Yuav ua li cas siv ib tug multimeter los ntsuas qhov zoo ntawm lub inverter
Raws li peb txhua tus paub, zaus converters muaj ntau yam kev tiv thaiv, xws li overcurrent, overvoltage, overload tiv thaiv, thiab lwm yam. Nrog rau kev txhim kho tas mus li ntawm industrial automation, zaus converters kuj tau lug siv.
Thaum lub sij hawm tsim cov txheej txheem ntawm hluav taws xob circuits, engineers inevitably xav tau multimeters los ntsuas ib co ntsuas ntsuas. Cov kws tshaj lij txhua tus paub tias lub tshuab hluav taws xob tuaj yeem ntsuas DC tam sim no, AC voltage, thiab DC voltage. Lub zaus converter yog ib qho khoom siv uas tswj lub AC lub cev muaj zog los ntawm kev hloov kho lub zog ua haujlwm ntawm lub cev muaj zog. Kab lus no yuav piav qhia rau koj yuav ua li cas siv multimeter los ntsuas qhov zoo ntawm inverter.
Nws yuav tsum tau muab sau tseg tias rau tus kheej kev nyab xeeb, lub tshuab yuav tsum tau muab tshem tawm thiab lub input fais fab hlau R, S, T thiab tso zis hlau U, V, W ntawm lub inverter yuav tsum tau muab tshem tawm ua ntej ua hauj lwm! Ua ntej, teeb lub multimeter mus rau qhov chaw "secondary tube", thiab tom qab ntawd siv cov xim liab thiab xim dub coj ntawm multimeter los kuaj raws li cov kauj ruam hauv qab no:
Qhov kev sim dub lead tiv thaiv tus ncej tsis zoo P (+) ntawm lub tsheb npav DC, thiab qhov kev sim liab liab coj mus rau R, S, thiab T nyob rau hauv ib ntus, thiab sau cov nqi tso tawm ntawm lub multimeter. Tom qab ntawd kov qhov kev sim liab coj mus rau N (-), thiab qhov kev sim dub ua rau R, S, thiab T nyob rau hauv ib ntu los sau cov nqi tso tawm ntawm multimeter. Yog hais tias rau qhov tso tawm qhov tseem ceeb yog qhov sib npaug, nws txhais tau hais tias tsis muaj teeb meem nrog lub diode rectifier lossis soft-start resistor ntawm zaus converter. Txwv tsis pub, lub rectifier module lossis soft-start resistor ntawm qhov chaw sib raug yog puas, thiab qhov tshwm sim yog: tsis muaj zaub.
Kev kuaj liab lead tiv thaiv tus ncej tsis zoo P (+) ntawm lub tsheb npav DC, thiab qhov kev sim dub lead tiv tauj U, V, thiab W nyob rau hauv ib ntus, thiab sau cov nqi tso tawm ntawm lub multimeter. Tom qab ntawd kov qhov kev sim dub coj mus rau N (-), thiab qhov kev sim liab ua rau U, V, thiab W ua ntu zus los sau cov nqi tso tawm ntawm multimeter. Yog hais tias rau qhov tso tawm qhov tseem ceeb yog qhov sib npaug, nws qhia tau tias tsis muaj teeb meem nrog IGBT inverter module ntawm zaus converter. Txwv tsis pub, IGBT inverter module ntawm qhov chaw sib raug raug puas ntsoog, thiab qhov tshwm sim yog: tsis muaj qhov tso tawm lossis ua txhaum.
Siv lub tshuab hloov zaus los tsav lub asynchronous lub cev muaj zog nrog lub zog sib txuam kom khiav tsis muaj kev thauj khoom ntawm qhov chaw, kho qhov zaus f, thiab pib txo los ntawm 50Hz mus rau qhov qis tshaj plaws.
Thaum lub sijhawm ua haujlwm no, siv lub ammeter los kuaj xyuas qhov tsis muaj kev thauj khoom tam sim no ntawm lub cev muaj zog. Yog hais tias qhov tsis muaj-load tam sim no ruaj khov thaum lub sij hawm txo cov txheej txheem thiab tseem tsis tau hloov, ces nws yog ib qho zoo inverter.
Qhov tsawg kawg nkaus zaus tuaj yeem suav tau raws li hauv qab no, (synchronous ceev - ntsuas ceev) × tus naj npawb ntawm ncej khub p÷60. Piv txwv li, ib tug 4-ncej lub cev muaj zog muaj qhov ntsuas ceev ntawm 1470 rpm thiab tsawg zaus=(1500-1470) × 2÷60=1Hz.
Tsis muaj teeb meem nrog lub soft-start resistor. Txwv tsis pub, lub rectifier module lossis soft-start resistor ntawm qhov chaw sib raug yog puas. Phenomenon: tsis muaj zaub.
Kev kuaj liab lead tiv thaiv tus ncej tsis zoo P (+) ntawm lub tsheb npav DC, thiab qhov kev sim dub lead tiv tauj U, V, thiab W nyob rau hauv ib ntus, thiab sau cov nqi tso tawm ntawm lub multimeter. Tom qab ntawd kov qhov kev sim dub coj mus rau N (-), thiab qhov kev sim liab ua rau U, V, thiab W ua ntu zus los sau cov nqi tso tawm ntawm multimeter. Yog hais tias rau qhov tso tawm qhov tseem ceeb yog qhov sib npaug, nws qhia tau tias tsis muaj teeb meem nrog IGBT inverter module ntawm zaus converter. Txwv tsis pub, IGBT inverter module ntawm qhov chaw sib raug raug puas ntsoog, thiab qhov tshwm sim yog: tsis muaj qhov tso tawm lossis ua txhaum.
Siv lub tshuab hloov zaus los tsav lub asynchronous lub cev muaj zog nrog lub zog sib txuam kom khiav tsis muaj kev thauj khoom ntawm qhov chaw, kho qhov zaus f, thiab pib txo los ntawm 50Hz mus rau qhov qis tshaj plaws.
Thaum lub sijhawm ua haujlwm no, siv lub ammeter los kuaj xyuas qhov tsis muaj kev thauj khoom tam sim no ntawm lub cev muaj zog. Yog hais tias qhov tsis muaj-load tam sim no ruaj khov thaum lub sij hawm txo cov txheej txheem thiab tseem tsis tau hloov, ces nws yog ib qho zoo inverter.
Qhov tsawg kawg nkaus zaus tuaj yeem suav tau raws li hauv qab no, (synchronous ceev - ntsuas ceev) × tus naj npawb ntawm ncej khub p÷60. Piv txwv li, ib tug 4-ncej lub cev muaj zog muaj qhov ntsuas ceev ntawm 1470 rpm thiab tsawg zaus=(1500-1470) × 2÷60=1Hz.
Kev txheeb xyuas ntawm AC thiab DC solid-state relays: Feem ntau, nyob ib sab ntawm cov tswv yim thiab cov zis tawm ntawm DC solid-state relay plhaub, muaj "+" thiab "-" cov cim, thiab cov lus "Dc input" thiab "DC tso zis "yog cim. Txawm li cas los xij, AC solid-state relays tsuas yog cim nrog "+" thiab "-" cov cim ntawm lub davhlau ya nyob twg input, thiab cov zis davhlau ya nyob twg tsis muab faib ua qhov zoo thiab qhov tsis zoo.
Kev txheeb xyuas cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob: Unmarked solid-state relay, multimeter R × 10k ntau yam, thiab paub qhov txawv ntawm qhov input davhlau ya nyob twg thiab cov zis davhlau ya nyob twg los ntawm kev ntsuas tus nqi pem hauv ntej thiab thim rov qab ntawm txhua tus pin raws. Thaum qhov ntsuas rau pem hauv ntej ntawm ob tus pins me me thiab qhov rov qab ua haujlwm tsis muaj qhov kawg, ob tus pins no yog cov khoom siv nkag, thiab ob tus pins ntxiv yog cov zis terminals. Nyob rau hauv ib qho kev ntsuas nrog ib tug me me kuj, cov dub xeem lead yog txuas mus rau lub zoo input davhlau ya nyob twg thiab cov liab xeem lead yog txuas nrog rau qhov tsis zoo input davhlau ya nyob twg.
Yog hais tias qhov ntsuas rau pem hauv ntej thiab thim rov qab tsis kam ntawm ib qho ob tus pins yog ob qho tib si 0, nws txhais tau hais tias lub zog-lub xeev relay tau tawg thiab puas lawm. Yog hais tias qhov kev tiv thaiv rau pem hauv ntej thiab rov qab qhov tseem ceeb ntawm txhua tus pin ntawm solid-state relay raug ntsuas kom tsis txhob muaj qhov kawg, nws txhais tau hais tias lub zog-lub xeev relay tau raug puas tsuaj los ntawm qhov qhib Circuit Court.
