Cov txheej txheem los txheeb xyuas cov kev ua haujlwm ntawm cov tsav tsheb sib txawv (VFDs) Siv Multimeter
Rau kev nyab xeeb ntawm tus kheej, nws yog ib qho tsim nyog los xyuas kom meej tias lub tshuab raug kaw, thiab cov kab nkag R, S, T thiab cov kab tawm U, V, W yuav tsum raug tshem tawm ua ntej ua haujlwm! Ua ntej, teem nws mus rau theem "kev tswj hwm theem nrab", thiab tom qab ntawd siv cov kev sojntsuam liab thiab dub ntawm multimeter los xyuas raws li cov kauj ruam hauv qab no:
1, Kev sojntsuam dub hu rau tus ncej tsis zoo P (+) ntawm lub tsheb npav DC, thiab kev sojntsuam liab hu rau R, S, thiab T nyob rau hauv ib ntus, sau cov nqi tso rau ntawm multimeter; Tom qab ntawd kov lub xov tooj liab mus rau N (-), thiab kov qhov kev sojntsuam dub rau R, S, thiab T nyob rau hauv ib ntus, sau cov nqi zaub 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 lub rectifier lossis soft start resistor ntawm zaus converter. Txwv tsis pub, yog hais tias lub rectifier module los yog mos pib resistor ntawm qhov sib thooj txoj hauj lwm puas, qhov tshwm sim yog: tsis muaj zaub.
2, Kev sojntsuam liab hu rau tus ncej tsis zoo P (+) ntawm lub tsheb npav DC, thiab qhov kev sojntsuam dub hu U, V, thiab W hauv ib ntus, sau cov nqi tso tawm ntawm lub multimeter; Tom qab ntawd kov qhov kev sojntsuam dub rau N (-) thiab tshuaj ntsuam liab rau U, V, thiab W hauv ib ntus, thiab sau tus nqi zaub 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, yog hais tias lub IGBT inverter module ntawm qhov sib thooj txoj hauj lwm raug puas, qhov tshwm sim yog: tsis muaj cov zis los yog ib qho txhaum cai.
1. Siv lub tshuab hloov zaus los tsav lub tshuab asynchronous nrog lub zog sib txuam ntawm qhov chaw kom tsis muaj- kev ua haujlwm thauj khoom, kho qhov zaus f, thiab pib txo qis ntawm 50Hz mus txog rau qhov qis tshaj plaws;
2. Thaum lub sijhawm ua haujlwm no, siv lub ammeter los kuaj xyuas qhov tsis muaj -load tam sim no ntawm lub cev muaj zog. Yog tias tsis muaj -load tam sim no tseem nyob ruaj khov thaum lub sijhawm txo qis thiab tuaj yeem nyob twj ywm tsis hloov pauv, ces nws yog qhov zoo zaus hloov pauv;
3. Qhov tsawg zaus tuaj yeem suav tau raws li hauv qab no: (synchronous ceev - rated ceev) x ncej khub p ÷ 60. Piv txwv li, 4-ncej lub cev muaj zog nrog qhov ntsuas ceev ntawm 1470 revolutions ib feeb thiab tsawg zaus ntawm (1500-1470) × 2} ÷ {{7} Hz;
a. Kev ntxub ntxaug ntawm AC thiab DC lub xeev muaj zog: Feem ntau, muaj cov cim ntawm ib sab ntawm cov tswv yim thiab cov khoom tawm ntawm DC cov khoom hauv lub xeev relay vaj tsev.
Cov cim "+" thiab "-" yog cim nrog cov lus "Dc input" thiab "DC output". Txawm li cas los xij, kev sib txuas lus ruaj khov- xeev relays tsuas tuaj yeem raug cim nrog "+" thiab "-" cov cim ntawm cov tswv yim kawg, thiab tsis muaj qhov sib txawv ntawm qhov zoo thiab qhov tsis zoo ntawm cov zis kawg.
b. Kev ntxub ntxaug ntawm cov tswv yim thiab cov khoom siv tawm: Rau cov khoom tsis muaj cim - xeev relays, R × 10k ntau ntawm multimeter 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 tiv thaiv 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 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 qhov tsis zoo ntawm lub davhlau ya nyob twg.
Yog tias qhov kev tawm tsam rau pem hauv ntej thiab rov qab ntawm ob tus pins yog ob qho xoom, nws qhia tau tias cov khoom - 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 cov khoom - xeev relay raug ntsuas kom tsis muaj qhov kawg, nws qhia tau tias cov khoom - xeev relay tau qhib thiab puas lawm.
