Cov txheej txheem thiab cov txheej txheem kev khiav hauj lwm rau kev kuaj xyuas qhov xwm txheej ntawm lub tshuab hluav taws xob zaus nrog Multimeter
Raws li paub zoo, muaj ntau yam kev tiv thaiv, xws li overcurrent, overvoltage, overload tiv thaiv, thiab lwm yam. Nrog rau kev txhim kho txuas ntxiv ntawm kev lag luam automation, zaus converters kuj tau siv dav.
Nyob rau hauv tus txheej txheem ntawm Circuit Court tsim, engineers inevitably yuav tsum tau ntsuas ib co ntsuas ntsuas. Cov kws kho tsheb paub tias lub tshuab hluav taws xob tuaj yeem ntsuas DC tam sim no, AC voltage, thiab DC voltage. Thiab lub zaus converter yog ib qho cuab yeej uas tswj AC los ntawm kev hloov kho qhov 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 "theem ob lub raj" txoj hauj lwm, thiab tom qab ntawd siv cov kev sojntsuam liab thiab dub ntawm multimeter los kuaj raws li cov kauj ruam hauv qab no:
Qhov 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 tawm ntawm lub 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 chaw sib raug zoo, qhov tshwm sim yog: tsis muaj zaub.
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 ua ntu zus, 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.
Siv lub tshuab hloov zaus los tsav lub tshuab asynchronous nrog lub zog sib txuam ntawm qhov chaw kom tsis muaj- thauj khoom, kho qhov zaus f ntawm 50Hz mus rau qhov qis tshaj plaws.
Thaum lub sijhawm ua haujlwm no, siv lub ntsuas ntsuas ntsuas ntsuas 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.
Qhov tsawg kawg nkaus 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 ÷ 60=1Hz.
Tsis muaj teeb meem nrog lub soft start resistor, txwv tsis pub lub rectifier module los yog soft start resistor ntawm tus coj txoj hauj lwm yog puas, thiab tsis muaj zaub.
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 ua ntu zus, 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.
Siv lub tshuab hloov zaus los tsav lub tshuab asynchronous nrog lub zog sib txuam ntawm qhov chaw kom tsis muaj- thauj khoom, kho qhov zaus f ntawm 50Hz mus rau qhov qis tshaj plaws.
Thaum lub sijhawm ua haujlwm no, siv lub ntsuas ntsuas ntsuas ntsuas 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.
Qhov tsawg kawg nkaus 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 ÷ 60=1Hz.
Kev txheeb xyuas ntawm AC thiab DC Solid State: Feem ntau, cov tswv yim thiab cov khoom tawm ntawm DC cov khoom siv - lub xeev relay vaj tse raug cim nrog "+" thiab "-" cov cim, thiab sau nrog cov lus "Dc input" thiab "DC output". Txawm li cas los xij, kev sib txuas lus ruaj khov- lub 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.
Kev ntxub ntxaug ntawm cov tswv yim thiab cov khoom siv tawm: Rau cov khoom tsis muaj cim - lub xeev relays, R × 10k ntau ntawm multimeter yog siv los ntsuas qhov sib txawv ntawm cov tswv yim thiab cov khoom tawm los ntawm kev ntsuas qhov ntsuas rau 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 hais tias lub pem hauv ntej thiab thim rov qab tsis kam ntawm ob tus pins yog xoom, nws qhia tau hais tias cov khoom - xeev relay tau tawg thiab puas lawm. Yog hais tias tus nqi pem hauv ntej thiab thim rov qab qhov tseem ceeb ntawm txhua tus pin ntawm cov khoom - xeev relay raug ntsuas kom tsis muaj qhov kawg, nws qhia tau hais tias cov khoom - xeev relay tau qhib thiab puas lawm.
