Yuav ua li cas siv ib tug multimeter los ntsuas qhov zoo ntawm ib zaus converter
Nyob rau hauv cov txheej txheem tsim hluav taws xob circuits, engineers inevitably xav tau ib tug multimeter 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 tswj cov cuab yeej ntawm AC lub cev muaj zog los ntawm kev hloov kho lub zog ua haujlwm zaus ntawm lub cev muaj zog. Kab lus no yuav piav qhia yuav ua li cas siv lub multimeter los ntsuas qhov zoo ntawm lub tshuab hloov zaus.
Nws yuav tsum raug sau tseg tias rau kev nyab xeeb ntawm tus kheej, lub tshuab yuav tsum raug kaw thiab cov kab hluav taws xob nkag R, S, T thiab cov kab tawm U, V, W ntawm lub zaus hloov pauv yuav tsum raug tshem tawm ua ntej ua haujlwm! Ua ntej, teeb lub multimeter mus rau qhov "secondary tube" txoj hauj lwm, thiab tom qab ntawd siv cov kev sojntsuam liab thiab dub ntawm multimeter los xyuas raws li cov kauj ruam hauv qab no:
Qhov kev sojntsuam dub hu rau tus ncej tsis zoo P (+) ntawm lub tsheb npav DC, thaum lub xov tooj liab tiv tauj R, S, thiab T ua ntu zus. Sau tus nqi tso tawm ntawm lub multimeter. Tom qab ntawd kov lub xov tooj liab nrog N (-) thiab qhov kev sojntsuam dub nrog R, S, thiab T ua ntu zus, thiab sau tus nqi tso tawm ntawm multimeter. Yog hais tias rau qhov tso tawm qhov tseem ceeb yog qhov sib npaug, nws qhia tau hais tias tsis muaj teeb meem nrog lub rectifier module lossis soft start resistor ntawm inverter diode. Conversely, yog hais tias tus rectifier module los yog mos pib resistor ntawm lub coj txoj hauj lwm yog puas, qhov tshwm sim yog: tsis muaj zaub.
Qhov kev sojntsuam liab hu rau tus ncej tsis zoo P (+) ntawm DC lub npav, thaum qhov kev sojntsuam dub hu U, V, thiab W ua ntu zus. Sau tus nqi tso tawm ntawm lub multimeter. Tom qab ntawd kov cov kev sojntsuam dub nrog N (-) thiab cov tshuaj ntsuam liab nrog U, V, thiab W ua ntu zus, thiab 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. Hloov pauv, yog tias IGBT inverter module ntawm qhov chaw sib raug raug puas ntsoog, qhov tshwm sim yog: tsis muaj qhov tso tawm lossis qhov txhaum.
Luag lub zog sib tw asynchronous lub cev muaj zog ntawm qhov chaw nrog lub zaus hloov pauv kom ua haujlwm yam tsis muaj kev thauj khoom, kho qhov zaus f, thiab pib txo qis ntawm 50Hz mus txog 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 tseem nyob ruaj khov thiab tsis hloov pauv thaum lub sijhawm txo cov txheej txheem, ces nws yog ib qho zoo zaus converter.
Qhov tsawg kawg nkaus zaus tuaj yeem suav tau raws li hauv qab no: (synchronous speed rated speed) x tus naj npawb ntawm ncej p ÷ 60. Piv txwv li, ib tug 4- ncej lub cev muaj zog nrog tus ntsuas ceev ntawm 1470 rpm thiab qhov tsawg zaus ntawm ({{3} }}) x 2 ÷ 60=1Hz.
Tsis muaj teeb meem nrog lub soft start resistor. Conversely, yog hais tias tus rectifier module los yog mos pib resistor ntawm qhov chaw sib raug zoo, tsis muaj zaub.
Qhov kev sojntsuam liab hu rau tus ncej tsis zoo P (+) ntawm DC lub npav, thaum qhov kev sojntsuam dub hu U, V, thiab W ua ntu zus. Sau tus nqi tso tawm ntawm lub multimeter. Tom qab ntawd kov cov kev sojntsuam dub nrog N (-) thiab cov tshuaj ntsuam liab nrog U, V, thiab W ua ntu zus, thiab 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. Hloov pauv, yog tias IGBT inverter module ntawm qhov chaw sib raug raug puas ntsoog, qhov tshwm sim yog: tsis muaj qhov tso tawm lossis qhov txhaum.
Luag lub zog sib tw asynchronous lub cev muaj zog ntawm qhov chaw nrog lub zaus hloov pauv kom ua haujlwm yam tsis muaj kev thauj khoom, kho qhov zaus f, thiab pib txo qis ntawm 50Hz mus txog 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 tseem nyob ruaj khov thiab tsis hloov pauv thaum lub sijhawm txo cov txheej txheem, ces nws yog ib qho zoo zaus converter.
Qhov tsawg kawg nkaus zaus tuaj yeem suav tau raws li hauv qab no: (synchronous speed rated speed) x tus naj npawb ntawm ncej p ÷ 60. Piv txwv li, ib tug 4- ncej lub cev muaj zog nrog tus ntsuas ceev ntawm 1470 rpm thiab qhov tsawg zaus ntawm ({{3} }}) x 2 ÷ 60=1Hz.
Qhov txawv ntawm AC thiab DC solid-state relays: Feem ntau, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob ntawm DC solid-state relay vaj tsev raug cim nrog "+" thiab "-" cov cim, thiab cov lus "Dc input" thiab "DC output" yog. qhia. Txawm li cas los xij, AC solid-state relays tsuas tuaj yeem qhia "+" thiab "-" cov cim ntawm qhov kev nkag siab kawg, thiab tsis muaj qhov sib txawv ntawm qhov zoo thiab qhov tsis zoo ntawm qhov kawg tso zis.
Kev ntxub ntxaug ntawm cov tswv yim thiab cov khoom tso tawm: Ib qho kev tsis sib haum xeeb ntawm lub xeev relay nrog ib qho multimeter hauv R × 10k ntau yog siv los txiav txim siab qhov sib txawv ntawm cov tswv yim thiab cov zis tawm los ntawm kev ntsuas tus nqi pem hauv ntej thiab thim rov qab ntawm txhua tus pin cais. Thaum qhov kev tawm tsam rau pem hauv ntej ntawm ib qho ob tus pins me me thiab qhov rov qab ua haujlwm tsis muaj qhov kawg, ob tus pins no yog cov tswv yim terminals, thiab ob tus pins yog cov zis terminals. Hauv kev ntsuas nrog tus nqi qis dua, qhov kev sojntsuam dub txuas nrog lub davhlau ya nyob twg zoo thiab qhov kev sojntsuam liab txuas nrog lub davhlau ya nyob twg tsis zoo.
Yog hais tias lub pem hauv ntej thiab rov qab tsis kam ntawm ib tug tej yam ob pins yog ob qho tib si 0, nws qhia tau hais tias lub solid-state relay tau tawg thiab puas. 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 qhia tau hais tias lub zog-state relay tau qhib thiab puas lawm.
