Cov txheej txheem sib txawv ntawm kev sib txuas lus tuaj yeem cuam tshuam rau qhov muaj peev xwm faib tawm ntawm cov xov hluav taws xob transformer, uas cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov transformers. Hauv tsab xov xwm no, peb yuav tsom mus rau qhov ntsuas ntawm cov transformers.
Lub peev xwm faib tawm ntawm lub transformer yog lub peev xwm parasitic tsim los ntawm qhov muaj qhov sib txawv ntawm cov peev xwm. Nws yog ib qho parameter hluav taws xob uas muaj ntau, qhov twg muaj peev xwm faib tawm ntawm ob lub insulators tsuav yog muaj qhov sib txawv ntawm voltage. Lub peev xwm faib tawm muaj qhov cuam tshuam me ntsis rau cov circuits ntawm cov zaus qis, tab sis nws cov teebmeem yuav tsum tau xav txog ntawm cov zaus siab.
Lub peev xwm faib tawm ntawm cov windings transformer tuaj yeem faib ua plaub qhov tseem ceeb:
(1) lub peev xwm ntawm qhov tig. Lub capacitor tsim los ntawm qhov sib txawv ntawm cov tig sib ze. Txawm hais tias tus nqi capacitance ntawm ib qho tig yog me me, kev them rov qab thiab tso tawm ntawm qhov tig tuaj yeem ua rau kev puas tsuaj ntawm cov rwb thaiv tsev thiab txawm tias tawg thiab luv luv ntawm cov hlau enameled hauv cov xwm txheej siab lossis muaj zog.
(2) Qhov muaj peev xwm ntawm cov txheej sib txawv. Qhov muaj peev xwm ntawm cov txheej sib txawv hauv tib lub winding. Qhov muaj peev xwm ntawm cov txheej sib txawv yog qhov tseem ceeb ntawm qhov muaj peev xwm faib tawm, uas tsim cov voj voog oscillation nrog cov inductance xau ntawm cov zaus siab, ua rau muaj teeb meem cuam tshuam electromagnetic thiab ua rau muaj kev ntxhov siab ntawm lub zog hloov pauv transistor.
3) Lub peev xwm sib txuas ntawm cov xov hlau thawj thiab thib ob, thawj thiab VCC, thiab cov xov hlau thib ob thiab VCC. Lub capacitor no muab txoj hauv kev sib txuas rau kev cuam tshuam hom sib xws, uas tuaj yeem ua rau suab nrov los ntawm sab thawj mus rau sab thib ob, cuam tshuam rau kev ruaj khov ntawm cov zis.
(4) Lub peev xwm tsis ruaj khov. Lub peev xwm ntawm cov xov hlau rau cov hlau nplaum, cov txheej tiv thaiv, lossis cov casings yog tshwm sim los ntawm cov yam xws li lub voj voog, cov qauv, lossis kev teeb tsa. Txawm hais tias cov capacitors no me me, lawv yuav muaj kev cuam tshuam rau cov yam ntxwv siab-zaus nyob rau hauv cov qauv tshwj xeeb.
Lub peev xwm faib tawm ntawm cov windings transformer feem ntau yog qhov txaus ntshai, thiab nws qhov cuam tshuam rau cov circuits yog raws li nram no:
1. Teeb meem sib xws ntawm electromagnetic. Distributed capacitance muab ib txoj kev sib txuas ntawm cov thawj thiab thib ob windings, ua rau muaj suab nrov ntawm sab thawj kom txuas rau sab thib ob los ntawm capacitance, tsim kev cuam tshuam hom sib xws thiab ua rau puas tsuaj rau lub teeb liab ntawm lub voj voog.
2. Kev ua haujlwm tsis zoo. Cov capacitors faib tawm hauv cov circuits tuaj yeem tsim cov capacitive currents, ua rau muaj kev nce ntxiv ntawm lub zog reactive ntawm transformers thiab txo qis hauv kev ua haujlwm tag nrho. Qhov thib ob, cov txheej txheem them thiab tso tawm ntawm cov capacitance faib tawm ua rau muaj kev poob ntxiv, winding cua sov nce ntxiv, thiab kev ua haujlwm txo qis.
3. Kev puas tsuaj ntawm cov khoom rwb thaiv tsev. Qhov muaj peev xwm faib tawm tuaj yeem ua rau muaj kev sib sau ua ke ntawm cov hluav taws xob hauv zos hauv cov xwm txheej muaj hluav taws xob ntau, ua rau muaj kev xau hluav taws xob ntau ntxiv thiab txawm tias cov khoom rwb thaiv tsev tawg.
4. Kev ruaj khov ntawm kev ua haujlwm tsis zoo. Qhov muaj peev xwm faib tawm thiab qhov xau hluav taws xob tsim ua lub voj voog resonant, ua rau muaj kev co ntawm lub zog hluav taws xob hauv lub zog hloov pauv, ua rau muaj kev ntxhov siab ntau dhau ntawm lub transistor hloov pauv thiab ua rau lub cuab yeej puas tsuaj.
Hauv cov ntawv thov uas muaj zaus ntau, qhov muaj peev xwm faib tawm tuaj yeem hloov pauv qhov sib npaug ntawm cov qauv hluav taws xob ntawm cov transformers, ua rau qhov teb zaus tsis zoo li tus nqi tsim thiab cuam tshuam rau kev ruaj khov ntawm lub voj voog. Qhov muaj peev xwm faib tawm kuj tseem tuaj yeem xa suab nrov mus rau qhov chaw tso zis los ntawm kev sib txuas, ua rau lub zog hluav taws xob nce ntxiv thiab txo qhov zoo ntawm cov zis.
5. Kev txwv ntawm kev tsim qauv thiab cov nqi nce ntxiv. Yuav kom txo tau qhov cuam tshuam ntawm lub peev xwm faib tawm, tej zaum yuav tsim nyog los tsim cov voj voog them rov qab RC buffer ntxiv, uas ua rau qhov nyuaj thiab tus nqi ntawm kev tsim voj voog nce ntxiv. Hauv cov xwm txheej siab, kom txo qhov peev xwm faib tawm, tej zaum yuav tsim nyog siv cov ntaub ntawv rwb thaiv tsev kim dua thiab cov txheej txheem nyuaj los tsim cov transformers, yog li ua rau cov nqi nce ntxiv.
Hauv cov transformers siab zaus, peb tuaj yeem txo qhov capacitance faib tawm ntawm lub transformer los ntawm kev nce qhov deb ntawm cov windings, nce qhov tuab ntawm rwb thaiv tsev, siv cov khoom siv rwb thaiv tsev dielectric qis, txhim kho cov txheej txheem winding, thiab nce kev tsim cov txheej tiv thaiv.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-03-2025
