Cov txheej txheem:
- Kauj Ruam 1: Sib sau ua ke
- Kauj Ruam 2: Nqa Txhua Qhov Ua Ke
- Kauj Ruam 3: Tso Thermistor Tswv Yim
- Kauj Ruam 4: Nws Yuav Tsum Saib Ib Yam Li No …
Video: Tawm Hloov Hloov Tus Nqi Voltage Regulator 1-20 V: 4 Cov Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26
Tus tswj hwm txoj kab hluav taws xob tswj hwm qhov hluav taws xob tas li ntawm cov zis yog tias qhov hluav taws xob nkag siab ntau dua qhov tso tawm thaum nthuav tawm qhov sib txawv ntawm qhov hluav taws xob lub sijhawm tam sim no watts ntawm lub zog raws li cua sov.
Koj tuaj yeem ua tus tswj hwm qhov hluav taws xob tsis zoo siv Zener diode, 78xx series cov tswj hwm thiab qee yam khoom siv ntxiv, tab sis qhov ntawd yuav tsis tuaj yeem muab cov dej ntws zoo li 2-3A.
Zuag qhia tag nrho kev ua haujlwm ntawm txoj cai tswjfwm yog qhov tsawg dua piv rau kev hloov cov khoom siv, phaw, txhawb kev hloov pauv txij li nws tau siv lub zog tsis siv li cua sov thiab yuav tsum tau tshem tawm tas li lwm qhov ntse cov tswj hwm seizes.
Qhov tsim khoom siv hluav taws xob no muaj txiaj ntsig zoo yog tias koj tsis muaj teeb meem kev siv hluav taws xob lossis yog tias koj tsis ua lub zog hluav taws xob nqa tau hluav taws xob.
Tag nrho cov Circuit Court yog ua los ntawm peb ntu, 1. Tus tswj hwm qhov sib txawv tseem ceeb (1.9 - 20 V)
2. tus tswj hwm thib ob
3. Sib piv, kiv cua tsav tsheb (MOSFET)
LM317 yog tus tswj hluav taws xob zoo rau cov pib thaum siv kom raug. Nws tsuas yog xav tau ib qho kev faib hluav taws xob muab rau nws hloov tus pin kom tau txais qhov sib txawv ntawm qhov hluav taws xob ntawm qhov tso tawm. Cov zis hluav taws xob nyob ntawm qhov hluav taws xob ntawm kho tus pin, feem ntau khaws cia ntawm 1.25 V.
cov zis thiab kho tus pin tus nqi cuam tshuam nrog, Vout = 1.25 (R2/R1+1)
Tam sim no ntawm kev thauj khoom tseem yuav luag zoo ib yam li i/p tam sim no ntawm txhua qhov teeb tsa. Cia xav tias Yog tias thauj khoom ntawm O/p thim tam sim no ntawm 2A ntawm 10V, qhov seem Voltage ntawm 10V nrog qhov tam sim no ntawm 1A hloov pauv hauv daim ntawv ntawm cua sov 10W !!!!!!
Yog li nws lub tswv yim zoo los txuas lub rhaub dej kub rau nws ……… vim li cas ho tsis muaj FAN !!!! ??????
Kuv muaj lub kiv cua me me tso nyob ib puag ncig, tab sis qhov teeb meem nws tuaj yeem siv sijhawm tsuas yog 12V rau qhov siab tshaj rpm tab sis kuv/p qhov hluav taws xob yog 20V, yog li kuv yuav tsum ua tus tswj hwm cais (siv LM317 nws tus kheej) rau tus kiv cua, tab sis yog tias kuv khaws lub kiv cua txhua lub sijhawm uas tsuas yog siv lub zog qis, yog li ntxiv tus sib piv los qhib lub kiv cua tsuas yog thaum qhov ntsuas kub ntawm lub tshuab tswj cua sov tseem ceeb ncav cuag tus nqi ua ntej.
Cia nws pib !!!
Kauj Ruam 1: Sib sau ua ke
Peb xav tau, 1. LM317 (2)
2. Cov cua sov (2)
3. qee tus tiv thaiv (txheeb xyuas qhov ntsuas rau qhov muaj txiaj ntsig)
4. electrolytic capacitors (kos schmatics rau qhov muaj nuj nqis)
5. perf Board (project PCB)
6. MOSFET IRF540n
7. KUV
8. qee qhov txuas
9. Potentiometers (10k)
10. Thermistor
Kauj Ruam 2: Nqa Txhua Qhov Ua Ke
Xaiv qhov loj ntawm PCB pawg thawj coj uas koj nyiam nrog.
Kuv kinda ua rau nws compact 6cm los ntawm 6cm, yog tias koj ua tau zoo hauv qhov muag koj tuaj yeem mus nrog txawm tias me me;)
khaws Vin txuas ntawm sab laug thiab Vout ntawm sab xis, sib piv IC hauv nruab nrab thiab cov tswj hwm nyob rau sab saum toj nrog kiv cua nyob rau sab saum toj feem ntau ua rau nws yooj yim los tuav thiab siv.
Tsuas yog ua raws cov lej, khaws kev tshuaj xyuas txuas ntxiv tam sim no thiab tom qab ntawd rau luv luv thiab txuas kom raug.
Kauj Ruam 3: Tso Thermistor Tswv Yim
Muab lub thermistor tiv nrog lub dab dej sov, kuv khaws nws hauv qhov rooj ntawm qhov cua sov.
txij li cov thermistor nyob hauv kab nrog lwm 10K resistor nws qhov faib hluav taws xob ntawm qhov tseeb 10 txog 10V, thaum qhov kub nce qhov tsis kam ntawm cov thermistor txo qis tab sis qhov hluav taws xob ua kom nce mus txog 20V.
Qhov hluav taws xob no tau muab rau non_inverting davhlau ya nyob twg ntawm opamp 741 thiab inverting davhlau ya nyob twg yog khaws cia ntawm 11V, yog li thaum lub thermistor voltage mus dhau 11V opamp outputs HIGH ntawm tus pin6.
Kauj Ruam 4: Nws Yuav Tsum Saib Ib Yam Li No …
Cia peb sim nws !!!
muab 20V cov tswv yim los ntawm kuv tus hloov pauv ntawm FOOOLLBRIDGE RECIFIER !! thiab hloov kho O/p mus rau ib puag ncig 15V, kuv txuas 5W 22ohm resistor ntawm O/p uas tau teeb tsa ib puag ncig 2.5A.
Cov cua sov pib cua sov thiab mus ze rau 56C, lub ntsuas hluav taws xob hluav taws xob tau nce siab tshaj 11V yog li tus neeg sib piv tau tshawb pom qhov ntawd thiab tig Mosfet rau hauv thaj tsam saturation tig lub FAN kom txias lub dab dej sov.
Annnd nws yog !!! koj tsuas yog tsim qhov ntsuas hluav taws xob sib txawv uas koj tuaj yeem siv nws ua LAB lub rooj zaum fais fab mov, kom them roj teeb, rau kev xa hluav taws xob rau cov qauv hluav taws xob thiab cov npe txuas ntxiv mus …
yog tias koj muaj cov lus nug ntsig txog qhov project xav nug dawb !!!
seej!
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