Cov txheej txheem:
- Kauj Ruam 1: YUAV TSUM MUAJ NTAUB NTAWV
- Kauj Ruam 2: CIRCUIT ua haujlwm
- Kauj Ruam 3: DESIGN
- Kauj ruam 4: Xa mus rau tus tsim khoom
Video: Crowbar Circuit: 4 Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:27
Nyob zoo cov neeg, Lub voj voos thaiv kab yog ib txoj hauv kev tiv thaiv kev tiv thaiv hluav taws xob tiv thaiv qhov hluav taws xob siab (overvoltage) thaum muaj hluav taws xob ua haujlwm tsis zoo lossis lub zog nce. Qhov no yog qhov muaj txiaj ntsig tshwj xeeb hauv cov cuab yeej siv TTL cov khoom siv vim tias cov no nkag siab heev rau qhov overvoltage. Txawm li cas los xij, muaj ntau lwm yam khoom siv uas tuaj yeem raug puas los ntawm overvoltage.
Yog tias qhov hluav taws xob nkag mus rau hauv Circuit Court nce mus txog qhov pib, Zener diode tawg thiab ua rau ib qho TRIAC lossis SCR kom luv zog thiab hauv av … zoo li yog koj cuam ib pawg neeg hla lub dav hlau. Qhov no yuam ntau qhov tam sim no los ntawm lub cuab yeej tab sis tam sim ntawd txo qhov hluav taws xob. Ib lub fuse inline yuav hluav taws xob txuas lub thauj khoom los ntawm cov khoom siv. Hauv qhov xwm txheej ntawm SCR, thaum Zener diode tawg, qhov hluav taws xob tshwm ntawm lub qhov rooj davhlau ya nyob twg ntawm SCR. Yog tias qhov no siab dua SCR lub qhov rooj qhib qhov hluav taws xob, lub cuab yeej tig rau.
Kauj Ruam 1: YUAV TSUM MUAJ NTAUB NTAWV
1.3A FUSE
2. RED LED
3. LM431 IC
4. BT137S
5. RESISTOR SMD - 200, 3.5K, 2.5K, 220
Kauj Ruam 2: CIRCUIT ua haujlwm
Daim duab qhia chaw ntawm lub voj voos zauv yog yooj yim heev thiab tsim tau yooj yim thiab siv los ua kom nws muaj txiaj ntsig thiab daws tau sai. Daim duab qhia chaw ntawm lub dav hlau ua tiav tau qhia saum toj no.
Kev hloov kho Zener diode LM431 thiab TRIAC tsis zoo li SCR. Lub diode tawg thaum twg qhov hluav taws xob ntawm cov lus siv nkag mus txog 2.5 V. Qhov no txhais tau tias nws tuaj yeem teeb tsa kom zoo nkauj ntau qib nrog qhov faib hluav taws xob yooj yim. R1 thiab R2 tau xaiv xws li qhov txwv qhov hluav taws xob tsuas yog li 6 V.
Qhov ntawd yog vim qhov tseeb tias TRIAC thiab SCR tsis ua rau tib txoj kev. LM431's cathode tam sim no thaum tawm yog li 1 uA. Qhov no txhais tau tias muaj qhov hluav taws xob me me poob thoob R4, qhov tseem ceeb khaws MT1 thiab lub rooj vag ntawm TRIAC ntawm tib qhov hluav taws xob. Thaum lub ntsuas hluav taws xob tau mus txog thiab Zener tawg, tam sim no pib ntws los ntawm R4, ua rau muaj qhov poob loj dua nws.
Qhov no tso TRIAC rau hauv kev ua haujlwm thib plaub, txij li ob qho tib si MT2 thiab lub rooj vag nyob ntawm qhov muaj peev xwm qis dua li MT1. Qhov tseem ceeb, ib qho me me ntawm cov dej ntws los ntawm MT1 mus rau lub qhov rooj uas ua rau muaj dej ntau ntws los ntawm MT1 mus rau MT2. Yog tias qhov no ntau dua li ob peb milliamps, TRIAC "latches" (latch tam sim no) thiab nyob twj ywm ua kom txog thaum tam sim no tsawg dua qhov muaj npe hu ua tuav tam sim no.
Thaum TRIAC ua, lub 3A tsheb fuse yuav tshuab, tiv thaiv Circuit Court. Kuj tseem muaj qhov ua tau zoo, dandy LED qhia rau koj paub yog tias lub fuse tau tshuab lossis tsis yog.
Kauj Ruam 3: DESIGN
Cov hluav taws xob saum toj no tau hloov pauv mus rau hauv PCB. Kuv tau qhia koj cov txheej txheem tsim siv EAGLE CAD cov cuab yeej.
Kauj ruam 4: Xa mus rau tus tsim khoom
Kuv nyiam LIONCIRCUITS vim tias zoo thiab tsim nyog tus nqi. Koj kuj tuaj yeem sim nws. Pom zoo.
Pom zoo:
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