Yog vim li cas kawm fais fab Circuit Court tsim
Cov khoom siv hluav taws xob hluav taws xob yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob, kev tsim hluav taws xob hluav taws xob hluav taws xob muaj feem cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov khoom.
Classification ntawm fais fab mov circuits
Lub zog hluav taws xob ntawm peb cov khoom siv hluav taws xob feem ntau suav nrog cov khoom siv hluav taws xob linear thiab cov khoom siv hluav taws xob ntau zaus. Nyob rau hauv txoj kev xav, lub linear fais fab mov yog npaum li cas tam sim no tus neeg siv xav tau, cov tswv yim yuav muab ntau npaum li cas tam sim no; Hloov fais fab mov yog lub hwj chim ntau npaum li cas tus neeg siv xav tau, thiab lub zog npaum li cas yog muab rau ntawm qhov kawg input.
Schematic daim duab ntawm linear fais fab mov Circuit Court
Cov khoom siv hluav taws xob tawm ua haujlwm hauv ib lub xeev, xws li peb cov khoom siv hluav taws xob feem ntau siv hluav taws xob LM7805, LM317, SPX1117 thiab lwm yam. Daim duab 1 hauv qab no yog daim duab schematic ntawm LM7805 tswj fais fab mov Circuit Court.
Daim duab 1 Schematic daim duab ntawm linear fais fab mov
Nws tuaj yeem pom los ntawm daim duab uas cov khoom siv hluav taws xob linear yog tsim los ntawm cov khoom siv ua haujlwm xws li rectification, filtering, voltage regulation thiab zog cia. Nyob rau tib lub sijhawm, cov khoom siv hluav taws xob dav dav yog cov khoom siv hluav taws xob hluav taws xob tswj hluav taws xob, cov zis tam sim no sib npaug rau cov tswv yim tam sim no, I1 = I2 + I3, I3 yog qhov kawg siv, tam sim no me me, yog li I1≈I3 . Vim li cas peb thiaj xav tham txog qhov tam sim no, vim hais tias PCB tsim, qhov dav ntawm txhua kab yog tsis randomly teem, yuav tsum tau txiav txim raws li qhov loj ntawm tam sim no ntawm cov nodes nyob rau hauv lub schematic. Tam sim no qhov loj me thiab cov dej ntws tam sim no yuav tsum tau meej kom ua rau lub rooj tsavxwm zoo.
Linear fais fab mov PCB daim duab
Thaum tsim cov PCB, qhov kev teeb tsa ntawm cov khoom yuav tsum compact, tag nrho cov kev sib txuas yuav tsum luv li sai tau, thiab cov khoom thiab cov kab yuav tsum tau nteg tawm raws li kev sib raug zoo ntawm cov schematic Cheebtsam. Daim duab fais fab mov no yog thawj qhov kev kho dua tshiab, thiab tom qab ntawd lim dej, lim dej yog qhov kev tswj hwm hluav taws xob, kev tswj hluav taws xob yog lub zog cia capacitor, tom qab ntws los ntawm lub capacitor mus rau cov hluav taws xob hauv qab no.
Daim duab 2 yog daim duab PCB ntawm daim duab schematic saum toj no, thiab ob daim duab zoo sib xws. Daim duab sab laug thiab sab xis yog qhov sib txawv me ntsis, cov khoom siv hluav taws xob nyob rau hauv daim duab sab laug yog ncaj qha mus rau cov lus taw qhia ntawm lub zog hluav taws xob regulator nti tom qab kev kho, thiab tom qab ntawd cov hluav taws xob tswj hluav taws xob capacitor, qhov kev lim dej ntawm lub capacitor yog qhov phem dua. , thiab cov zis kuj muaj teeb meem. Daim duab ntawm sab xis yog qhov zoo. Peb yuav tsum tsis tsuas yog xav txog qhov txaus ntshai ntawm qhov zoo ntawm cov khoom siv hluav taws xob, tab sis kuj yuav tsum xav txog qhov teeb meem backflow, feem ntau, txoj kab hluav taws xob zoo thiab cov kab rov qab hauv av yuav tsum nyob ze rau ib leeg li sai tau.
Daim duab 2 PCB daim duab ntawm linear fais fab mov
Thaum tsim cov linear fais fab mov PCB, peb yuav tsum tau them sai sai rau lub tshav kub dissipation teeb meem ntawm lub hwj chim regulator nti ntawm lub linear fais fab mov, yuav ua li cas lub tshav kub los, yog hais tias lub voltage regulator nti pem hauv ntej kawg yog 10V, cov zis kawg yog 5V, thiab cov zis tam sim no yog 500mA, tom qab ntawd muaj 5V voltage poob ntawm cov regulator nti, thiab cov cua sov tsim tawm yog 2.5W; Yog hais tias lub input voltage yog 15V, qhov voltage poob yog 10V, thiab lub tshav kub generated yog 5W, yog li ntawd, peb yuav tsum tau teem ib sab txaus tshav kub dissipation qhov chaw los yog tsim nyog lub dab ntxuav tes raws li lub tshav kub dissipation hwj chim. Linear fais fab mov feem ntau yog siv nyob rau hauv lub sij hawm uas lub siab sib txawv me me thiab tam sim no kuj me me, txwv tsis pub, thov siv lub switching fais fab mov Circuit Court.
High zaus switching fais fab mov Circuit Court schematic piv txwv
Switching fais fab mov yog siv lub Circuit Court los tswj lub switching tube rau high-speed on-off thiab txiav-tawm, tsim PWM waveform, los ntawm inductor thiab lub nruam tam sim no diode, siv electromagnetic hloov dua siab tshiab ntawm txoj kev tswj voltage. Hloov cov khoom siv hluav taws xob, kev ua haujlwm siab, cua sov tsawg, peb feem ntau siv lub voj voog: LM2575, MC34063, SP6659 thiab lwm yam. Nyob rau hauv txoj kev xav, lub zog hloov hluav taws xob sib npaug ntawm ob qho kawg ntawm lub voj voog, qhov voltage yog inversely proportional, thiab tam sim no yog inversely proportional.
Daim duab 3 Schematic daim duab ntawm LM2575 switching power supply circuit
PCB daim duab ntawm switching fais fab mov
Thaum tsim lub PCB ntawm lub zog hloov hluav taws xob, nws yog ib qho tsim nyog yuav tsum tau them sai sai rau: lub ntsiab lus nkag ntawm cov lus tawm tswv yim thiab cov diode tam sim no txuas ntxiv yog rau leej twg uas tau muab tam sim no txuas ntxiv. Raws li tau pom los ntawm daim duab 3, thaum U1 hloov mus, tam sim no I2 nkag mus rau inductor L1. Tus yam ntxwv ntawm tus inductor yog tias thaum tam sim no ntws los ntawm inductor, nws tsis tuaj yeem tsim tawm tam sim ntawd, thiab tsis tuaj yeem ploj tam sim ntawd. Kev hloov pauv tam sim no hauv inductor muaj lub sijhawm ua haujlwm. Nyob rau hauv qhov kev txiav txim ntawm pulsed tam sim no I2 ntws los ntawm inductance, qee lub zog hluav taws xob tau hloov mus rau hauv lub zog sib nqus, thiab tam sim no maj mam nce, ntawm qee lub sijhawm, kev tswj xyuas Circuit Court U1 tua I2, vim yog cov yam ntxwv ntawm inductance, tam sim no tsis tuaj yeem ploj mus tam sim no, lub sijhawm no lub diode ua haujlwm, nws yuav siv sijhawm tam sim no I2, yog li nws raug hu ua qhov txuas tam sim no diode, nws tuaj yeem pom tau tias cov diode txuas ntxiv yog siv rau inductance. Lub nruam tam sim no I3 pib los ntawm qhov tsis zoo kawg ntawm C3 thiab ntws mus rau qhov zoo kawg ntawm C3 txog D1 thiab L1, uas yog sib npaug rau lub twj tso kua mis, siv lub zog ntawm inductor kom nce qhov voltage ntawm lub capacitor C3. Kuj tseem muaj qhov teeb meem ntawm qhov taw tes tawm tswv yim ntawm cov lus tawm tswv yim ntawm qhov ntsuas hluav taws xob, uas yuav tsum tau muab rov qab rau qhov chaw tom qab lim dej, txwv tsis pub cov zis voltage ripple yuav loj dua. Ob lub ntsiab lus no feem ntau tsis quav ntsej los ntawm ntau ntawm peb cov neeg tsim qauv PCB, xav tias tib lub network tsis zoo ib yam nyob ntawd, qhov tseeb, qhov chaw tsis zoo ib yam, thiab qhov kev ua tau zoo yog qhov zoo. Daim duab 4 yog daim duab PCB ntawm LM2575 switching power supply. Cia peb saib seb qhov twg yog qhov tsis ncaj ncees lawm daim duab.
Daim duab 4 PCB daim duab ntawm LM2575 hloov fais fab mov
Vim li cas peb thiaj xav tham txog lub hauv paus ntsiab lus ntawm schematic kom meej, vim hais tias cov schematic muaj ntau cov ntaub ntawv PCB, xws li cov ntsiab lus nkag ntawm cov khoom siv tus pin, qhov loj ntawm cov node network, thiab lwm yam, saib cov schematic, PCB tsim. tsis yog teeb meem. Lub LM7805 thiab LM2575 circuits sawv cev rau cov qauv txheej txheem ntawm cov khoom siv hluav taws xob tawm thiab hloov hluav taws xob, feem. Thaum ua PCBS, qhov kev teeb tsa thiab xaim ntawm ob daim duab PCB no ncaj qha rau ntawm kab, tab sis cov khoom sib txawv thiab lub rooj tsav xwm hauv Circuit Court yog txawv, uas yog kho raws li qhov tseeb.
Tag nrho cov kev hloov pauv yog inseparable, yog li lub hauv paus ntsiab lus ntawm lub hwj chim Circuit Court thiab txoj kev ntawm lub rooj tsavxwm yog li ntawd, thiab txhua yam khoom siv hluav taws xob yog inseparable ntawm lub hwj chim mov thiab nws Circuit Court, yog li ntawd, kawm ob circuits, lwm yam kuj to taub.
Lub sij hawm xa tuaj: Plaub Hlis-08-2023
