Yuav ua li cas mus kuaj ib tug transformer nrog ib tug multimeter
Txheem
Los ntawm cov chav loj ntawm cov kab hluav taws xob mus rau cov chav me me hauv cov khoom siv xws li lub xov tooj chargers, transformers tuaj nyob rau hauv tag nrho cov duab thiab ntau thiab tsawg.
Txawm li cas los xij, lawv ua haujlwm zoo ib yam, kom ntseeg tau tias koj cov khoom siv thiab cov khoom siv tau muab nrog pes tsawg voltage lawv yuav tsum ua haujlwm kom raug.
Txawm li cas los xij, zoo li lwm yam khoom siv hluav taws xob, transformers txhim kho qhov tsis zoo.
Hloov lawv tej zaum yuav yog ib qho kev xaiv uas koj tsis xav siv, yog li ua li cas koj kuaj tau lub tshuab hloov pauv thiab txiav txim siab qhov tsim nyog nws xav tau?
Zaj lus no muab cov lus teb rau qhov no, vim hais tias peb muab cov ntaub ntawv hais txog yuav ua li cas lub transformer ua hauj lwm, thiab hais txog ntau yam kev kuaj xyuas nws faults.
Yog tsis muaj ado ntxiv, cia peb pib.
Dab tsi yog transformer
Lub transformer yog ib qho khoom siv uas hloov cov teeb liab tam sim no (AC) los ntawm qhov hluav taws xob siab mus rau qhov tsis tshua muaj hluav taws xob lossis lwm qhov.
Lub transformer uas hloov mus rau qhov tsis muaj peev xwm sib txawv yog hu ua kauj ruam down transformer thiab yog qhov ntau dua ntawm ob qho uas ua haujlwm rau peb txhua hnub.
Cov kauj ruam-down transformers ntawm cov kab hluav taws xob nqis nqis ntau txhiab qhov hluav taws xob mus rau qhov tsis tshua muaj hluav taws xob 240V rau kev siv hauv tsev.
Peb cov khoom siv ntau yam xws li lub laptop txuas, xov tooj chargers thiab txawm tias lub tswb nrov siv lawv tus kheej hloov pauv.
Lawv txo qhov voltage kom tsuas yog 2V kom lub cuab yeej ua haujlwm.
Ib qho kev xaiv rau cov no yog hu ua step-up transformer thiab feem ntau yog siv nyob rau hauv central fais fab nroj tsuag kom muaj zog rau kev faib.
Txawm li cas los xij, peb txaus siab rau cov kauj ruam-down transformers, vim qhov no yog qhov peb feem ntau cuam tshuam nrog. Tab sis lawv ua haujlwm li cas?
Yuav Ua Li Cas Kauj Ruam Down Transformers Ua Haujlwm
Kauj ruam-down transformers siv ob coils, tseem hu ua windings. Cov no yog cov thawj kauj thiab cov kauj ruam thib ob.
Lub hauv paus kauj yog cov khoom siv hluav taws xob tau txais tam sim no los ntawm AC voltage qhov chaw xws li cov kab hluav taws xob.
Lub coil thib ob yog cov khoom siv hluav taws xob uas xa cov teeb liab qis rau cov khoom siv hauv koj lub tsev.
Txhua kauj yog raug mob ntawm ib tug tub ntxhais thiab thaum tam sim no dhau los ntawm thawj kauj, ib tug magnetic teb yog tsim uas induces tam sim no nyob rau hauv lub thib ob kauj.
Nyob rau hauv kauj ruam down transformers, thawj winding muaj ntau lem tshaj lub thib ob winding. Tsis mus rau hauv cov ntsiab lus, tus naj npawb ntawm windings yog ncaj qha proportional rau qhov voltage ntawm lub electromagnetic quab yuam (EMF) generated los ntawm lub kauj.
Los ntawm ~ V
Wb hu rau lub input winding ntawm lub kauj W1, cov zis winding ntawm lub kauj W2, lub input voltage E1 thiab cov zis voltage E2. Kauj ruam-down transformers muaj ntau lem ntawm input coil tshaj cov zis coil.
P1 > P2
Qhov no txhais tau hais tias qhov voltage ntawm cov zis (secondary) coil yog qis dua qhov voltage ntawm input coil.
E2 <E1
Yog li qhov siab AC voltage hloov mus rau qis. Tsis tas li ntawd, ib qho hluav taws xob siab dua yog dhau los ntawm cov kauj kauj ruam thib ob kom sib npaug lub peev xwm ntawm ob qho tib si windings.
Transformers tsis yog txhua yam, tab sis nws yog qhov kev paub yooj yim uas koj xav tau ua ntej kuaj koj lub tshuab hloov pauv.
Yog tias koj xav tias koj lub tshuab hluav taws xob tsis ua haujlwm zoo, koj tsuas yog xav tau ib lub ntsuas ntsuas los ntsuas nws.
Yuav ua li cas mus kuaj ib tug transformer nrog ib tug multimeter
Txhawm rau kuaj lub tshuab hluav taws xob, koj siv lub tshuab hluav taws xob los ntsuas AC voltage nyeem ntawm qhov chaw nkag thiab cov zis tawm thaum lub transformer txuas nrog. Koj kuj tseem siv lub tshuab hluav taws xob los ntsuas qhov txuas ntxiv ntawm lub tshuab hloov pauv thaum nws tsis txuas nrog ib qho hluav taws xob. .
Lawv yuav piav qhia ntxiv.
Input thiab output tests
Feem ntau, qhov kev ntsuam xyuas no tsuas yog ua los ntawm cov zis terminals ntawm lub transformer.
Txawm li cas los xij, txhawm rau xyuas kom meej qhov kev nyeem ntawv los ntawm cov zis terminals, koj yuav tsum nco ntsoov tias qhov hluav taws xob siv rau lawv kuj yog qhov tseeb. Tias yog vim li cas koj thiaj li sim koj qhov chaw nkag.
Rau cov khoom siv hauv tsev, cov khoom siv hluav taws xob yog feem ntau yog cov qhov (socket) hauv cov phab ntsa. Koj xav xyuas tias lawv muab qhov tseeb ntawm qhov voltage.
Txhawm rau ua qhov no, ua raws cov kauj ruam no
- Teem lub multimeter rau 200 VAC.
- Muab cov multimeter coj mus rau lub hwj huam mov. Rau phab ntsa qhov hluav taws xob, koj tsuas yog ntxig cov xov hlau rau hauv qhov hluav taws xob qhov hluav taws xob.
Koj cia siab tias yuav pom tus nqi ntawm 120V thiab 240V, tab sis nws nyob ntawm.
Yog tias cov ntawv nyeem tsis raug, koj lub hwj chim yuav ua rau muaj teeb meem. Yog hais tias cov kev nyeem ntawv yog lawm, mus xyuas cov zis terminals ntawm lub transformer. Ua nws,
- Txuas lub transformer rau lub hwj chim mov
- Txo qhov voltage ntau ntawm lub multimeter
- Muab cov multimeter ua rau ntawm cov zis terminals ntawm koj lub transformer.
- Tshawb xyuas cov ntawv nyeem
Los ntawm saib cov ntawv nyeem ntawm lub multimeter, koj xyuas seb qhov txiaj ntsig puas yog. Ntawm no koj tab tom saib cov lus pom zoo tso tawm cov yam ntxwv ntawm lub transformer los kos cov lus xaus.
Transformer integrity check
Transformer continuity testing yog nqa tawm nyob rau hauv thiaj li yuav xyuas kom meej tias tsis muaj qhib los yog luv luv Circuit Court nyob rau hauv lub coils. Koj khiav qhov kev sim no thaum lub transformer raug txiav tawm ntawm lub hwj chim mov. Koj ua dab tsi?
- Teem lub ntsuas multimeter rau Ohm lossis Resistance. Qhov no feem ntau yog qhia los ntawm lub cim (Ω).
- Muab cov coj ntawm ib lub multimeter rau txhua qhov kev tawm tswv yim ntawm koj lub transformer.
Qhov twg lub transformer muaj luv luv Circuit Court, lub multimeter yuav muab siab heev los yog infinite nyeem. Infinite Reading yog sawv cev los ntawm "OL" uas sawv cev rau "Open Loop".
Yog hais tias cov input terminals zoo li qub, koj rov ua cov txheej txheem no rau cov zis terminals.
Nyob rau hauv cov ntaub ntawv uas ib yam ntawm cov terminals muab ib tug siab los yog infinite tus nqi, lub transformer yuav tsum tau hloov. Ntawm no yog ib daim vis dis aus qhia txog cov txheej txheem no.
xaus
Transformer diagnostics yog cov txheej txheem uas yuav tsum tau ua tib zoo saib xyuas, tshwj xeeb tshaj yog thaum kuaj xyuas cov tswv yim thiab cov khoom tawm.
Txawm li cas los xij, koj yuav tsum nco ntsoov tias transformers feem ntau muaj lub neej ntev. Ib qho teeb meem nrog lawv qhia tias muaj kev ua haujlwm tsis zoo nyob rau lwm qhov hauv hluav taws xob hluav taws xob.
Hauv qhov no, nws raug nquahu kom saib xyuas cov hloov pauv tshiab tshiab rau lub suab tsis zoo, nrog rau xyuas tias lwm qhov ntawm lub voj voog, xws li fuses, yog qhov zoo.
Cov lus nug nquag nug
Yuav ua li cas paub yog tias lub transformer faulty?
Yog tias lub tshuab hluav taws xob tsis ua haujlwm, koj tuaj yeem paub tias lub cuab yeej tsis ua haujlwm, lub tshuab hluav taws xob tsis tu ncua tig tawm, lossis koj hnov qhov hloov pauv buzzing. Lub 'meter' kuj tseem yuav pab koj tshawb xyuas ntxiv ntawm cov coils thiab lawv qhov ntsuas hluav taws xob.
Koj yuav ua dab tsi los ntsuas qhov txuas ntxiv ntawm lub transformer?
Txhawm rau txheeb xyuas qhov tseeb ntawm lub transformer, disconnect nws thiab tso lub meter probes ntawm lub input terminals. Yog hais tias cov terminals tso tawm ib tug siab los yog infinite "OL" tus nqi, ces tsis muaj continuation. Tib yam muaj tseeb rau cov zis terminals.
Yuav ua li cas thaum lub transformer tsis ua hauj lwm?
Thaum lub tshuab hloov pauv tsis ua haujlwm, lub cuab yeej yuav tsis ua haujlwm, lossis koj tuaj yeem hnov tus humming lossis humming suab los ntawm lub tshuab hloov pauv.
Dab tsi yog qhov tsis kam ntawm transformer?
Qhov kev tiv thaiv ntawm lub transformer nyob ntawm lub cuab yeej nws yog npaj rau lub hwj chim. Koj yuav tsum xyuas cov yam ntxwv ntawm lub transformer los kos cov lus xaus.
