Basic Cheebtsam ntawm switching zog mov
1 Taw qhia txog kev hloov hluav taws xob
Cov ntaub ntawv no yog kev cob qhia hnyav tom qab Zhang Zhansong qhov kev hloov pauv hloov hluav taws xob siab heev. Raws li txoj kev npaj, tom qab Shen Gong piav qhia txog kev tsim transformer, tsab xov xwm no luv luv qhia txog lub hauv paus ntsiab lus ntawm kev tsim transformer, tsom rau lub hauv paus ntsiab lus ntawm kev ua haujlwm hauv Circuit Court thiab kev suav ntawm cov khoom tseem ceeb hauv cov txheej txheem tsim. thiab xaiv.
Cov txheej txheem ua haujlwm ntawm kev hloov hluav taws xob hloov pauv tau yooj yim to taub, thiab nws muaj peb qhov sib txawv:
Hloov: Lub zog hluav taws xob ua haujlwm nyob rau hauv lub xeev hloov tsis yog lub xeev linear
High zaus: lub zog hluav taws xob cov khoom siv hluav taws xob ua haujlwm ntawm cov zaus ntau zaus tsis muaj zaus tsawg ze rau kev lag luam zaus
DC: Lub tshuab hluav taws xob hloov hluav taws xob tso tawm DC hloov AC, thiab tseem tuaj yeem tso zis ntau zaus AC xws li hluav taws xob hloov hluav taws xob.
Switching power supply classification:
Cov khoom siv hluav taws xob hloov pauv tau muab faib ua ntau hom raws li qhov topology: phaw boost rau pem hauv ntej flyback ib nrab-bridge puv-bridge LLC, thiab lwm yam, tab sis nyob rau hauv qhov tseeb, switching fais fab mov muaj tsuas yog ob hom kev ua hauj lwm: pem hauv ntej: nws kis tau lub zog thaum lub hloov raj. yog qhib, thiab flyback: Lub zog yog pauv thaum lub qhov hluav taws xob tawm.
Hom tam sim no PWM ib leeg-kawg flyback fais fab mov
Qhov zoo ntawm hom flyback fais fab mov: cov qauv yooj yim thiab tus nqi qis, tsim nyog rau cov khoom siv hluav taws xob tsawg.
Qhov tsis zoo ntawm hom flyback fais fab mov: lub zog me me, feem ntau qis dua 150w, loj ripple, tsis tshua muaj hluav taws xob thauj khoom, feem ntau ntau dua 5 feem pua.
Qhov nyuaj ntawm kev tsim ntawm hom flyback fais fab mov yog qhov tsim ntawm lub transformer, tshwj xeeb tshaj yog cov transformer nrog dav input voltage thiab ntau outputs.
Piv txwv los piav txog tus txheej txheem tsim
Yuav kom nkag siab txog cov txheej txheem kev suav kom ntxaws hauv kev tsim qauv kom meej meej, peb yuav siv 220VAC-380VAC cov tswv yim, ntxiv rau 5V ± 3 feem pua (5A), ± 15 ± 5 feem pua (0.5A) peb-txoj kev sib xyaw-hauv av tso tawm flyback fais fab mov ua piv txwv los piav qhia cov txheej txheem tsim.
Muab cov kev xav tau saum toj no, cov tswv yim xaiv yog raws li hauv qab no:
Lub zog tag nrho ntawm lub zog hluav taws xob P{{0}}*5W ntxiv rau 15*0.5*2=40W, lub zog me me, koj tuaj yeem xaiv lub flyback switching fais fab mov.
Lub hwj chim ntawm flyback fais fab mov tsuas yog 40W thiab nws belongs rau ntau yam outputs, ntxiv rau 5V ± 3 feem pua, ripple ± 150mV, ± 15 ± 5 feem pua. 5V yuav tsum muaj kev ua haujlwm siab, yog li 5v yog siv los ua cov lus qhia tseem ceeb ntawm cov khoom siv hluav taws xob. Xav txog kev tswj tus ntoo khaub lig muaj peev xwm ntawm 5V rau ± 15V, lub zog hloov hluav taws xob txais yuav hom tsis tu ncua (DCM).
Lub chip fais fab mov coil siv 15V tso zis, tab sis nws lub zog me me, yog li nws tsis quav ntsej hauv cov txheej txheem suav.
Lub zog hluav taws xob me me, thiab qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv tsuas yog ± 30 feem pua, yog li tsis xav tau PFC Circuit Court.
