Analysis ntawm high-frequency switching fais fab mov transformer
Nyob rau hauv cov khoom siv hluav taws xob peb tuaj yeem tiv tauj nrog txhua hnub, peb tuaj yeem pom ntau tusmagnetic tub ntxhaisCheebtsam, cov uas muaj lub plawv ntawm lubswitching fais fab movmodule - ibhloov transformer. Niaj hnub no, cov khoom siv hluav taws xob hauv lub neej muaj ntau thiab ntau cov kev cai nruj heev rau cov tsos ntawm cov khoom me me thiab ultra-nyias. Raws li lub plawv ntawm lub zog ntawm cov khoom siv hluav taws xob no, cov khoom siv hluav taws xob hloov pauv hloov tau muaj qhov zoo ntawm kev ua haujlwm siab, kub zoo thiab me me. Yog li ntawd, ntau yam khoom siv hluav taws xob yog cov khoom siv hluav taws xob ntau zaus. Raws li cov kws tshaj lij hauv kev lag luam hluav taws xob, koj yuav tsum paub qee yam txog lub tshuab hluav taws xob hloov hluav taws xob hloov hluav taws xob.
Lub transformer yog ib qho cuab yeej siv lub hauv paus ntsiab lus ntawm electromagnetic induction los pauv tam sim no. Nws cov khoom tseem ceeb suav nrogthawj kauj, theem nrab kaujthiabhlau core.
Hauv kev ua haujlwm hauv hluav taws xob, transformers feem ntau tuaj yeem pom. Feem ntau siv yog nyob rau hauv lub hwj chim mov module raws li ib tug voltage hloov dua siab tshiab thiab kev rho tawm:
①: Kev hloov pauv tuaj yeem muab faib ua ob hom: qib nce thiab nqis nqis. Cov khoom siv hluav taws xob hloov pauv feem ntau yog nqis qis. Cov khoom siv hluav taws xob zoo li no feem ntau yog siv rau hauv cov khoom siv hluav taws xob hauv desktop, lub laptop adapters, lub xov tooj ntawm tes chargers, TV fais fab mov, mov cookers, tub yees, induction cookers, fais fab mov, thiab lwm yam. Cov no yog AC inputs uas dhau los ntawm tus choj rectifier thiab loj capacitor rectifier filtering. kom tau txais high-voltage DC.
②: Kev txhawb nqa feem ntau yog siv rau hauv cov khoom siv hluav taws xob inverter lossis DC-DC kab, nrog cov khoom siv hluav taws xob thaum muaj xwm ceev, thiab lub roj teeb 12V tau hloov mus rau 220V tso zis rau cov khoom siv hluav taws xob.
③: Kev sib cais ntawmhigh-frequency hloov transformersyog qhov yuav tsum tau muaj kev nyab xeeb los xyuas kom muaj kev nyab xeeb ntawm cov khoom siv hluav taws xob. Thaum AC cov tswv yim, qhov hloov pauv hloov pauv yuav tsum muaj kev nyab xeeb kom ua tiav kev sib cais ntawm thawj AC cov tswv yim thiab cov khoom siv hluav taws xob thib ob. Thawj winding ntawm lub transformer yog cais nrog insulating daim kab xev, thiab cov thawj thiab thib ob sab ntawm lub cev pob txha yog cais. AC dhau los ntawm tib neeg lub cev thiab tsim lub voj nrog lub ntiaj teb, ua rau muaj kev phom sij ntawm tib neeg kev coj ua. Muaj cov kev ntsuas high-voltage ntawm transformers, feem ntau xav tau 3KV.
Tam sim no kev sib raug zoo ntawm thawj kauj thiab theem nrab kauj:
Thaum lub transformer khiav nrog ib tug load, qhov kev hloov nyob rau hauv lub thib ob kauj tam sim no yuav ua rau ib tug coj hloov nyob rau hauv thawj kauj tam sim no. Raws li lub hauv paus ntsiab lus ntawm kev sib nqus muaj peev xwm sib npaug, nws tau txiav txim siab tias tam sim no ntawm thawj thiab theem nrab coils yog inversely proportional rau tus naj npawb ntawm cov kauj. Tam sim no nyob rau sab nrog ntau lem yog me me, thiab tam sim no nyob rau sab nrog tsawg lem yog loj.
Nws tuaj yeem qhia los ntawm cov qauv hauv qab no: thawj kauj tam sim no / theem nrab coil tam sim no = theem nrab coil hloov / thawj kauj ruam hloov.
Cov khoom siv coil ntawm transformer muaj xws lienameled hlau, peb-txheej insulated hlau, tooj liab ntawv ci, thiabdaim ntawv tooj. Enameled hlau feem ntau siv ntau txoj hlua twisted hlau. Qhov kom zoo dua ntawm ntau txoj hlua twisted hlau yog kom tsis txhob muaj cov nyhuv ntawm daim tawv nqaij ntawm tooj liab, tab sis ntau txoj hlua twisted hlau yuav ua rau lub suab nrov. Peb-txheej insulated hlau yog siv nyob rau hauv transformers nrog tsis txaus kev nyab xeeb deb los yoglub cev mecheeb tsam, thiab tooj liab ntawv ci thiab tooj liab ntawv yog siv nyob rau hauv high-power transformers.
Txoj kev winding ntawm lub kauj tuaj yeem txhim kho EMI ntawm transformer, tshwj xeeb tshaj yog nyob rau hauv cov khoom siv hluav taws xob qis qis. Coil winding thiab shielding tseem ceeb heev rau EMI. Lub winding ntawm lub kauj cuam tshuam cuam tshuam rau cov xau inductance thiab parasitic capacitance ntawm lub transformer, thiab muaj kev cuam tshuam rau lub transformer poob.
Qhov txawv ntawmtsawg zaus transformersthiabhigh-frequency transformers:
① Transformer ua haujlwm zaus
Raws li covsib txawv kev khiav hauj lwm zaus ntawm lub transformer, feem ntau nws tuaj yeem muab faib ua tsawg zaus transformers thiab high-frequency transformers. Piv txwv li, nyob rau hauv lub neej txhua hnub, qhov zaus ntawm kev lag luam zaus AC yog 50Hz, thiab peb hu ua transformer ua hauj lwm ntawm qhov zaus no transformer tsawg zaus; thaum lub sij hawm khiav hauj lwm zaus ntawm high-frequency transformer tuaj yeem ncav cuag kaum ntawm KHz mus txog ntau pua KHz. Rau low-frequency transformers thiab high-frequency transformers nrog tib lub zog tso zis, qhov ntim ntawm high-frequency transformer yog ntau me dua li ntawm cov low-frequency transformer. Lub transformer yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob. Txhawm rau kom ntseeg tau tias lub zog tso zis thaum txo qhov ntim, yuav tsum siv lub tshuab hluav taws xob ntau zaus, yog li siv lub tshuab hluav taws xob ntau zaus hauv kev hloov hluav taws xob.
② Kev ua haujlwm ntawm transformer
Lub hauv paus ntsiab lus ua haujlwm ntawm high-frequency transformer thiab low-frequency transformer yog tib yam. Ob leeg ua haujlwm ntawm lub hauv paus ntsiab lus ntawm electromagnetic induction, tab sis nyob rau hauv cov nqe lus ntawm kev tsim khoom, cov ntaub ntawv siv rau lawv cov cores yog txawv. Cov tub ntxhais hlau ntawm lub tshuab hluav taws xob tsawg zaus feem ntau yog ua los ntawm ntau cov ntaub ntawv silicon steel stacked ua ke, thaum cov tub ntxhais hlau ntawm lub high-frequency transformer yog ua los ntawm high-frequency magnetic cov ntaub ntawv.
③ Transformer kis teeb liab
Nyob rau hauv DC voltage-stabilized fais fab mov Circuit Court, lub low-frequency transformer kis ib tug sine yoj teeb liab. Nyob rau hauv lub switching fais fab mov Circuit Court, lub high-frequency transformer kis ib tug high-frequency mem tes square wave teeb liab.
Lub luag haujlwm tseem ceeb ntawm transformer yog: kev hloov pauv voltage; hloov impedance; muab cais nyob ib leeg; voltage stabilization (magnetic saturation transformer), thiab lwm yam Transformers yog siv nyob rau hauv yuav luag tag nrho cov khoom siv hluav taws xob thiab yog ib feem tseem ceeb. Lub hauv paus ntsiab lus ntawm transformer yog yooj yim. Raws li kev siv ntau zaus thiab kev siv sib txawv, cov txheej txheem winding ntawm lub transformer kuj yuav muaj qhov sib txawv.
15 xyoo ntawm kev tsim khoom siv hluav taws xob
Post lub sij hawm: Oct-17-2024