Qhov sib txawv ntawm kev hloov fais fab mov thiab tswj fais fab mov
Muaj ntau ntau hom kev tswj fais fab mov, series-hom tswj fais fab mov los ntawm lub hwj chim transformer, rectifier Cheebtsam, lim capacitors, kho cov khoom (kho raj los yog Sanrui regulator), siv voltage, sampling network, piv amplification thiab overload los yog luv luv Circuit Court. kev tiv thaiv thiab lwm yam kev sib txuas. thiab lwm yam), siv voltage, sampling network, sib piv amplification, raws li zoo raws li overload los yog luv-circuit tiv thaiv thiab lwm yam ua ke. Raws li cov series-hom tswj fais fab mov yog ib tug linear voltage regulator Circuit Court, thiab lub hloov raj nyob rau hauv lub regulator.
regulator nyob rau hauv lub regulated voltage ces. Nws qhov tsis zoo yog kev siv hluav taws xob loj, kev ua haujlwm tsawg thiab qhov tsawg ntawm qhov kev tso cai ntawm daim phiaj sib txawv. Cov kab hluav taws xob tswj hluav taws xob dav dav tso cai rau kev hloov pauv ntawm kab sib chaws ntawm (220 ± 22) V. Txhawm rau txo qis kev siv hluav taws xob thiab txhim kho kev ua tau zoo, nws yog ib qho tsim nyog yuav tsum siv cov khoom siv hluav taws xob tswj hwm. Txhawm rau txo qis kev siv hluav taws xob thiab txhim kho kev ua tau zoo, hloov hom tswj fais fab mov tau qhia.
Ib hom kev hloov hluav taws xob tswj tau feem ntau hu ua switching power supply. Nws muaj cov hauv qab no.
1, switching fais fab mov yog ncaj qha rectified thiab lim los kho cov kab hluav taws xob voltage, thiab ces tswj los ntawm switching regulator. Yog li tsis tas yuav tsum muaj lub tshuab hloov pauv.
2, switching fais fab mov feem ntau siv fais fab semiconductor li keyboards, los ntawm kev tswj lub luag hauj lwm voj voog ntawm lub hloov mus kho qhov tso zis voltage. Siv lub hwj chim transistor (GTR) ua piv txwv. Thaum lub hloov lub raj saturated conduction, lub collector thiab emitter voltage poob ntawm ob kawg yog ze rau xoom, thiab thaum lub switching tube txiav tawm, nws collector tam sim no yog xoom, yog li ntawd lub hwj chim noj yog me me thiab efficiency siab. Kev ua tau zoo tuaj yeem siab li 70% txog 95%. Thiab lub zog siv me me, lub dab dej kub kuj txo.
3, hloov zaus nyob rau hauv kaum ntawm kilohertz, siv cov lim capacitors thiab inductors uas muaj peev xwm me me. Yog li ntawd, lub zog hloov hluav taws xob muaj lub teeb yuag, me me thiab lwm yam ntxwv.
4, vim yog siv lub zog me me, qhov kub tsis tshua muaj siab hauv lub tshuab, yog li txhim kho kev ruaj ntseg thiab kev ntseeg siab ntawm lub tshuab.
Fais fab mov muaj ib tug sub-switching fais fab mov thiab tswj fais fab mov, ob hom fais fab mov no txawv, tab sis muaj qhov zoo sib xws.
Hloov fais fab mov yog qhov kev txhawb nqa thoob ntiaj teb tsis ntev los no ntawm kev tswj hwm lub zog, nrog rau kev ua haujlwm siab, kev siv hluav taws xob ntau, cov khoom siv hluav taws xob ruaj khov thiab lwm yam ntxwv, tam sim no siv ntau dua.
Piv txwv li, tam sim no lub khoos phis tawj ATX fais fab mov, lub laptop fais fab adapter, lub tshuab luam ntawv fais fab mov, lub xov tooj txawb thiab lwm yam. Regulated fais fab mov yog nyob rau hauv lub load fais fab hloov, cov zis voltage tseem tuav ib tug ruaj voltage tus nqi. Switching fais fab mov kuj yog ib tug tswj fais fab mov, tab sis cov tswj fais fab mov tsis tau ncaj qha hu ua switching fais fab mov.
Regulated fais fab mov yog siv cov hluav taws xob hluav taws xob hluav taws xob tso tawm hluav taws xob kom ua tiav lub hom phiaj ntawm kev ruaj khov ntawm lub zog hluav taws xob, muaj cov khoom siv hluav taws xob sib txuas, sib txuas-hom tswj hluav taws xob, hloov hluav taws xob tswj hluav taws xob. Ordinary series tswj fais fab mov yog ntsia lub hwj chim transformer, muaj qhov zoo ntawm qhov ruaj khov tso zis voltage, me ripple, tab sis qhov voltage ntau yog me me, tsis tshua muaj efficiency. Shunt tswj cov khoom siv hluav taws xob tso zis hluav taws xob tshwj xeeb yog qhov ruaj khov, tab sis lub peev xwm thauj khoom tsis zoo, tsuas yog nyob rau hauv cov cuab yeej siv sab hauv.
Hloov lub hwj chim regulator raj ua hauj lwm nyob rau hauv lub saturation thiab txiav-tawm lub xeev, ua rau me me tshav kub, high efficiency (ntau tshaj 75%) thiab tshem tawm cov loj ntim ntawm lub transformer. Tab sis hloov DC regulator tso zis DC yuav superimposed nyob rau sab saum toj ntawm lub loj ripple (50mv), nyob rau hauv cov zis sab thiab txuas nrog lub regulator diode yuav tsum tau txhim kho, ntxiv rau lub switching raj ua hauj lwm yog tsim ib tug loj spike mem tes cuam tshuam, tab sis kuj yuav tsum tau txuas nrog cov hlaws sib nqus hauv Circuit Court kom txhim kho. Piv txwv li, DC tswj fais fab mov tsis muaj qhov tsis xws luag saum toj no, nws cov ripple tuaj yeem ua tau me me (15mv lossis tsawg dua). Rau lub hwj chim efficiency thiab installation ntim yuav tsum tau ntawm qhov chaw nrog switching DC tswj fais fab mov yog qhov zoo tshaj plaws, rau electromagnetic cuam tshuam thiab lub hwj chim purity yuav tsum tau ntawm qhov chaw (xws li capacitive to detection) ntau linear DC tswj fais fab mov. Tsis tas li ntawd, thaum lub voj voog yuav tsum tau muab cais tawm thaum feem ntau ntawm DC-DC los ua ib feem ntawm cov khoom siv hluav taws xob (DC-DC los ntawm nws txoj cai ua haujlwm yog hloov DC tswj fais fab mov). Cov khoom siv hluav taws xob ntau zaus siv los hloov cov khoom siv hluav taws xob DC tuaj yeem ua teeb meem rau cua.
Hloov cov khoom siv hluav taws xob yog qhov hnyav thiab me me. Switching fais fab mov yog los ntawm lub switching tube qhib thiab kaw tus naj npawb ntawm lub sij hawm los yog lub sij hawm, los tswj lub tso zis hwj chim, lub efficiency yog siab tshaj txoj kab Qhov efficiency ntawm switching fais fab mov yog siab tshaj linear regulated fais fab mov, lub tshav kub tiam yog kuj. me me, tab sis cov lus teb dynamic tsis zoo, haum rau qhov chaw ruaj khov dua. Hloov fais fab mov lim capacitor vim qhov ua haujlwm zaus Lub lim capacitor ntawm lub zog hloov hluav taws xob muaj ntau zaus, yog li nws muaj kev cuam tshuam zoo rau hauv daim phiaj fais fab.
DC linear tswj fais fab mov yog hnyav, lub lim capacitor loj, tag nrho ntim yog loj. DC linear tswj fais fab mov yog kho lub raj hluav taws xob faib hluav taws xob kom cov zis hluav taws xob qis dua, yog li lub nra ntawm kev kho lub raj yog hnyav heev. Kev hloov lub raj lub nra hnyav heev, cov cua sov loj thiab tsis muaj kev ua haujlwm tsawg. Tab sis cov lus teb dynamic yog zoo heev, haum rau nquag hloov pauv, xws li suab amplifiers.
