Txoj kev tshawb nrhiav qhov zoo ntawm kev hloov hluav taws xob hloov hluav taws xob hloov pauv - kev tshawb pom ntawm tsis muaj kev thauj khoom tam sim no.
a, kev ntsuas ncaj qha. Qhib tag nrho cov windings theem nrab, muab lub multimeter nyob rau hauv lub AC tam sim no thaiv (500mA, thiab txuas thawj winding nyob rau hauv series. Thaum lub plug ntawm thawj winding yog muab tso rau hauv lub 220V AC mains, lub multimeter qhia tsis muaj load tam sim no tus nqi. tus nqi yuav tsum tsis txhob ntau tshaj 10 feem pua mus rau 20 feem pua ntawm tag nrho cov load tam sim no ntawm transformer.
Feem ntau, lub cev tsis muaj zog tam sim no ntawm lub zog hloov hluav taws xob ntawm cov khoom siv hluav taws xob yuav tsum yog li 100mA. Yog tias nws dhau ntau dhau, lub transformer muaj qhov ua txhaum luv luv.
b, indirect ntsuas txoj kev. Ib qho 10? / 5W resistor txuas nrog hauv cov koob nrog thawj winding ntawm lub transformer, thiab theem nrab yog tseem unloaded tag nrho. Teem lub multimeter rau AC voltage.
Tom qab siv hluav taws xob, siv ob lub ntsuas ntsuas ntsuas qhov ntsuas hluav taws xob poob U hla cov resistor R, thiab tom qab ntawd siv Ohm txoj cai los xam qhov tsis muaj qhov tam sim no kuv khoob, uas yog, kuv khoob=U / R. F? Kev kuaj xyuas qhov tsis muaj hluav taws xob. Txuas lub hauv paus ntawm lub hwj chim transformer mus rau 220V coj mus muag fais fab, thiab siv ib tug multimeter los mus txuas rau AC voltage los ntsuas qhov tsis muaj load voltage tus nqi ntawm txhua winding (U21, U22, U23, U24) nyob rau hauv lem, uas yuav tsum tau raws li qhov yuav tsum tau tus nqi. . Qhov kev tso cai yuam kev yog feem ntau: high-voltage winding Tsawg dua los yog sib npaug rau ± 10 feem pua, qhov qis-voltage winding tsawg dua los yog sib npaug rau ± 5 feem pua, thiab qhov sib txawv ntawm qhov sib txawv ntawm ob pawg ntawm symmetrical windings nrog rau nruab nrab kais dej yuav tsum Tsawg dua lossis sib npaug li ± 2 feem pua.
