12V, 2A Cov Khoom Siv Hluav Taws Xob Tsis Txaus Siab: 6 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

POWER SUPPLY CONTEST ENTRY

Thov pov npav rau kuv yog tias koj pom tias Cov Lus Qhia no muaj txiaj ntsig

Lub Hwj Huam Fais Fab Tsis Txaus Siab yog dab tsi?

Extract los ntawm Wikipedia

"Lub hwj huam hluav taws xob tsis cuam tshuam, kuj tseem siv lub hwj chim tsis cuam tshuam, UPS lossis lub roj teeb rov qab, yog cov khoom siv hluav taws xob uas muab hluav taws xob xwm txheej ceev rau lub nra thaum lub zog nkag los lossis lub zog hluav taws xob tsis ua haujlwm. nyob rau hauv uas nws yuav muab kev tiv thaiv ze-tam sim los ntawm kev cuam tshuam lub zog cuam tshuam, los ntawm kev muab lub zog khaws cia hauv roj teeb."

Nco ntsoov tias UPS tsuas yog siv lub sijhawm luv luv, thiab lub zog muaj peev xwm yuav nyob ntawm qhov thauj khoom txuas nrog UPS.

Vim li cas 12V UPS?

Feem ntau cov cuab yeej siv hluav taws xob niaj hnub no nyob hauv thiab ib puag ncig peb lub tsev vam khom lub zog siv hluav taws xob nkaus xwb. Thaum lub hwj chim tawm mus, yog li ua tag nrho peb cov cuab yeej siv hluav taws xob niaj hnub no. Muaj qee qhov xwm txheej uas qhov no tsis xav tau, rau npe tsuas yog ob peb leeg:

• Tswb systems
• Nkag mus rau kev tswj hwm
• Kev sib txuas network
• Cov xov tooj
• Kev nyab xeeb / teeb thaum muaj xwm ceev

Txhua lub tshuab no feem ntau ua haujlwm ntawm 12V, thiab tuaj yeem txuas tau yooj yim nrog 12V UPS.

Cov khoom siv ntawm UPS

UPS muaj 3 ntu:

1. Transformer
2. Kev tswj fais fab
3. Roj teeb charger
4. Roj teeb rov qab

Kuv yuav hla txhua kauj ruam, piav qhia yuav tsim kom ntseeg tau 12V UPS siv yam tsis muaj cov khoom tshwj xeeb.

Kauj ruam 1: Transformer

12V UPS siv lub thawv ntim khoom, tus qauv hloov pauv, uas muaj nyob ntawm txhua tus thawj coj khoom siv kev ruaj ntseg. Cov hloov pauv yuav tsum nyob nruab nrab ntawm 16 txog 17 V AC, thiab ntsuas txog 3 amps. Kuv ib txwm nyiam tshaj qhov tsim, yog li kuv yuav tsim 2A UPS no kom nws tau ntsuas rau qhov siab tshaj ntawm 3A.

Qee tus neeg xa khoom muaj cov hloov pauv twb tau teeb tsa rau hauv lub thawv ntawv, nrog ntxiv kev tiv thaiv tam sim no thiab tiv thaiv kev tiv thaiv.

Kauj Ruam 2: Txoj Cai Tswj Fais Fab

UPS yuav tsum muaj peev xwm txuas ntxiv muab cov ntsuas tam sim no ntawm qhov ntsuas hluav taws xob tso tawm, tsis tas yuav tso lub roj teeb rov qab rau kev pab. Yog li thawj kauj ruam yuav tsim lub zog 12V.

Qhov pib zoo yuav yog siv LM317 tus tswj hluav taws xob. Ua ntej peb saib qhov ntsuas tam sim no ntawm lub cuab yeej, cia pib nrog kev tswj hwm tso zis hluav taws xob. Txawm hais tias peb txhua tus siv los hais txog 12V system, nws yog qhov tseeb ib txwm yog 13.8V system. Qhov hluav taws xob no yog qhov them tag nrho qhov hluav taws xob ntawm tus qauv SLA roj teeb. Yog li rau txhua qhov kev suav, Kuv yuav siv 13.8V.

Txhawm rau xam cov khoom muaj txiaj ntsig, xa mus rau LM317 cov ntawv teev npe. Nws hais tias:

Vout = 1.25 (1 + R2 / R1) + Iadj x R2

thiab tias Iadj raug txwv rau 50uA.

Txhawm rau pib tawm, Kuv xaiv R1 tus nqi ua 1Kohm, yog li

Vout = 1.25 (1 + R2 / R1) + Iadj x R2

13.8 = 1.25 (1 + R2/1K) + 50uA x R2

13.8 = 1.25 + 1.25/10E3 x R2) + 50E-6 x R2

12.55 = 0.00125 R2 + 0.00005 R2

12.55 = 0.0013 TZS

R2 = 9.653Kohm

Tab sis tus nqi ntawm 9.653Kohm tsis yog tus qauv ntsuas tus nqi, yog li peb yuav tsum siv ntau tus tiv thaiv kom ze rau tus nqi no. Qhov kev daws teeb meem zoo tshaj plaws yuav yog muab ob lub resistors nyob ua ke. Ib qho twg ob tus neeg tawm tsam sib luag, yuav ib txwm muaj kev tiv thaiv qis dua li tus nqi qis tshaj. Yog li ua tus tiv thaiv R2a 10Kohm.

1/R2 = 1/R2a + 1/R2b

1/9.653K = 1/10K + 1/R2b

1/9.653K - 1/10K = 1/R2b

R2b = 278Kohm

R2b li 270K

R2 = 9.643Kohm, kaw txaus rau yam peb xav tau.

1000uf capacitor tsis tseem ceeb, tab sis qhov no yog tus nqi zoo. 0.1uf capacitor txo cov zis hluav taws xob oscillations

Tam sim no peb muaj 13.8V fais fab mov, ntsuas ntawm 1.5 amp raws li cov ntawv teev tseg.

Kauj Ruam 3: Lub Roj Teeb Charger

Txhawm rau siv peb cov khoom siv hluav taws xob ua lub roj teeb them, peb yuav tsum txwv qhov them tam sim no rau lub roj teeb. Lub zog siv hluav taws xob tsuas tuaj yeem muab 1.5 amps siab tshaj, yog li cov kauj ruam tom ntej yuav yog saib ntawm Circuit nrog lub roj teeb txuas nrog rau qhov tso tawm. Raws li lub roj teeb hluav taws xob nce (them), kev them nqi tam sim no yuav txo qis. Nrog lub roj teeb tau them tag nrho ntawm 13.8V, kev them nqi tam sim no yuav poob mus rau xoom.

Tus tiv thaiv ntawm cov zis yuav raug siv los txwv qhov tam sim no rau qhov ntsuas ntawm LM317. Peb paub qhov hluav taws xob tso tawm ntawm LM317 tau tsau ntawm 13.8V. Qhov tsis muaj roj teeb SLA roj teeb nyob ib puag ncig 12.0V. Xam R tam sim no yooj yim.

R = V / II

R = (13.8V - 12V) / 1.5A

R = 1.2 hli

Tam sim no, lub zog tawm hauv lub resistor yog

P = kuv^2 R

P = 1.5^2 x 1.2

P = 2.7W

Kauj Ruam 4: Doubling Tam Sim No rau 3A Siab Tshaj

Hloov chaw ntawm kev siv tus tswj hwm kim dua uas tau ntsuas rau 3A, Kuv tau xaiv los tseem siv tus qauv LM317. Txhawm rau nce qhov ntsuas tam sim no ntawm UPS, Kuv yooj yim ntxiv ob lub voj voog ua ke, yog li ob npaug ntawm qhov ntsuas tam sim no.

Tab sis muaj teeb meem thaum txuas ob lub hwj huam khoom siv ua ke. Txawm hais tias lawv qhov hluav taws xob tso tawm tau suav kom zoo ib yam, kev hloov pauv ntawm cov khoom siv, nrog rau PC Board teeb tsa yuav ua rau ib lub zog siv ib txwm siv feem ntau ntawm tam sim no. Txhawm rau tshem tawm qhov no, cov txiaj ntsig ua ke tau raug coj los tom qab qhov txwv qhov txwv tam sim no, thiab tsis yog los ntawm tus tswj hwm nws tus kheej. Qhov no ua kom ntseeg tau tias qhov sib txawv ntawm qhov sib txawv ntawm ob tus tswj hwm tau nqus los ntawm cov khoom tawm tsam.

Kauj Ruam 5: Qhov kawg Circuit

Kuv tsis muaj peev xwm muab 1R2, 3W resistors, yog li kuv txiav txim siab siv ob peb resistors los ua 1R2 resistor. Kuv suav qhov sib txawv/sib npaug resistor qhov tseem ceeb, thiab pom tias siv rau rau 1R8 resistors yields 1R2. Raws nraim qhov kuv xav tau. Tam sim no 1R2 3W resistor tau hloov nrog rau 1R8 0.5W resistors.

Lwm qhov ntxiv rau hauv Circuit Court yog lub zog ua tsis tiav. Qhov kev tso tawm no yuav yog 5V thaum lub hwj chim tseem ceeb tam sim no, thiab 0V thaum lub hwj chim tsis ua haujlwm. Qhov ntxiv no ua rau nws yooj yim dua txuas UPS rau cov kab ke uas tseem xav tau lub teeb liab teeb liab. Lub Circuit Court tseem suav nrog cov xwm txheej ntawm on-board LED.

Thaum kawg, kev tiv thaiv fuse tau ntxiv rau 12V qhov hluav taws xob ntawm UPS.

Kauj Ruam 6: PC Board

Tsis hais ntau ntawm no.

Kuv tsim lub PC Board yooj yim siv dawb version ntawm Eagle. Lub Rooj Tswjhwm Saib Xyuas PC tau tsim los xws li cov uas tsis muaj kev tiv thaiv nrawm txuas cov hlua tuaj yeem muab txuas rau PC Board. Qhov no tso cai rau ua tiav UPS lub rooj tsav xwm kom teeb tsa saum lub roj teeb.

Nco ntsoov ntxiv qhov ntsuas cua sov kom haum rau ob LM317 tus tswj hwm.