Lub luv luv-circuit impedance ntawm lubtransformertseem hu ua impedance voltage. Nws tau txhais nyob rau hauv lub transformer kev lag luam raws li nram no: Thaum lub thib ob winding ntawm ib tug transformer yog luv luv-circuited (lub xeev khov kho), qhov voltage thov thaum thawj winding ntws los ntawm cov rated tam sim no hu ua impedance voltage Uz. Feem ntau qhia raws li feem pua ntawm qhov ntsuas hluav taws xob, uas yog, uz=(Uz/U1e) × 100%. Thaum lub transformer khiav ntawm tag nrho cov load, theem ntawm lub short-circuit impedance muaj ib tug tej yam kev cuam tshuam nyob rau hauv lub theem ntawm ob sab tso zis voltage. Me me luv-circuit impedance txhais tau tias tsawg voltage poob; loj luv luv-circuit impedance txhais tau tias ntau voltage poob. Thaum lub luv luv-circuit impedance yog xoom, lub transformer yog sib npaug rau muab tso rau hauv lub lag luam nrog load. Qhov no tsuas yog ua tau thaum lub kaw lus tshwj xeeb me me thiab qhov luv-circuit impedance kuj loj. Rau cov transformers sib faib, nws yog qhov tsim nyog rau qhov luv luv-circuit impedance nyob rau hauv qhov ntsuas voltage transformation ratio ntawm 5%-10%.
Yog tias qhov luv-circuit impedance ntawm transformer raug xaiv me me, thaum lub kaw lus luv luv, qhov luv-circuit tam sim no yuav loj, thiab cov cuab yeej tiv thaiv yuav ua haujlwm vim tias nws tshaj nws qhov ntsuas qhov nqi, txiav tawm lub transformer. , ua rau nws nyuaj rau rov qab muab cov khoom siv hluav taws xob rau lub network faib. Yog li ntawd, nws yog ib qho tseem ceeb heev uas yuav tau xaiv qhov tsim nyog luv luv-circuit impedance ntawm lub transformer kom nws tsis tsuas yog txo qhov luv luv tam sim no tab sis kuj ua tau raws li tus neeg siv cov kev xav tau rau lub hwj chim mov zoo.
Lub ntsiab lus ntawm impedance voltage
Transformers, Kuv ntseeg tias ntau ntawm kuv cov phooj ywg paub txog lawv. Muaj ib qho parameter ntawm lub transformer nameplate hu ua "impedance voltage", uas feem ntau yog ib feem ntawm 5-10. Kuv xav tias sawv daws tau pom lawm. Lub transformer hauv qab no tseem hu ua "luv-circuit impedance". Tam sim no tus qauv lub npe tseem yog luv luv-circuit impedance, tab sis kuv tseem nyiam hu nws impedance voltage.
Impedance voltage yog ib qho kev hloov pauv uas qhia tias feem pua. Nws luv luv-circuits thib ob winding ntawm lub transformer, ua rau lub voltage ntawm thawj winding maj mam nce. Thaum lub caij luv-circuit tam sim no ntawm qhov thib ob winding mus txog qhov ntsuas tam sim no, qhov hluav taws xob siv rau thawj winding ( luv luv Circuit Court voltage) rau qhov ntsuas hluav taws xob. Qhia ua tus qauv:
Uk%=short circuit voltage/rated voltage*100%.
Qhov no yog ib qho yooj yim sib npaug Circuit Court ntawm lub transformer. Rs yog qhov tsis kam nyob rau hauv lub transformer, Xs yog lub reactance hauv lub transformer, thiab Zs yog siv nyob rau hauv daim duab los sawv cev rau impedance ntawm tag nrho cov transformer. Z\\\\'L yog qhov sib npaug impedance hloov los ntawm load sab impedance mus rau thawj sab.
Raws li lub ntsiab lus ntawm impedance voltage, luv luv-circuit thib ob winding, uas yog, Z\\\\'L yog sib npaug rau 0, thiab ces maj mam pressurize thawj winding kom txog rau thaum tam sim no nyob rau hauv lub thib ob sab yog sib npaug. mus rau qhov voltage thaum tam sim no nyob rau theem nrab ntawm lub transformer yog ntsuas. tus nqi yog qhov luv-circuit voltage tus nqi peb xav tau. Tom qab ntawd nws yog qhov yooj yim kom paub qhov impedance voltage tus nqi raws li kev suav yav dhau los.
