Taw qhia rau Flyback Transformer

Raws li koj txhua tus paub, transformer yog ib qho khoom siv hluav taws xob uas hloov hluav taws xob siab mus rau qhov tsis tshua muaj hluav taws xob thiab rov ua dua siv kev sib nrig sib induction.

Lub flyback transformer yog ib hom tshwj xeeb ntawm cov kauj ruam-up transformer uas tsim cov teeb liab hluav taws xob siab thiab muaj peev xwm txhawb nqa loj loj. Cov raj duab thiab CRT TV yog qee qhov kev siv piv txwv uas siv flyback transformer.

Nrog rau kev tawm tswv yim ntawm 230 V, cov hloov pauv no tuaj yeem muab qhov tso tawm ntawm ib puag ncig 20, 000 V. Lawv tuaj yeem ua haujlwm ntawm qhov hluav taws xob tsawg li 12 V txog 5V.

Tsim ntawm Flyback Transformer

Nws muaj cov khoom siv hluav taws xob tsawg tsawg. Ib qho kev hloov khoom siv uas muaj cov transistors lossis MOSFETs muaj nyob rau ntawm cov tswv yim los txiav thiab txiav tawm qhov hluav taws xob input ntawm thawj kauj. Lub coil thib ob muaj lub diode uas txwv cov dej ntws tam sim no hauv kev thim rov qab.

Fig 1. Kev tsim kho ntawm Flyback transformer

Tsis zoo li cov transformers ib txwm, lub flyback transformer yog tsim nyob rau hauv xws li ib txoj kev uas nws muaj peev xwm yuav txaus siab siv DC voltage. Lub hauv paus winding yog tsav los ntawm kev hloov pauv siv DC mov. Thaum cov kauj ruam tseem ceeb tau txais lub zog, cov hlau nplaum sib nqus tau xa mus rau theem ob. Tab sis txij li thaum lub thib ob kauj yog txuas nrog ib tug diode nyob rau hauv reverse bias, lub tam sim no tau khaws cia. Yog li ntawd tus mem tes tom ntej los ntawm cov thawj winding ntxiv rau qhov tam sim no khaws cia (piv txwv li lub zog khaws cia hauv cov mem tes dhau los). Qhov kev sib ntxiv tom ntej no ua rau muaj zog heev ntawm cov hluav taws xob ntawm cov zis.

Txoj cai ntawm Flyback Transformer

Lub flyback transformer ua haujlwm los ntawm kev khaws cia lub zog nyob rau hauv daim ntawv ntawm magnetic teb nyob rau hauv thawj ib nrab-lub voj voog thiab tom qab ntawd tso tawm lub zog nrog rov qab qhov hluav taws xob qhov hluav taws xob. Cov cuab yeej siv lub diode (tseem hu ua flyback diode) los ua thiab nres lub zog xa mus.

Fig. 2: Tam sim no thaum switching on thiab off

Thaum tus thawj coil hloov nyob rau hauv lub xeev ces vim inductance, hluav taws xob tam sim no yog tsim. Qhov thib ob kauj txuas txuas nrog flyback diode hauv series tawm tsam qhov tsim tam sim no. Hloov chaw, lub zog tau khaws cia rau hauv cov tub ntxhais sib nqus.

Tam sim no thaum kaw

Thaum tus thawj kauj hloov nyob rau hauv lub off-lub xeev, lub voltage polarity yog thim rov qab vim lub magnetic txoj cai ntawm induction, ua rau lub diode hloov mus rau pem hauv ntej bias. Yog li tam sim no, theem nrab coil pib ua tam sim no.

Qhov zoo ntawm Flyback converter

Ntau qhov hluav taws xob tuaj yeem muab tau thaum sib cais los ntawm thawj winding.

Ntau qhov voltages tuaj yeem tswj tau nrog ib qho kev tswj

Nws tuaj yeem ua haujlwm thoob plaws ntau yam input voltage

Daim ntawv thov ntawm Flyback Transformer

CRT TV tswj kab rov tav tswj beam

Telecommunication system rau DC-DC voltage hloov dua siab tshiab

Aeronautics kom tau txais cov khoom siv hluav taws xob siab

Hluav taws xob converters siv no transformer nyob rau hauv fluctuating frequencies thiab hloov low voltage mus rau high voltage

Cov transformers no kuj tseem siv nrog rau kev lag luam motors, generators thiab twj