Ntau yam kev tiv thaiv circuits rau sab hauv cov khoom ntawm DC fais fab mov
Nrog rau kev txhim kho ntawm kev tshawb fawb thiab thev naus laus zis, kev sib raug zoo ntawm cov khoom siv hluav taws xob hluav taws xob thiab tib neeg txoj haujlwm thiab lub neej tau dhau los ua ze, thiab cov khoom siv hluav taws xob tsis tuaj yeem ua yam tsis muaj lub zog siv hluav taws xob. Yog li ntawd, DC hloov cov khoom siv hluav taws xob tau pib ua lub luag haujlwm tseem ceeb thiab tau nkag mus rau ntau yam khoom siv hluav taws xob thiab hluav taws xob. DC hloov khoom siv hluav taws xob tau siv dav hauv kev tswj cov keyboards, kev sib txuas lus, cov khoom siv hluav taws xob tshawb pom hluav taws xob, tswj cov khoom siv hluav taws xob, thiab lwm yam. Tib lub sijhawm, nrog rau kev txhim kho ntau yam thev naus laus zis, suav nrog kev siv tshuab hluav taws xob ntau zaus, soft switching technology, fais fab kev kho tshuab, synchronous rectification technology, ntse tshuab, nto installation technology, thiab lwm yam., switching fais fab mov technology yog tas li innovating, muab ntau yam kev loj hlob qhov chaw rau DC switching fais fab mov. Txawm li cas los xij, vim qhov nyuaj ntawm kev tswj xyuas hauv kev hloov cov khoom siv hluav taws xob, cov khoom siv hluav taws xob thiab cov khoom siv sib xyaw ua ke muaj qhov tsis zoo rau hluav taws xob thiab thermal shocks, uas ua rau muaj kev tsis yooj yim rau cov neeg siv thaum siv. Txhawm rau tiv thaiv kev nyab xeeb ntawm kev hloov hluav taws xob hloov hluav taws xob nws tus kheej thiab kev thauj khoom, raws li cov hauv paus ntsiab lus thiab cov yam ntxwv ntawm DC hloov hluav taws xob, kev tiv thaiv overheating, kev tiv thaiv overcurrent, kev tiv thaiv overvoltage, thiab cov hluav taws xob pib tiv thaiv hluav taws xob tau tsim.
txoj cai ua haujlwm
DC switching fais fab mov muaj xws li ib qho input, ib qho kev hloov hluav taws xob, ib qhov tso zis, thiab ib feem tswj. Lub zog hloov dua siab tshiab yog qhov tseem ceeb ntawm kev hloov hluav taws xob hloov hluav taws xob, uas ua rau lub zog ntau zaus ntawm DC tsis ruaj khov thiab ua tiav qhov kev hloov pauv uas xav tau rau cov zis. Nws tsuas yog muaj qhov hloov pauv hloov pauv thiab lub tshuab hluav taws xob ntau zaus. Daim duab 1 qhia txog schematic daim duab thiab sib npaug schematic daim duab ntawm ib tug DC switching fais fab mov, uas yog tsim los ntawm ib tug tag nrho yoj rectifier, switching transistor V, excitation teeb liab, freewheeling diode Vp, lub zog cia inductor, thiab filtering capacitor C. Qhov tseeb, lub Qhov tseem ceeb ntawm DC hloov fais fab mov yog DC transformer.
yam ntxwv
Txhawm rau ua kom tau raws li qhov xav tau ntawm cov neeg siv khoom, cov chaw tsim khoom loj hloov hluav taws xob hauv tsev thiab thoob ntiaj teb tau cog lus los ua kom sib koom ua ke tsim cov khoom tshiab ntawm cov khoom siv ntse, tshwj xeeb tshaj yog los ntawm kev txhim kho qhov poob ntawm cov khoom siv kho mob thib ob thiab nce kev tsim kho tshiab hauv lub zog ferrite (Mn Zn) cov ntaub ntawv los txhim kho lub peev xwm kom tau txais cov khoom sib nqus siab ntawm cov khoom siv siab thiab siab sib nqus flux densities. Nyob rau tib lub sijhawm, daim ntawv thov ntawm SMT thev naus laus zis tau ua kom muaj kev vam meej hauv cov khoom siv hluav taws xob hloov hluav taws xob, Teem cov khoom ntawm ob sab ntawm lub rooj tsav xwm Circuit Court kom ntseeg tau tias lub zog hloov hluav taws xob yog lub teeb, me me, thiab nyias. Yog li ntawd, txoj kev loj hlob ntawm DC switching fais fab mov yog high-frequency, muaj kev ntseeg siab, tsawg noj, tsis muaj suab nrov, tiv thaiv kev cuam tshuam, thiab modularization.
Qhov tsis zoo ntawm DC switching fais fab mov yog tias nws muaj kev cuam tshuam loj heev thiab tsis muaj peev xwm hloov mus rau qhov chaw hnyav thiab qhov ua txhaum tam sim ntawd. Vim tias qhov sib txawv ntawm cov cuab yeej siv hluav taws xob hauv tsev, cov cuab yeej siv hluav taws xob tsim hluav taws xob thiab cov khoom siv hluav taws xob, thiab cov khoom siv hlau nplaum thiab qee lub teb chaws cov thev naus laus zis, cov cuab yeej siv hluav taws xob ntau lawm ntawm DC hloov hluav taws xob yog qhov nyuaj, kev kho yog teeb meem, thiab tus nqi siab.
Kev tiv thaiv ntawm DC switching fais fab mov
Raws li cov yam ntxwv thiab cov khoom siv hluav taws xob tiag tiag ntawm DC hloov cov khoom siv hluav taws xob, txhawm rau ua kom muaj kev nyab xeeb thiab txhim khu kev lag luam ntawm DC hloov hluav taws xob cov khoom siv nyob rau hauv ib puag ncig hnyav thiab qhov tsis zoo, cov kab lus no tsim ntau yam kev tiv thaiv circuits raws li cov xwm txheej sib txawv.
Overcurrent tiv thaiv Circuit Court
Hauv DC hloov hluav taws xob hloov hluav taws xob, txhawm rau tiv thaiv lub raj hloov ntawm qhov hluav taws kub tawm thaum lub voj voog luv luv lossis tam sim no nce. Cov txheej txheem yooj yim yog los kho cov transistor mus rau qhov rov qab tsis ncaj ncees lub xeev thaum cov zis tam sim no tshaj ib qho nqi, yog li txiav tawm thiab txiav tawm tam sim no. Lub overcurrent tiv thaiv Circuit Court muaj ib tug transistor BG2 thiab ib tug voltage divider resistor R4 thiab R5. Thaum lub voj voog ua haujlwm ib txwm muaj, qhov kev txiav txim siab ntawm R4 thiab R5 ua rau lub hauv paus muaj peev xwm ntawm BG2 siab tshaj qhov muaj peev xwm emitter, thiab cov emitter junction bears thim rov qab voltage. Yog li BG2 yog nyob rau hauv lub xeev txiav tawm (sib npaug rau ib qho qhib Circuit Court), uas tsis muaj kev cuam tshuam rau voltage stabilizing circuit. Thaum lub Circuit Court luv luv, cov zis voltage yog xoom, thiab lub emitter ntawm BG2 yog sib npaug rau hauv av. Yog li ntawd, BG2 yog nyob rau hauv ib tug saturated conduction xeev (sib npaug rau ib tug luv luv Circuit Court), ua lub hauv paus thiab emitter ntawm hloov raj BG1 nyob ze rau ib tug luv luv Circuit Court thiab nyob rau hauv ib tug txiav-tawm lub xeev, txiav tawm lub Circuit Court tam sim no thiab ua tiav cov hom phiaj tiv thaiv.
Overvoltage tiv thaiv Circuit Court
Lub voj voog ntawm kev hloov hluav taws xob tswj hluav taws xob yog qhov nyuaj, thiab cov tswv yim kawg ntawm kev hloov hluav taws xob tswj hluav taws xob feem ntau txuas nrog cov khoom siv lim nrog me me inductance thiab loj capacitance. Thaum lub sijhawm pib, lub lim dej capacitor yuav ntws tawm tam sim no loj, uas tuaj yeem ua tau ob peb zaug ntawm cov khoom siv tam sim no. Xws li ib tug loj surge tam sim no yuav yaj cov kev sib cuag ntawm lub hwj chim zoo tib yam keyboards los yog relays, thiab ua rau lub input fuse tshuab. Tsis tas li ntawd, cov surge tam sim no tuaj yeem ua rau cov capacitors puas, ua rau lawv lub neej luv thiab ua rau muaj kev puas tsuaj ntxov ntxov. Vim li no, lub tam sim no limiting resistor yuav tsum tau txuas nrog thaum pib, thiab lub capacitor yuav tsum tau them los ntawm qhov tam sim no limiting resistor. Txhawm rau tiv thaiv qhov kev txwv tam sim no los ntawm kev siv lub zog ntau dhau, uas tuaj yeem cuam tshuam rau kev ua haujlwm ib txwm muaj ntawm lub tshuab hloov pauv, lub relay yog siv los txiav luv luv Circuit Court nws tom qab cov txheej txheem hloov pauv ntawm kev pib, kom DC fais fab mov ncaj qha khoom siv hluav taws xob. mus rau qhov hloov regulator. Qhov Circuit Court no yog hu ua "soft start" circuit of DC switch power supply.
