Lub sijhawm raug tsim ua lub hauv paus zais ntawm kev siv hluav taws xob niaj hnub thiab cov khoom siv hluav taws xob. Txawm hais tias nws yog staggering lub startup ntawm hnyav industrial motors los yog ua kom lub projector kiv cua khiav tom qab kaw, tswj cov xwm txheej dhau sij hawm yog ib qho tseem ceeb engineering xav tau.
Lub sij hawm relay, tseem hu ua timer relay, yog cov khoom tseem ceeb uas ua rau qhov kev tswj hwm no. Nws yog qhov hloov pauv ntse uas ntxiv qhov kev txiav txim siab, kwv yees ncua sijhawm ntawm kev tswj lub teeb liab thiab kev ua haujlwm tso tawm.
Kab lus no muab ib qho kev ntsuam xyuas tag nrho ntawm lub sij hawm relay. Peb mam li pib nrog nws cov hauv paus ntsiab lus, tshuaj xyuas cov txheej txheem hauv ncua sijhawm, saib cov ncauj lus kom ntxaws Circuit Court, thiab tshawb xyuas cov ntawv thov circuits. Peb mam li npog txhua yam los ntawm lub tswv yim tseem ceeb ntawm lub hwj chim - ncua sij hawm rau cov ntsiab lus ntawm lub hwj chim - tawm ncua sij hawm.
Nkag siab txog Cov Ntsiab Lus
Yuav kom nkag siab txog lub sij hawm relay, peb yuav tsum xub tuav tus txheej txheem electromechanical relay. Ib qho yooj yim relay siv ib tug me me tam sim no los ntawm ib tug coil los tsim ib tug magnetic teb. Daim teb no lub cev txav mus rau ib qho armature los hloov qhov sib cais, feem ntau siab dua - zog, Circuit Court. Nws ua haujlwm tam sim ntawd.
Lub sij hawm relay txhim kho lub tswv yim no los ntawm kev ntxiv ib lub sij hawm tshwj xeeb. Qhov Circuit Court no cuam tshuam cov teeb liab tswj thiab ncua qhov kawg nkaus ntawm kev hloov cov ntaub ntawv tawm. Qhov no ntxiv cov ntsiab lus tseem ceeb ntawm lub sijhawm rau lub relay txoj haujlwm.
Ntxiv lub Element of Time
Lub sij hawm Circuit Court yog "lub hlwb" ntawm lub sij hawm relay. Nws ntsuas lub sijhawm tshwj xeeb tom qab tau txais lub cim qhia. Tsuas yog tom qab lub sij hawm preset dhau los no lub sij hawm Circuit Court xa ib lub teeb liab mus rau tus neeg tsav tsheb relay. Tus tsav tsheb ces energizes los yog de-energizes relay kauj.
Qhov kev sib cais ntawm qhov tshwm sim tshwm sim los ntawm qhov tso zis tawm txiav txim siab lub sijhawm relay. Nws tso cai rau kev sib txuas, kev tiv thaiv, thiab kev tswj cov txheej txheem uas yuav ua tsis tau nrog tus qauv relays ib leeg.
Cov Qauv Ua Haujlwm Tseem Ceeb
Lub sijhawm relays ua haujlwm hauv ob hom tseem ceeb. Cov hom no yog txhais los ntawm thaum lub sij hawm lub sij hawm pib thiab thaum lub sij hawm tso zis hu qhib.
Lub hwj chim- ntawm ncua sij hawm relay, feem ntau hu ua ib qho ntawm - ncua sij hawm, pib nws lub sij hawm lub sij hawm lub sij hawm nws tswj input lossis coil tau txais lub zog. Cov ntaub ntawv tso tawm nyob rau hauv lawv lub xeev thawj zaug thaum lub sijhawm. Lawv tsuas yog hloov lub xeev tom qab qhov kev ncua ncua dhau lawm.
Lub zog-tawm ncua ncua sijhawm, lossis tawm- ncua sijhawm ncua sijhawm, ua haujlwm txawv. Thaum nws cov tswv yim tswj tau txais lub zog, cov ntaub ntawv tso zis hloov pauv lub xeev tam sim ntawd. Lub sij hawm lub voj voog pib tsuas yog thaum tus tswj cov tswv yim poob lub zog. Cov neeg sib cuag ces nyob hauv lawv lub xeev hloov mus rau lub sijhawm ncua ua ntej rov qab mus rau lawv txoj haujlwm qub.
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Feature |
Fais fab-Nyob rau ncua (Nyob-Ntev) |
Fais fab-Off ncua (Tawm-Ntev) |
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Ua rau |
Lub zog siv rau kev tswj input / coil. |
Fais fab tshem tawm ntawm kev tswj input/coil. |
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Hu rau Action |
Hu rau hloovtom qablub sijhawm ncua. |
Cov neeg hu rov qab mus rau lawv lub xeev qubtom qablub sijhawm ncua. |
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Daim duab Timing |
Input mus siab, timer pib, tso zis mus siab tom qab ncua. |
Input mus siab, tso zis mus siab instantly. Input mus qis, timer pib, tso zis mus qis tom qab ncua. |
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Common Use Case |
Staggered lub cev muaj zog pib-txog kom txwv tsis pub muaj zog tam sim no. |
Cia tus kiv cua khiav ib ntus tom qab lub cav kaw kom dissipate cua sov. |
Sib sib zog nqus dhia mus rau hauv kev ncua sijhawm
Cov txheej txheem siv los tsim lub sijhawm ncua sijhawm tiag tiag txhais lub sijhawm relay qhov kev ua tau zoo, raug, thiab tsim nyog rau daim ntawv thov. Cov txheej txheem no poob rau hauv ob pawg loj: analog thiab digital.
Kev nkag siab txog yuav ua li cas cov kab hluav taws xob sab hauv no ua haujlwm muab cov kev paub uas xav tau los xaiv cov cuab yeej raug thiab daws teeb meem lub sij hawm kom zoo. Qhov no tsim lub hauv paus ntawm lub sij hawm relay ua hauj lwm hauv paus ntsiab lus tsom xam.
Analog Delay Txoj Cai
Cov txheej txheem classic rau kev tsim lub sijhawm ncua sijhawm siv analog Resistor-Capacitor (RC) network. Lub hauv paus ntsiab lus no yog nyob ntawm lub sijhawm kwv yees nws yuav siv rau lub capacitor kom them lossis tso tawm los ntawm lub resistor.
Thaum siv hluav taws xob, lub capacitor pib them. Qhov hluav taws xob hla nws tsis nce tam sim ntawd tab sis ua raws qhov kev nthuav dav. Tus nqi ntawm cov nqi no nyob ntawm lub sij hawm tsis tu ncua ntawm Circuit Court.
Lub sij hawm tas mus li, sawv cev los ntawm Greek tsab ntawv tau (τ), sib npaug ntawm qhov tsis kam (R) lub sij hawm lub peev xwm (C): τ=R × C. Ib qho loj dua los yog lub peev xwm ua rau lub sij hawm ntev dua thiab yog li ncua sij hawm ntev dua.
Txhawm rau ua kom tiav lub timer, ib qho kev cuam tshuam los saib xyuas qhov voltage hla lub capacitor. Qhov no tuaj yeem yog transistor, Unijunction Transistor (UJT), lossis kev sib piv sib xyaw ua ke. Thaum qhov hluav taws xob no nce mus txog qhov tshwj xeeb, qhov pib ua ntej, qhov cuam tshuam cuam tshuam.
Qhov kev ua kom lub teeb liab no mus rau lub relay tsav tsheb Circuit Court. Tus neeg tsav tsheb muab qhov tsim nyog tam sim no los ua kom lub zog ntawm relay lub kauj, ua rau cov neeg tawm suab hloov pauv. Nyob rau hauv feem ntau adjustable analog timers, koj teem lub ncua los ntawm kev hloov cov kuj (R) nrog ib tug potentiometer.
Digital Delay Principple
Niaj hnub nimno relays feem ntau siv txoj hauv kev digital kom zoo dua qhov tseeb, ruaj khov, thiab yoog raws. Txoj kev no hloov pauv cov analog RC network nrog qhov tseeb, siv lead ua- tswj cov digital.
Lub hauv paus ntawm qhov system no yog lub moos ruaj khov. Qhov no feem ntau yog siv lead ua oscillator lossis ib qho chaw ruaj khov hauv RC oscillator hauv microcontroller lossis Daim Ntawv Thov -Specific Integrated Circuit (ASIC). Qhov oscillator no tsim cov kwj tsis tu ncua ntawm cov hluav taws xob tsis tu ncua, zoo li zuam ntawm lub moos.
Cov pulses pub rau hauv lub txee digital. Thaum tus neeg siv teeb tsa lub sijhawm ncua sijhawm xav tau, cov khoom siv hluav taws xob tau txhais lub sijhawm no rau hauv cov lej tshwj xeeb uas yuav tsum suav. Lub txee pib ntawm xoom thiab nce nrog txhua tus mem tes los ntawm oscillator.
Nyob rau tib lub sijhawm, tus sib piv cov digital txuas ntxiv xyuas cov nqi tam sim no ntawm lub txee tiv thaiv lub hom phiaj preset suav. Rau tag nrho lub sijhawm ntawm kev suav, tsis muaj dab tsi tshwm sim ntawm qhov tso zis.
The moment the counter's value matches the preset value, the comparator's output changes state. This output signal then activates the relay driver, which energizes the coil and switches the contacts. You can visualize this entire process as: [Oscillator] -> [Counter] -> [Comparator] ->[Relay Tsav Tsheb].
Kev sib piv
Kev xaiv ntawm ib qho analog thiab digital time relay yog qhov kev txiav txim siab tsim nyog. Nws nyob ntawm daim ntawv thov cov kev cai tshwj xeeb rau precision, nqi, thiab kev ua haujlwm. Txhua lub tshuab muaj qhov zoo thiab qhov tsis zoo.
Ib qho analog timer qhov txiaj ntsig tseem ceeb yog nws cov nqi qis thiab kev yooj yim. Qhov no ua rau nws tsim nyog rau cov ntawv thov tsis yog - qhov tseem ceeb uas tsis tas yuav tsum muaj qhov siab. Txawm li cas los xij, nws qhov tseeb tuaj yeem cuam tshuam los ntawm ib puag ncig yam.
Lub timer digital muaj qhov ua tau zoo tshaj plaws hauv txhua qhov kev ua haujlwm. Nws qhov raug thiab rov ua dua yog qhov kev txiav txim siab zoo dua. Nws muaj kev tiv thaiv ntau rau cov xwm txheej ib puag ncig uas cuam tshuam rau analog circuits. Qhov no ua rau nws tsuas yog kev xaiv rau kev tswj cov txheej txheem kev lag luam thiab cov ntawv thov xav tau kev ntseeg siab.
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Parameter |
Analog (RC{0}}Raws li) Sijhawm Relays |
Digital (Microcontroller/ASIC-Raws li) Sijhawm Relays |
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Qhov tseeb &Rov ua dua |
Tsawg (feem ntau ± 5% mus rau ± 10%), cuam tshuam los ntawm qhov kub thiab txias hloov pauv. |
Siab (feem ntau ± 0.1% lossis zoo dua), ruaj khov heev. |
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Lub Sijhawm Ntev |
Feem ntau txwv, luv luv. |
Dav thiab yoog raws, los ntawm milliseconds mus rau ntau pua teev. |
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Nqi |
Feem ntau tus nqi qis dua rau cov ntawv thov yooj yim, ruaj khov - lub sijhawm. |
Yuav ua tau kim dua, tab sis tus nqi qis dua. |
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Yooj yim |
Txwv tsis pub. Feem ntau ib leeg - ua haujlwm, ncua sijhawm los ntawm potentiometer. |
Yooj yim heev. Multi-function (nyob rau- ncua, tawm- ncua, ncua sijhawm, thiab lwm yam), kev teeb tsa digital. |
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Kev tiv thaiv kom nrov nrov |
Ntau qhov cuam tshuam rau hluav taws xob suab nrov thiab lub zog hloov pauv hloov. |
Feem ntau muaj zog dua nrog kev tiv thaiv suab nrov zoo dua. |
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Ideal Application |
Yooj yim, tsis yog - cov haujlwm tseem ceeb ntawm lub sijhawm uas tus nqi yog qhov kev txhawj xeeb tseem ceeb. |
Kev lag luam automation, kev tswj cov txheej txheem, cov khoom siv lab uas qhov tseeb thiab kev ntseeg tau yog qhov tseem ceeb. |
Decoding cov Schematics
Txhawm rau kom muaj txiaj ntsig zoo thiab daws teeb meem ib lub sijhawm relay, tus kws ua haujlwm yuav tsum muaj peev xwm nyeem thiab nkag siab nws daim duab hauv Circuit Court. Thaum cov qauv tsim tshwj xeeb sib txawv, lawv txhua tus sib koom ua ke ntawm cov haujlwm ua haujlwm.
Kev txheeb xyuas ib qho schematic tso cai rau peb los txuas cov ntsiab lus theoretical ntawm kev ncua sijhawm rau cov khoom siv lub cev uas ua rau kev ua haujlwm. Qhov no yog qhov tseem ceeb rau lub sij hawm relay circuit daim duab tsom xam.
Lub Circuit Court Anatomy
Ib lub sij hawm relay Circuit Court tuaj yeem tawg ua tsib ntu tseem ceeb. Txhua tus nyias muaj nyias lub luag haujlwm.
Tswv yim/Control Signal Section:Qhov no yog qhov uas cov teeb liab tshwm sim (xws li 24V DC, 230V AC) yog siv rau cov terminals, feem ntau sau npe A1 thiab A2. Tshooj lus no yuav suav nrog kev lim dej thawj zaug thiab kev tiv thaiv.
Fais fab mov Unit:Qhov hluav taws xob sab hauv no hloov cov hluav taws xob tswj hluav taws xob mus rau qhov ruaj khov, qis -voltage DC mov (piv txwv li, 5V lossis 12V) yuav tsum tau siv hluav taws xob rau lub sijhawm siv hluav taws xob.
Timing Generation Circuit Court:Qhov no yog lub plawv ntawm lub relay. Nws yog qhov analog RC network lossis digital oscillator-thiab- counter system peb tau tham yav dhau los. Nws yog lub luag haujlwm rau kev ntsuas qhov qeeb.
RelayTus tsav tsheb:Cov zis tawm los ntawm lub sijhawm luv luv yog qhov qis - lub zog logic teeb liab. Tus neeg tsav tsheb relay, feem ntau yog ib qho transistor lossis MOSFET, ua kom lub zog ntawm cov teeb liab no los muab cov tam sim no txaus los txhawb lub zog ntawm relay lub kauj.
Tso zis Relay& Tiv tauj:Qhov no yog electromechanical los yog khoom -state relay nws tus kheej. Thaum nws lub kauj yog lub zog los ntawm tus neeg tsav tsheb, nws cov neeg sib cuag - sau npe tias TSIS MUAJ (Nquag Qhib), NC (Nquag Kaw), thiab C (Common)- lub cev hloov lub voj voog.
Ntawm -Kev Ntsuas Circuit Court Delay
Ib lub voj voog raws li 555 timer IC yog ib qho piv txwv zoo rau kev txheeb xyuas ntawm - ncua sij hawm relay. Cia peb taug kev los ntawm nws cov kauj ruam ua haujlwm -los ntawm - kauj ruam, yog tias peb tab tom saib nws cov schematic.
Thaum pib, tsis muaj lub zog siv, lub sij hawm capacitor (C) raug tso tawm tag nrho los ntawm txoj hauv kev hauv 555 timer. Lub 555 cov zis yog tsawg, ua kom tus relay tsav transistor tawm, thiab lub relay coil yog de-energized.
Thaum lub hwj chim siv rau kev tswj cov tswv yim, cov khoom siv hluav taws xob sab hauv muab qhov hluav taws xob rau 555 timer thiab lwm yam hauv Circuit Court. Qhov kev txiav txim no pib lub sijhawm ua ntu zus. Lub sij hawm capacitor (C) pib them los ntawm lub sij hawm tseem ceeb resistor (R).
Raws li lub capacitor tsub nqi, 555 timer lub internal comparator txuas ntxiv saib xyuas qhov voltage ntawm lub capacitor. Nco ntsoov tias qhov zoo ntawm lub sij hawm capacitor yog qhov tseem ceeb rau qhov raug. Rau kev ua tau zoo dua, ib txwm siv qhov tsawg- cov pa tawm, zoo li tantalum lossis zaj duab xis capacitor, tsis yog tus qauv electrolytic rau lub sijhawm ua haujlwm.
Lub sijhawm lub sijhawm xaus thaum lub capacitor voltage nce mus txog qhov pib ntawm 2/3 ntawm cov khoom siv hluav taws xob. Nyob rau lub sijhawm no, 555 lub logic sab hauv tig nws cov khoom tso tawm los ntawm qis mus rau siab.
Qhov no nce voltage ntawm 555 tus tso zis tus pin tig rau ntawm tus neeg tsav tsheb relay transistor. Lub transistor tso cai rau tam sim no ntws los ntawm relay lub kauj, tsim ib qho chaw sib nqus uas hloov cov kev sib cuag tawm. Ib txwm suav nrog flyback diode (freewheeling diode) hla lub relay coil. Tsis nco qab qhov no yog ib qho yuam kev uas tuaj yeem rhuav tshem tus neeg tsav tsheb transistor vim qhov hluav taws xob hluav taws xob tsim thaum lub kauj yog de-energized.
Los ntawm Theory rau Practice
Kev nkag siab txog cov ntsiab cai ntawm lub sij hawm relays tsuas yog muaj txiaj ntsig thaum siv los daws cov teeb meem tiag - hauv ntiaj teb. Cia peb txheeb xyuas ob peb daim ntawv thov circuits kom pom tias cov cuab yeej no siv li cas hauv kev lag luam thiab kev lag luam.
Cov piv txwv no qhia tau hais tias yuav ua li cas rau - ncua thiab tawm - ncua kev ua haujlwm muab cov tswv yim daws teeb meem rau kev tiv thaiv kab ke, kev ua tau zoo, thiab kev ua raws li kev ua haujlwm.
Lub cev muaj zog pib- nce qeeb
Ib qho teeb meem tshwm sim hauv cov chaw tsim khoom yog qhov loj heev inrush tam sim no tau kos thaum ntau lub cav loj tau pib tib lub sijhawm. Qhov no tuaj yeem ua rau muaj hluav taws xob sags, kev mus ncig hauv Circuit Court breakers, thiab ua rau muaj kev ntxhov siab tsis zoo rau cov khoom siv hluav taws xob.
Txoj kev daws teeb meem yog siv cov txheej txheem ntawm - ncua sij hawm relays los tsim ib qho kev pib ua ntu zus. Txhua lub cev muaj zog pib ob peb feeb tom qab qhov dhau los. Qhov no nthuav tawm qhov siab tam sim no dhau sijhawm.
Nyob rau hauv daim duab ntaiv, kaw lub ntsiab pib hloov energizes tus contactor rau thawj lub cev muaj zog (M1) thiab ib txhij energizes lub kauj ntawm thawj zaug relay (TR1). M1 pib tam sim ntawd. TR1 pib nws countdown. Tom qab nws teem caij ncua (xws li, 5 vib nas this), TR1 cov neeg sib cuag kaw, energizing tus contactor rau lub thib ob lub cev muaj zog (M2) thiab coil ntawm lub sij hawm thib ob relay (TR2). Cov kab ke no txuas ntxiv rau tag nrho cov motors tom ntej.
Txias Ntxuam Control
Ntau yam khoom siv hluav taws xob lossis khoom siv hluav taws xob, xws li cov khoom siv hluav taws xob, lub tshuab hluav taws xob, lossis qhov cub ua haujlwm, ua kom muaj cua sov loj. Qhov cua sov no tuaj yeem ua rau muaj kev puas tsuaj yog tias nws tsis dissipated tom qab lub cuab yeej raug kaw.
Lub hwj chim- tawm ncua ncua sij hawm muab kev daws teeb meem zoo nkauj. Nws ua kom lub kiv cua txias txuas ntxiv mus rau lub sijhawm teem sijhawm tom qab lub zog tseem ceeb raug tua.
Hauv qhov hluav taws xob no, lub zog hloov hluav taws xob tseem ceeb muab lub zog rau ob qho tib si cov cuab yeej tseem ceeb thiab kev tswj cov tswv yim tawm ntawm - ncua sij hawm relay. Lub relay tus neeg sib cuag hloov lub xeev tam sim ntawd, tig lub kiv cua txias. Cov khoom siv thiab kiv cua khiav ua ke. Thaum tus neeg siv tua lub hwj chim loj, cov cuab yeej kaw tam sim ntawd. Txawm li cas los xij, qhov kev txiav txim no ua rau lub sijhawm tawm - ncua sijhawm, uas ua rau nws cov neeg raug kaw, tso cai rau tus kiv cua mus txuas ntxiv mus rau ntawm lub zog sib cais kom txog thaum lub sijhawm teem ua ntej tas sijhawm.
Tsis Siv Neeg Pump Control
Cia peb sib sau ua ke peb cov kev paub hauv cov ntaub ntawv tshawb fawb: tsim cov dej tsis siv neeg lub tank filling system uas siv lub sijhawm relay rau kev tiv thaiv twj tso kua mis.
Qhov xwm txheej yog tsim lub voj voog uas pib lub twj tso kua mis thaum lub tank dej qis thiab nres nws thaum qib siab. Qhov tseem ceeb, peb yuav tsum tiv thaiv lub twj tso kua mis los ntawm "kev caij luv luv" - nrawm nrawm yog tias cov dej ntws tawm ntawm qhov qis - qib sensor. Ib qho ntawm - ncua sij hawm relay yog qhov zoo rau qhov no.
Daim ntawv teev npe:
1 x 24V DC fais fab mov
1 x On-Ntev Sijhawm Relay (24V DC coil)
1 x Standard Control Relay (rau latching)
1 x Low-Level Float Switch (NC - Nquag Kaw thaum ntab qis)
1 x High-Level Float Switch (NC - Nquag Kaw thaum ntab nqis)
1 x Pump Motor Contactor
Lub logic Circuit Court yog tsim raws li hauv qab no. Tus txheej txheem tswj relay (CR1) tsim ib qho "latching" lossis "seal-in" circuit. Thaum qhov qis - qib hloov mus kaw (qhia dej qis), nws ua rau peb ntawm - ncua sij hawm relay (TR1).
Peb ntxiv qhov no 5-thib ob ntawm- ncua sijhawm kom ntseeg tau tias cov teeb liab qis qis ruaj khov thiab tsis yog ib ntus xwb. Qhov no tiv thaiv lub twj tso kua mis lub cev muaj zog los ntawm kev pib sai thiab nres, uas tuaj yeem ua rau cov neeg kho tshuab hnav thiab kev ntxhov siab hluav taws xob.
Tom qab 5- ncua sijhawm thib ob, TR1 cov neeg sib cuag tau kaw, ua kom lub zog latching relay CR1. CR1 cov neeg sib cuag ces kaw, energizing lub twj tso kua mis contactor, thiab lub twj tso kua mis pib. Lwm qhov kev sib cuag ntawm CR1 hla qhov hloov qis qis, "latching" lub voj voog kom lub twj tso kua mis txuas ntxiv mus txawm tias cov dej nce siab dhau los ntawm qhov ntsuas qis.
Lub twj tso kua mis txuas ntxiv mus rau lub tank kom txog thaum cov dej nce mus txog qhov siab - qib ntab hloov. Qhov kev hloov no yog xaim mus rau ib txwm kaw thiab qhib thaum dej nqa nws ntab. Thaum nws qhib, nws tawg lub voj voog mus rau latching relay's coil (CR1), ua rau nws de-energize. Lub twj tso kua mis contactor qhib, thiab lub twj tso kua mis nres, ua tiav lub voj voog.
Kev xav txog kev tshaj lij
Tshaj li txoj kev xav thiab daim ntawv thov, cov kws tshaj lij yuav tsum xav txog qhov ua tau zoo ntawm kev xaiv, txhim kho, thiab daws teeb meem lub sij hawm relays kom ntseeg tau tias muaj kev ntseeg siab thiab kev nyab xeeb.
Cov kev txiav txim siab zaum kawg no yog ua raws li kev paub dhau los thiab tuaj yeem tiv thaiv kev ua yuam kev uas ua rau poob qis thiab cov khoom siv tsis ua haujlwm.
Xaiv Txoj Cai Relay
Xaiv lub sij hawm kom raug relay los ntawm ntau txhiab tus qauv muaj tuaj yeem nyuaj. Siv daim ntawv tshuaj xyuas kom ntseeg tau tias txhua qhov kev ntsuas tseem ceeb tau ua tiav.
Tswj Voltage:Txuas lub relay lub coil voltage thiab hom (AC / DC) rau koj tswj Circuit Court (xws li, 24V DC rau PLC outputs, 120V AC rau kab-voltage control).
Lub Sijhawm Ua Haujlwm:Txiav txim siab qhov tseeb ua haujlwm xav tau. Puas yog ib qho yooj yim ntawm - ncua, tawm - ncua, lossis ntau txoj haujlwm zoo li lub sijhawm, voj voog, lossis hnub qub-delta? Multi-function relays muaj qhov hloov tau yooj yim tab sis tus nqi siab dua.
Lub Sijhawm Ntev:Xaiv ib tug relay nrog ntau yam uas yooj yim npog koj xav tau ncua. Lub relay nrog 0.1s rau 10s ntau yam tsis haum rau 5 feeb ncua.
Tso zisTiv tauj Configuration:Muaj pes tsawg lub voj voog cais koj xav tau hloov? Ib Tug Ncej Ob Chav Throw (SPDT) relay muab ib txheej NO / NC hu. Ib Ob Tug Ncej Thib Ob (DPDT) muab ob.
Load Requirements:Lub relay tus neeg yuav tsum tau ntsuas los tswj qhov voltage thiab tam sim no ntawm lub load. Hloov lub 10A lub cev muaj zog nrog 2A- ntsuas kev sib cuag yuav ua rau ua tsis tiav ntxov.
Kev khiav haujlwmIb puag ncig:Xav txog ambient kub, vibration, thiab humidity. Rau qhov hnyav ib puag ncig, xaiv cov relays uas tsim nyog IP (Ingress Protection) kev ntsuam xyuas thiab kev ua haujlwm kub ntau dua.
Cov lus qhia txog kev daws teeb meem
Thaum lub sij hawm relay tsis ua raws li qhov xav tau, cov txheej txheem kev daws teeb meem tuaj yeem txheeb xyuas qhov laj thawj sai sai.
Yog hais tias lub relay tsis qhib tag nrho, ua ntej, nco ntsoov xyuas cov kev tswj qhov hluav taws xob ntawm lub relay lub coil terminals (A1 / A2) nrog ib tug multimeter. Ib qho teeb meem tshwm sim yog qhov hluav taws xob poob ntawm cov xaim ntev ntev los yog lub zog fais fab, txawm tias qhov hluav taws xob zoo li raug.
Yog tias lub sijhawm tsis raug lossis tsis sib haum, tshwj xeeb tshaj yog nrog cov analog relays, qhov no feem ntau yog vim qhov kub thiab txias hloov pauv lossis lub zog tsis ruaj khov. Yog tias daim ntawv thov xav tau siab precision, kho dua tshiab rau digital relay yog qhov kev daws teeb meem zoo tshaj plaws thiab ruaj khov.
Yog hais tias lub relay "chatters" los yog cycles sai, qhov no feem ntau tshwm sim los ntawm ib tug fluctuating los yog "bouncy" tswj teeb liab, los yog hluav taws xob nrov. Qhov teeb meem yog feem ntau nyob rau hauv lub sensor los yog hloov muab lub trigger, tsis yog tus relay nws tus kheej. Ua raws li kev ncua, raws li peb tau ua hauv cov ntaub ntawv tswj lub twj tso kua mis, yog ib qho kev daws teeb meem classic los daws qhov teeb meem tsis ruaj khov.
Mastering Lub Sijhawm Tswjhwm
Peb tau taug kev los ntawm cov ntsiab lus tseem ceeb ntawm lub sijhawm relay mus rau cov ntsiab lus tsis sib xws ntawm nws cov txheej txheem hauv ncua sijhawm. Peb tau tshuaj xyuas ob qho tib si analog RC thiab digital counter hauv paus ntsiab lus, kawm los soj ntsuam schematics, thiab siv cov kev paub no rau kev tswj lub cev muaj zog thiab twj tso kua mis automation designs.
Nkag siab txog cov ntsiab cai tseem ceeb ntawm kev tsim hluav taws xob thiab kev ua haujlwm yog tus yuam sij rau kev siv sijhawm thiab tswj tau zoo hauv txhua qhov khoom siv hluav taws xob lossis automation project.
Nrog rau qhov kev paub dav no, tam sim no koj tau nruab rau xaiv, tsim nrog, thiab daws teeb meem lub sijhawm relays ntseeg siab, hloov cov tswv yim theoretical rau hauv kev ntseeg tau thiab ntse tiag -lub ntiaj teb.
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