Standard Test Methods rau Switching Fais Fab Transformers
1. Txheeb xyuas qhov txawv txav uas pom tseeb los ntawm kev soj ntsuam qhov pom ntawm lub tshuab hloov pauv. Txawm hais tias cov coil leads puas lawm, desoldered, seb puas muaj cov cim hlawv ntawm cov khoom siv rwb thaiv tsev, seb cov hlau tseem ceeb fastening screws yog xoob, seb cov nplooj ntawv silicon steel puas corroded, seb lub winding coils raug, thiab lwm yam.
2. Kev ntsuas rwb thaiv tsev. Ntsuas qhov ntsuas qhov tseem ceeb ntawm cov tub ntxhais hlau thiab lub hauv paus, nruab nrab ntawm lub hauv paus thiab txhua theem nrab, nruab nrab ntawm cov tub ntxhais hlau thiab txhua theem nrab, nruab nrab ntawm cov txheej txheem electrostatic shielding thiab cov winding thib ob, thiab nruab nrab ntawm txhua qhov winding ntawm theem nrab siv multimeter R × 10k. Lub multimeter pointer yuav tsum taw tes rau infinity thiab nyob ruaj ruaj. Txwv tsis pub, nws qhia txog kev rwb thaiv tsev ntawm lub transformer.
3. Kev kuaj xyuas cov coil txuas ntxiv. Muab lub multimeter tso rau hauv R × 1 txoj haujlwm. Thaum lub sij hawm kuaj, yog hais tias tus nqi kuj ntawm ib tug winding yog infinite, nws qhia tau hais tias lub winding muaj ib tug qhib Circuit Court txhaum.
4. Paub qhov txawv ntawm cov coils thawj thiab theem nrab. Thawj thiab thib ob pins ntawm lub hwj chim transformer feem ntau yog coj tawm ntawm ob sab, thiab thawj winding feem ntau sau lo lus 220V, thaum lub thib ob winding yog sau nrog tus nqi voltage, xws li 15V, 24V, 35V, thiab lwm yam. Ntxiv txheeb xyuas raws li cov cim no
5. Kev kuaj xyuas tsis muaj -load tam sim no.
a, Direct ntsuas txoj kev. Qhib tag nrho cov windings theem nrab, teeb lub multimeter rau AC tam sim no hom (500mA), thiab txuas nws hauv series nrog thawj winding. Thaum lub ntsaws ntawm thawj winding yog muab tso rau hauv 220V AC mains, lub multimeter qhia tias tsis muaj -load tam sim no tus nqi. Tus nqi no yuav tsum tsis pub tshaj 10% mus rau 20% ntawm lub transformer puv load tam sim no. Qhov ib txwm tsis muaj-load tam sim no ntawm lub zog hloov hluav taws xob rau cov khoom siv hluav taws xob yuav tsum nyob ib puag ncig 100mA. Yog tias nws dhau ntau dhau lawm, nws qhia tau tias lub tshuab hloov pauv muaj qhov luv luv - Circuit Court txhaum.
b, Indirect ntsuas txoj kev. Txuas lub 10 / 5W resistor nyob rau hauv cov thawj winding ntawm lub transformer, thaum lub thib ob tseem unloaded tag. Teem lub multimeter rau AC voltage hom. Tom qab lub hwj chim rau, siv ob qhov kev sojntsuam los ntsuas qhov voltage poob U hla cov resistor R, thiab tom qab ntawd siv Ohm txoj cai los xam qhov tsis muaj -load tam sim no I, uas yog I=U / RF Kev Tshawb Nrhiav tsis muaj-load voltage. Txuas lub hauv paus ntawm lub zog hloov hluav taws xob rau 220V lub zog hluav taws xob, thiab siv lub tshuab hluav taws xob los ntsuas qhov tsis muaj -load voltage qhov tseem ceeb (U21, U22, U23, U24) ntawm txhua qhov sib txuas. Qhov kev tso cai yuam kev yog feem ntau: high voltage winding Tsawg dua los yog sib npaug rau ± 10%, tsis tshua muaj hluav taws xob winding Tsawg dua los yog sib npaug rau ± 5%, thiab qhov sib txawv ntawm qhov sib txawv ntawm ob qhov sib xyaw windings nrog nruab nrab kais yuav tsum tsawg dua lossis sib npaug ± 2%.
6. Feem ntau, qis- fais fab fais fab transformers tso cai rau qhov kub ntawm 40℃mus rau 50℃. Yog tias cov khoom siv rwb thaiv tsev siv yog qhov zoo, qhov tso cai kom sov tuaj yeem nce ntxiv.
7. Tshawb xyuas thiab paub qhov txawv ntawm tib lub npe terminals ntawm txhua qhov winding. Thaum siv lub tshuab hluav taws xob hloov hluav taws xob, qee zaum ob lossis ntau lub voj voog thib ob tuaj yeem txuas nrog hauv series kom tau txais qhov xav tau theem nrab voltage. Thaum siv lub hwj chim transformer nyob rau hauv series, tib lub npe terminals ntawm txhua winding koom nyob rau hauv lub series kev twb kev txuas yuav tsum tau kev cob cog rua kom raug thiab tsis tuaj yeem yuam kev. Txwv tsis pub, lub transformer yuav tsis ua haujlwm zoo.
