Demagnetization Inspection Ntawm Tam Sim No Transformers

Nyob rau hauv cov ntaub ntawv ntawm ib tug tam sim no txo ​​nyob rau hauv tam sim no, cov hlau core ntawm ib tug tam sim no transformer yuav tsim residual magnetism. Yog hais tias tam sim no transformer dheev txiav tawm lub hwj chim mov nyob rau hauv siab tam sim no tej yam kev mob, los yog yog hais tias lub thib ob winding dheev qhib. Cov tub ntxhais hlau ntawm lub transformer muaj cov hlau nplaum seem, uas txo cov hlau nplaum permeability ntawm cov tub ntxhais hlau thiab cuam tshuam rau kev ua haujlwm ntawm lub transformer. Transformers uas tau siv ntev ntev yuav tsum tau demagnetized. Lub transformer kuj yuav tsum tau demagnetized ua ntej tshuaj xyuas. Demagnetization yog tus txheej txheem ntawm kev siv ib qho chaw sib nqus sib nqus rau cov tub ntxhais hlau los ntawm lub ntsiab lus los yog theem nrab winding nrog ib qho alternating excitation tam sim no. Pib los ntawm 0, maj mam nce qhov chaw sib nqus sib nqus (excitation tam sim no) kom saturate cov tub ntxhais hlau, thiab maj mam txo qhov excitation tam sim no mus rau xoom kom tshem tawm cov hlau nplaum seem.
Rau demagnetization ntawm tam sim no transformers, thawj winding yog qhib thiab lub thib ob winding yog nkag nrog lub hwj chim zaus tam sim no, maj mam nce los ntawm xoom mus rau ib tug tej yam tam sim no tus nqi (qhov no tam sim no tus nqi yog hais txog tus tsim ntsuas lub siab txwv ntawm transformer, feem ntau nyob ib ncig ntawm { {0}}% ntawm qhov ntsuas tam sim no Nws tuaj yeem txiav txim siab tias yog qhov tam sim no nce siab, nws qhia tau tias cov tub ntxhais hlau tau nkag mus rau theem sib nqus saturation). Tom qab ntawd maj mam txo qhov tam sim no mus rau xoom thiab rov ua cov txheej txheem no 2-3 zaug. Ua ntej disconnecting lub hwj chim mov, thawj winding yuav tsum luv luv circuited ua ntej disconnecting lub hwj chim mov. Lub demagnetization ntawm cov tub ntxhais hlau yog ua tiav. Txoj kev no hu ua qhib Circuit Court demagnetization method. Rau qee qhov tam sim no transformers, vim muaj coob tus lem nyob rau hauv lub thib ob winding. Yog tias siv txoj kev qhib Circuit Court demagnetization, qhov qhib Circuit Court winding yuav ua kom muaj hluav taws xob siab. Yog li ntawd, ib tug loj dua resistor (10-20 lub sij hawm lub rated impedance) tuaj yeem txuas mus rau qhov thib ob winding. Siv tam sim no rau thawj winding, maj mam nce los ntawm xoom mus rau qhov siab tshaj plaws tam sim no ntawm lub transformer thawj winding, thiab maj mam nce mus rau xoom. Rov ua qhov txheej txheem no 2-3 zaug. Vim muaj cov khoom thauj, cov tub ntxhais hlau tsis tuaj yeem demagnetized tag nrho. Vim lub siab tshaj plaws tam sim no txwv ntawm thawj winding, yog tias nws siab dhau lawm, nws yuav hlawv tawm thawj winding. Yog hais tias qhov hluav taws xob tsim los ntawm qhov thib ob winding nrog lub load tsis siab dhau lawm, qhov kev ua haujlwm ntawm qhov nruab nrab winding tuaj yeem nce ntxiv. Qhov no tuaj yeem txhim kho cov nyhuv demagnetization.