Yuav ua li cas siv ib tug multimeter los ntsuas lub inverter zoo los yog phem
Raws li peb txhua tus paub, zaus converters muaj ntau yam kev tiv thaiv, xws li overcurrent, overvoltage, overload tiv thaiv thiab hais txog. Nrog kev nce qib ntawm kev lag luam automation, inverters tau siv dav heev.
Nyob rau hauv cov txheej txheem tsim hluav taws xob circuits, engineers inevitably xav tau ib tug multimeter los ntsuas ib co ntsuas ntsuas. Engineers paub tias lub multimeter tuaj yeem ntsuas DC tam sim no, AC voltage, DC voltage. Inverter, ntawm qhov tod tes, yog ib qho khoom siv uas tswj cov AC lub cev muaj zog los ntawm kev hloov kho zaus ntawm lub cev muaj zog ua haujlwm ntawm lub zog. Hauv tsab xov xwm no, peb yuav piav qhia 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, koj yuav tsum xyuas kom meej tias lub tshuab yog powered tawm thiab tshem tawm cov inverter input fais fab kab R, S, T thiab tso zis kab U, V, W ua ntej ua hauj lwm! Ua ntej tshaj plaws, lub multimeter mus rau cov ntaub ntawv "secondary tube", thiab tom qab ntawd los ntawm multimeter tus cwj mem liab thiab dub cwj mem raws li cov kauj ruam hauv qab no txhawm rau txheeb xyuas:
Tus cwj mem dub hu rau tus ncej tsis zoo ntawm DC tsheb npav P (+), tus cwj mem liab hu R, S, T nyob rau hauv lem, sau tus nqi zaub ntawm lub multimeter. Ces tus cwj mem liab hu N (-), tus cwj mem dub hu R, S, T nyob rau hauv lem, sau tus nqi zaub ntawm lub multimeter. Yog hais tias lub rau cov zaub qhov tseem ceeb yog qhov sib npaug, nws qhia tau hais tias tsis muaj teeb meem nrog lub inverter diode rectifier lossis soft-start resistor, ntawm qhov tsis sib xws, qhov sib thooj ntawm lub rectifier module lossis soft-start resistor puas, tshwm sim: tsis muaj zaub .
Tus cwj mem liab hu rau tus ncej tsis zoo ntawm DC tsheb npav P (+), tus cwj mem dub hu U, V, W hauv lem, sau tus nqi zaub ntawm lub multimeter. Tom qab ntawd kov tus cwj mem dub rau N (-), thiab tus cwj mem liab rau U, V, W hauv lem, thiab sau tus nqi tso rau ntawm multimeter. Yog hais tias lub rau lub tso saib qhov tseem ceeb yog qhov sib npaug, nws qhia tau hais tias qhov zaus hloov pauv IGBT inverter module tsis yog qhov teeb meem, ntawm qhov tsis sib xws, qhov sib thooj ntawm IGBT inverter module raug puas ntsoog, qhov tshwm sim: tsis muaj qhov tso tawm lossis tshaj tawm qhov txhaum.
Luag lub zog sib tw asynchronous lub cev muaj zog nrog lub inverter ntawm qhov chaw tsis muaj kev ua haujlwm, kho qhov zaus f, pib ntawm 50Hz mus rau qhov qis tshaj plaws.
Nyob rau hauv cov txheej txheem no nrog ib tug ammeter los ntes lub cev muaj zog tsis muaj-load tam sim no, yog hais tias tsis muaj-load tam sim no nyob rau hauv lub zaus poob txheej txheem yog heev du, muaj peev xwm nyob twj ywm tsis hloov, uas yog ib tug zoo inverter.
Qhov tsawg kawg nkaus zaus tuaj yeem suav tau zoo li no, (synchronous speed - rated speed) × ncej khub tooj p ÷ 60. Piv txwv li, ib tug 4-ncej lub cev muaj zog, ntsuas ceev yog 1470 rpm, qhov tsawg zaus=(1500-1470) × 2 ÷ 60=1Hz.
Tsis muaj teeb meem nrog soft start resistor, ntawm qhov tsis sib xws, qhov sib thooj ntawm lub rectifier module lossis soft start resistor puas, tshwm sim: tsis muaj zaub.
Tus cwj mem liab hu rau tus ncej tsis zoo P(+) ntawm lub tsheb npav DC, tus cwj mem dub hu U, V, W hauv lem, thiab sau cov nqi tso rau ntawm multimeter. Tom qab ntawd kov tus cwj mem dub rau N (-), thiab tus cwj mem liab rau U, V, W hauv lem, thiab sau tus nqi tso rau ntawm multimeter. Yog hais tias lub rau lub tso saib qhov tseem ceeb yog qhov sib npaug, nws qhia tau hais tias qhov zaus hloov pauv IGBT inverter module tsis yog qhov teeb meem, ntawm qhov tsis sib xws, qhov sib thooj ntawm IGBT inverter module raug puas ntsoog, qhov tshwm sim: tsis muaj qhov tso tawm lossis tshaj tawm qhov txhaum.
Luag lub zog sib tw asynchronous lub cev muaj zog nrog lub inverter ntawm qhov chaw tsis muaj kev ua haujlwm, kho qhov zaus f, pib ntawm 50Hz mus rau qhov qis tshaj plaws.
Nyob rau hauv cov txheej txheem no nrog ib tug ammeter los ntes lub cev muaj zog tsis muaj-load tam sim no, yog hais tias tsis muaj-load tam sim no nyob rau hauv lub zaus poob txheej txheem yog heev du, muaj peev xwm nyob twj ywm tsis hloov, uas yog ib tug zoo inverter.
Qhov tsawg kawg nkaus zaus tuaj yeem suav tau zoo li no, (synchronous speed - rated speed) × ncej khub tooj p ÷ 60. Piv txwv li, ib tug 4-ncej lub cev muaj zog, ntsuas ceev yog 1470 rpm, qhov tsawg zaus=(1500-1470) × 2 ÷ 60=1Hz.
AC thiab DC khoom lub xeev relay kev ntxub ntxaug: feem ntau, nyob rau hauv lub DC khoom lub xeev relay plhaub ntawm lub input thiab output terminals, cim "+", "-" cim, thiab cim nrog "Dc input", "DC output", " Dc input", "DC output", "dc input", "DC output", "dc output", "dc input", "dc output", "DC output", "dc input", "DC output", "dc tso zis", DC tso zis". Dc input" thiab "DC output" AC lub xeev relays tsuas yog cim rau ntawm lub tswv yim sab ntawm lub cim "+", "-", cov zis sab tsis zoo, tsis zoo.
Kev ntxub ntxaug tawm tswv yim thiab tso tawm: tsis muaj kev txheeb xyuas cov khoom hauv lub xeev relays, multimeter R × 10k cov ntaub ntawv, los ntawm kev ntsuas qhov zoo thiab qhov tsis zoo ntawm txhua tus pin kom cais tawm ntawm cov tswv yim thiab cov zis. Thaum ntsuas ib tug ob-pin rau pem hauv ntej kuj yog me me, thiab rov qab kuj yog infinite, ob tus pins uas yog input, qhov seem ob txhais taw rau cov zis. Hauv kev ntsuas me me, tus cwj mem dub txuas nrog cov tswv yim zoo, tus cwj mem liab txuas nrog qhov tsis zoo cov tswv yim.
Yog tias qhov ntsuas qhov zoo thiab rov qab ua haujlwm ntawm ob tus pins yog 0, nws txhais tau tias cov khoom hauv lub xeev tau raug puas tsuaj los ntawm kev tawg. Yog hais tias qhov ntsuas qhov zoo thiab rov qab qhov tseem ceeb ntawm txhua tus pin ntawm cov khoom hauv lub xeev relay yog infinity, nws txhais tau hais tias cov khoom hauv lub xeev relay tau raug puas los ntawm qhib Circuit Court.
