Qhov zoo ntawm thawb-rub switching fais fab mov
Rectifier tso zis laub-rub transformer hloov pauv hloov khoom siv hluav taws xob muab khoom siv, vim tias ob lub raj hloov pauv ua haujlwm sib hloov, nws sib npaug rau ob lub zog hloov hluav taws xob thiab hloov hluav taws xob hloov hluav taws xob tso tawm hluav taws xob tib lub sijhawm, thiab nws cov zis hluav taws xob yog kwv yees li ob zaug. tso zis zog ntawm ib tug switching fais fab mov. Ob lub tshuab hloov pauv ntawm lub laub-rub lub zog hloov hluav taws xob muaj qhov dav dav hauv av. Piv nrog rau ib nrab-choj los yog tag nrho-bridge switching fais fab mov, lub tsav tsheb Circuit Court yog ntau yooj yim.
txoj cai ua haujlwm
Lub rectified tso zis laub-rub transformer switching fais fab mov, vim hais tias ob lub switching tubes ua hauj lwm alternately, yog sib npaug rau cov zis fais fab mov ntawm ob switching fais fab mov nyob rau tib lub sij hawm, thiab nws cov zis hwj chim yog hais txog ob zaug ntawm ib tug switching zog mov. Yog li ntawd, lub laub-rub transformer hloov fais fab mov muaj lub zog tso zis ntau thiab ua haujlwm siab. Tom qab choj rectification los yog tag nrho-yoj rectification, tsuas yog ib tug me me lim inductance thiab capacitance, thiab cov zis voltage ripple yuav tsawg heev.
Nyob rau hauv lub laub-rub Circuit Court, ob lub keyboards S1 thiab S2 tau hloov pauv, thiab AC voltages nrog cov theem rov qab yog tsim ntawm ob qho kawg ntawm windings N1 thiab N'1 raws li, thiab cov zis hluav taws xob tuaj yeem hloov pauv los ntawm kev hloov lub luag haujlwm. lub voj voog. Thaum S1 qhib, lub diode VD1 nyob rau hauv lub xeev, thiab tam sim no ntawm inductor L nce maj mam. Thaum S2 qhib, lub diode VD2 nyob rau hauv lub xeev, thiab tam sim no ntawm inductor L maj mam nce. Thaum ob lub keyboards raug kaw, ob qho tib si VD1 thiab VD2 tau qhib, txhua qhov sib koom ib nrab ntawm tam sim no. Lub ncov voltages uas S1 thiab S2 dais thaum lawv tawm hauv xeev yog ob zaug Ui. S1 thiab S2 tau qhib rau tib lub sijhawm, uas yog sib npaug rau luv luv Circuit Court ntawm thawj sab winding ntawm lub transformer, yog li ob lub keyboards yuav tsum zam kom tsis txhob qhib tib lub sijhawm. Lub voj voog ua haujlwm ntawm txhua qhov hloov pauv tsis tuaj yeem tshaj 50 feem pua, thiab yuav tsum muaj qhov chaw tuag.
Txij li thaum ob qho kev tswj hloov K1 thiab K2 nyob rau hauv lub laub-rub transformer switching fais fab mov ua hauj lwm hloov, cov zis voltage waveform yog symmetrical, thiab lub switching fais fab mov muab lub hwj chim tso zis rau lub load thaum lub sij hawm tag nrho kev ua hauj lwm voj voog, yog li ntawd lub instantaneous teb ceev. ntawm cov zis tam sim no siab heev, thiab cov yam ntxwv ntawm cov zis voltage yog qhov zoo heev. Lub laub-rub transformer switching fais fab mov yog lub zog hloov hluav taws xob nrog qhov siv hluav taws xob siab tshaj plaws ntawm tag nrho cov khoom siv hluav taws xob hloov. Nws tseem muaj peev xwm tswj tau lub hwj chim loj thaum lub input voltage tsawg heev, yog li lub laub-rub transformer hloov fais fab mov yog dav siv nyob rau hauv DC / AC inverters los yog DC / DC converter circuits nrog tsawg input voltage.
Tom qab lub laub-rub hloov fais fab mov yog choj rectified los yog tag nrho-yoj rectified, voltage ripple coefficient Sv thiab tam sim no ripple coefficient Si ntawm cov zis voltage yog tsawg heev, thiab tsuas yog ib tug me me lub zog cia lim capacitor los yog lub zog cia lim inductor yog xav tau. kom tau txais qhov tso zis voltage nrog me me voltage ripple thiab tam sim no ripple. Yog li ntawd, lub laub-rub switching fais fab mov yog ib tug switching fais fab mov nrog zoo heev output voltage yam ntxwv.
Tsis tas li ntawd, lub transformer ntawm lub laub-rub switching fais fab mov belongs rau bipolar magnetic polarization, thiab qhov sib nqus induction ntau tshaj li ob zaug ntawm unipolar magnetic polarization, thiab transformer core tsis tas yuav tawm hauv huab cua sib txawv. Yog li ntawd, qhov sib nqus permeability ntawm lub laub-rub lub zog hloov hluav taws xob transformer core yog ntau zaus ntau dua li ntawm unipolar sib nqus polarization rau pem hauv ntej lossis rov qab hloov hluav taws xob transformer core; Yog li, tus naj npawb ntawm cov thawj thiab theem nrab coil hloov ntawm lub laub-rub lub zog hloov pauv hloov pauv tuaj yeem muaj ntau tshaj li ob zaug ntawm cov kauj ruam thib ob ntawm lub unipolar magnetic polarization transformer. Yog li ntawd, qhov to thiab tooj liab kuj poob ntawm lub laub-rub lub zog hloov hluav taws xob transformer yog me dua li ntawm unipolar magnetic polarization transformer, thiab kev ua haujlwm ntawm kev hloov hluav taws xob hloov pauv tau siab heev.
Nyob rau hauv lub laub-rub switching conversion circuit, lub zog hloov dua siab tshiab yog tswj alternated los ntawm ob lub raj. Thaum cov zis hluav taws xob zoo ib yam, qhov tam sim no tsuas yog ib nrab ntawm tib-kawg hloov lub hwj chim raj, yog li qhov kev hloov pauv tau txo qis thiab kev ua haujlwm tau zoo dua qub.
qhov zoo
1. Cov zis tam sim no cov lus teb ceev ntawm lub laub-rub lub zog hloov hluav taws xob yog qhov siab heev, thiab cov yam ntxwv ntawm cov zis hluav taws xob yog qhov zoo heev. Push-rub switching fais fab mov yog lub zog hloov hluav taws xob nrog qhov siv hluav taws xob siab tshaj plaws ntawm txhua qhov hloov hluav taws xob.
Txij li thaum ob lub tshuab hluav taws xob tswj nyob rau hauv lub laub-rub lub zog hloov hluav taws xob ua haujlwm hloov pauv, qhov tso zis hluav taws xob waveform yog qhov sib luag, thiab lub zog hloov hluav taws xob muab cov hluav taws xob tso tawm rau lub nra ntawm tag nrho lub voj voog, yog li cov zis tam sim no cov lus teb ceev heev. , thiab cov yam ntxwv ntawm cov zis hluav taws xob yog qhov zoo heev. Push-rub switching fais fab mov yog lub zog hloov hluav taws xob nrog qhov siv hluav taws xob siab tshaj plaws ntawm txhua qhov hloov hluav taws xob. Nws tseem tuaj yeem tuav lub zog tso zis loj thaum lub zog tawm tswv yim tsawg heev, yog li lub laub-rub lub zog hloov pauv tau dav siv nyob rau hauv qis input voltage DC / AC inverters thiab DC / DC converter circuits.
2. Lub laub-rub lub zog hloov hluav taws xob yog lub zog hloov hluav taws xob nrog cov khoom siv hluav taws xob zoo.
Tom qab lub laub-rub hloov fais fab mov yog choj rectified los yog tag nrho-yoj rectified, nws cov zis voltage ripple coefficient thiab tam sim no ripple coefficient tsawg heev. Yog li ntawd, ib lub zog me me cia lim capacitor lossis lub zog cia lim inductor yog xav tau kom tau txais qhov tso zis hluav taws xob nrog qhov hluav taws xob me me ripple thiab tam sim no ripple. Yog li ntawd, lub laub-rub switching fais fab mov yog ib tug switching fais fab mov nrog zoo tso zis voltage yam ntxwv.
3. Lub toughness inductance thiab tooj liab tsis kam ntawm lub laub-rub lub zog hloov hluav taws xob transformer yog me dua li ntawm unipolar magnetized ncej transformer, thiab kev ua hauj lwm efficiency ntawm switching fais fab mov yog siab.
Lub transformer ntawm lub laub-rub switching fais fab mov belongs rau lub bipolar magnetization ncej, thiab sib nqus induction transformation ntau tshaj li ob zaug ntawm lub unipolar magnetization ncej, thiab transformer core tsis xav tau ib tug huab cua sib txawv. Yog li ntawd, qhov sib nqus permeability ntawm lub laub-rub hloov lub zog hloov hluav taws xob transformer core yog ntau zaus siab dua li ntawm lub hauv ntej los yog flyback switching fais fab mov transformer core nrog unipolar magnetization ncej. Nyob rau hauv txoj kev no, tus naj npawb ntawm cov lem ntawm lub hauv paus thiab theem nrab coils ntawm lub laub-rub lub zog hloov pauv hloov pauv tuaj yeem ua tau ntau dua ob npaug ntawm cov lem ntawm thawj thiab theem nrab coils ntawm unipolar magnetization ncej transformer. Yog li ntawd, qhov to thiab tooj liab tsis kam poob ntawm lub laub-rub lub zog hloov pauv hloov pauv me dua li ntawm unipolar magnetized ncej transformer, yog li kev ua haujlwm ntawm kev hloov pauv hluav taws xob ntau dua.
4. Kev tsav tsheb ntawm lub laub-rub lub zog hloov hluav taws xob yog qhov yooj yim.
Ob lub tshuab hloov pauv ntawm lub laub-rub lub zog hloov hluav taws xob muaj qhov dav dav hauv av. Piv nrog rau ib nrab-choj los yog tag nrho-bridge switching fais fab mov, lub tsav tsheb Circuit Court yog ntau yooj yim.
5. Lub laub-rub lub zog hloov hluav taws xob tsis muaj peev xwm ntawm kev sib koom ua ke ntawm ob lub tshuab hluav taws xob tswj xws li ib nrab-bridge thiab puv-choj hloov khoom siv hluav taws xob.
