Txoj Kev Yooj Yim rau Kev Ntsuas Inverters nrog Multimeter
Lub tshuab hloov zaus yog ib qho khoom siv uas hloov cov kev khiav hauj lwm zaus ntawm lub cev muaj zog los tswj kev sib txuas lus. Nrog rau qhov nrov ntawm industrialization, zaus converters tau nce siv nyob rau hauv niaj hnub teb. Kab lus no yuav qhia txog yuav ua li cas siv nws los ntsuas qhov zoo ntawm qhov hloov pauv 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 lub 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.
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 cov kev sojntsuam dub rau N (-) thiab cov 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 rau kev ua haujlwm tsis muaj kev thauj khoom, kho qhov zaus f 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 tsis muaj-load tam sim no tseem nyob ruaj khov thaum lub sij hawm tsawg zaus thiab tuaj yeem nyob twj ywm tsis hloov, 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 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 khoom siv hluav taws xob thiab cov khoom siv hluav taws xob ntawm DC solid-state relay vaj tsev yog cim nrog "+" thiab "-" cov cim, thiab sau nrog cov lus "Dc input" thiab "DC output". Txawm li cas los xij, kev sib txuas lus solid-state relays tsuas yog 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 tso tawm: Rau cov khoom tsis muaj npe-lub xeev relays, R × 10k ntau ntawm multimeter yog siv los ntsuas 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 ob tus pins me me thiab qhov rov qab ua haujlwm tsis muaj qhov kawg, ob tus pins no yog cov khoom siv hluav taws xob, thiab ob tus pins yog qhov tso 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 ob qho tib si xoom, nws qhia tau hais tias lub zog-lub xeev 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 muaj qhov kawg, nws qhia tau hais tias lub solid-state relay tau qhib thiab puas lawm.
Ib tug raug rectifier choj muaj rau diodes (peb-theem tag nrho choj, unidirectional tag nrho choj), nrog rau tus yam ntxwv ntawm kev coj nyob rau hauv pem hauv ntej kev taw qhia thiab thaiv nyob rau hauv lub rov qab kev taw qhia. Qhov sib xws ntawm kev tiv thaiv rau pem hauv ntej thiab thim rov qab ntawm plaub lub diodes yuav tsum tau khaws cia thaum kuaj.
Qhov ntau ntawm cov inverter module yog loj dua, muaj xws li ob lub hauv paus transistor array thiab lwm yam khoom (txhua hom inverter siv cov tsav tsheb sib txawv), thiab qhov kev kuaj xyuas kuj tseem los xyuas qhov sib xws ntawm peb theem zoo thiab tsis zoo.
