Taw qhia los kuaj qhov zoo ntawm cov zaus hloov dua siab nrog lub multimeter
Raws li yog paub zoo, muaj ntau txoj kev tiv thaiv, xws li overcurrent, overvoltage, kev tiv thaiv ntau dhau, thiab lwm yam kev tiv thaiv. Nrog rau kev txhim kho txuas ntxiv ntawm kev muaj tshuab kev lag luam, cov hloov pauv ntau zaus kuj tau siv dav.
Nyob rau hauv cov txheej txheem ntawm Circuit Cread, engineers inevitably yuav tsum tau ntsuas qee cov twj paj nruag ntsuas. Cov kws ua encersers paub hais tias ib tug multively tuaj yeem ntsuas DC tam sim no, AC Voltage, thiab DC voltage. Thiab cov zaus hloov pauv yog lub cuab yeej uas tswj hwm AC los ntawm kev kho cov kev ua haujlwm ntawm lub cev muaj zog. Kab lus no yuav piav qhia yuav ua li cas siv ntau qhov kev ntsuas ntsuas qhov zoo ntawm ntau zaus converter.
Nws yuav tsum raug sau tseg tias rau kev nyab xeeb ntawm tus kheej, lub tshuab yuav tsum tau tsav tawm thiab cov kab hluav taws xob cov hluav taws xob yuav tsum tau muab tshem tawm ua ntej ua haujlwm! Ua ntej, teeb tsa ntau ntau rau "txoj haujlwm thib ob" txoj haujlwm, thiab tom qab ntawd siv cov nuj nqis liab thiab dub ntawm cov kauj ruam hauv qab no:
Qhov kev sojntsuam dub sib cuag tus ncej tsis zoo P (+) ntawm DC npav, thiab T Hauv cov kab, sau cov qauv pom ntawm tus nqi ntawm multimeter ntawm multimeter. Tom qab ntawd kov cov kev sojntsuam liab rau n (-}), thiab t kov cov kev sojntsuam dub rau R, S, sau cov ntawv tso tawm, sau cov zaub muaj nuj nqis ntawm cov nqi multimeter. Yog tias muaj 6 qhov tseem ceeb muaj nuj nqis yog qhov tseeb sib npaug, nws qhia tau tias tsis muaj teeb meem nrog Rectifier lossis muag pib thev taus. Txwv tsis pub, yog tias lub rectifier module lossis mos pib resistort ntawm qhov chaw sib xws yog puas ntsoog, qhov tshwm sim yog: tsis muaj zaub.
Qhov kev sojntsuam Red tus ncej tsis zoo P (+) ntawm DC npav, thiab cov kev sojntsuam dub, sau cov qauv pom ntawm tus nqi ntawm multimeter ntawm multimeter. Tom qab ntawd kov cov kev sojntsuam dub rau n (-) Thiab cov kev sojntsuam liab rau U, V, thiab sau cov ntawv pom ntawm tus nqi ntawm multimeter. Yog hais tias muaj 6 qhov tseem ceeb muaj nuj nqis yog qhov tseeb sib npaug, nws qhia tau tias tsis muaj teeb meem nrog IGBT inverter module ntawm zaus hloov pauv. Txwv tsis pub, yog tias lub IGBT inverter module ntawm txoj haujlwm sib haum yog puas, qhov tshwm sim yog: tsis muaj qhov tsim tawm lossis ua txhaum.
Siv kev hloov pauv zaus kom tsav lub cev muaj zog li asynchronous nrog txuam rau ntawm qhov chaw rau tsis muaj kev lag luam f} pa f ntawm 50Hz mus rau qis zaus.
Thaum lub sijhawm tus txheej txheem no, siv cov ammeter los kuaj qhov tsis muaj - phoo tam sim no ntawm lub cev muaj zog. Yog tias tsis muaj {{2} Cov khoom siv tam sim no tseem ruaj khov thaum lub zaus tsawg dua thiab tuaj yeem nyob twj ywm tsis hloov pauv, ces nws yog qhov hloov pauv zoo.
Qhov tsawg kawg nkaus zaus tuaj yeem raug suav raws li hauv qab no: (synchronous ceev {. Piv txwv li zaus ntawm 14. Piv txwv li zaus, muaj qhov tsawg kawg ntawm (1500-1470)}} Hz.
Tsis muaj teeb meem nrog lub ntsej muag muag muag uas muag, txwv tsis pub cov ntaub ntawv hluav taws xob lossis muag pib resistor ntawm txoj haujlwm sib raug puas tsuaj, thiab tsis muaj zaub.
Qhov kev sojntsuam Red tus ncej tsis zoo P (+) ntawm DC npav, thiab cov kev sojntsuam dub, sau cov qauv pom ntawm tus nqi ntawm multimeter ntawm multimeter. Tom qab ntawd kov cov kev sojntsuam dub rau n (-) Thiab cov kev sojntsuam liab rau U, V, thiab sau cov ntawv pom ntawm tus nqi ntawm multimeter. Yog hais tias muaj 6 qhov tseem ceeb muaj nuj nqis yog qhov tseeb sib npaug, nws qhia tau tias tsis muaj teeb meem nrog IGBT inverter module ntawm zaus hloov pauv. Txwv tsis pub, yog tias lub IGBT inverter module ntawm txoj haujlwm sib haum yog puas, qhov tshwm sim yog: tsis muaj qhov tsim tawm lossis ua txhaum.
Siv kev hloov pauv zaus kom tsav lub cev muaj zog li asynchronous nrog txuam rau ntawm qhov chaw rau tsis muaj kev lag luam f} pa f ntawm 50Hz mus rau qis zaus.
Thaum lub sijhawm tus txheej txheem no, siv cov ammeter los kuaj qhov tsis muaj - phoo tam sim no ntawm lub cev muaj zog. Yog tias tsis muaj {{2} Cov khoom siv tam sim no tseem ruaj khov thaum lub zaus tsawg dua thiab tuaj yeem nyob twj ywm tsis hloov pauv, ces nws yog qhov hloov pauv zoo.
