yav dhau los thiab tam sim no, cov khoom siv hluav taws xob hloov pauv tau nrov heev thiab feem ntau tuaj yeem ua tau raws li cov qauv tsim. Hom kev siv fais fab no yog kev lag luam zoo heev, tab sis kuj tseem muaj qee qhov teeb meem hauv kev tsim qauv. Qhov no yog vim li cas ntau cov khoom siv hluav taws xob hloov hluav taws xob (tshwj xeeb tshaj yog cov khoom siv hluav taws xob hloov hluav taws xob) muaj qhov tsis zoo: lawv yuav tsum tau kos lub zog loj tam sim no. Qhov hluav taws xob tam sim no tuaj yeem ncav cuag 10 mus rau 100 npaug ntawm qhov ua haujlwm zoo li qub ntawm cov khoom siv hluav taws xob. Yog li ntawd, muaj tsawg kawg yog ob qhov teeb meem uas yuav tshwm sim. Ua ntej, yog tias cov khoom siv hluav taws xob DC tsis tuaj yeem muab qhov pib tam sim no txaus, lub zog hloov pauv tuaj yeem nkag mus rau hauv lub xeev kaw thiab tsis tuaj yeem pib; Qhov thib ob, qhov surge tam sim no tuaj yeem ua rau txo qis ntawm cov khoom siv hluav taws xob hluav taws xob, uas txaus ua rau lub zog tsis ua hauj lwm tam sim ntawm lwm cov khoom siv hluav taws xob siv tib lub zog hluav taws xob.
Cov txheej txheem ib txwm siv ntawm kev txwv cov tswv yim surge tam sim no yog los txuas qhov tsis zoo kub coefficient thermistor tam sim no limiting resistor (NTC) hauv series. Txawm li cas los xij, txoj kev yooj yim no muaj ntau qhov tsis zoo: piv txwv li, qhov kev txwv tam sim no ntawm NTC resistor cuam tshuam zoo heev los ntawm qhov kub thiab txias, qhov kev txwv tam sim no tsuas yog ua tiav ib nrab thaum lub tswv yim tseem ceeb ntawm daim phiaj hluav taws xob cuam tshuam rau lub sijhawm luv luv (txog ob peb puas milliseconds), thiab lub hwj chim poob ntawm NTC resistor txo cov conversion efficiency ntawm switching fais fab mov. Qhov tseeb, ob qhov teeb meem tau hais los saum toj no tuaj yeem daws tau los ntawm "soft start circuit", uas yuav tau piav qhia hauv qab no.
Yog vim li cas rau tiam ntawm surge tam sim no nyob rau hauv 1 hloov fais fab mov
Cov input circuits ntawm switching fais fab mov feem ntau yog siv capacitor filtering rectifier circuits. Thaum lub sijhawm kaw cov khoom siv hluav taws xob tuaj, vim qhov pib qhov hluav taws xob ntawm lub capacitor yog xoom, lub zog loj tam sim no yuav raug tsim thaum lub sijhawm them lub capacitor. Tshwj xeeb tshaj yog rau cov khoom siv hluav taws xob hloov hluav taws xob loj, cov khoom siv lim dej loj dua tau siv los ua kom tau txais qhov hluav taws xob tam sim no ntau dua 100A. Thaum lub sij hawm ntawm kev sib txuas ntawm lub hwj chim, xws li ib tug loj surge tam sim no feem ntau yuav ua rau lub input fuse hlawv tawm los yog kev sib cuag ntawm lub kaw hloov mus hlawv tawm, ua rau overcurrent puas tsuaj rau lub rectifier choj; Txawm tias cov teeb ci tuaj yeem ua rau huab cua hloov tsis tau kaw. Tag nrho cov xwm txheej saum toj no yuav ua rau lub zog hloov hluav taws xob tsis ua haujlwm ib txwm. Vim li no, yuav luag tag nrho cov khoom siv hluav taws xob hloov hluav taws xob tau nruab nrog cov hluav taws xob pib hluav taws xob los tiv thaiv cov hluav taws xob tam sim no, txhawm rau ua kom muaj kev ua haujlwm zoo thiab txhim khu kev qha ntawm ob txhais tes neeg hlau fais fab mov.
2. Hluav taws xob ua hauj lwm hauv paus ntsiab lus ntawm soft start circuit
Yog tias "soft start circuit" yog siv los tshem tawm cov surge tam sim no thaum lub sij hawm hloov hluav taws xob pib, nws tuaj yeem zam qhov tsis zoo ntawm cov txheej txheem kev txwv tam sim no uas tau hais los saum toj no. Kev tswj qhov pib ntawm kev hloov hluav taws xob los ntawm "soft start" kom tshem tawm cov hluav taws xob tam sim no suav nrog ob lub hauv paus ntsiab lus: tshem tawm cov khoom thauj thaum lub sijhawm hluav taws xob thiab txwv qhov muaj txiaj ntsig tam sim no. Yog tias lub load tsis tau tsav, qhov tam sim no thaum lub zog hloov hluav taws xob pib feem ntau me me heev. Feem ntau, qhov pib tam sim no yuav tsawg dua li qhov kev ua haujlwm ruaj khov tam sim no uas tau siv los ntawm txoj kev no
