Nrog rau kev tsim kho tshiab ntawm kev lag luam thev naus laus zis, lub zog hloov pauv lub cev muaj zog ntau dua thiab siv dav dua, thiab nws tus kheej thev naus laus zis kuj tseem ntau thiab ntau dua. Lub sijhawm poob qis yuav ua rau cov nqi kho tsis tau zoo thiab kev poob nyiaj txiag. Yuav ua li cas kom ntseeg tau tias kev noj qab haus huv thiab kev ua haujlwm zoo ntawm lub cev muaj zog tau dhau los ua qhov teeb meem kev txhawj xeeb tshaj plaws rau kev ua haujlwm thiab tu engineers.
Fluke 378 tsis tiv tauj ntse voltage clamp meter tau yooj yim ntsuas peb-theem voltage thiab tam sim no, thiab tuaj yeem ua rau muaj teeb meem xws li kev sib haum xeeb ntau dhau lossis tsis muaj zog. Nws muaj kev nyab xeeb thiab muaj txiaj ntsig, thiab pab koj txhim kho koj txoj kev taug kev "clamping".
Txij li thaum lub cev muaj zog tsis ua haujlwm feem ntau cuam tshuam nrog cov cuab yeej tsis ua haujlwm thiab teeb meem hluav taws xob, cov khoom siv thiab cov ntsuas hluav taws xob tseem raug kuaj xyuas thaum daws teeb meem lub cev tsis ua haujlwm. Cov kws tshaj lij thiab kev ua haujlwm feem ntau tsim cov phiaj xwm kev tiv thaiv kev saib xyuas kev ua haujlwm ntawm circuits, khoom siv, thiab lub cev muaj zog thaum muaj kev tsis ua haujlwm. Yuav ua li cas los tsim kom muaj kev npaj kho kom zoo? Peb muaj plaub nqe lus qhia rau koj siv:
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Thaum pib lub cev muaj zog, sau cov ntsuas ntsuas ntawm qhov kev ua haujlwm tsis ua haujlwm
Thawj kauj ruam ntawm kev tiv thaiv kev saib xyuas yog sau tseg thiab txuag cov tsis txwv ntawm cov khoom siv nyob rau hauv thawj qhov kev ua haujlwm, nrog rau kev ua haujlwm ib puag ncig, cov cuab yeej siv kev ntsuas, kev tso cai yuam kev, thiab lwm yam. Lub hom phiaj ntawm cov kauj ruam no yog kom txuag tau tus nqi siv ntawm qhov zoo tshaj plaws. lub xeev ntawm cov khoom siv. Hauv kev ua haujlwm txij nkawm yav tom ntej, cov teeb meem muaj peev xwm tuaj yeem pom tsuas yog los ntawm kev sib piv qhov sib txawv ntawm tus nqi ntsuas thiab tus nqi siv.
Txhua lub cuab yeej kho vajtse yuav raug hnav thaum siv, tab sis txoj kev teeb tsa zoo tshaj plaws thiab siv cov xwm txheej tuaj yeem txuas ntxiv lub sijhawm siv ntawm lub cuab yeej. Ua ntej yuav muab tso rau hauv kev siv, ua tib zoo xyuas seb puas muaj cov teeb meem no:
Lub cev muaj zog mounting taw: seb lub cev muaj zog mounting taw yog txawm
Kev xa tawm sab nraud: Ceev faj kom xa cov quab yuam ua rau lwm yam khoom siv rau lub cev muaj zog
Ncej Voltage: Thaum qhov hluav taws xob ntawm lub cev muaj zog tshaj qhov muaj peev xwm insulating ntawm cov kabmob, tam sim no ntws los ntawm cov kabmob
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Txhim kho kev tiv thaiv kev tiv thaiv kab mob thiab ua tiav cov kev ntsuam xyuas raws sij hawm
Tom qab tau txais cov kev ua haujlwm thawj zaug, peb muaj tus nqi siv yooj yim tshaj plaws. Hauv kev ua haujlwm tom qab thiab kev saib xyuas kev ua haujlwm, ib qho ntawm cov cuab yeej tseem ceeb yog ib qho infrared thermal imager, uas pab peb kom ceev ceev saib xyuas qhov kub thiab txias ntawm cov motors thiab lwm yam khoom siv. Nws raug nquahu kom koj siv lub koob yees duab Fluke Ti480Pro thermal imaging lub koob yees duab kom ceev nrooj saib seb qhov ntsuas kub ntawm lub cuab yeej siab dhau lossis qis dhau, yog li peb tuaj yeem tshawb xyuas cov teeb meem thiab tsis ua haujlwm ua rau qhov tob ntxiv.
Lub koob yees duab ntsuas cua sov (xws li Fluke Ti 480Pro) pab peb pom cov teeb meem ntxov thiab tshem tawm cov phom sij zais
Nrog rau lub sijhawm dhau mus, cov khoom siv yuav inevitably hnav los yog ua tsis tiav. Lub hom phiaj ntawm kev tiv thaiv kev saib xyuas yog hloov cov khoom hnav hauv lub sijhawm kom tiv thaiv ntau qhov chaw los ntawm kev puas tsuaj thiab ua rau poob nyiaj txiag. Cov teeb meem siv cuab yeej muaj xws li:
Misalignment: Misalignment ntawm lub cev muaj zog tsav ncej thiab lub load
Unbalanced: Qhov nruab nrab ntawm lub rotor tsis nyob ntawm tus ncej
Loose ncej: Qhov sib txawv ntawm rotor thiab stator hauv lub cev muaj zog loj heev
Bearing coj: nto zawv zawg rau ib leeg
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Khaws thiab sau cov nqi ntsuas ntawm txhua qhov kev saib xyuas rau kev soj ntsuam ntawm cov khoom siv
Khaws cov khoom siv tsis tau thiab cov duab thermal ntawm txhua qhov kev sim. Yog tias koj pom tias cov txiaj ntsig no hloov pauv ntau dua 10 feem pua -20 feem pua , koj yuav tsum ua tib zoo saib thiab tshuaj xyuas cov laj thawj ntawm cov kev hloov no kom ntxaws. Qee cov khoom siv lossis cov khoom siv yuav raug txwv tsis pub hloov pauv, nyob ntawm qhov xwm txheej.
Lub inverter muaj qhov kawg input thiab tso zis kawg, thiab yog ib qho tseem ceeb ntawm kev ua haujlwm thiab kev ua haujlwm, uas yuav tsum tau saib xyuas tshwj xeeb. Ntsuas thiab txheeb xyuas cov teeb meem cuam tshuam nrog qhov tseeb rms multimeter thiab hloov pauv zaus lub cev muaj zog tsav ntsuas ntsuas. Fluke MDA550III muab cov ntawv qhia zaub mov uas tuaj yeem txiav txim siab thiab ua tau zoo txheeb xyuas qhov cuam tshuam txog lub cev muaj zog ntawm lub cev, thiab tuaj yeem tsim cov ntawv xeem rau cov neeg siv kom txuag tau qhov kev xeem. Siv nws, koj tuaj yeem sim sai sai cov teeb meem hauv qab no:
Tshawb xyuas cov zis tawm, tsom rau V / F yog tias lub cev muaj zog los yog tsis muaj lub zog txaus
Sigma Current: Stray current circulating in the system
Ncej voltage: raws sij hawm nrhiav kom tau qhov kev pheej hmoo ntawm ntau tshaj ncej voltage
Ntxiv nrog rau lub cev muaj zog tsav analyzers, handheld oscilloscopes,
Xws li Fluke120B series, kuj tuaj yeem yooj yim pab koj sim waveforms los txiav txim siab seb yuav ua li cas.
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Tsom ntsoov rau kev hloov pauv thiab txheeb xyuas cov laj thawj ntawm kev hloov pauv
Thaum ib qho kev ntsuas ntsuas tau tsim, kev sim tsis tu ncua tau ua tiav, thiab cov txiaj ntsig kev xeem raug kaw, peb tuaj yeem ua qhov kev soj ntsuam zoo raws li cov no. Ib lub tswv yim tsim nyog kev tsom xam tuaj yeem pab peb pom ntau yam teeb meem txog lub zog zoo, xws li:
Transient Voltages: Transient voltages tuaj yeem ua rau muaj zog hluav taws xob
Voltage thiab tam sim no imbalance: voltage magnitude los yog theem sib txawv
Harmonic Distortion: High-frequency AC voltage los yog tam sim no input rau lub cav windings
Active txij nkawm tsis yog kev saib xyuas passive
Thaum cov kev pabcuam engineers thiab cov kws tshaj lij tau nruab nrog cov cuab yeej tsim nyog, kev txawj ntse thiab cov ntaub ntawv yooj yim, peb tuaj yeem txheeb xyuas cov teeb meem muaj peev xwm ntawm lub cev muaj zog ua ntej lawv loj. Ua raws li plaub kauj ruam uas tau piav qhia saum toj no yuav pab peb ntes cov teeb meem ntawm lub cev muaj zog ua ntej lawv ua tsis tiav, uas yuav ua rau kom tsis txhob hloov khoom siv thiab lub sijhawm poob.
